Replaced try/catch blocks with assertj - apex-pdp

Removed try/catch blocks in apex-pdp with assertj assertions Part IV

Issue-ID: POLICY-2451
Change-Id: I4b6accb9f944195db9ccf8a5de165b169301ac7f
Signed-off-by: waynedunican <wayne.dunican@est.tech>

12 files changed, 250 insertions, 636 deletions

diff --git a/plugins/plugins-context/plugins-context-schema/plugins-context-schema-avro/src/test/java/org/onap/policy/apex/plugins/context/schema/avro/AvroSchemaEnumTest.java b/plugins/plugins-context/plugins-context-schema/plugins-context-schema-avro/src/test/java/org/onap/policy/apex/plugins/context/schema/avro/AvroSchemaEnumTest.java
index 51ac21209..e4a336676 100644
--- a/plugins/plugins-context/plugins-context-schema/plugins-context-schema-avro/src/test/java/org/onap/policy/apex/plugins/context/schema/avro/AvroSchemaEnumTest.java
+++ b/plugins/plugins-context/plugins-context-schema/plugins-context-schema-avro/src/test/java/org/onap/policy/apex/plugins/context/schema/avro/AvroSchemaEnumTest.java
@@ -21,8 +21,8 @@
 
 package org.onap.policy.apex.plugins.context.schema.avro;
 
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
 import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.fail;
 
 import java.io.IOException;
 import org.apache.avro.generic.GenericData.EnumSymbol;
@@ -120,35 +120,18 @@ public class AvroSchemaEnumTest {
 
         testUnmarshalMarshal(schemaHelper, "src/test/resources/data/EnumExampleHearts.json");
 
-        try {
-            testUnmarshalMarshal(schemaHelper, "src/test/resources/data/EnumExampleNull.json");
-            fail("This test should throw an exception here");
-        } catch (final Exception e) {
-            assertEquals("AvroTest:0.0.1: object \"null\" Avro unmarshalling failed: Expected fixed. Got VALUE_NULL",
-                    e.getMessage());
-        }
-        try {
-            testUnmarshalMarshal(schemaHelper, "src/test/resources/data/EnumExampleNull.json");
-            fail("This test should throw an exception here");
-        } catch (final Exception e) {
-            assertEquals("AvroTest:0.0.1: object \"null\" Avro unmarshalling failed: Expected fixed. Got VALUE_NULL",
-                    e.getMessage());
-        }
-        try {
-            testUnmarshalMarshal(schemaHelper, "src/test/resources/data/EnumExampleBad0.json");
-            fail("This test should throw an exception here");
-        } catch (final Exception e) {
-            assertEquals("AvroTest:0.0.1: object \"\"TWEED\"\" Avro unmarshalling failed: Unknown symbol in enum TWEED",
-                    e.getMessage());
-        }
-        try {
-            testUnmarshalMarshal(schemaHelper, "src/test/resources/data/EnumExampleBad1.json");
-            fail("This test should throw an exception here");
-        } catch (final Exception e) {
-            assertEquals(
-                    "AvroTest:0.0.1: object \"\"Hearts\"\" Avro unmarshalling failed: Unknown symbol in enum Hearts",
-                    e.getMessage());
-        }
+        assertThatThrownBy(() -> testUnmarshalMarshal(schemaHelper, "src/test/resources/data/EnumExampleNull.json"))
+            .hasMessage("AvroTest:0.0.1: object \"null\" Avro unmarshalling failed: Expected fixed. "
+                    + "Got VALUE_NULL");
+        assertThatThrownBy(() -> testUnmarshalMarshal(schemaHelper, "src/test/resources/data/EnumExampleNull.json"))
+            .hasMessage("AvroTest:0.0.1: object \"null\" Avro unmarshalling failed: Expected fixed. "
+                    + "Got VALUE_NULL");
+        assertThatThrownBy(() -> testUnmarshalMarshal(schemaHelper, "src/test/resources/data/EnumExampleBad0.json"))
+            .hasMessage("AvroTest:0.0.1: object \"\"TWEED\"\" Avro unmarshalling failed: Unknown symbol "
+                    + "in enum TWEED");
+        assertThatThrownBy(() -> testUnmarshalMarshal(schemaHelper, "src/test/resources/data/EnumExampleBad1.json"))
+            .hasMessage("AvroTest:0.0.1: object \"\"Hearts\"\" Avro unmarshalling failed: Unknown symbol "
+                    + "in enum Hearts");
     }
 
     /**
diff --git a/plugins/plugins-context/plugins-context-schema/plugins-context-schema-avro/src/test/java/org/onap/policy/apex/plugins/context/schema/avro/AvroSchemaFixedTest.java b/plugins/plugins-context/plugins-context-schema/plugins-context-schema-avro/src/test/java/org/onap/policy/apex/plugins/context/schema/avro/AvroSchemaFixedTest.java
index 19f0761a1..368619ee8 100644
--- a/plugins/plugins-context/plugins-context-schema/plugins-context-schema-avro/src/test/java/org/onap/policy/apex/plugins/context/schema/avro/AvroSchemaFixedTest.java
+++ b/plugins/plugins-context/plugins-context-schema/plugins-context-schema-avro/src/test/java/org/onap/policy/apex/plugins/context/schema/avro/AvroSchemaFixedTest.java
@@ -21,9 +21,9 @@
 
 package org.onap.policy.apex.plugins.context.schema.avro;
 
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
-import static org.junit.Assert.fail;
 
 import java.io.IOException;
 import org.apache.avro.generic.GenericData.Fixed;
@@ -98,15 +98,10 @@ public class AvroSchemaFixedTest {
         schemas.getSchemasMap().put(avroSchema.getKey(), avroSchema);
         final SchemaHelper schemaHelper = new SchemaHelperFactory().createSchemaHelper(testKey, avroSchema.getKey());
 
-        try {
-            schemaHelper.createNewInstance();
-            fail("Test should throw an exception here");
-        } catch (final Exception e) {
-            assertEquals("AvroTest:0.0.1: could not create an instance "
+        assertThatThrownBy(() -> schemaHelper.createNewInstance())
+            .hasMessage("AvroTest:0.0.1: could not create an instance "
                     + "of class \"org.apache.avro.generic.GenericData$Fixed\" "
-                    + "using the default constructor \"Fixed()\"", e.getMessage());
-        }
-
+                    + "using the default constructor \"Fixed()\"");
         final String inString = TextFileUtils.getTextFileAsString("src/test/resources/data/FixedExampleGood.json");
         final Fixed newFixedFull = (Fixed) schemaHelper.createNewInstance(inString);
         assertTrue(newFixedFull.toString().startsWith("[48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 65"));
@@ -128,35 +123,19 @@ public class AvroSchemaFixedTest {
 
         testUnmarshalMarshal(schemaHelper, "src/test/resources/data/FixedExampleGood.json");
 
-        try {
-            testUnmarshalMarshal(schemaHelper, "src/test/resources/data/FixedExampleNull.json");
-            fail("This test should throw an exception here");
-        } catch (final Exception e) {
-            assertEquals("AvroTest:0.0.1: object \"null\" Avro unmarshalling failed: Expected fixed. Got VALUE_NULL",
-                    e.getMessage());
-        }
-        try {
-            testUnmarshalMarshal(schemaHelper, "src/test/resources/data/FixedExampleNull.json");
-            fail("This test should throw an exception here");
-        } catch (final Exception e) {
-            assertEquals("AvroTest:0.0.1: object \"null\" Avro unmarshalling failed: Expected fixed. Got VALUE_NULL",
-                    e.getMessage());
-        }
-        try {
-            testUnmarshalMarshal(schemaHelper, "src/test/resources/data/FixedExampleBad0.json");
-            fail("This test should throw an exception here");
-        } catch (final Exception e) {
-            assertEquals("AvroTest:0.0.1: object \"\"BADBAD\"\" "
-                    + "Avro unmarshalling failed: Expected fixed length 64, but got6", e.getMessage());
-        }
-        try {
-            testUnmarshalMarshal(schemaHelper, "src/test/resources/data/FixedExampleBad1.json");
-            fail("This test should throw an exception here");
-        } catch (final Exception e) {
-            assertEquals("AvroTest:0.0.1: object "
-                    + "\"\"0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0\"\" "
-                    + "Avro unmarshalling failed: Expected fixed length 64, but got65", e.getMessage());
-        }
+        assertThatThrownBy(() -> testUnmarshalMarshal(schemaHelper, "src/test/resources/data/FixedExampleNull.json"))
+            .hasMessage("AvroTest:0.0.1: object \"null\" Avro unmarshalling failed: Expected fixed. "
+                    + "Got VALUE_NULL");
+        assertThatThrownBy(() -> testUnmarshalMarshal(schemaHelper, "src/test/resources/data/FixedExampleNull.json"))
+            .hasMessage("AvroTest:0.0.1: object \"null\" Avro unmarshalling failed: Expected fixed. "
+                    + "Got VALUE_NULL");
+        assertThatThrownBy(() -> testUnmarshalMarshal(schemaHelper, "src/test/resources/data/FixedExampleBad0.json"))
+            .hasMessage("AvroTest:0.0.1: object \"\"BADBAD\"\" "
+                + "Avro unmarshalling failed: Expected fixed length 64, but got6");
+        assertThatThrownBy(() -> testUnmarshalMarshal(schemaHelper, "src/test/resources/data/FixedExampleBad1.json"))
+            .hasMessage("AvroTest:0.0.1: object "
+                + "\"\"0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0123456789ABCDEF0\"\" "
+                + "Avro unmarshalling failed: Expected fixed length 64, but got65");
     }
 
     /**
diff --git a/plugins/plugins-context/plugins-context-schema/plugins-context-schema-avro/src/test/java/org/onap/policy/apex/plugins/context/schema/avro/AvroSchemaHelperBadSchemasTest.java b/plugins/plugins-context/plugins-context-schema/plugins-context-schema-avro/src/test/java/org/onap/policy/apex/plugins/context/schema/avro/AvroSchemaHelperBadSchemasTest.java
index 0eae99bfc..5bbaf97fa 100644
--- a/plugins/plugins-context/plugins-context-schema/plugins-context-schema-avro/src/test/java/org/onap/policy/apex/plugins/context/schema/avro/AvroSchemaHelperBadSchemasTest.java
+++ b/plugins/plugins-context/plugins-context-schema/plugins-context-schema-avro/src/test/java/org/onap/policy/apex/plugins/context/schema/avro/AvroSchemaHelperBadSchemasTest.java
@@ -1,27 +1,27 @@
 /*-
  * ============LICENSE_START=======================================================
  *  Copyright (C) 2016-2018 Ericsson. All rights reserved.
+ *  Modifications Copyright (C) 2020 Nordix Foundation
  * ================================================================================
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
- * 
+ *
  *      http://www.apache.org/licenses/LICENSE-2.0
- * 
+ *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
- * 
+ *
  * SPDX-License-Identifier: Apache-2.0
  * ============LICENSE_END=========================================================
  */
 
 package org.onap.policy.apex.plugins.context.schema.avro;
 
-import static org.junit.Assert.assertTrue;
-import static org.junit.Assert.fail;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
 
 import org.junit.After;
 import org.junit.Before;
@@ -83,71 +83,36 @@ public class AvroSchemaHelperBadSchemasTest {
         final AxContextSchema avroBadSchema0 = new AxContextSchema(new AxArtifactKey("AvroBad0", "0.0.1"), "AVRO", "}");
         schemas.getSchemasMap().put(avroBadSchema0.getKey(), avroBadSchema0);
 
-        try {
-            new SchemaHelperFactory().createSchemaHelper(testKey, avroBadSchema0.getKey());
-            fail("This test should throw an exception");
-        } catch (final Exception e) {
-            assertTrue(e.getMessage()
-                    .startsWith("AvroTest:0.0.1: avro context schema \"AvroBad0:0.0.1\" schema is invalid"));
-        }
-
+        assertThatThrownBy(() -> new SchemaHelperFactory().createSchemaHelper(testKey, avroBadSchema0.getKey()))
+            .hasMessageStartingWith("AvroTest:0.0.1: avro context schema \"AvroBad0:0.0.1\" schema is invalid");
         final AxContextSchema avroBadSchema1 = new AxContextSchema(new AxArtifactKey("AvroBad1", "0.0.1"), "AVRO", "");
         schemas.getSchemasMap().put(avroBadSchema1.getKey(), avroBadSchema1);
 
-        try {
-            new SchemaHelperFactory().createSchemaHelper(testKey, avroBadSchema1.getKey());
-            fail("This test should throw an exception");
-        } catch (final Exception e) {
-            assertTrue(e.getMessage()
-                    .startsWith("AvroTest:0.0.1: avro context schema \"AvroBad1:0.0.1\" schema is invalid"));
-        }
-
+        assertThatThrownBy(() -> new SchemaHelperFactory().createSchemaHelper(testKey, avroBadSchema1.getKey()))
+            .hasMessageStartingWith("AvroTest:0.0.1: avro context schema \"AvroBad1:0.0.1\" schema is invalid");
         final AxContextSchema avroBadSchema2 =
                 new AxContextSchema(new AxArtifactKey("AvroBad2", "0.0.1"), "AVRO", "{}");
         schemas.getSchemasMap().put(avroBadSchema2.getKey(), avroBadSchema2);
 
-        try {
-            new SchemaHelperFactory().createSchemaHelper(testKey, avroBadSchema2.getKey());
-            fail("This test should throw an exception");
-        } catch (final Exception e) {
-            assertTrue(e.getMessage()
-                    .startsWith("AvroTest:0.0.1: avro context schema \"AvroBad2:0.0.1\" schema is invalid"));
-        }
-
+        assertThatThrownBy(() -> new SchemaHelperFactory().createSchemaHelper(testKey, avroBadSchema2.getKey()))
+            .hasMessageStartingWith("AvroTest:0.0.1: avro context schema \"AvroBad2:0.0.1\" schema is invalid");
         final AxContextSchema avroBadSchema3 =
                 new AxContextSchema(new AxArtifactKey("AvroBad3", "0.0.1"), "AVRO", "{zooby}");
         schemas.getSchemasMap().put(avroBadSchema3.getKey(), avroBadSchema3);
 
-        try {
-            new SchemaHelperFactory().createSchemaHelper(testKey, avroBadSchema3.getKey());
-            fail("This test should throw an exception");
-        } catch (final Exception e) {
-            assertTrue(e.getMessage()
-                    .startsWith("AvroTest:0.0.1: avro context schema \"AvroBad3:0.0.1\" schema is invalid"));
-        }
-
+        assertThatThrownBy(() -> new SchemaHelperFactory().createSchemaHelper(testKey, avroBadSchema3.getKey()))
+            .hasMessageStartingWith("AvroTest:0.0.1: avro context schema \"AvroBad3:0.0.1\" schema is invalid");
         final AxContextSchema avroBadSchema4 =
                 new AxContextSchema(new AxArtifactKey("AvroBad4", "0.0.1"), "AVRO", "{\"zooby\"}");
         schemas.getSchemasMap().put(avroBadSchema4.getKey(), avroBadSchema4);
 
-        try {
-            new SchemaHelperFactory().createSchemaHelper(testKey, avroBadSchema4.getKey());
-            fail("This test should throw an exception");
-        } catch (final Exception e) {
-            assertTrue(e.getMessage()
-                    .startsWith("AvroTest:0.0.1: avro context schema \"AvroBad4:0.0.1\" schema is invalid"));
-        }
-
+        assertThatThrownBy(() -> new SchemaHelperFactory().createSchemaHelper(testKey, avroBadSchema4.getKey()))
+            .hasMessageStartingWith("AvroTest:0.0.1: avro context schema \"AvroBad4:0.0.1\" schema is invalid");
         final AxContextSchema avroBadSchema5 =
                 new AxContextSchema(new AxArtifactKey("AvroBad5", "0.0.1"), "AVRO", "{\"type\": \"zooby\"}");
         schemas.getSchemasMap().put(avroBadSchema5.getKey(), avroBadSchema5);
 
-        try {
-            new SchemaHelperFactory().createSchemaHelper(testKey, avroBadSchema5.getKey());
-            fail("This test should throw an exception");
-        } catch (final Exception e) {
-            assertTrue(e.getMessage()
-                    .startsWith("AvroTest:0.0.1: avro context schema \"AvroBad5:0.0.1\" schema is invalid"));
-        }
+        assertThatThrownBy(() -> new SchemaHelperFactory().createSchemaHelper(testKey, avroBadSchema5.getKey()))
+            .hasMessageStartingWith("AvroTest:0.0.1: avro context schema \"AvroBad5:0.0.1\" schema is invalid");
     }
 }
diff --git a/plugins/plugins-context/plugins-context-schema/plugins-context-schema-avro/src/test/java/org/onap/policy/apex/plugins/context/schema/avro/AvroSchemaHelperMarshalTest.java b/plugins/plugins-context/plugins-context-schema/plugins-context-schema-avro/src/test/java/org/onap/policy/apex/plugins/context/schema/avro/AvroSchemaHelperMarshalTest.java
index 004521c6c..d84481da8 100644
--- a/plugins/plugins-context/plugins-context-schema/plugins-context-schema-avro/src/test/java/org/onap/policy/apex/plugins/context/schema/avro/AvroSchemaHelperMarshalTest.java
+++ b/plugins/plugins-context/plugins-context-schema/plugins-context-schema-avro/src/test/java/org/onap/policy/apex/plugins/context/schema/avro/AvroSchemaHelperMarshalTest.java
@@ -21,9 +21,8 @@
 
 package org.onap.policy.apex.plugins.context.schema.avro;
 
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
 import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertTrue;
-import static org.junit.Assert.fail;
 
 import org.junit.After;
 import org.junit.Before;
@@ -109,24 +108,14 @@ public class AvroSchemaHelperMarshalTest {
 
         assertEquals("true", schemaHelper1.marshal2String(true));
         assertEquals("false", schemaHelper1.marshal2String(false));
-        try {
-            schemaHelper1.marshal2String(0);
-            fail("Test should throw an exception here");
-        } catch (final Exception e) {
-            e.printStackTrace();
-            assertEquals("AvroTest:0.0.1: object \"0\" Avro marshalling failed: "
+        assertThatThrownBy(() -> schemaHelper1.marshal2String(0))
+            .hasMessage("AvroTest:0.0.1: object \"0\" Avro marshalling failed: "
                     + "class java.lang.Integer cannot be cast to class java.lang.Boolean (java.lang.Integer and "
-                    + "java.lang.Boolean are in module java.base of loader 'bootstrap')", e.getMessage());
-        }
-        try {
-            schemaHelper1.marshal2String("0");
-            fail("Test should throw an exception here");
-        } catch (final Exception e) {
-            e.printStackTrace();
-            assertEquals("AvroTest:0.0.1: object \"0\" Avro marshalling failed: class java.lang.String cannot be cast "
-                    + "to class java.lang.Boolean (java.lang.String and java.lang.Boolean are in module java.base of "
-                    + "loader 'bootstrap')", e.getMessage());
-        }
+                    + "java.lang.Boolean are in module java.base of loader 'bootstrap')");
+        assertThatThrownBy(() -> schemaHelper1.marshal2String("0"))
+            .hasMessage("AvroTest:0.0.1: object \"0\" Avro marshalling failed: class java.lang.String "
+                + "cannot be cast to class java.lang.Boolean (java.lang.String and java.lang.Boolean are in module"
+                + " java.base of loader 'bootstrap')");
     }
 
     /**
@@ -148,20 +137,11 @@ public class AvroSchemaHelperMarshalTest {
         assertEquals("-1", schemaHelper2.marshal2String(-1.23));
         assertEquals("2147483647", schemaHelper2.marshal2String(2147483647));
         assertEquals("-2147483648", schemaHelper2.marshal2String(-2147483648));
-        try {
-            schemaHelper2.marshal2String("Hello");
-            fail("Test should throw an exception here");
-        } catch (final Exception e) {
-            assertTrue(e.getMessage().startsWith("AvroTest:0.0.1: object \"Hello\" Avro marshalling failed: "
-                    + "class java.lang.String cannot be cast to class java.lang.Number"));
-        }
-        try {
-            schemaHelper2.marshal2String(null);
-            fail("Test should throw an exception here");
-        } catch (final Exception e) {
-            assertTrue(e.getMessage()
-                    .startsWith("AvroTest:0.0.1: cannot encode a null object of class \"java.lang.Integer\""));
-        }
+        assertThatThrownBy(() -> schemaHelper2.marshal2String("Hello"))
+            .hasMessageStartingWith("AvroTest:0.0.1: object \"Hello\" Avro marshalling failed: "
+                + "class java.lang.String cannot be cast to class java.lang.Number");
+        assertThatThrownBy(() -> schemaHelper2.marshal2String(null))
+            .hasMessageStartingWith("AvroTest:0.0.1: cannot encode a null object of class \"java.lang.Integer\"");
     }
 
     /**
@@ -181,20 +161,11 @@ public class AvroSchemaHelperMarshalTest {
         assertEquals("-1", schemaHelper3.marshal2String(-1L));
         assertEquals("9223372036854775807", schemaHelper3.marshal2String(9223372036854775807L));
         assertEquals("-9223372036854775808", schemaHelper3.marshal2String(-9223372036854775808L));
-        try {
-            schemaHelper3.marshal2String("Hello");
-            fail("Test should throw an exception here");
-        } catch (final Exception e) {
-            assertTrue(e.getMessage().startsWith("AvroTest:0.0.1: object \"Hello\" Avro marshalling failed: "
-                    + "class java.lang.String cannot be cast to class java.lang.Long"));
-        }
-        try {
-            schemaHelper3.marshal2String(null);
-            fail("Test should throw an exception here");
-        } catch (final Exception e) {
-            assertTrue(e.getMessage()
-                    .startsWith("AvroTest:0.0.1: cannot encode a null object of class \"java.lang.Long\""));
-        }
+        assertThatThrownBy(() -> schemaHelper3.marshal2String("Hello"))
+            .hasMessageStartingWith("AvroTest:0.0.1: object \"Hello\" Avro marshalling failed: "
+                + "class java.lang.String cannot be cast to class java.lang.Long");
+        assertThatThrownBy(() -> schemaHelper3.marshal2String(null))
+            .hasMessageStartingWith("AvroTest:0.0.1: cannot encode a null object of class \"java.lang.Long\"");
     }
 
     /**
@@ -218,20 +189,11 @@ public class AvroSchemaHelperMarshalTest {
         assertEquals("-9.223372E18", schemaHelper4.marshal2String(-9.223372E18F));
         assertEquals("9.223372E18", schemaHelper4.marshal2String(9.223372E18F));
         assertEquals("-9.223372E18", schemaHelper4.marshal2String(-9.223372E18F));
-        try {
-            schemaHelper4.marshal2String("Hello");
-            fail("Test should throw an exception here");
-        } catch (final Exception e) {
-            assertTrue(e.getMessage().startsWith("AvroTest:0.0.1: object \"Hello\" Avro marshalling failed: "
-                    + "class java.lang.String cannot be cast to class java.lang.Float"));
-        }
-        try {
-            schemaHelper4.marshal2String(null);
-            fail("Test should throw an exception here");
-        } catch (final Exception e) {
-            assertTrue(e.getMessage()
-                    .startsWith("AvroTest:0.0.1: cannot encode a null object of class \"java.lang.Float\""));
-        }
+        assertThatThrownBy(() -> schemaHelper4.marshal2String("Hello"))
+            .hasMessageStartingWith("AvroTest:0.0.1: object \"Hello\" Avro marshalling failed: "
+                + "class java.lang.String cannot be cast to class java.lang.Float");
+        assertThatThrownBy(() -> schemaHelper4.marshal2String(null))
+            .hasMessageStartingWith("AvroTest:0.0.1: cannot encode a null object of class \"java.lang.Float\"");
     }
 
     /**
@@ -255,20 +217,11 @@ public class AvroSchemaHelperMarshalTest {
         assertEquals("-9.223372036854776E18", schemaHelper5.marshal2String(-9.223372036854776E18));
         assertEquals("9.223372036854776E18", schemaHelper5.marshal2String(9.223372036854776E18));
         assertEquals("-9.223372036854776E18", schemaHelper5.marshal2String(-9.223372036854776E18));
-        try {
-            schemaHelper5.marshal2String("Hello");
-            fail("Test should throw an exception here");
-        } catch (final Exception e) {
-            assertTrue(e.getMessage().startsWith("AvroTest:0.0.1: object \"Hello\" Avro marshalling failed: "
-                    + "class java.lang.String cannot be cast to class java.lang.Double"));
-        }
-        try {
-            schemaHelper5.marshal2String(null);
-            fail("Test should throw an exception here");
-        } catch (final Exception e) {
-            assertTrue(e.getMessage()
-                    .startsWith("AvroTest:0.0.1: cannot encode a null object of class \"java.lang.Double\""));
-        }
+        assertThatThrownBy(() -> schemaHelper5.marshal2String("Hello"))
+            .hasMessageStartingWith("AvroTest:0.0.1: object \"Hello\" Avro marshalling failed: "
+                + "class java.lang.String cannot be cast to class java.lang.Double");
+        assertThatThrownBy(() -> schemaHelper5.marshal2String(null))
+            .hasMessageStartingWith("AvroTest:0.0.1: cannot encode a null object of class \"java.lang.Double\"");
     }
 
     /**
@@ -293,13 +246,8 @@ public class AvroSchemaHelperMarshalTest {
         assertEquals("\"9223372036854775808\"", schemaHelper7.marshal2String("9223372036854775808"));
         assertEquals("\"-9223372036854775809\"", schemaHelper7.marshal2String("-9223372036854775809"));
         assertEquals("\"Hello\"", schemaHelper7.marshal2String("Hello"));
-        try {
-            schemaHelper7.marshal2String(null);
-            fail("Test should throw an exception here");
-        } catch (final Exception e) {
-            assertTrue(e.getMessage()
-                    .startsWith("AvroTest:0.0.1: cannot encode a null object of class \"java.lang.String\""));
-        }
+        assertThatThrownBy(() -> schemaHelper7.marshal2String(null))
+            .hasMessageStartingWith("AvroTest:0.0.1: cannot encode a null object of class \"java.lang.String\"");
     }
 
     /**
@@ -317,12 +265,7 @@ public class AvroSchemaHelperMarshalTest {
         final String helloOut = schemaHelper.marshal2String(helloBytes);
         assertEquals("\"hello\"", helloOut);
 
-        try {
-            schemaHelper.marshal2String(null);
-            fail("Test should throw an exception here");
-        } catch (final Exception e) {
-            assertTrue(e.getMessage()
-                    .startsWith("AvroTest:0.0.1: cannot encode a null object of class \"[Ljava.lang.Byte;\""));
-        }
+        assertThatThrownBy(() -> schemaHelper.marshal2String(null))
+            .hasMessageStartingWith("AvroTest:0.0.1: cannot encode a null object of class \"[Ljava.lang.Byte;\"");
     }
 }
diff --git a/plugins/plugins-context/plugins-context-schema/plugins-context-schema-avro/src/test/java/org/onap/policy/apex/plugins/context/schema/avro/AvroSchemaHelperUnmarshalTest.java b/plugins/plugins-context/plugins-context-schema/plugins-context-schema-avro/src/test/java/org/onap/policy/apex/plugins/context/schema/avro/AvroSchemaHelperUnmarshalTest.java
index fee21ae2a..2b6050acc 100644
--- a/plugins/plugins-context/plugins-context-schema/plugins-context-schema-avro/src/test/java/org/onap/policy/apex/plugins/context/schema/avro/AvroSchemaHelperUnmarshalTest.java
+++ b/plugins/plugins-context/plugins-context-schema/plugins-context-schema-avro/src/test/java/org/onap/policy/apex/plugins/context/schema/avro/AvroSchemaHelperUnmarshalTest.java
@@ -1,7 +1,7 @@
 /*-
  * ============LICENSE_START=======================================================
  *  Copyright (C) 2016-2018 Ericsson. All rights reserved.
- *  Modifications Copyright (C) 2019 Nordix Foundation.
+ *  Modifications Copyright (C) 2019-2020 Nordix Foundation.
  * ================================================================================
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -21,9 +21,8 @@
 
 package org.onap.policy.apex.plugins.context.schema.avro;
 
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
 import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertTrue;
-import static org.junit.Assert.fail;
 
 import org.apache.avro.util.Utf8;
 import org.junit.After;
@@ -91,23 +90,13 @@ public class AvroSchemaHelperUnmarshalTest {
         final SchemaHelper schemaHelper0 = new SchemaHelperFactory().createSchemaHelper(testKey,
                         avroNullSchema.getKey());
 
-        try {
-            schemaHelper0.createNewInstance();
-            fail("test should throw an exception here");
-        } catch (final Exception e) {
-            assertEquals("AvroTest:0.0.1: could not create an instance, schema class for the schema is null",
-                            e.getMessage());
-        }
-
+        assertThatThrownBy(schemaHelper0::createNewInstance)
+            .hasMessage("AvroTest:0.0.1: could not create an instance, schema class for the schema is null");
         assertEquals(null, schemaHelper0.unmarshal("null"));
 
-        try {
-            schemaHelper0.unmarshal("123");
-            fail("test should throw an exception here");
-        } catch (final Exception e) {
-            assertEquals("AvroTest:0.0.1: object \"123\" Avro unmarshalling failed: "
-                            + "Expected null. Got VALUE_NUMBER_INT", e.getMessage());
-        }
+        assertThatThrownBy(() -> schemaHelper0.unmarshal("123"))
+            .hasMessage("AvroTest:0.0.1: object \"123\" Avro unmarshalling failed: "
+                + "Expected null. Got VALUE_NUMBER_INT");
     }
 
     /**
@@ -122,25 +111,17 @@ public class AvroSchemaHelperUnmarshalTest {
         final SchemaHelper schemaHelper1 = new SchemaHelperFactory().createSchemaHelper(testKey,
                         avroBooleanSchema.getKey());
 
-        try {
-            schemaHelper1.createNewInstance();
-            fail("test should throw an exception here");
-        } catch (final Exception e) {
-            assertEquals("AvroTest:0.0.1: could not create an instance of class \"java.lang.Boolean\" "
-                            + "using the default constructor \"Boolean()\"", e.getMessage());
-        }
+        assertThatThrownBy(schemaHelper1::createNewInstance)
+            .hasMessage("AvroTest:0.0.1: could not create an instance of class \"java.lang.Boolean\" "
+                + "using the default constructor \"Boolean()\"");
         assertEquals(true, schemaHelper1.createNewInstance("true"));
 
         assertEquals(true, schemaHelper1.unmarshal("true"));
         assertEquals(false, schemaHelper1.unmarshal("false"));
-        try {
-            schemaHelper1.unmarshal(0);
-            fail("Test should throw an exception here");
-        } catch (final Exception e) {
-            assertEquals("AvroTest:0.0.1: object \"0\" of type \"java.lang.Integer\" must be assignable to "
-                            + "\"java.lang.Boolean\" or be a Json string representation of it for "
-                            + "Avro unmarshalling", e.getMessage());
-        }
+        assertThatThrownBy(() -> schemaHelper1.unmarshal(0))
+            .hasMessage("AvroTest:0.0.1: object \"0\" of type \"java.lang.Integer\" must be assignable to "
+                + "\"java.lang.Boolean\" or be a Json string representation of it for "
+                + "Avro unmarshalling");
     }
 
     /**
@@ -155,13 +136,9 @@ public class AvroSchemaHelperUnmarshalTest {
         final SchemaHelper schemaHelper2 = new SchemaHelperFactory().createSchemaHelper(testKey,
                         avroIntSchema.getKey());
 
-        try {
-            schemaHelper2.createNewInstance();
-            fail("test should throw an exception here");
-        } catch (final Exception e) {
-            assertEquals("AvroTest:0.0.1: could not create an instance of class \"java.lang.Integer\" "
-                            + "using the default constructor \"Integer()\"", e.getMessage());
-        }
+        assertThatThrownBy(schemaHelper2::createNewInstance)
+            .hasMessage("AvroTest:0.0.1: could not create an instance of class \"java.lang.Integer\" "
+                + "using the default constructor \"Integer()\"");
         assertEquals(123, schemaHelper2.createNewInstance("123"));
 
         assertEquals(0, schemaHelper2.unmarshal("0"));
@@ -171,27 +148,15 @@ public class AvroSchemaHelperUnmarshalTest {
         assertEquals(-1, schemaHelper2.unmarshal("-1.23"));
         assertEquals(2147483647, schemaHelper2.unmarshal("2147483647"));
         assertEquals(-2147483648, schemaHelper2.unmarshal("-2147483648"));
-        try {
-            schemaHelper2.unmarshal("2147483648");
-            fail("Test should throw an exception here");
-        } catch (final Exception e) {
-            assertTrue(e.getMessage().startsWith("AvroTest:0.0.1: object \"2147483648\" Avro unmarshalling failed: "
-                            + "Numeric value (2147483648) out of range of int"));
-        }
-        try {
-            schemaHelper2.unmarshal("-2147483649");
-            fail("Test should throw an exception here");
-        } catch (final Exception e) {
-            assertTrue(e.getMessage().startsWith("AvroTest:0.0.1: object \"-2147483649\" Avro unmarshalling failed: "
-                            + "Numeric value (-2147483649) out of range of int"));
-        }
-        try {
-            schemaHelper2.unmarshal(null);
-            fail("Test should throw an exception here");
-        } catch (final Exception e) {
-            assertTrue(e.getMessage().equals("AvroTest:0.0.1: object \"null\" Avro unmarshalling failed: "
-                            + "String to read from cannot be null!"));
-        }
+        assertThatThrownBy(() -> schemaHelper2.unmarshal("2147483648"))
+            .hasMessageStartingWith("AvroTest:0.0.1: object \"2147483648\" Avro unmarshalling failed: "
+                + "Numeric value (2147483648) out of range of int");
+        assertThatThrownBy(() -> schemaHelper2.unmarshal("-2147483649"))
+            .hasMessageStartingWith("AvroTest:0.0.1: object \"-2147483649\" Avro unmarshalling failed: "
+                + "Numeric value (-2147483649) out of range of int");
+        assertThatThrownBy(() -> schemaHelper2.unmarshal(null))
+            .hasMessage("AvroTest:0.0.1: object \"null\" Avro unmarshalling failed: "
+                + "String to read from cannot be null!");
     }
 
     /**
@@ -206,13 +171,9 @@ public class AvroSchemaHelperUnmarshalTest {
         final SchemaHelper schemaHelper3 = new SchemaHelperFactory().createSchemaHelper(testKey,
                         avroLongSchema.getKey());
 
-        try {
-            schemaHelper3.createNewInstance();
-            fail("test should throw an exception here");
-        } catch (final Exception e) {
-            assertEquals("AvroTest:0.0.1: could not create an instance of class \"java.lang.Long\" "
-                            + "using the default constructor \"Long()\"", e.getMessage());
-        }
+        assertThatThrownBy(schemaHelper3::createNewInstance)
+            .hasMessage("AvroTest:0.0.1: could not create an instance of class \"java.lang.Long\" "
+                + "using the default constructor \"Long()\"");
         assertEquals(123456789L, schemaHelper3.createNewInstance("123456789"));
 
         assertEquals(0L, schemaHelper3.unmarshal("0"));
@@ -222,36 +183,18 @@ public class AvroSchemaHelperUnmarshalTest {
         assertEquals(-1L, schemaHelper3.unmarshal("-1.23"));
         assertEquals(9223372036854775807L, schemaHelper3.unmarshal("9223372036854775807"));
         assertEquals(-9223372036854775808L, schemaHelper3.unmarshal("-9223372036854775808"));
-        try {
-            schemaHelper3.unmarshal("9223372036854775808");
-            fail("Test should throw an exception here");
-        } catch (final Exception e) {
-            assertTrue(e.getMessage()
-                            .startsWith("AvroTest:0.0.1: object \"9223372036854775808\" Avro unmarshalling failed: "
-                                            + "Numeric value (9223372036854775808) out of range of long"));
-        }
-        try {
-            schemaHelper3.unmarshal("-9223372036854775809");
-            fail("Test should throw an exception here");
-        } catch (final Exception e) {
-            assertTrue(e.getMessage()
-                            .startsWith("AvroTest:0.0.1: object \"-9223372036854775809\" Avro unmarshalling failed: "
-                                            + "Numeric value (-9223372036854775809) out of range of long"));
-        }
-        try {
-            schemaHelper3.unmarshal("\"Hello\"");
-            fail("Test should throw an exception here");
-        } catch (final Exception e) {
-            assertTrue(e.getMessage().equals("AvroTest:0.0.1: object \"\"Hello\"\" Avro unmarshalling failed: "
-                            + "Expected long. Got VALUE_STRING"));
-        }
-        try {
-            schemaHelper3.unmarshal(null);
-            fail("Test should throw an exception here");
-        } catch (final Exception e) {
-            assertTrue(e.getMessage().equals("AvroTest:0.0.1: object \"null\" Avro unmarshalling failed: "
-                            + "String to read from cannot be null!"));
-        }
+        assertThatThrownBy(() -> schemaHelper3.unmarshal("9223372036854775808"))
+            .hasMessageStartingWith("AvroTest:0.0.1: object \"9223372036854775808\" Avro unmarshalling failed: "
+                + "Numeric value (9223372036854775808) out of range of long");
+        assertThatThrownBy(() -> schemaHelper3.unmarshal("-9223372036854775809"))
+            .hasMessageStartingWith("AvroTest:0.0.1: object \"-9223372036854775809\" Avro unmarshalling failed: "
+                + "Numeric value (-9223372036854775809) out of range of long");
+        assertThatThrownBy(() -> schemaHelper3.unmarshal("\"Hello\""))
+            .hasMessage("AvroTest:0.0.1: object \"\"Hello\"\" Avro unmarshalling failed: "
+                + "Expected long. Got VALUE_STRING");
+        assertThatThrownBy(() -> schemaHelper3.unmarshal(null))
+            .hasMessage("AvroTest:0.0.1: object \"null\" Avro unmarshalling failed: "
+                + "String to read from cannot be null!");
     }
 
     /**
@@ -266,13 +209,9 @@ public class AvroSchemaHelperUnmarshalTest {
         final SchemaHelper schemaHelper4 = new SchemaHelperFactory().createSchemaHelper(testKey,
                         avroFloatSchema.getKey());
 
-        try {
-            schemaHelper4.createNewInstance();
-            fail("test should throw an exception here");
-        } catch (final Exception e) {
-            assertEquals("AvroTest:0.0.1: could not create an instance of class \"java.lang.Float\" "
-                            + "using the default constructor \"Float()\"", e.getMessage());
-        }
+        assertThatThrownBy(schemaHelper4::createNewInstance)
+            .hasMessage("AvroTest:0.0.1: could not create an instance of class \"java.lang.Float\" "
+                + "using the default constructor \"Float()\"");
         assertEquals(1.2345F, schemaHelper4.createNewInstance("1.2345"));
 
         assertEquals(0.0F, schemaHelper4.unmarshal("0"));
@@ -284,20 +223,12 @@ public class AvroSchemaHelperUnmarshalTest {
         assertEquals(-9.223372E18F, schemaHelper4.unmarshal("-9223372036854775808"));
         assertEquals(9.223372E18F, schemaHelper4.unmarshal("9223372036854775808"));
         assertEquals(-9.223372E18F, schemaHelper4.unmarshal("-9223372036854775809"));
-        try {
-            schemaHelper4.unmarshal("\"Hello\"");
-            fail("Test should throw an exception here");
-        } catch (final Exception e) {
-            assertTrue(e.getMessage().equals("AvroTest:0.0.1: object \"\"Hello\"\" Avro unmarshalling failed: "
-                            + "Expected float. Got VALUE_STRING"));
-        }
-        try {
-            schemaHelper4.unmarshal(null);
-            fail("Test should throw an exception here");
-        } catch (final Exception e) {
-            assertTrue(e.getMessage().equals("AvroTest:0.0.1: object \"null\" Avro unmarshalling failed: "
-                            + "String to read from cannot be null!"));
-        }
+        assertThatThrownBy(() -> schemaHelper4.unmarshal("\"Hello\""))
+            .hasMessage("AvroTest:0.0.1: object \"\"Hello\"\" Avro unmarshalling failed: "
+                + "Expected float. Got VALUE_STRING");
+        assertThatThrownBy(() -> schemaHelper4.unmarshal(null))
+            .hasMessage("AvroTest:0.0.1: object \"null\" Avro unmarshalling failed: "
+                + "String to read from cannot be null!");
     }
 
     /**
@@ -312,13 +243,9 @@ public class AvroSchemaHelperUnmarshalTest {
         final SchemaHelper schemaHelper5 = new SchemaHelperFactory().createSchemaHelper(testKey,
                         avroDoubleSchema.getKey());
 
-        try {
-            schemaHelper5.createNewInstance();
-            fail("test should throw an exception here");
-        } catch (final Exception e) {
-            assertEquals("AvroTest:0.0.1: could not create an instance of class \"java.lang.Double\" "
-                            + "using the default constructor \"Double()\"", e.getMessage());
-        }
+        assertThatThrownBy(schemaHelper5::createNewInstance)
+            .hasMessage("AvroTest:0.0.1: could not create an instance of class \"java.lang.Double\" "
+                + "using the default constructor \"Double()\"");
         assertEquals(1.2345E06, schemaHelper5.createNewInstance("1.2345E06"));
 
         assertEquals(0.0, schemaHelper5.unmarshal("0"));
@@ -330,20 +257,12 @@ public class AvroSchemaHelperUnmarshalTest {
         assertEquals(-9.223372036854776E18, schemaHelper5.unmarshal("-9223372036854775808"));
         assertEquals(9.223372036854776E18, schemaHelper5.unmarshal("9223372036854775808"));
         assertEquals(-9.223372036854776E18, schemaHelper5.unmarshal("-9223372036854775809"));
-        try {
-            schemaHelper5.unmarshal("\"Hello\"");
-            fail("Test should throw an exception here");
-        } catch (final Exception e) {
-            assertTrue(e.getMessage().equals("AvroTest:0.0.1: object \"\"Hello\"\" Avro unmarshalling failed: "
-                            + "Expected double. Got VALUE_STRING"));
-        }
-        try {
-            schemaHelper5.unmarshal(null);
-            fail("Test should throw an exception here");
-        } catch (final Exception e) {
-            assertTrue(e.getMessage().equals("AvroTest:0.0.1: object \"null\" Avro unmarshalling failed: "
-                            + "String to read from cannot be null!"));
-        }
+        assertThatThrownBy(() -> schemaHelper5.unmarshal("\"Hello\""))
+            .hasMessage("AvroTest:0.0.1: object \"\"Hello\"\" Avro unmarshalling failed: "
+                + "Expected double. Got VALUE_STRING");
+        assertThatThrownBy(() -> schemaHelper5.unmarshal(null))
+            .hasMessage("AvroTest:0.0.1: object \"null\" Avro unmarshalling failed: "
+                + "String to read from cannot be null!");
     }
 
     /**
@@ -372,13 +291,9 @@ public class AvroSchemaHelperUnmarshalTest {
         assertEquals("-9223372036854775809", schemaHelper7.unmarshal("-9223372036854775809"));
         assertEquals("Hello", schemaHelper7.unmarshal("Hello"));
         assertEquals("Hello", schemaHelper7.unmarshal(new Utf8("Hello")));
-        try {
-            schemaHelper7.unmarshal(null);
-            fail("Test should throw an exception here");
-        } catch (final Exception e) {
-            assertTrue(e.getMessage().equals("AvroTest:0.0.1: object \"null\" Avro unmarshalling failed: "
-                            + "String to read from cannot be null!"));
-        }
+        assertThatThrownBy(() -> schemaHelper7.unmarshal(null))
+            .hasMessage("AvroTest:0.0.1: object \"null\" Avro unmarshalling failed: "
+                + "String to read from cannot be null!");
     }
 
     /**
@@ -392,13 +307,9 @@ public class AvroSchemaHelperUnmarshalTest {
         schemas.getSchemasMap().put(avroSchema.getKey(), avroSchema);
         final SchemaHelper schemaHelper = new SchemaHelperFactory().createSchemaHelper(testKey, avroSchema.getKey());
 
-        try {
-            schemaHelper.createNewInstance();
-            fail("test should throw an exception here");
-        } catch (final Exception e) {
-            assertEquals("AvroTest:0.0.1: could not create an instance of class \"[Ljava.lang.Byte;\" "
-                            + "using the default constructor \"Byte[]()\"", e.getMessage());
-        }
+        assertThatThrownBy(schemaHelper::createNewInstance)
+            .hasMessage("AvroTest:0.0.1: could not create an instance of class \"[Ljava.lang.Byte;\" "
+                + "using the default constructor \"Byte[]()\"");
         final byte[] newBytes = (byte[]) schemaHelper.createNewInstance("\"hello\"");
         assertEquals(5, newBytes.length);
         assertEquals(104, newBytes[0]);
@@ -407,12 +318,8 @@ public class AvroSchemaHelperUnmarshalTest {
         assertEquals(108, newBytes[3]);
         assertEquals(111, newBytes[4]);
 
-        try {
-            schemaHelper.unmarshal(null);
-            fail("Test should throw an exception here");
-        } catch (final Exception e) {
-            assertTrue(e.getMessage().equals("AvroTest:0.0.1: object \"null\" Avro unmarshalling failed: "
-                            + "String to read from cannot be null!"));
-        }
+        assertThatThrownBy(() -> schemaHelper.unmarshal(null))
+            .hasMessage("AvroTest:0.0.1: object \"null\" Avro unmarshalling failed: "
+                + "String to read from cannot be null!");
     }
 }
diff --git a/plugins/plugins-context/plugins-context-schema/plugins-context-schema-avro/src/test/java/org/onap/policy/apex/plugins/context/schema/avro/AvroSchemaRecordTest.java b/plugins/plugins-context/plugins-context-schema/plugins-context-schema-avro/src/test/java/org/onap/policy/apex/plugins/context/schema/avro/AvroSchemaRecordTest.java
index ca1ac6561..8d85f4ecb 100644
--- a/plugins/plugins-context/plugins-context-schema/plugins-context-schema-avro/src/test/java/org/onap/policy/apex/plugins/context/schema/avro/AvroSchemaRecordTest.java
+++ b/plugins/plugins-context/plugins-context-schema/plugins-context-schema-avro/src/test/java/org/onap/policy/apex/plugins/context/schema/avro/AvroSchemaRecordTest.java
@@ -21,15 +21,14 @@
 
 package org.onap.policy.apex.plugins.context.schema.avro;
 
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
 import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.fail;
 
 import java.io.IOException;
 import org.apache.avro.generic.GenericRecord;
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
-import org.onap.policy.apex.context.ContextRuntimeException;
 import org.onap.policy.apex.context.SchemaHelper;
 import org.onap.policy.apex.context.impl.schema.SchemaHelperFactory;
 import org.onap.policy.apex.context.parameters.ContextParameterConstants;
@@ -149,13 +148,8 @@ public class AvroSchemaRecordTest {
         subRecord = (GenericRecord) schemaHelper.createNewSubInstance("EmailAddress");
         assertEquals(null, subRecord.get("address"));
 
-        try {
-            subRecord = (GenericRecord) schemaHelper.createNewSubInstance("IDontExist");
-            fail("test should throw an exception here");
-        } catch (ContextRuntimeException cre) {
-            assertEquals("AvroTest:0.0.1: the schema \"User\" does not have a subtype of type \"IDontExist\"",
-                    cre.getMessage());
-        }
+        assertThatThrownBy(() -> schemaHelper.createNewSubInstance("IDontExist"))
+            .hasMessage("AvroTest:0.0.1: the schema \"User\" does not have a subtype of type \"IDontExist\"");
     }
 
     /**
diff --git a/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/test/java/org/onap/policy/apex/plugins/event/carrier/restclient/ApexRestClientConusmerTest.java b/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/test/java/org/onap/policy/apex/plugins/event/carrier/restclient/ApexRestClientConusmerTest.java
index ea5e80161..e506513a8 100644
--- a/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/test/java/org/onap/policy/apex/plugins/event/carrier/restclient/ApexRestClientConusmerTest.java
+++ b/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/test/java/org/onap/policy/apex/plugins/event/carrier/restclient/ApexRestClientConusmerTest.java
@@ -21,6 +21,7 @@
 
 package org.onap.policy.apex.plugins.event.carrier.restclient;
 
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
 import static org.awaitility.Awaitility.await;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
@@ -76,27 +77,19 @@ public class ApexRestClientConusmerTest {
 
         EventHandlerParameters consumerParameters = new EventHandlerParameters();
         SupportApexEventReceiver incomingEventReceiver = new SupportApexEventReceiver();
-        try {
-            arcc.init("RestClientConsumer", consumerParameters, incomingEventReceiver);
-            fail("test should throw an exception here");
-        } catch (ApexEventException e) {
-            assertEquals(
-                "specified consumer properties are not applicable to REST client consumer (RestClientConsumer)",
-                e.getMessage());
-        }
+        assertThatThrownBy(() -> arcc.init("RestClientConsumer", consumerParameters, incomingEventReceiver))
+            .hasMessageContaining("specified consumer properties are not applicable to REST client"
+                + " consumer (RestClientConsumer)");
 
         RestClientCarrierTechnologyParameters rcctp = new RestClientCarrierTechnologyParameters();
         consumerParameters.setCarrierTechnologyParameters(rcctp);
         rcctp.setHttpMethod(RestClientCarrierTechnologyParameters.HttpMethod.DELETE);
-        try {
+        assertThatThrownBy(() -> {
             arcc.init("RestClientConsumer", consumerParameters, incomingEventReceiver);
-            assertEquals(RestClientCarrierTechnologyParameters.HttpMethod.GET, rcctp.getHttpMethod());
-            fail("test should throw an exception here");
-        } catch (ApexEventException e) {
-            assertEquals("specified HTTP method of \"DELETE\" is invalid, only HTTP method \"GET\" is supported "
-                + "for event reception on REST client consumer (RestClientConsumer)", e.getMessage());
-        }
+        }).hasMessageContaining("specified HTTP method of \"DELETE\" is invalid, only HTTP method \"GET\" is "
+                    + "supported for event reception on REST client consumer (RestClientConsumer)");
 
+        assertEquals(RestClientCarrierTechnologyParameters.HttpMethod.DELETE, rcctp.getHttpMethod());
         rcctp.setHttpMethod(null);
         rcctp.setHttpCodeFilter("zzz");
 
@@ -174,7 +167,7 @@ public class ApexRestClientConusmerTest {
     }
 
     @Test
-    public void testApexRestClientConsumerJsonError() {
+    public void testApexRestClientConsumerJsonError() throws ApexEventException {
         MockitoAnnotations.initMocks(this);
 
         ApexRestClientConsumer arcc = new ApexRestClientConsumer();
@@ -186,18 +179,13 @@ public class ApexRestClientConusmerTest {
         consumerParameters.setCarrierTechnologyParameters(rcctp);
         rcctp.setHttpCodeFilter("[1-5][0][0-5]");
 
-        try {
-            arcc.init("RestClientConsumer", consumerParameters, incomingEventReceiver);
-            assertEquals(RestClientCarrierTechnologyParameters.HttpMethod.GET, rcctp.getHttpMethod());
-
-            assertEquals("RestClientConsumer", arcc.getName());
+        arcc.init("RestClientConsumer", consumerParameters, incomingEventReceiver);
+        assertEquals(RestClientCarrierTechnologyParameters.HttpMethod.GET, rcctp.getHttpMethod());
+        assertEquals("RestClientConsumer", arcc.getName());
 
-            arcc.setPeeredReference(EventHandlerPeeredMode.SYNCHRONOUS, null);
+        arcc.setPeeredReference(EventHandlerPeeredMode.SYNCHRONOUS, null);
 
-            assertEquals(null, arcc.getPeeredReference(EventHandlerPeeredMode.SYNCHRONOUS));
-        } catch (ApexEventException e) {
-            fail("test should not throw an exception");
-        }
+        assertEquals(null, arcc.getPeeredReference(EventHandlerPeeredMode.SYNCHRONOUS));
 
         rcctp.setUrl("http://some.place.that.does.not/exist");
         Mockito.doReturn(Response.Status.OK.getStatusCode()).when(responseMock).getStatus();
@@ -341,14 +329,8 @@ public class ApexRestClientConusmerTest {
         ByteArrayOutputStream outContent = new ByteArrayOutputStream();
         System.setOut(new PrintStream(outContent));
 
-        try {
-            // We have not set the URL, this test should not receive any events
-            arcc.start();
-            await().atMost(200, TimeUnit.MILLISECONDS).until(() -> incomingEventReceiver.getEventCount() == 0);
-            arcc.stop();
-        } catch (Exception e) {
-            // test invalid status code
-            assertEquals("received an invalid status code \"200\"", e.getMessage());
-        }
+        arcc.start();
+        await().atMost(200, TimeUnit.MILLISECONDS).until(() -> incomingEventReceiver.getEventCount() == 0);
+        arcc.stop();
     }
 }
diff --git a/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/test/java/org/onap/policy/apex/plugins/event/carrier/restclient/ApexRestClientProducerTest.java b/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/test/java/org/onap/policy/apex/plugins/event/carrier/restclient/ApexRestClientProducerTest.java
index 0ee8fe6ad..a4ef6e38e 100644
--- a/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/test/java/org/onap/policy/apex/plugins/event/carrier/restclient/ApexRestClientProducerTest.java
+++ b/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/test/java/org/onap/policy/apex/plugins/event/carrier/restclient/ApexRestClientProducerTest.java
@@ -21,9 +21,9 @@
 
 package org.onap.policy.apex.plugins.event.carrier.restclient;
 
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
-import static org.junit.Assert.fail;
 
 import java.util.Properties;
 import javax.ws.rs.client.Client;
@@ -64,29 +64,18 @@ public class ApexRestClientProducerTest {
         assertNotNull(arcp);
 
         EventHandlerParameters producerParameters = new EventHandlerParameters();
-        try {
-            arcp.init("RestClientProducer", producerParameters);
-            fail("test should throw an exception here");
-        } catch (ApexEventException e) {
-            assertEquals(
-                    "specified producer properties are not applicable to REST client producer (RestClientProducer)",
-                    e.getMessage());
-        }
+        assertThatThrownBy(() -> arcp.init("RestClientProducer", producerParameters))
+            .hasMessage("specified producer properties are not applicable to REST client producer"
+                + " (RestClientProducer)");
 
         RestClientCarrierTechnologyParameters rcctp = new RestClientCarrierTechnologyParameters();
         producerParameters.setCarrierTechnologyParameters(rcctp);
         rcctp.setHttpMethod(RestClientCarrierTechnologyParameters.HttpMethod.DELETE);
-        try {
-            arcp.init("RestClientConsumer", producerParameters);
-            assertEquals(RestClientCarrierTechnologyParameters.HttpMethod.GET, rcctp.getHttpMethod());
-            fail("test should throw an exception here");
-        } catch (ApexEventException e) {
-            assertEquals(
-                    "specified HTTP method of \"DELETE\" is invalid, only HTTP methods \"POST\" and \"PUT\" "
-                            + "are supported for event sending on REST client producer (RestClientConsumer)",
-                    e.getMessage());
-        }
+        assertThatThrownBy(() -> arcp.init("RestClientConsumer", producerParameters))
+            .hasMessage("specified HTTP method of \"DELETE\" is invalid, only HTTP methods \"POST\""
+                + " and \"PUT\" are supported for event sending on REST client producer (RestClientConsumer)");
 
+        assertEquals(RestClientCarrierTechnologyParameters.HttpMethod.DELETE, rcctp.getHttpMethod());
         rcctp.setHttpMethod(null);
         arcp.init("RestClientConsumer", producerParameters);
         assertEquals(RestClientCarrierTechnologyParameters.HttpMethod.POST, rcctp.getHttpMethod());
@@ -168,15 +157,12 @@ public class ApexRestClientProducerTest {
         rcctp.setUrl("http://some.place2.that.{key}.not/{tag}and.again.{tag}");
         Properties properties = new Properties();
         properties.put("tag", "exist");
-        try {
+        assertThatThrownBy(() -> {
             arcp.sendEvent(123, properties, "EventName", "This is an Event");
             arcp.stop();
-            fail("test should throw an exception");
-        } catch (Exception e) {
-            assertEquals("key \"key\" specified on url "
-                    + "\"http://some.place2.that.{key}.not/{tag}and.again.{tag}\" not found "
-                    + "in execution properties passed by the current policy", e.getMessage());
-        }
+        }).hasMessageContaining("key \"key\" specified on url "
+                + "\"http://some.place2.that.{key}.not/{tag}and.again.{tag}\" not found "
+                + "in execution properties passed by the current policy");
     }
 
     @Test
@@ -303,14 +289,8 @@ public class ApexRestClientProducerTest {
         Mockito.doReturn(targetMock).when(httpClientMock).target(rcctp.getUrl());
         arcp.setClient(httpClientMock);
 
-        try {
-            arcp.sendEvent(123, null, "EventName", "This is an Event");
-            fail("test should throw an exception here");
-        } catch (Exception e) {
-            assertEquals(
-                    "send of event to URL \"http://some.place.that.does.not/exist\" using HTTP \"POST\" "
-                            + "failed with status code 400 and message \"null\", event:\n" + "This is an Event",
-                    e.getMessage());
-        }
+        assertThatThrownBy(() -> arcp.sendEvent(123, null, "EventName", "This is an Event"))
+            .hasMessageContaining("send of event to URL \"http://some.place.that.does.not/exist\" using HTTP \"POST\" "
+                + "failed with status code 400 and message \"null\", event:\n" + "This is an Event");
     }
 }
\ No newline at end of file
diff --git a/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/test/java/org/onap/policy/apex/plugins/event/carrier/restclient/RestClientCarrierTechnologyParametersTest.java b/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/test/java/org/onap/policy/apex/plugins/event/carrier/restclient/RestClientCarrierTechnologyParametersTest.java
index 42a9c0f73..f704ad3ec 100644
--- a/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/test/java/org/onap/policy/apex/plugins/event/carrier/restclient/RestClientCarrierTechnologyParametersTest.java
+++ b/plugins/plugins-event/plugins-event-carrier/plugins-event-carrier-restclient/src/test/java/org/onap/policy/apex/plugins/event/carrier/restclient/RestClientCarrierTechnologyParametersTest.java
@@ -22,10 +22,10 @@
 package org.onap.policy.apex.plugins.event.carrier.restclient;
 
 import static org.assertj.core.api.Assertions.assertThatCode;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
 import static org.junit.Assert.assertTrue;
-import static org.junit.Assert.fail;
 
 import java.util.Set;
 import org.junit.Test;
@@ -45,13 +45,8 @@ public class RestClientCarrierTechnologyParametersTest {
         arguments.setConfigurationFilePath("src/test/resources/prodcons/RESTClientWithHTTPHeaderBadList.json");
         arguments.setRelativeFileRoot(".");
 
-        try {
-            new ApexParameterHandler().getParameters(arguments);
-            fail("test should throw an exception here");
-        } catch (ParameterException pe) {
-            assertTrue(pe.getMessage().contains("HTTP header array entry is null\n    parameter"));
-            assertTrue(pe.getMessage().trim().endsWith("HTTP header array entry is null"));
-        }
+        assertThatThrownBy(() -> new ApexParameterHandler().getParameters(arguments))
+            .hasMessageContaining("HTTP header array entry is null\n    parameter");
     }
 
     @Test
@@ -60,15 +55,9 @@ public class RestClientCarrierTechnologyParametersTest {
         arguments.setConfigurationFilePath("src/test/resources/prodcons/RESTClientWithHTTPHeaderNotKvPairs.json");
         arguments.setRelativeFileRoot(".");
 
-        try {
-            new ApexParameterHandler().getParameters(arguments);
-            fail("test should throw an exception here");
-        } catch (ParameterException pe) {
-            assertTrue(pe.getMessage()
-                    .contains("HTTP header array entries must have one key and one value: [aaa, bbb, ccc]"));
-            assertTrue(pe.getMessage().trim()
-                    .endsWith("HTTP header array entries must have one key and one value: [aaa]"));
-        }
+        assertThatThrownBy(() -> new ApexParameterHandler().getParameters(arguments))
+            .hasMessageContaining("HTTP header array entries must have one key and one value: [aaa, bbb, ccc]")
+            .hasMessageEndingWith("HTTP header array entries must have one key and one value: [aaa]\n");
     }
 
     @Test
@@ -77,13 +66,9 @@ public class RestClientCarrierTechnologyParametersTest {
         arguments.setConfigurationFilePath("src/test/resources/prodcons/RESTClientWithHTTPHeaderNulls.json");
         arguments.setRelativeFileRoot(".");
 
-        try {
-            new ApexParameterHandler().getParameters(arguments);
-            fail("test should throw an exception here");
-        } catch (ParameterException pe) {
-            assertTrue(pe.getMessage().contains("HTTP header key is null or blank: [null, bbb]"));
-            assertTrue(pe.getMessage().trim().endsWith("HTTP header value is null or blank: [ccc, null]"));
-        }
+        assertThatThrownBy(() -> new ApexParameterHandler().getParameters(arguments))
+            .hasMessageContaining("HTTP header key is null or blank: [null, bbb]")
+            .hasMessageEndingWith("HTTP header value is null or blank: [ccc, null]\n");
     }
 
     @Test
diff --git a/plugins/plugins-event/plugins-event-protocol/plugins-event-protocol-yaml/src/test/java/org/onap/policy/apex/plugins/event/protocol/yaml/YamlEventProtocolTest.java b/plugins/plugins-event/plugins-event-protocol/plugins-event-protocol-yaml/src/test/java/org/onap/policy/apex/plugins/event/protocol/yaml/YamlEventProtocolTest.java
index 3d620ebf4..2fbae65e4 100644
--- a/plugins/plugins-event/plugins-event-protocol/plugins-event-protocol-yaml/src/test/java/org/onap/policy/apex/plugins/event/protocol/yaml/YamlEventProtocolTest.java
+++ b/plugins/plugins-event/plugins-event-protocol/plugins-event-protocol-yaml/src/test/java/org/onap/policy/apex/plugins/event/protocol/yaml/YamlEventProtocolTest.java
@@ -21,8 +21,8 @@
 
 package org.onap.policy.apex.plugins.event.protocol.yaml;
 
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
 import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.fail;
 
 import java.io.File;
 import java.io.FileInputStream;
@@ -215,13 +215,8 @@ public class YamlEventProtocolTest {
      */
     @Test
     public void testYamlProcessing() throws ApexEventException, IOException {
-        try {
-            testYamlDecodeEncode("TestEvent0", 1, 0, "Empty0");
-            fail("test should fail here");
-        } catch (ApexEventException e) {
-            assertEquals("event processing failed, event is null", e.getMessage());
-        }
-
+        assertThatThrownBy(() -> testYamlDecodeEncode("TestEvent0", 1, 0, "Empty0"))
+            .hasMessage("event processing failed, event is null");
         testYamlDecodeEncode("TestEvent0", 1, 0, "Empty1");
         testYamlDecodeEncode("TestEvent1", 1, 1, "Collection0");
         testYamlDecodeEncode("TestEvent2", 1, 3, "Collection1");
diff --git a/plugins/plugins-event/plugins-event-protocol/plugins-event-protocol-yaml/src/test/java/org/onap/policy/apex/plugins/event/protocol/yaml/YamlPluginStabilityTest.java b/plugins/plugins-event/plugins-event-protocol/plugins-event-protocol-yaml/src/test/java/org/onap/policy/apex/plugins/event/protocol/yaml/YamlPluginStabilityTest.java
index 6f82c7dfd..398bddb16 100644
--- a/plugins/plugins-event/plugins-event-protocol/plugins-event-protocol-yaml/src/test/java/org/onap/policy/apex/plugins/event/protocol/yaml/YamlPluginStabilityTest.java
+++ b/plugins/plugins-event/plugins-event-protocol/plugins-event-protocol-yaml/src/test/java/org/onap/policy/apex/plugins/event/protocol/yaml/YamlPluginStabilityTest.java
@@ -1,6 +1,7 @@
 /*-
  * ============LICENSE_START=======================================================
  *  Copyright (C) 2018 Ericsson. All rights reserved.
+ *  Modifications Copyright (C) 2020 Nordix Foundation
  * ================================================================================
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -20,9 +21,9 @@
 
 package org.onap.policy.apex.plugins.event.protocol.yaml;
 
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
-import static org.junit.Assert.fail;
 
 import java.io.IOException;
 import java.util.List;
@@ -41,7 +42,6 @@ import org.onap.policy.apex.model.eventmodel.concepts.AxEvents;
 import org.onap.policy.apex.model.eventmodel.concepts.AxField;
 import org.onap.policy.apex.service.engine.event.ApexEvent;
 import org.onap.policy.apex.service.engine.event.ApexEventException;
-import org.onap.policy.apex.service.engine.event.ApexEventRuntimeException;
 import org.onap.policy.common.parameters.ParameterService;
 
 /**
@@ -112,52 +112,22 @@ public class YamlPluginStabilityTest {
     public void testStability() throws ApexEventException {
         Apex2YamlEventConverter converter = new Apex2YamlEventConverter();
 
-        try {
-            converter.init(null);
-            fail("this test should throw an exception");
-        } catch (ApexEventRuntimeException e) {
-            assertEquals("specified consumer properties are not applicable to the YAML event protocol", e.getMessage());
-        }
-
+        assertThatThrownBy(() -> converter.init(null))
+            .hasMessage("specified consumer properties are not applicable to the YAML event protocol");
         YamlEventProtocolParameters pars = new YamlEventProtocolParameters();
         converter.init(pars);
 
-        try {
-            converter.toApexEvent("NonExistantEvent", "");
-            fail("this test should throw an exception");
-        } catch (ApexEventException e) {
-            assertEquals("Failed to unmarshal YAML event: an event definition for an event named \"NonExistantEvent\"",
-                            e.getMessage().substring(0, 89));
-        }
-
-        try {
-            converter.toApexEvent("TestEvent", null);
-            fail("this test should throw an exception");
-        } catch (ApexEventException e) {
-            assertEquals("event processing failed, event is null", e.getMessage());
-        }
-
-        try {
-            converter.toApexEvent("TestEvent", 1);
-            fail("this test should throw an exception");
-        } catch (ApexEventException e) {
-            assertEquals("error converting event \"1\" to a string", e.getMessage());
-        }
-
-        try {
-            converter.toApexEvent("TestEvent", "");
-            fail("this test should throw an exception");
-        } catch (ApexEventException e) {
-            assertTrue(e.getMessage().contains("Field \"doubleValue\" is missing"));
-        }
-
-        try {
-            converter.fromApexEvent(null);
-            fail("this test should throw an exception");
-        } catch (ApexEventException e) {
-            assertEquals("event processing failed, Apex event is null", e.getMessage());
-        }
-
+        assertThatThrownBy(() -> converter.toApexEvent("NonExistantEvent", ""))
+            .hasMessageContaining("Failed to unmarshal YAML event: an event definition for an event named "
+                    + "\"NonExistantEvent\"");
+        assertThatThrownBy(() -> converter.toApexEvent("TestEvent", null))
+            .hasMessage("event processing failed, event is null");
+        assertThatThrownBy(() -> converter.toApexEvent("TestEvent", 1))
+            .hasMessage("error converting event \"1\" to a string");
+        assertThatThrownBy(() -> converter.toApexEvent("TestEvent", ""))
+            .hasMessageContaining("Field \"doubleValue\" is missing");
+        assertThatThrownBy(() -> converter.fromApexEvent(null))
+            .hasMessage("event processing failed, Apex event is null");
         ApexEvent apexEvent = new ApexEvent(testEvent.getKey().getName(), testEvent.getKey().getVersion(),
                         testEvent.getNameSpace(), testEvent.getSource(), testEvent.getTarget());
         apexEvent.put("doubleValue", 123.45);
@@ -169,31 +139,15 @@ public class YamlPluginStabilityTest {
         assertTrue(yamlString.contains("my wonderful exception message"));
 
         apexEvent.remove("intValue");
-        try {
-            yamlString = (String) converter.fromApexEvent(apexEvent);
-            fail("this test should throw an exception");
-        } catch (ApexEventRuntimeException e) {
-            assertEquals("error parsing TestEvent:0.0.1 event to Json. Field \"intValue\" is missing",
-                            e.getMessage().substring(0, 72));
-        }
-
-        try {
-            converter.toApexEvent(null, "");
-            fail("this test should throw an exception");
-        } catch (ApexEventException e) {
-            assertEquals("Failed to unmarshal YAML event: event received without mandatory parameter \"name\"",
-                            e.getMessage().substring(0, 81));
-        }
-
+        assertThatThrownBy(() -> converter.fromApexEvent(apexEvent))
+            .hasMessageContaining("error parsing TestEvent:0.0.1 event to Json. Field \"intValue\" is missing");
+        assertThatThrownBy(() -> converter.toApexEvent(null, ""))
+            .hasMessageContaining("Failed to unmarshal YAML event: event received without mandatory parameter"
+                    + " \"name\"");
         pars.setNameAlias("TheNameField");
-        try {
-            converter.toApexEvent(null, "");
-            fail("this test should throw an exception");
-        } catch (ApexEventException e) {
-            assertEquals("Failed to unmarshal YAML event: event received without mandatory parameter \"name\"",
-                            e.getMessage().substring(0, 81));
-        }
-
+        assertThatThrownBy(() -> converter.toApexEvent(null, ""))
+            .hasMessageContaining("Failed to unmarshal YAML event: event received without mandatory parameter"
+                    + " \"name\"");
         apexEvent.put("intValue", 123);
 
         apexEvent.remove("stringValue");
@@ -228,14 +182,9 @@ public class YamlPluginStabilityTest {
         yamlInputString = "doubleValue: 123.45\n" + "intValue: 123\n" + "stringValue: org.some.other.namespace";
         pars.setVersionAlias(null);
         pars.setNameSpaceAlias("stringValue");
-        try {
-            converter.toApexEvent("TestEvent", yamlInputString);
-            fail("this test should throw an exception");
-        } catch (ApexEventException e) {
-            assertEquals("Failed to unmarshal YAML event: namespace \"org.some.other.namespace\" on event",
-                            e.getMessage().substring(0, 77));
-        }
-
+        final String yamlInputStringCopy = yamlInputString;
+        assertThatThrownBy(() -> converter.toApexEvent("TestEvent", yamlInputStringCopy))
+            .hasMessageContaining("Failed to unmarshal YAML event: namespace \"org.some.other.namespace\" on event");
         yamlInputString = "doubleValue: 123.45\n" + "intValue: 123\n"
                         + "stringValue: org.onap.policy.apex.plugins.event.protocol.yaml";
         eventList = converter.toApexEvent("TestEvent", yamlInputString);
@@ -257,21 +206,12 @@ public class YamlPluginStabilityTest {
         yamlInputString = "doubleValue: 123.45\n" + "intValue: 123\n" + "stringValue: MyString";
         pars.setSourceAlias(null);
         pars.setTargetAlias("intValue");
-        try {
-            converter.toApexEvent("TestEvent", yamlInputString);
-            fail("this test should throw an exception");
-        } catch (ApexEventException e) {
-            assertEquals("Failed to unmarshal YAML event: field \"target\" with type \"java.lang.Integer\"",
-                            e.getMessage().substring(0, 76));
-        }
+        assertThatThrownBy(() -> converter.toApexEvent("TestEvent", yamlInputStringCopy))
+            .hasMessageContaining("Failed to unmarshal YAML event: field \"target\" with type \"java.lang.Integer\"");
         pars.setTargetAlias(null);
 
-        yamlInputString = "doubleValue: 123.45\n" + "intValue: ~\n" + "stringValue: MyString";
-        try {
-            converter.toApexEvent("TestEvent", yamlInputString);
-            fail("this test should throw an exception");
-        } catch (ApexEventException e) {
-            assertTrue(e.getMessage().contains("mandatory field \"intValue\" is missing"));
-        }
+        assertThatThrownBy(() -> converter.toApexEvent("TestEvent", "doubleValue: 123.45\n" + "intValue: ~\n"
+            + "stringValue: MyString"))
+            .hasMessageContaining("mandatory field \"intValue\" is missing");
     }
 }
diff --git a/plugins/plugins-executor/plugins-executor-java/src/test/java/org/onap/policy/apex/plugins/executor/java/JavaStateFinalizerExecutorTest.java b/plugins/plugins-executor/plugins-executor-java/src/test/java/org/onap/policy/apex/plugins/executor/java/JavaStateFinalizerExecutorTest.java
index 106467ac4..a1c296436 100644
--- a/plugins/plugins-executor/plugins-executor-java/src/test/java/org/onap/policy/apex/plugins/executor/java/JavaStateFinalizerExecutorTest.java
+++ b/plugins/plugins-executor/plugins-executor-java/src/test/java/org/onap/policy/apex/plugins/executor/java/JavaStateFinalizerExecutorTest.java
@@ -1,6 +1,7 @@
 /*-
  * ============LICENSE_START=======================================================
  *  Copyright (C) 2018 Ericsson. All rights reserved.
+ *  Modifications Copyright (C) 2020 Nordix Foundation
  * ================================================================================
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -20,9 +21,9 @@
 
 package org.onap.policy.apex.plugins.executor.java;
 
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertNotNull;
-import static org.junit.Assert.fail;
 
 import java.util.Properties;
 import org.junit.After;
@@ -75,88 +76,48 @@ public class JavaStateFinalizerExecutorTest {
     }
 
     @Test
-    public void testJavaStateFinalizerExecutor() {
+    public void testJavaStateFinalizerExecutor() throws StateMachineException, ContextException {
         JavaStateFinalizerExecutor jsfe = new JavaStateFinalizerExecutor();
         assertNotNull(jsfe);
 
-        try {
-            jsfe.prepare();
-            fail("test should throw an exception here");
-        } catch (Exception jtseException) {
-            assertEquals(java.lang.NullPointerException.class, jtseException.getClass());
-        }
-
+        assertThatThrownBy(jsfe::prepare).isInstanceOf(java.lang.NullPointerException.class);
         ApexInternalContext internalContext = null;
-        try {
-            internalContext = new ApexInternalContext(new AxPolicyModel());
-        } catch (ContextException e) {
-            fail("test should not throw an exception here");
-        }
+
+        internalContext = new ApexInternalContext(new AxPolicyModel());
 
         StateExecutor parentStateExcutor = null;
-        try {
-            parentStateExcutor = new StateExecutor(new ExecutorFactoryImpl());
-        } catch (StateMachineException e) {
-            fail("test should not throw an exception here");
-        }
+
+        parentStateExcutor = new StateExecutor(new ExecutorFactoryImpl());
 
         AxState state = new AxState();
         parentStateExcutor.setContext(null, state, internalContext);
         AxStateFinalizerLogic stateFinalizerLogic = new AxStateFinalizerLogic();
         jsfe.setContext(parentStateExcutor, stateFinalizerLogic, internalContext);
 
-        try {
-            jsfe.prepare();
-            fail("test should throw an exception here");
-        } catch (Exception jtseException) {
-            assertEquals("instantiation error on Java class \"\"", jtseException.getMessage());
-        }
-
+        assertThatThrownBy(jsfe::prepare)
+            .hasMessage("instantiation error on Java class \"\"");
         stateFinalizerLogic.setLogic("java.lang.String");
 
-        try {
-            jsfe.prepare();
-        } catch (Exception jtseException) {
-            fail("test should not throw an exception here");
-        }
-
-        try {
-            jsfe.execute(-1, new Properties(), null);
-            fail("test should throw an exception here");
-        } catch (Exception jtseException) {
-            assertEquals("state finalizer logic failed to run for state finalizer  \"NULL:0.0.0:NULL:NULL\"",
-                jtseException.getMessage());
-        }
+        jsfe.prepare();
 
+        assertThatThrownBy(() -> jsfe.execute(-1, new Properties(), null))
+            .hasMessage("state finalizer logic failed to run for state finalizer  \"NULL:0.0.0:NULL:NULL\"");
         AxEvent axEvent = new AxEvent(new AxArtifactKey("Event", "0.0.1"));
         EnEvent event = new EnEvent(axEvent);
-        try {
-            jsfe.execute(-1, new Properties(), event);
-            fail("test should throw an exception here");
-        } catch (Exception jtseException) {
-            assertEquals("state finalizer logic failed to run for state finalizer  \"NULL:0.0.0:NULL:NULL\"",
-                jtseException.getMessage());
-        }
-
+        assertThatThrownBy(() -> jsfe.execute(-1, new Properties(), event))
+            .hasMessage("state finalizer logic failed to run for state finalizer  \"NULL:0.0.0:NULL:NULL\"");
         stateFinalizerLogic.setLogic("org.onap.policy.apex.plugins.executor.java.DummyJavaStateFinalizerLogic");
-        try {
-            jsfe.prepare();
+        jsfe.prepare();
+        assertThatThrownBy(() -> {
             jsfe.execute(-1, new Properties(), event);
-            fail("test should throw an exception here");
-        } catch (Exception jtseException) {
-            assertEquals("execute-post: state finalizer logic execution failure on state \"NULL:0.0.0:NULL:NULL\" "
-                + "on finalizer logic NULL:0.0.0:NULL:NULL", jtseException.getMessage());
-        }
-
+        }).hasMessage("execute-post: state finalizer logic execution failure on state "
+                + "\"NULL:0.0.0:NULL:NULL\" on finalizer logic NULL:0.0.0:NULL:NULL");
         state.getStateOutputs().put("SelectedOutputIsMe", null);
-        try {
-            jsfe.prepare();
-            String stateOutput = jsfe.execute(0, new Properties(), event);
-            assertEquals("SelectedOutputIsMe", stateOutput);
-            jsfe.cleanUp();
-        } catch (Exception jtseException) {
-            jtseException.printStackTrace();
-            fail("test should not throw an exception here");
-        }
+
+        jsfe.prepare();
+        String stateOutput = jsfe.execute(0, new Properties(), event);
+        assertEquals("SelectedOutputIsMe", stateOutput);
+        jsfe.cleanUp();
+
     }
 }