Replace try/catch with assertj

Replaced try/catch blocks with assertj assertions in apex-pdp. Last
batch of changes

Issue-ID: POLICY-2451
Change-Id: I39bd02fdbd8389818dcf1b786189c1e344ddcea5
Signed-off-by: waynedunican <wayne.dunican@est.tech>

8 files changed, 174 insertions, 427 deletions

diff --git a/plugins/plugins-executor/plugins-executor-java/src/test/java/org/onap/policy/apex/plugins/executor/java/JavaTaskExecutorTest.java b/plugins/plugins-executor/plugins-executor-java/src/test/java/org/onap/policy/apex/plugins/executor/java/JavaTaskExecutorTest.java
index 8d7cca3aa..7f263245c 100644
--- a/plugins/plugins-executor/plugins-executor-java/src/test/java/org/onap/policy/apex/plugins/executor/java/JavaTaskExecutorTest.java
+++ b/plugins/plugins-executor/plugins-executor-java/src/test/java/org/onap/policy/apex/plugins/executor/java/JavaTaskExecutorTest.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.HashMap;
 import java.util.Map;
@@ -36,6 +37,7 @@ import org.onap.policy.apex.context.parameters.DistributorParameters;
 import org.onap.policy.apex.context.parameters.LockManagerParameters;
 import org.onap.policy.apex.context.parameters.PersistorParameters;
 import org.onap.policy.apex.core.engine.context.ApexInternalContext;
+import org.onap.policy.apex.core.engine.executor.exception.StateMachineException;
 import org.onap.policy.apex.model.policymodel.concepts.AxPolicyModel;
 import org.onap.policy.apex.model.policymodel.concepts.AxTask;
 import org.onap.policy.common.parameters.ParameterService;
@@ -66,73 +68,37 @@ public class JavaTaskExecutorTest {
     }
 
     @Test
-    public void testJavaTaskExecutor() {
+    public void testJavaTaskExecutor() throws ContextException, StateMachineException {
         JavaTaskExecutor jte = new JavaTaskExecutor();
         assertNotNull(jte);
 
-        try {
-            jte.prepare();
-            fail("test should throw an exception here");
-        } catch (Exception jteException) {
-            assertEquals(java.lang.NullPointerException.class, jteException.getClass());
-        }
-
+        assertThatThrownBy(jte::prepare)
+            .isInstanceOf(java.lang.NullPointerException.class);
         AxTask task = new AxTask();
         ApexInternalContext internalContext = null;
-        try {
-            internalContext = new ApexInternalContext(new AxPolicyModel());
-        } catch (ContextException e) {
-            fail("test should not throw an exception here");
-        }
-        jte.setContext(null, task, internalContext);
+        internalContext = new ApexInternalContext(new AxPolicyModel());
 
-        try {
-            jte.prepare();
-            fail("test should throw an exception here");
-        } catch (Exception jteException) {
-            assertEquals("instantiation error on Java class \"\"", jteException.getMessage());
-        }
+        jte.setContext(null, task, internalContext);
 
+        assertThatThrownBy(jte::prepare)
+            .hasMessage("instantiation error on Java class \"\"");
         task.getTaskLogic().setLogic("java.lang.String");
 
-        try {
-            jte.prepare();
-        } catch (Exception jteException) {
-            fail("test should not throw an exception here");
-        }
-
-        try {
-            jte.execute(-1, new Properties(), null);
-            fail("test should throw an exception here");
-        } catch (Exception jteException) {
-            assertEquals(java.lang.NullPointerException.class, jteException.getClass());
-        }
+        jte.prepare();
 
+        assertThatThrownBy(() -> jte.execute(-1, new Properties(), null))
+            .isInstanceOf(java.lang.NullPointerException.class);
         Map<String, Object> incomingParameters = new HashMap<>();
-        try {
-            jte.execute(-1, new Properties(), incomingParameters);
-            fail("test should throw an exception here");
-        } catch (Exception jteException) {
-            assertEquals("task logic failed to run for task  \"NULL:0.0.0\"", jteException.getMessage());
-        }
-
+        assertThatThrownBy(() -> jte.execute(-1, new Properties(), incomingParameters))
+            .hasMessage("task logic failed to run for task  \"NULL:0.0.0\"");
         task.getTaskLogic().setLogic("org.onap.policy.apex.plugins.executor.java.DummyJavaTaskLogic");
-        try {
-            jte.prepare();
-            jte.execute(-1, new Properties(), incomingParameters);
-            fail("test should throw an exception here");
-        } catch (Exception jteException) {
-            assertEquals("execute-post: task logic execution failure on task \"NULL\" in model NULL:0.0.0",
-                            jteException.getMessage());
-        }
+        jte.prepare();
+        assertThatThrownBy(() -> jte.execute(-1, new Properties(), incomingParameters))
+            .hasMessage("execute-post: task logic execution failure on task \"NULL\" in model NULL:0.0.0");
+        jte.prepare();
+        Map<String, Object> returnMap = jte.execute(0, new Properties(), incomingParameters);
+        assertEquals(0, returnMap.size());
+        jte.cleanUp();
 
-        try {
-            jte.prepare();
-            Map<String, Object> returnMap = jte.execute(0, new Properties(), incomingParameters);
-            assertEquals(0, returnMap.size());
-            jte.cleanUp();
-        } catch (Exception jteException) {
-            fail("test should not throw an exception here");
-        }
     }
 }
diff --git a/plugins/plugins-executor/plugins-executor-java/src/test/java/org/onap/policy/apex/plugins/executor/java/JavaTaskSelectExecutorTest.java b/plugins/plugins-executor/plugins-executor-java/src/test/java/org/onap/policy/apex/plugins/executor/java/JavaTaskSelectExecutorTest.java
index 38792c409..61acecd9b 100644
--- a/plugins/plugins-executor/plugins-executor-java/src/test/java/org/onap/policy/apex/plugins/executor/java/JavaTaskSelectExecutorTest.java
+++ b/plugins/plugins-executor/plugins-executor-java/src/test/java/org/onap/policy/apex/plugins/executor/java/JavaTaskSelectExecutorTest.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;
@@ -35,6 +36,7 @@ import org.onap.policy.apex.context.parameters.LockManagerParameters;
 import org.onap.policy.apex.context.parameters.PersistorParameters;
 import org.onap.policy.apex.core.engine.context.ApexInternalContext;
 import org.onap.policy.apex.core.engine.event.EnEvent;
+import org.onap.policy.apex.core.engine.executor.exception.StateMachineException;
 import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
 import org.onap.policy.apex.model.eventmodel.concepts.AxEvent;
 import org.onap.policy.apex.model.policymodel.concepts.AxPolicyModel;
@@ -67,76 +69,40 @@ public class JavaTaskSelectExecutorTest {
     }
 
     @Test
-    public void testJavaTaskSelectExecutor() {
+    public void testJavaTaskSelectExecutor() throws StateMachineException, ContextException {
         JavaTaskSelectExecutor jtse = new JavaTaskSelectExecutor();
         assertNotNull(jtse);
 
-        try {
-            jtse.prepare();
-            fail("test should throw an exception here");
-        } catch (Exception jtseException) {
-            assertEquals(java.lang.NullPointerException.class, jtseException.getClass());
-        }
-
+        assertThatThrownBy(jtse::prepare)
+            .isInstanceOf(java.lang.NullPointerException.class);
         AxState state = new AxState();
         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());
         jtse.setContext(null, state, internalContext);
 
-        try {
-            jtse.prepare();
-            fail("test should throw an exception here");
-        } catch (Exception jtseException) {
-            assertEquals("instantiation error on Java class \"\"", jtseException.getMessage());
-        }
-
+        assertThatThrownBy(jtse::prepare)
+            .hasMessage("instantiation error on Java class \"\"");
         state.getTaskSelectionLogic().setLogic("java.lang.String");
 
-        try {
-            jtse.prepare();
-        } catch (Exception jtseException) {
-            fail("test should not throw an exception here");
-        }
-
-        try {
-            jtse.execute(-1, new Properties(), null);
-            fail("test should throw an exception here");
-        } catch (Exception jtseException) {
-            assertEquals(java.lang.NullPointerException.class, jtseException.getClass());
-        }
+        jtse.prepare();
 
+        assertThatThrownBy(() -> jtse.execute(-1, new Properties(), null))
+            .isInstanceOf(java.lang.NullPointerException.class);
         AxEvent axEvent = new AxEvent(new AxArtifactKey("Event", "0.0.1"));
         EnEvent event = new EnEvent(axEvent);
-        try {
-            jtse.execute(-1, new Properties(), event);
-            fail("test should throw an exception here");
-        } catch (Exception jtseException) {
-            assertEquals("task selection logic failed to run for state  \"NULL:0.0.0:NULL:NULL\"",
-                            jtseException.getMessage());
-        }
-
+        assertThatThrownBy(() -> jtse.execute(-1, new Properties(), event))
+            .hasMessage("task selection logic failed to run for state  \"NULL:0.0.0:NULL:NULL\"");
         state.getTaskSelectionLogic()
                         .setLogic("org.onap.policy.apex.plugins.executor.java.DummyJavaTaskSelectionLogic");
-        try {
-            jtse.prepare();
+
+        jtse.prepare();
+        assertThatThrownBy(() -> {
             jtse.execute(-1, new Properties(), event);
-            fail("test should throw an exception here");
-        } catch (Exception jtseException) {
-            assertEquals("execute-post: task selection logic failed on state \"NULL:0.0.0:NULL:NULL\"",
-                            jtseException.getMessage());
-        }
+        }).hasMessage("execute-post: task selection logic failed on state \"NULL:0.0.0:NULL:NULL\"");
 
-        try {
-            jtse.prepare();
-            AxArtifactKey taskKey = jtse.execute(0, new Properties(), event);
-            assertEquals("NULL:0.0.0", taskKey.getId());
-            jtse.cleanUp();
-        } catch (Exception jtseException) {
-            fail("test should not throw an exception here");
-        }
+        jtse.prepare();
+        AxArtifactKey taskKey = jtse.execute(0, new Properties(), event);
+        assertEquals("NULL:0.0.0", taskKey.getId());
+        jtse.cleanUp();
     }
 }
diff --git a/plugins/plugins-executor/plugins-executor-jruby/src/test/java/org/onap/policy/apex/plugins/executor/jruby/JrubyStateFinalizerExecutorTest.java b/plugins/plugins-executor/plugins-executor-jruby/src/test/java/org/onap/policy/apex/plugins/executor/jruby/JrubyStateFinalizerExecutorTest.java
index fd6f24474..eca9a45cd 100644
--- a/plugins/plugins-executor/plugins-executor-jruby/src/test/java/org/onap/policy/apex/plugins/executor/jruby/JrubyStateFinalizerExecutorTest.java
+++ b/plugins/plugins-executor/plugins-executor-jruby/src/test/java/org/onap/policy/apex/plugins/executor/jruby/JrubyStateFinalizerExecutorTest.java
@@ -1,6 +1,7 @@
 /*-

  * ============LICENSE_START=======================================================

  *  Copyright (C) 2019 Nordix Foundation.

+ *  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.jruby;

 

+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.lang.reflect.Field;

 import java.util.Properties;

@@ -76,68 +77,44 @@ public class JrubyStateFinalizerExecutorTest {
     }

 

     @Test

-    public void testJrubyStateFinalizerExecutor() {

+    public void testJrubyStateFinalizerExecutor() throws StateMachineException, ContextException,

+        NoSuchFieldException, SecurityException, IllegalArgumentException, IllegalAccessException {

         JrubyStateFinalizerExecutor jsfe = new JrubyStateFinalizerExecutor();

         assertNotNull(jsfe);

 

-        try {

-            Field fieldContainer = JrubyStateFinalizerExecutor.class.getDeclaredField("container");

-            fieldContainer.setAccessible(true);

-            fieldContainer.set(jsfe, null);

-            jsfe.prepare();

-            fail("test should throw an exception here");

-        } catch (Exception jtseException) {

-            assertEquals(java.lang.NullPointerException.class, jtseException.getClass());

-        }

+        Field fieldContainer = JrubyStateFinalizerExecutor.class.getDeclaredField("container");

+        fieldContainer.setAccessible(true);

+        fieldContainer.set(jsfe, null);

+        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();

-        } 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("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());

-        }

+        jsfe.prepare();

 

+        assertThatThrownBy(() -> jsfe.execute(-1, new Properties(), null))

+            .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");

         AxEvent axEvent = new AxEvent(new AxArtifactKey("Event", "0.0.1"));

-        EnEvent event = new EnEvent(axEvent);

 

         final String jrubyLogic = "if executor.executionId == -1" + "\n return false" + "\n else "

                 + "\n executor.setSelectedStateOutputName(\"SelectedOutputIsMe\")" + "\n return true" + "\n end";

         stateFinalizerLogic.setLogic(jrubyLogic);

 

+        EnEvent event = new EnEvent(axEvent);

         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();

 

     }

 }

diff --git a/plugins/plugins-executor/plugins-executor-jruby/src/test/java/org/onap/policy/apex/plugins/executor/jruby/JrubyTaskExecutorTest.java b/plugins/plugins-executor/plugins-executor-jruby/src/test/java/org/onap/policy/apex/plugins/executor/jruby/JrubyTaskExecutorTest.java
index eb4707c5b..e2785d816 100644
--- a/plugins/plugins-executor/plugins-executor-jruby/src/test/java/org/onap/policy/apex/plugins/executor/jruby/JrubyTaskExecutorTest.java
+++ b/plugins/plugins-executor/plugins-executor-jruby/src/test/java/org/onap/policy/apex/plugins/executor/jruby/JrubyTaskExecutorTest.java
@@ -1,7 +1,7 @@
 /*-

  * ============LICENSE_START=======================================================

  *  Copyright (C) 2019 Nordix Foundation.

- *  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 +21,9 @@
 

 package org.onap.policy.apex.plugins.executor.jruby;

 

+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.lang.reflect.Field;

 import java.util.HashMap;

@@ -38,6 +38,7 @@ import org.onap.policy.apex.context.parameters.DistributorParameters;
 import org.onap.policy.apex.context.parameters.LockManagerParameters;

 import org.onap.policy.apex.context.parameters.PersistorParameters;

 import org.onap.policy.apex.core.engine.context.ApexInternalContext;

+import org.onap.policy.apex.core.engine.executor.exception.StateMachineException;

 import org.onap.policy.apex.model.policymodel.concepts.AxPolicyModel;

 import org.onap.policy.apex.model.policymodel.concepts.AxTask;

 import org.onap.policy.common.parameters.ParameterService;

@@ -68,7 +69,8 @@ public class JrubyTaskExecutorTest {
     }

 

     @Test

-    public void testJrubyTaskExecutor() {

+    public void testJrubyTaskExecutor() throws StateMachineException, ContextException,

+        IllegalArgumentException, IllegalAccessException, NoSuchFieldException, SecurityException {

         // Run test twice to check for incorrect shutdown activity

         jrubyExecutorTest();

         jrubyExecutorTest();

@@ -77,63 +79,38 @@ public class JrubyTaskExecutorTest {
     /**

      * Test the JRuby executor.

      */

-    private void jrubyExecutorTest() {

+    private void jrubyExecutorTest() throws StateMachineException, ContextException,

+        IllegalArgumentException, IllegalAccessException, NoSuchFieldException, SecurityException {

         JrubyTaskExecutor jte = new JrubyTaskExecutor();

         assertNotNull(jte);

 

-        try {

-            Field fieldContainer = JrubyTaskExecutor.class.getDeclaredField("container");

-            fieldContainer.setAccessible(true);

-            fieldContainer.set(jte, null);

-            jte.prepare();

-            fail("test should throw an exception here");

-        } catch (Exception jtseException) {

-            assertEquals(java.lang.NullPointerException.class, jtseException.getClass());

-        }

-

+        Field fieldContainer = JrubyTaskExecutor.class.getDeclaredField("container");

+        fieldContainer.setAccessible(true);

+        fieldContainer.set(jte, null);

+        assertThatThrownBy(jte::prepare).isInstanceOf(java.lang.NullPointerException.class);

         AxTask task = new AxTask();

         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());

+

         jte.setContext(null, task, internalContext);

-        try {

-            jte.prepare();

-        } catch (Exception jtseException) {

-            fail("test should not throw an exception here");

-        }

 

-        Map<String, Object> incomingParameters = new HashMap<>();

-        try {

-            jte.execute(-1, new Properties(), incomingParameters);

-            fail("test should throw an exception here");

-        } catch (Exception jteException) {

-            assertEquals("execute-post: task logic execution failure on task \"NULL\" in model NULL:0.0.0",

-                            jteException.getMessage());

-        }

+        jte.prepare();

 

+        Map<String, Object> incomingParameters = new HashMap<>();

+        assertThatThrownBy(() -> jte.execute(-1, new Properties(), incomingParameters))

+            .hasMessage("execute-post: task logic execution failure on task \"NULL\" in model NULL:0.0.0");

         final String jrubyLogic = "if executor.executionId == -1" + "\n return false" + "\n else " + "\n return true"

                         + "\n end";

         task.getTaskLogic().setLogic(jrubyLogic);

 

-        try {

-            jte.prepare();

-            Map<String, Object> returnMap = jte.execute(0, new Properties(), incomingParameters);

-            assertEquals(0, returnMap.size());

-            jte.cleanUp();

-        } catch (Exception jteException) {

-            fail("test should not throw an exception here");

-        }

+        jte.prepare();

+        Map<String, Object> returnMap = jte.execute(0, new Properties(), incomingParameters);

+        assertEquals(0, returnMap.size());

+        jte.cleanUp();

 

-        try {

-            jte.prepare();

-            Map<String, Object> returnMap = jte.execute(0, new Properties(), incomingParameters);

-            assertEquals(0, returnMap.size());

-            jte.cleanUp();

-        } catch (Exception jteException) {

-            fail("test should not throw an exception here");

-        }

+        jte.prepare();

+        Map<String, Object> returnMap1 = jte.execute(0, new Properties(), incomingParameters);

+        assertEquals(0, returnMap1.size());

+        jte.cleanUp();

     }

 }

diff --git a/plugins/plugins-executor/plugins-executor-jruby/src/test/java/org/onap/policy/apex/plugins/executor/jruby/JrubyTaskSelectExecutorTest.java b/plugins/plugins-executor/plugins-executor-jruby/src/test/java/org/onap/policy/apex/plugins/executor/jruby/JrubyTaskSelectExecutorTest.java
index 617db8d8c..59d1be4b4 100644
--- a/plugins/plugins-executor/plugins-executor-jruby/src/test/java/org/onap/policy/apex/plugins/executor/jruby/JrubyTaskSelectExecutorTest.java
+++ b/plugins/plugins-executor/plugins-executor-jruby/src/test/java/org/onap/policy/apex/plugins/executor/jruby/JrubyTaskSelectExecutorTest.java
@@ -1,6 +1,7 @@
 /*-

  * ============LICENSE_START=======================================================

  *  Copyright (C) 2019 Nordix Foundation.

+ *  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.jruby;

 

+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.lang.reflect.Field;

 import java.util.Properties;

@@ -36,6 +37,7 @@ import org.onap.policy.apex.context.parameters.LockManagerParameters;
 import org.onap.policy.apex.context.parameters.PersistorParameters;

 import org.onap.policy.apex.core.engine.context.ApexInternalContext;

 import org.onap.policy.apex.core.engine.event.EnEvent;

+import org.onap.policy.apex.core.engine.executor.exception.StateMachineException;

 import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;

 import org.onap.policy.apex.model.eventmodel.concepts.AxEvent;

 import org.onap.policy.apex.model.policymodel.concepts.AxPolicyModel;

@@ -68,56 +70,36 @@ public class JrubyTaskSelectExecutorTest {
     }

 

     @Test

-    public void testJrubyTaskSelectExecutor() {

+    public void testJrubyTaskSelectExecutor() throws StateMachineException, ContextException,

+        NoSuchFieldException, SecurityException, IllegalArgumentException, IllegalAccessException {

         JrubyTaskSelectExecutor jtse = new JrubyTaskSelectExecutor();

         assertNotNull(jtse);

         assertNotNull(jtse.getOutputEventSet());

-        try {

-            Field fieldContainer = JrubyTaskSelectExecutor.class.getDeclaredField("container");

-            fieldContainer.setAccessible(true);

-            fieldContainer.set(jtse, null);

-            jtse.prepare();

-            fail("test should throw an exception here");

-        } catch (Exception jtseException) {

-            assertEquals(java.lang.NullPointerException.class, jtseException.getClass());

-        }

 

+        Field fieldContainer = JrubyTaskSelectExecutor.class.getDeclaredField("container");

+        fieldContainer.setAccessible(true);

+        fieldContainer.set(jtse, null);

+

+        assertThatThrownBy(jtse::prepare).isInstanceOf(java.lang.NullPointerException.class);

         AxState state = new AxState();

         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());

+

         jtse.setContext(null, state, internalContext);

 

 

-        try {

-            jtse.prepare();

-        } catch (Exception jtseException) {

-            fail("test should not throw an exception here");

-        }

+        jtse.prepare();

         AxEvent axEvent = new AxEvent(new AxArtifactKey("Event", "0.0.1"));

         EnEvent event = new EnEvent(axEvent);

-        try {

-            jtse.execute(-1, new Properties(), event);

-            fail("test should throw an exception here");

-        } catch (Exception jtseException) {

-            assertEquals("execute-post: task selection logic failed on state \"NULL:0.0.0:NULL:NULL\"",

-                    jtseException.getMessage());

-        }

-

+        assertThatThrownBy(() -> jtse.execute(-1, new Properties(), event))

+            .hasMessage("execute-post: task selection logic failed on state \"NULL:0.0.0:NULL:NULL\"");

         final String jrubyLogic =

                 "if executor.executionId == -1" + "\n return false" + "\n else " + "\n return true" + "\n end";

         state.getTaskSelectionLogic().setLogic(jrubyLogic);

 

-        try {

-            jtse.prepare();

-            AxArtifactKey taskKey = jtse.execute(0, new Properties(), event);

-            assertEquals("NULL:0.0.0", taskKey.getId());

-            jtse.cleanUp();

-        } catch (Exception jtseException) {

-            fail("test should not throw an exception here");

-        }

+        jtse.prepare();

+        AxArtifactKey taskKey = jtse.execute(0, new Properties(), event);

+        assertEquals("NULL:0.0.0", taskKey.getId());

+        jtse.cleanUp();

     }

 }

diff --git a/plugins/plugins-executor/plugins-executor-mvel/src/test/java/org/onap/policy/apex/plugins/executor/mvel/MvelStateFinalizerExecutorTest.java b/plugins/plugins-executor/plugins-executor-mvel/src/test/java/org/onap/policy/apex/plugins/executor/mvel/MvelStateFinalizerExecutorTest.java
index 54ab78e61..2cd19c6f6 100644
--- a/plugins/plugins-executor/plugins-executor-mvel/src/test/java/org/onap/policy/apex/plugins/executor/mvel/MvelStateFinalizerExecutorTest.java
+++ b/plugins/plugins-executor/plugins-executor-mvel/src/test/java/org/onap/policy/apex/plugins/executor/mvel/MvelStateFinalizerExecutorTest.java
@@ -1,6 +1,7 @@
 /*-
  * ============LICENSE_START=======================================================
  *  Copyright (C) 2019 Nordix Foundation.
+ *  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.mvel;
 
+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;
@@ -80,30 +81,18 @@ public class MvelStateFinalizerExecutorTest {
     }
 
     @Test
-    public void testJavaStateFinalizerExecutor() {
+    public void testJavaStateFinalizerExecutor() throws StateMachineException, ContextException {
         MvelStateFinalizerExecutor msfe = new MvelStateFinalizerExecutor();
         assertNotNull(msfe);
 
-        try {
-            msfe.prepare();
-            fail("test should throw an exception here");
-        } catch (Exception msfeException) {
-            assertEquals(java.lang.NullPointerException.class, msfeException.getClass());
-        }
-
+        assertThatThrownBy(msfe::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);
@@ -111,69 +100,31 @@ public class MvelStateFinalizerExecutorTest {
         msfe.setContext(parentStateExcutor, stateFinalizerLogic, internalContext);
 
         stateFinalizerLogic.setLogic("x > 1 2 ()");
-        try {
-            msfe.prepare();
-            fail("test should throw an exception here");
-        } catch (Exception msfeException) {
-            assertEquals("failed to compile MVEL code for state NULL:0.0.0:NULL:NULL", msfeException.getMessage());
-        }
-
+        assertThatThrownBy(msfe::prepare)
+            .hasMessage("failed to compile MVEL code for state NULL:0.0.0:NULL:NULL");
         stateFinalizerLogic.setLogic("java.lang.String");
 
-        try {
-            msfe.prepare();
-        } catch (Exception msfeException) {
-            fail("test should not throw an exception here");
-        }
-
-        try {
-            msfe.execute(-1, new Properties(), null);
-            fail("test should throw an exception here");
-        } catch (Exception msfeException) {
-            assertEquals("failed to execute MVEL code for state NULL:0.0.0:NULL:NULL",
-                    msfeException.getMessage());
-        }
+        msfe.prepare();
 
+        assertThatThrownBy(() -> msfe.execute(-1, new Properties(), null))
+            .hasMessage("failed to execute MVEL code for state NULL:0.0.0:NULL:NULL");
         AxEvent axEvent = new AxEvent(new AxArtifactKey("Event", "0.0.1"));
         EnEvent event = new EnEvent(axEvent);
-        try {
-            msfe.execute(-1, new Properties(), event);
-            fail("test should throw an exception here");
-        } catch (Exception msfeException) {
-            assertEquals("failed to execute MVEL code for state NULL:0.0.0:NULL:NULL",
-                    msfeException.getMessage());
-        }
-
+        assertThatThrownBy(() -> msfe.execute(-1, new Properties(), event))
+            .hasMessage("failed to execute MVEL code for state NULL:0.0.0:NULL:NULL");
         stateFinalizerLogic.setLogic("executionId !=-1");
-        try {
-            msfe.prepare();
-            msfe.execute(-1, new Properties(), event);
-            fail("test should throw an exception here");
-        } catch (Exception msfeException) {
-            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",
-                    msfeException.getMessage());
-        }
-
+        msfe.prepare();
+        assertThatThrownBy(() -> msfe.execute(-1, new Properties(), event))
+            .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");
         stateFinalizerLogic.setLogic(
                 "if (executionId == -1) {return false;}setSelectedStateOutputName(\"SelectedOutputIsMe\");"
                         + "return true;");
         state.getStateOutputs().put("SelectedOutputIsMe", null);
-        try {
-            msfe.prepare();
-            String stateOutput = msfe.execute(0, new Properties(), event);
-            assertEquals("SelectedOutputIsMe", stateOutput);
-        } catch (Exception msfeException) {
-            LOGGER.warn("Unexpected exception happened here.", msfeException);
-            fail("test should not throw an exception here");
-        } finally {
-            try {
-                msfe.cleanUp();
-            } catch (StateMachineException msfeException) {
-                LOGGER.warn("Unexpected exception happened here.", msfeException);
-                fail("test should not throw an exception here");
-            }
-        }
+
+        msfe.prepare();
+        String stateOutput = msfe.execute(0, new Properties(), event);
+        assertEquals("SelectedOutputIsMe", stateOutput);
+        msfe.cleanUp();
     }
 }
diff --git a/plugins/plugins-executor/plugins-executor-mvel/src/test/java/org/onap/policy/apex/plugins/executor/mvel/MvelTaskExecutorTest.java b/plugins/plugins-executor/plugins-executor-mvel/src/test/java/org/onap/policy/apex/plugins/executor/mvel/MvelTaskExecutorTest.java
index e4169274a..a4d2cbf2b 100644
--- a/plugins/plugins-executor/plugins-executor-mvel/src/test/java/org/onap/policy/apex/plugins/executor/mvel/MvelTaskExecutorTest.java
+++ b/plugins/plugins-executor/plugins-executor-mvel/src/test/java/org/onap/policy/apex/plugins/executor/mvel/MvelTaskExecutorTest.java
@@ -1,6 +1,7 @@
 /*-
  * ============LICENSE_START=======================================================
  *  Copyright (C) 2019 Nordix Foundation.
+ *  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.mvel;
 
+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.HashMap;
 import java.util.Map;
@@ -36,6 +37,7 @@ import org.onap.policy.apex.context.parameters.DistributorParameters;
 import org.onap.policy.apex.context.parameters.LockManagerParameters;
 import org.onap.policy.apex.context.parameters.PersistorParameters;
 import org.onap.policy.apex.core.engine.context.ApexInternalContext;
+import org.onap.policy.apex.core.engine.executor.exception.StateMachineException;
 import org.onap.policy.apex.model.policymodel.concepts.AxPolicyModel;
 import org.onap.policy.apex.model.policymodel.concepts.AxTask;
 import org.onap.policy.common.parameters.ParameterService;
@@ -66,74 +68,37 @@ public class MvelTaskExecutorTest {
     }
 
     @Test
-    public void testMvelTaskExecutor() {
+    public void testMvelTaskExecutor() throws StateMachineException, ContextException {
         MvelTaskExecutor mte = new MvelTaskExecutor();
         assertNotNull(mte);
 
-        try {
-            mte.prepare();
-            fail("test should throw an exception here");
-        } catch (Exception mteException) {
-            assertEquals(java.lang.NullPointerException.class, mteException.getClass());
-        }
-
+        assertThatThrownBy(mte::prepare)
+            .isInstanceOf(java.lang.NullPointerException.class);
         AxTask task = new AxTask();
         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());
         mte.setContext(null, task, internalContext);
 
         task.getTaskLogic().setLogic("x > 1 2 ()");
-        try {
-            mte.prepare();
-            fail("test should throw an exception here");
-        } catch (Exception mteException) {
-            assertEquals("failed to compile MVEL code for task NULL:0.0.0", mteException.getMessage());
-        }
-
+        assertThatThrownBy(mte::prepare)
+            .hasMessage("failed to compile MVEL code for task NULL:0.0.0");
         task.getTaskLogic().setLogic("x");
 
-        try {
-            mte.prepare();
-        } catch (Exception mteException) {
-            fail("test should not throw an exception here");
-        }
-
-        try {
-            mte.execute(-1, new Properties(), null);
-            fail("test should throw an exception here");
-        } catch (Exception mteException) {
-            assertEquals(java.lang.NullPointerException.class, mteException.getClass());
-        }
+        mte.prepare();
 
+        assertThatThrownBy(() -> mte.execute(-1, new Properties(), null))
+            .isInstanceOf(java.lang.NullPointerException.class);
         Map<String, Object> incomingParameters = new HashMap<>();
-        try {
-            mte.execute(-1, new Properties(), incomingParameters);
-            fail("test should throw an exception here");
-        } catch (Exception mteException) {
-            assertEquals("failed to execute MVEL code for task NULL:0.0.0", mteException.getMessage());
-        }
-
+        assertThatThrownBy(() -> mte.execute(-1, new Properties(), incomingParameters))
+            .hasMessage("failed to execute MVEL code for task NULL:0.0.0");
         task.getTaskLogic().setLogic("executionId != -1");
-        try {
-            mte.prepare();
-            mte.execute(-1, new Properties(), incomingParameters);
-            fail("test should throw an exception here");
-        } catch (Exception mteException) {
-            assertEquals("execute-post: task logic execution failure on task \"NULL\" in model NULL:0.0.0",
-                    mteException.getMessage());
-        }
+        mte.prepare();
+        assertThatThrownBy(() -> mte.execute(-1, new Properties(), incomingParameters))
+            .hasMessage("execute-post: task logic execution failure on task \"NULL\" in model NULL:0.0.0");
 
-        try {
-            mte.prepare();
-            Map<String, Object> returnMap = mte.execute(0, new Properties(), incomingParameters);
-            assertEquals(0, returnMap.size());
-            mte.cleanUp();
-        } catch (Exception mteException) {
-            fail("test should not throw an exception here");
-        }
+        mte.prepare();
+        Map<String, Object> returnMap = mte.execute(0, new Properties(), incomingParameters);
+        assertEquals(0, returnMap.size());
+        mte.cleanUp();
     }
 }
diff --git a/plugins/plugins-executor/plugins-executor-mvel/src/test/java/org/onap/policy/apex/plugins/executor/mvel/MvelTaskSelectExecutorTest.java b/plugins/plugins-executor/plugins-executor-mvel/src/test/java/org/onap/policy/apex/plugins/executor/mvel/MvelTaskSelectExecutorTest.java
index cd458fdac..d81c3d13b 100644
--- a/plugins/plugins-executor/plugins-executor-mvel/src/test/java/org/onap/policy/apex/plugins/executor/mvel/MvelTaskSelectExecutorTest.java
+++ b/plugins/plugins-executor/plugins-executor-mvel/src/test/java/org/onap/policy/apex/plugins/executor/mvel/MvelTaskSelectExecutorTest.java
@@ -1,6 +1,7 @@
 /*-
  * ============LICENSE_START=======================================================
  *  Copyright (C) 2019 Nordix Foundation.
+ *  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.mvel;
 
+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;
@@ -35,6 +36,7 @@ import org.onap.policy.apex.context.parameters.LockManagerParameters;
 import org.onap.policy.apex.context.parameters.PersistorParameters;
 import org.onap.policy.apex.core.engine.context.ApexInternalContext;
 import org.onap.policy.apex.core.engine.event.EnEvent;
+import org.onap.policy.apex.core.engine.executor.exception.StateMachineException;
 import org.onap.policy.apex.model.basicmodel.concepts.AxArtifactKey;
 import org.onap.policy.apex.model.eventmodel.concepts.AxEvent;
 import org.onap.policy.apex.model.policymodel.concepts.AxPolicyModel;
@@ -67,76 +69,37 @@ public class MvelTaskSelectExecutorTest {
     }
 
     @Test
-    public void testJavaTaskSelectExecutor() {
+    public void testJavaTaskSelectExecutor() throws StateMachineException, ContextException {
         MvelTaskSelectExecutor mtse = new MvelTaskSelectExecutor();
         assertNotNull(mtse);
 
-        try {
-            mtse.prepare();
-            fail("test should throw an exception here");
-        } catch (Exception mtseException) {
-            assertEquals(java.lang.NullPointerException.class, mtseException.getClass());
-        }
-
+        assertThatThrownBy(mtse::prepare)
+            .isInstanceOf(java.lang.NullPointerException.class);
         AxState state = new AxState();
         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());
         mtse.setContext(null, state, internalContext);
 
         state.getTaskSelectionLogic().setLogic("x > 1 2 ()");
-        try {
-            mtse.prepare();
-            fail("test should throw an exception here");
-        } catch (Exception mtseException) {
-            assertEquals("failed to compile MVEL code for state NULL:0.0.0:NULL:NULL", mtseException.getMessage());
-        }
-
+        assertThatThrownBy(mtse::prepare)
+            .hasMessage("failed to compile MVEL code for state NULL:0.0.0:NULL:NULL");
         state.getTaskSelectionLogic().setLogic("java.lang.String");
 
-        try {
-            mtse.prepare();
-        } catch (Exception mtseException) {
-            fail("test should not throw an exception here");
-        }
-
-        try {
-            mtse.execute(-1, new Properties(), null);
-            fail("test should throw an exception here");
-        } catch (Exception mtseException) {
-            assertEquals(java.lang.NullPointerException.class, mtseException.getClass());
-        }
+        mtse.prepare();
 
+        assertThatThrownBy(() -> mtse.execute(-1, new Properties(), null))
+            .isInstanceOf(java.lang.NullPointerException.class);
         AxEvent axEvent = new AxEvent(new AxArtifactKey("Event", "0.0.1"));
         EnEvent event = new EnEvent(axEvent);
-        try {
-            mtse.execute(-1, new Properties(), event);
-            fail("test should throw an exception here");
-        } catch (Exception mtseException) {
-            assertEquals("failed to execute MVEL code for state NULL:0.0.0:NULL:NULL",
-                    mtseException.getMessage());
-        }
-
+        assertThatThrownBy(() -> mtse.execute(-1, new Properties(), event))
+            .hasMessage("failed to execute MVEL code for state NULL:0.0.0:NULL:NULL");
         state.getTaskSelectionLogic().setLogic("executionId != -1");
-        try {
-            mtse.prepare();
-            mtse.execute(-1, new Properties(), event);
-            fail("test should throw an exception here");
-        } catch (Exception mtseException) {
-            assertEquals("execute-post: task selection logic failed on state \"NULL:0.0.0:NULL:NULL\"",
-                    mtseException.getMessage());
-        }
-
-        try {
-            mtse.prepare();
-            AxArtifactKey taskKey = mtse.execute(0, new Properties(), event);
-            assertEquals("NULL:0.0.0", taskKey.getId());
-            mtse.cleanUp();
-        } catch (Exception mtseException) {
-            fail("test should not throw an exception here");
-        }
+        mtse.prepare();
+        assertThatThrownBy(() -> mtse.execute(-1, new Properties(), event))
+            .hasMessageContaining("execute-post: task selection logic failed on state \"NULL:0.0.0:NULL:NULL\"");
+        mtse.prepare();
+        AxArtifactKey taskKey = mtse.execute(0, new Properties(), event);
+        assertEquals("NULL:0.0.0", taskKey.getId());
+        mtse.cleanUp();
     }
 }