Fix issues in xacml-pdp for new sonar rules

Addressed issues reported due to updates to the sonar rules:
- invoke only one method in a junit lambda
- complete the assertion
- use assertThat().exists(), canRead(), etc.

Issue-ID: POLICY-2681
Change-Id: I2935f4d0295244ab3b11a57a3bc401c64b695fd1
Signed-off-by: Jim Hahn <jrh3@att.com>

11 files changed, 40 insertions, 44 deletions

diff --git a/applications/common/src/test/java/org/onap/policy/pdp/xacml/application/common/XacmlPolicyUtilsTest.java b/applications/common/src/test/java/org/onap/policy/pdp/xacml/application/common/XacmlPolicyUtilsTest.java
index fbfde1a4..d3aba91f 100644
--- a/applications/common/src/test/java/org/onap/policy/pdp/xacml/application/common/XacmlPolicyUtilsTest.java
+++ b/applications/common/src/test/java/org/onap/policy/pdp/xacml/application/common/XacmlPolicyUtilsTest.java
@@ -207,12 +207,12 @@ public class XacmlPolicyUtilsTest {
 
     @Test
     public void testUncommonConditions() throws IOException {
-        File fileTemp = policyFolder.newFile();
+        Path fileTemp = policyFolder.newFile().toPath();
         assertThatExceptionOfType(IllegalArgumentException.class).isThrownBy(() ->
-            XacmlPolicyUtils.writePolicyFile(fileTemp.toPath(), new String("not a policy"))
+            XacmlPolicyUtils.writePolicyFile(fileTemp, "not a policy")
         );
         assertThatExceptionOfType(IllegalArgumentException.class).isThrownBy(() ->
-            XacmlPolicyUtils.constructUniquePolicyFilename(new String("not a policy"),
+            XacmlPolicyUtils.constructUniquePolicyFilename("not a policy",
                     policyFolder.getRoot().toPath())
         );
     }
@@ -313,7 +313,7 @@ public class XacmlPolicyUtilsTest {
         // Copy to this folder
         //
         File copyFolder = policyFolder.newFolder("copy");
-        assertThat(copyFolder.exists()).isTrue();
+        assertThat(copyFolder).exists();
         //
         // Mock up a properties object
         //
@@ -332,10 +332,10 @@ public class XacmlPolicyUtilsTest {
         File propertiesFile = XacmlPolicyUtils.copyXacmlPropertiesContents(
                 fileProperties.toAbsolutePath().toString(), mockProperties, myCreator);
 
-        assertThat(propertiesFile.canRead()).isTrue();
+        assertThat(propertiesFile).canRead();
         assertThat(Path.of(copyFolder.getAbsolutePath(),
-                rootPath.getFileName().toString()).toFile().canRead()).isTrue();
+                rootPath.getFileName().toString()).toFile()).canRead();
         assertThat(Path.of(copyFolder.getAbsolutePath(),
-                path1.getFileName().toString()).toFile().canRead()).isTrue();
+                path1.getFileName().toString()).toFile()).canRead();
     }
 }
diff --git a/applications/common/src/test/java/org/onap/policy/pdp/xacml/application/common/matchable/MatchablePolicyTypeTest.java b/applications/common/src/test/java/org/onap/policy/pdp/xacml/application/common/matchable/MatchablePolicyTypeTest.java
index cd28bddc..9b489a67 100644
--- a/applications/common/src/test/java/org/onap/policy/pdp/xacml/application/common/matchable/MatchablePolicyTypeTest.java
+++ b/applications/common/src/test/java/org/onap/policy/pdp/xacml/application/common/matchable/MatchablePolicyTypeTest.java
@@ -187,10 +187,10 @@ public class MatchablePolicyTypeTest implements MatchableCallback {
         schema.setType("string");
         property.setEntrySchema(schema);
         MatchablePropertyTypeMap mapValue = new MatchablePropertyTypeMap(property);
-        assertThat(mapValue.validate(new String("foo"))).hasSize(0);
+        assertThat(mapValue.validate("foo")).isEmpty();
 
         MatchablePropertyTypeList listValue = new MatchablePropertyTypeList(property);
-        assertThat(listValue.validate(new String("foo"))).hasSize(0);
+        assertThat(listValue.validate("foo")).isEmpty();
     }
 
     @Test
diff --git a/applications/common/src/test/java/org/onap/policy/pdp/xacml/application/common/std/StdBaseTranslatorTest.java b/applications/common/src/test/java/org/onap/policy/pdp/xacml/application/common/std/StdBaseTranslatorTest.java
index 8e692583..b8a1d18a 100644
--- a/applications/common/src/test/java/org/onap/policy/pdp/xacml/application/common/std/StdBaseTranslatorTest.java
+++ b/applications/common/src/test/java/org/onap/policy/pdp/xacml/application/common/std/StdBaseTranslatorTest.java
@@ -162,7 +162,7 @@ public class StdBaseTranslatorTest {
 
         assertThat(rule.getObligationExpressions().getObligationExpression().size()).isEqualTo(1);
         assertThat(rule.getObligationExpressions().getObligationExpression().get(0)
-                .getAttributeAssignmentExpression().size()).isEqualTo(0);
+                .getAttributeAssignmentExpression()).isEmpty();
 
         //
         // Should not throw an exception
@@ -184,7 +184,7 @@ public class StdBaseTranslatorTest {
         assertNotNull(decision);
 
         assertThat(decision.getPolicies()).isNotNull();
-        assertThat(decision.getPolicies().size()).isEqualTo(0);
+        assertThat(decision.getPolicies()).isEmpty();
     }
 
     @Test
@@ -218,7 +218,7 @@ public class StdBaseTranslatorTest {
         assertNotNull(decision);
 
         assertThat(decision.getPolicies()).isNotNull();
-        assertThat(decision.getPolicies().size()).isEqualTo(0);
+        assertThat(decision.getPolicies()).isEmpty();
 
         Obligation badObligation = TestUtilsCommon.createXacmlObligation(
                 ToscaDictionary.ID_OBLIGATION_REST_BODY.stringValue(),
diff --git a/applications/common/src/test/java/org/onap/policy/pdp/xacml/application/common/std/StdCombinedPolicyResultsTranslatorTest.java b/applications/common/src/test/java/org/onap/policy/pdp/xacml/application/common/std/StdCombinedPolicyResultsTranslatorTest.java
index 42c13d9e..9f0e0ac9 100644
--- a/applications/common/src/test/java/org/onap/policy/pdp/xacml/application/common/std/StdCombinedPolicyResultsTranslatorTest.java
+++ b/applications/common/src/test/java/org/onap/policy/pdp/xacml/application/common/std/StdCombinedPolicyResultsTranslatorTest.java
@@ -116,7 +116,7 @@ public class StdCombinedPolicyResultsTranslatorTest {
         assertNotNull(decision);
 
         assertThat(decision.getPolicies()).isNotNull();
-        assertThat(decision.getPolicies().size()).isEqualTo(1);
+        assertThat(decision.getPolicies()).hasSize(1);
     }
 
     @Test
diff --git a/applications/monitoring/src/test/java/org/onap/policy/xacml/pdp/application/monitoring/MonitoringPdpApplicationTest.java b/applications/monitoring/src/test/java/org/onap/policy/xacml/pdp/application/monitoring/MonitoringPdpApplicationTest.java
index bdb8a343..fd6711d4 100644
--- a/applications/monitoring/src/test/java/org/onap/policy/xacml/pdp/application/monitoring/MonitoringPdpApplicationTest.java
+++ b/applications/monitoring/src/test/java/org/onap/policy/xacml/pdp/application/monitoring/MonitoringPdpApplicationTest.java
@@ -172,7 +172,7 @@ public class MonitoringPdpApplicationTest {
         LOGGER.info("Decision {}", decision);
 
         assertThat(decision.getKey()).isNotNull();
-        assertThat(decision.getKey().getPolicies()).hasSize(0);
+        assertThat(decision.getKey().getPolicies()).isEmpty();
         //
         // Test the branch for query params, and we have no policy anyway
         //
@@ -181,7 +181,7 @@ public class MonitoringPdpApplicationTest {
         LOGGER.info("Decision {}", decision);
 
         assertThat(decision.getKey()).isNotNull();
-        assertThat(decision.getKey().getPolicies()).hasSize(0);
+        assertThat(decision.getKey().getPolicies()).isEmpty();
         //
         // Test the branch for query params, and we have no policy anyway
         //
@@ -190,7 +190,7 @@ public class MonitoringPdpApplicationTest {
         LOGGER.info("Decision {}", decision);
 
         assertThat(decision.getKey()).isNotNull();
-        assertThat(decision.getKey().getPolicies()).hasSize(0);
+        assertThat(decision.getKey().getPolicies()).isEmpty();
     }
 
     @SuppressWarnings("unchecked")
@@ -244,8 +244,7 @@ public class MonitoringPdpApplicationTest {
         assertThat(decision.getKey()).isNotNull();
         assertThat(decision.getKey().getPolicies()).hasSize(1);
         jsonPolicy = (Map<String, Object>) decision.getKey().getPolicies().get("onap.scaleout.tca");
-        assertThat(jsonPolicy).isNotNull();
-        assertThat(jsonPolicy).doesNotContainKey("properties");
+        assertThat(jsonPolicy).isNotNull().doesNotContainKey("properties");
         //
         // Don't Ask for abbreviated results
         //
@@ -290,7 +289,7 @@ public class MonitoringPdpApplicationTest {
         LOGGER.info("Decision {}", decision.getKey());
 
         assertThat(decision.getKey()).isNotNull();
-        assertThat(decision.getKey().getPolicies()).hasSize(0);
+        assertThat(decision.getKey().getPolicies()).isEmpty();
     }
 
 }
diff --git a/applications/naming/src/test/java/org/onap/policy/xacml/pdp/application/naming/NamingPdpApplicationTest.java b/applications/naming/src/test/java/org/onap/policy/xacml/pdp/application/naming/NamingPdpApplicationTest.java
index 0077d0b9..85b182cd 100644
--- a/applications/naming/src/test/java/org/onap/policy/xacml/pdp/application/naming/NamingPdpApplicationTest.java
+++ b/applications/naming/src/test/java/org/onap/policy/xacml/pdp/application/naming/NamingPdpApplicationTest.java
@@ -176,7 +176,7 @@ public class NamingPdpApplicationTest {
         LOGGER.info("Decision {}", decision.getKey());
 
         assertThat(decision.getKey()).isNotNull();
-        assertThat(decision.getKey().getPolicies().size()).isEqualTo(0);
+        assertThat(decision.getKey().getPolicies()).isEmpty();
     }
 
     @Test
@@ -194,7 +194,7 @@ public class NamingPdpApplicationTest {
         // There is no default policy
         //
         assertThat(response).isNotNull();
-        assertThat(response.getPolicies().size()).isEqualTo(0);
+        assertThat(response.getPolicies()).isEmpty();
         //
         // Ask for VNF
         //
@@ -204,7 +204,7 @@ public class NamingPdpApplicationTest {
         //
         response = makeDecision();
         assertThat(response).isNotNull();
-        assertThat(response.getPolicies().size()).isEqualTo(1);
+        assertThat(response.getPolicies()).hasSize(1);
         //
         // Validate it
         //
@@ -227,7 +227,7 @@ public class NamingPdpApplicationTest {
             LOGGER.info("Decision Returned Policy {}", entrySet.getKey());
             assertThat(entrySet.getValue()).isInstanceOf(Map.class);
             Map<String, Object> policyContents = (Map<String, Object>) entrySet.getValue();
-            assertThat(policyContents.containsKey("properties")).isTrue();
+            assertThat(policyContents).containsKey("properties");
             assertThat(policyContents.get("properties")).isInstanceOf(Map.class);
             Map<String, Object> policyProperties = (Map<String, Object>) policyContents.get("properties");
 
diff --git a/applications/native/src/test/java/org/onap/policy/xacml/pdp/application/nativ/NativePdpApplicationTest.java b/applications/native/src/test/java/org/onap/policy/xacml/pdp/application/nativ/NativePdpApplicationTest.java
index a11c1b14..f434e80f 100644
--- a/applications/native/src/test/java/org/onap/policy/xacml/pdp/application/nativ/NativePdpApplicationTest.java
+++ b/applications/native/src/test/java/org/onap/policy/xacml/pdp/application/nativ/NativePdpApplicationTest.java
@@ -220,7 +220,7 @@ public class NativePdpApplicationTest {
         assertThat(response).isNotNull();
         Decision decision = response.getResults().iterator().next().getDecision();
         assertThat(decision).isNotNull();
-        assertThat(decision.toString()).isEqualTo(expected);
+        assertThat(decision).hasToString(expected);
         LOGGER.info("Xacml response we received {}", DOMResponse.toString(response));
     }
 }
\ No newline at end of file
diff --git a/applications/optimization/src/test/java/org/onap/policy/xacml/pdp/application/optimization/OptimizationPdpApplicationTest.java b/applications/optimization/src/test/java/org/onap/policy/xacml/pdp/application/optimization/OptimizationPdpApplicationTest.java
index 8886af21..631a359c 100644
--- a/applications/optimization/src/test/java/org/onap/policy/xacml/pdp/application/optimization/OptimizationPdpApplicationTest.java
+++ b/applications/optimization/src/test/java/org/onap/policy/xacml/pdp/application/optimization/OptimizationPdpApplicationTest.java
@@ -208,7 +208,7 @@ public class OptimizationPdpApplicationTest {
         LOGGER.info("Decision {}", decision.getKey());
 
         assertThat(decision.getKey()).isNotNull();
-        assertThat(decision.getKey().getPolicies().size()).isEqualTo(0);
+        assertThat(decision.getKey().getPolicies()).isEmpty();
     }
 
     /**
@@ -223,15 +223,14 @@ public class OptimizationPdpApplicationTest {
         //
         List<ToscaPolicy> loadedPolicies = TestUtils.loadPolicies("src/test/resources/test-optimization-policies.yaml",
                 service);
-        assertThat(loadedPolicies).isNotNull();
-        assertThat(loadedPolicies).hasSize(14);
+        assertThat(loadedPolicies).isNotNull().hasSize(14);
         //
         // Ask for a decision for available default policies
         //
         DecisionResponse response = makeDecision();
 
         assertThat(response).isNotNull();
-        assertThat(response.getPolicies().size()).isEqualTo(2);
+        assertThat(response.getPolicies()).hasSize(2);
         //
         // Validate it
         //
@@ -255,10 +254,10 @@ public class OptimizationPdpApplicationTest {
         DecisionResponse response = makeDecision();
 
         assertThat(response).isNotNull();
-        assertThat(response.getPolicies().size()).isEqualTo(1);
+        assertThat(response.getPolicies()).hasSize(1);
         response.getPolicies().forEach((key, value) -> {
-            assertThat(((Map<String, Object>) value).get("type"))
-                .isEqualTo(("onap.policies.optimization.resource.HpaPolicy"));
+            assertThat(((Map<String, Object>) value)).containsEntry("type",
+                            "onap.policies.optimization.resource.HpaPolicy");
         });
         //
         // Validate it
@@ -285,7 +284,7 @@ public class OptimizationPdpApplicationTest {
         //
         DecisionResponse response = makeDecision();
         assertThat(response).isNotNull();
-        assertThat(response.getPolicies().size()).isEqualTo(2);
+        assertThat(response.getPolicies()).hasSize(2);
         //
         // Validate it
         //
@@ -308,7 +307,7 @@ public class OptimizationPdpApplicationTest {
         DecisionResponse response = makeDecision();
 
         assertThat(response).isNotNull();
-        assertThat(response.getPolicies().size()).isEqualTo(3);
+        assertThat(response.getPolicies()).hasSize(3);
         //
         // Validate it
         //
@@ -331,7 +330,7 @@ public class OptimizationPdpApplicationTest {
         DecisionResponse response = makeDecision();
 
         assertThat(response).isNotNull();
-        assertThat(response.getPolicies().size()).isEqualTo(6);
+        assertThat(response.getPolicies()).hasSize(6);
         //
         // Validate it
         //
@@ -405,7 +404,7 @@ public class OptimizationPdpApplicationTest {
         DecisionResponse response = makeDecision();
 
         assertThat(response).isNotNull();
-        assertThat(response.getPolicies().size()).isEqualTo(7);
+        assertThat(response.getPolicies()).hasSize(7);
         //
         // Validate it
         //
@@ -428,7 +427,7 @@ public class OptimizationPdpApplicationTest {
         DecisionResponse response = makeDecision();
 
         assertThat(response).isNotNull();
-        assertThat(response.getPolicies().size()).isEqualTo(1);
+        assertThat(response.getPolicies()).hasSize(1);
         //
         // Validate it
         //
@@ -452,7 +451,7 @@ public class OptimizationPdpApplicationTest {
         DecisionResponse response = makeDecision();
 
         assertThat(response).isNotNull();
-        assertThat(response.getPolicies().size()).isEqualTo(2);
+        assertThat(response.getPolicies()).hasSize(2);
         //
         // Validate it
         //
@@ -516,7 +515,7 @@ public class OptimizationPdpApplicationTest {
             LOGGER.info("Decision Returned Policy {}", entrySet.getKey());
             assertThat(entrySet.getValue()).isInstanceOf(Map.class);
             Map<String, Object> policyContents = (Map<String, Object>) entrySet.getValue();
-            assertThat(policyContents.containsKey("properties")).isTrue();
+            assertThat(policyContents).containsKey("properties");
             assertThat(policyContents.get("properties")).isInstanceOf(Map.class);
             Map<String, Object> policyProperties = (Map<String, Object>) policyContents.get("properties");
 
diff --git a/main/src/test/java/org/onap/policy/pdpx/main/rest/XacmlPdpApplicationManagerTest.java b/main/src/test/java/org/onap/policy/pdpx/main/rest/XacmlPdpApplicationManagerTest.java
index 243c9eab..2a85579c 100644
--- a/main/src/test/java/org/onap/policy/pdpx/main/rest/XacmlPdpApplicationManagerTest.java
+++ b/main/src/test/java/org/onap/policy/pdpx/main/rest/XacmlPdpApplicationManagerTest.java
@@ -95,7 +95,7 @@ public class XacmlPdpApplicationManagerTest {
         // We need at least 1 policies
         //
         assertThat(completedJtst).isNotNull();
-        assertThat(completedJtst.getToscaTopologyTemplate().getPolicies().size()).isGreaterThan(0);
+        assertThat(completedJtst.getToscaTopologyTemplate().getPolicies().size()).isPositive();
         //
         // Copy test directory over of the application directories
         //
@@ -141,7 +141,7 @@ public class XacmlPdpApplicationManagerTest {
         // Test the basics from the startup
         //
         assertThat(manager).isNotNull();
-        assertThat(manager.getPolicyCount()).isEqualTo(0);
+        assertThat(manager.getPolicyCount()).isZero();
         assertThat(manager.getPolicyTypeCount()).isEqualTo(19);
         assertThat(manager.getToscaPolicies()).isEmpty();
         assertThat(manager.getToscaPolicyIdentifiers()).isEmpty();
@@ -172,11 +172,11 @@ public class XacmlPdpApplicationManagerTest {
         final ToscaPolicy policyFinal = policy;
         assertThatCode(() -> {
             manager.removeUndeployedPolicy(policyFinal);
-            assertThat(manager.getPolicyCount()).isEqualTo(0);
+            assertThat(manager.getPolicyCount()).isZero();
             manager.loadDeployedPolicy(policyFinal);
             assertThat(manager.getPolicyCount()).isEqualTo(1);
             manager.removeUndeployedPolicy(policyFinal);
-            assertThat(manager.getPolicyCount()).isEqualTo(0);
+            assertThat(manager.getPolicyCount()).isZero();
         }).doesNotThrowAnyException();
         //
         // try loading something unsupported
diff --git a/main/src/test/java/org/onap/policy/pdpx/main/rest/serialization/TestXacmlJsonMessageBodyHandler.java b/main/src/test/java/org/onap/policy/pdpx/main/rest/serialization/TestXacmlJsonMessageBodyHandler.java
index 0b77650c..1dbbff9d 100644
--- a/main/src/test/java/org/onap/policy/pdpx/main/rest/serialization/TestXacmlJsonMessageBodyHandler.java
+++ b/main/src/test/java/org/onap/policy/pdpx/main/rest/serialization/TestXacmlJsonMessageBodyHandler.java
@@ -22,7 +22,6 @@ package org.onap.policy.pdpx.main.rest.serialization;
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
-import static org.junit.Assert.assertTrue;
 
 import com.att.research.xacml.api.Request;
 import com.att.research.xacml.api.RequestAttributes;
diff --git a/main/src/test/java/org/onap/policy/pdpx/main/rest/serialization/TestXacmlXmlMessageBodyHandler.java b/main/src/test/java/org/onap/policy/pdpx/main/rest/serialization/TestXacmlXmlMessageBodyHandler.java
index ba2bd780..f2e4f4f6 100644
--- a/main/src/test/java/org/onap/policy/pdpx/main/rest/serialization/TestXacmlXmlMessageBodyHandler.java
+++ b/main/src/test/java/org/onap/policy/pdpx/main/rest/serialization/TestXacmlXmlMessageBodyHandler.java
@@ -22,7 +22,6 @@ package org.onap.policy.pdpx.main.rest.serialization;
 
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
-import static org.junit.Assert.assertTrue;
 
 import com.att.research.xacml.api.Request;
 import com.att.research.xacml.api.RequestAttributes;