Adding code for managing life cycle of SDC Client

* Adding init/start/stop methods in SDCReceptionHandler for managing lifecycle of SDC Client.
* Adding a handler status enum to hold all the possible status values.
* Adding test cases to cover code changes fully.

Change-Id: Ib6f370485ff330538bfada6030c592629ed3fd1c
Issue-ID: POLICY-956
Signed-off-by: ramverma <ram.krishna.verma@ericsson.com>

2 files changed, 200 insertions, 6 deletions

diff --git a/plugins/reception-plugins/src/test/java/org/onap/policy/distribution/reception/handling/sdc/PssdConfigurationTest.java b/plugins/reception-plugins/src/test/java/org/onap/policy/distribution/reception/handling/sdc/TestSdcConfiguration.java
index 5c24a792..e1ba00cf 100644
--- a/plugins/reception-plugins/src/test/java/org/onap/policy/distribution/reception/handling/sdc/PssdConfigurationTest.java
+++ b/plugins/reception-plugins/src/test/java/org/onap/policy/distribution/reception/handling/sdc/TestSdcConfiguration.java
@@ -30,19 +30,20 @@ import com.google.gson.GsonBuilder;
 
 import java.io.FileReader;
 import java.io.IOException;
+import java.util.Arrays;
 
 import org.junit.Test;
 import org.onap.policy.common.parameters.GroupValidationResult;
 import org.onap.policy.distribution.reception.parameters.PssdConfigurationParametersGroup;
 
-/*-
- * Tests for PssdConfiguration class
+/**
+ * Class to perform unit test of {@link SdcConfiguration}.
  *
  */
-public class PssdConfigurationTest {
+public class TestSdcConfiguration {
 
     @Test
-    public void testPssdConfigurationParametersGroup() throws IOException {
+    public void testSdcConfiguration() throws IOException {
         PssdConfigurationParametersGroup configParameters = null;
         try {
             final Gson gson = new GsonBuilder().create();
@@ -53,13 +54,26 @@ public class PssdConfigurationTest {
         }
         final GroupValidationResult validationResult = configParameters.validate();
         assertTrue(validationResult.isValid());
-        final PssdConfiguration config = new PssdConfiguration(configParameters);
+        final SdcConfiguration config = new SdcConfiguration(configParameters);
+        assertEquals(Arrays.asList("a.com", "b.com", "c.com"), config.getMsgBusAddress());
+        assertEquals(Arrays.asList("TOSCA_CSAR", "HEAT"), config.getRelevantArtifactTypes());
+        assertEquals("localhost", config.getAsdcAddress());
+        assertEquals("policy", config.getUser());
+        assertEquals("policy", config.getPassword());
         assertEquals(20, config.getPollingInterval());
         assertEquals(30, config.getPollingTimeout());
+        assertEquals("policy-id", config.getConsumerID());
+        assertEquals("policy-group", config.getConsumerGroup());
+        assertEquals("TEST", config.getEnvironmentName());
+        assertEquals("null", config.getKeyStorePath());
+        assertEquals("null", config.getKeyStorePassword());
+        assertEquals(false, config.activateServerTLSAuth());
+        assertEquals(true, config.isFilterInEmptyResources());
+        assertEquals(false, config.isUseHttpsWithDmaap());
     }
 
     @Test
-    public void testInvalidPssdConfigurationParametersGroup() throws IOException {
+    public void testInvalidSdcConfiguration() throws IOException {
         PssdConfigurationParametersGroup configParameters = null;
         try {
             final Gson gson = new GsonBuilder().create();
diff --git a/plugins/reception-plugins/src/test/java/org/onap/policy/distribution/reception/handling/sdc/TestSdcReceptionHandler.java b/plugins/reception-plugins/src/test/java/org/onap/policy/distribution/reception/handling/sdc/TestSdcReceptionHandler.java
new file mode 100644
index 00000000..02b83849
--- /dev/null
+++ b/plugins/reception-plugins/src/test/java/org/onap/policy/distribution/reception/handling/sdc/TestSdcReceptionHandler.java
@@ -0,0 +1,180 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2018 Intel. All rights reserved.
+ * ================================================================================
+ * 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.distribution.reception.handling.sdc;
+
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
+import static org.mockito.Matchers.any;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+
+import java.io.FileReader;
+import java.io.IOException;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.Mockito;
+import org.mockito.runners.MockitoJUnitRunner;
+import org.onap.policy.common.logging.flexlogger.FlexLogger;
+import org.onap.policy.common.logging.flexlogger.Logger;
+import org.onap.policy.common.parameters.ParameterService;
+import org.onap.policy.distribution.reception.decoding.PluginInitializationException;
+import org.onap.policy.distribution.reception.decoding.PluginTerminationException;
+import org.onap.policy.distribution.reception.parameters.PssdConfigurationParametersGroup;
+import org.onap.sdc.api.results.IDistributionClientResult;
+import org.onap.sdc.impl.mock.DistributionClientStubImpl;
+import org.onap.sdc.utils.DistributionActionResultEnum;
+
+/**
+ * Class to perform unit test of {@link SdcReceptionHandler}.
+ *
+ * @author Ram Krishna Verma (ram.krishna.verma@ericsson.com)
+ */
+@RunWith(MockitoJUnitRunner.class)
+public class TestSdcReceptionHandler {
+
+    private static final Logger LOGGER = FlexLogger.getLogger(TestSdcReceptionHandler.class);
+
+    @Mock
+    private IDistributionClientResult successfulClientInitResult;
+    @Mock
+    private IDistributionClientResult failureClientInitResult;
+    @Mock
+    private DistributionClientStubImpl distributionClient;
+
+    private PssdConfigurationParametersGroup pssdConfigParameters;
+    private SdcReceptionHandler sypHandler;
+
+    /**
+     * Setup for the test cases.
+     *
+     * @throws IOException if it occurs
+     */
+    @Before
+    public final void init() throws IOException {
+        final Gson gson = new GsonBuilder().create();
+        pssdConfigParameters = gson.fromJson(new FileReader("src/test/resources/handling-sdc.json"),
+                PssdConfigurationParametersGroup.class);
+        ParameterService.register(pssdConfigParameters);
+        final SdcReceptionHandler sdcHandler = new SdcReceptionHandler();
+        sypHandler = Mockito.spy(sdcHandler);
+        Mockito.when(sypHandler.createSdcDistributionClient()).thenReturn(distributionClient);
+        Mockito.when(distributionClient.init(any(), any())).thenReturn(successfulClientInitResult);
+        Mockito.when(distributionClient.start()).thenReturn(successfulClientInitResult);
+        Mockito.when(distributionClient.stop()).thenReturn(successfulClientInitResult);
+        Mockito.when(successfulClientInitResult.getDistributionActionResult())
+                .thenReturn(DistributionActionResultEnum.SUCCESS);
+    }
+
+    @After
+    public void teardown() {
+        ParameterService.deregister(pssdConfigParameters);
+    }
+
+    @Test
+    public final void testInitializeSdcClient() {
+        try {
+            sypHandler.initializeReception(pssdConfigParameters.getName());
+        } catch (final PluginInitializationException exp) {
+            LOGGER.error(exp);
+            fail("Test should not throw any exception");
+        }
+    }
+
+    @Test
+    public final void testInitializeSdcClient_Again() throws PluginInitializationException {
+        sypHandler.initializeReception(pssdConfigParameters.getName());
+        try {
+            sypHandler.initializeReception(pssdConfigParameters.getName());
+            fail("Test must throw an exception here");
+        } catch (final Exception exp) {
+            assertTrue(exp.getMessage().startsWith("The SDC Client is already initialized"));
+        }
+    }
+
+    @Test
+    public final void testInitializeSdcClient_Failure() throws PluginInitializationException {
+
+        Mockito.when(successfulClientInitResult.getDistributionActionResult())
+                .thenReturn(DistributionActionResultEnum.FAIL);
+        try {
+            sypHandler.initializeReception(pssdConfigParameters.getName());
+            fail("Test must throw an exception here");
+        } catch (final Exception exp) {
+            assertTrue(exp.getMessage().startsWith("SDC client initialization failed with reason"));
+        }
+    }
+
+    @Test
+    public final void testStartSdcClient_Failure() throws PluginInitializationException {
+        try {
+            Mockito.when(distributionClient.start()).thenReturn(failureClientInitResult);
+            Mockito.when(failureClientInitResult.getDistributionActionResult())
+                    .thenReturn(DistributionActionResultEnum.FAIL);
+            sypHandler.initializeReception(pssdConfigParameters.getName());
+
+            fail("Test must throw an exception here");
+        } catch (final Exception exp) {
+            assertTrue(exp.getMessage().startsWith("SDC client start failed with reason"));
+        }
+    }
+
+    @Test
+    public final void testStopSdcClient() {
+        try {
+            sypHandler.initializeReception(pssdConfigParameters.getName());
+            sypHandler.destroy();
+        } catch (final PluginInitializationException | PluginTerminationException exp) {
+            LOGGER.error(exp);
+            fail("Test should not throw any exception");
+        }
+
+    }
+
+    @Test
+    public final void testStopSdcClientWithoutStart() {
+        try {
+            sypHandler.destroy();
+        } catch (final PluginTerminationException exp) {
+            LOGGER.error(exp);
+            fail("Test should not throw any exception");
+        }
+
+    }
+
+    @Test
+    public final void testStopSdcClient_Failure() throws PluginInitializationException {
+
+        sypHandler.initializeReception(pssdConfigParameters.getName());
+        Mockito.when(successfulClientInitResult.getDistributionActionResult())
+                .thenReturn(DistributionActionResultEnum.FAIL);
+        try {
+            sypHandler.destroy();
+            fail("Test must throw an exception here");
+        } catch (final Exception exp) {
+            assertTrue(exp.getMessage().startsWith("SDC client stop failed with reason"));
+        }
+    }
+}