Refactor REST server tests

Refactored the REST server tests so that each controller has
its own test class.
Also ensure things are shutdown by various tests.

Added comments.
Removed unneeded constant.
Updated license.

Modified code that restarts the REST server during tests.

Modified code to just change the activator's "alive" state to
false, leaving the REST server running.

Fixed comment.

Allocated server port.

Removed file that should not have been included.

Changed code to throw exceptions if activator methods are called while
in the wrong state.

Change-Id: I04a3a6654150797c23b3c86a6a39ecf8bb7f5a78
Issue-ID: POLICY-1542
Signed-off-by: Jim Hahn <jrh3@att.com>

8 files changed, 521 insertions, 331 deletions

diff --git a/main/src/test/java/org/onap/policy/pap/main/parameters/CommonTestData.java b/main/src/test/java/org/onap/policy/pap/main/parameters/CommonTestData.java
index 0c28de62..27d8ac2a 100644
--- a/main/src/test/java/org/onap/policy/pap/main/parameters/CommonTestData.java
+++ b/main/src/test/java/org/onap/policy/pap/main/parameters/CommonTestData.java
@@ -1,6 +1,7 @@
 /*-
  * ============LICENSE_START=======================================================
  *  Copyright (C) 2019 Nordix Foundation.
+ *  Modifications Copyright (C) 2019 AT&T Intellectual Property.
  * ================================================================================
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -31,7 +32,7 @@ public class CommonTestData {
     private static final String REST_SERVER_USER = "healthcheck";
     private static final int REST_SERVER_PORT = 6969;
     private static final String REST_SERVER_HOST = "0.0.0.0";
-    private static final boolean REST_SERVER_HTTPS = false;
+    private static final boolean REST_SERVER_HTTPS = true;
     private static final boolean REST_SERVER_AAF = false;
     public static final String PAP_GROUP_NAME = "PapGroup";
 
diff --git a/main/src/test/java/org/onap/policy/pap/main/parameters/TestPapParameterGroup.java b/main/src/test/java/org/onap/policy/pap/main/parameters/TestPapParameterGroup.java
index 5569b65a..4759f646 100644
--- a/main/src/test/java/org/onap/policy/pap/main/parameters/TestPapParameterGroup.java
+++ b/main/src/test/java/org/onap/policy/pap/main/parameters/TestPapParameterGroup.java
@@ -1,6 +1,7 @@
 /*-
  * ============LICENSE_START=======================================================
  *  Copyright (C) 2019 Nordix Foundation.
+ *  Modifications Copyright (C) 2019 AT&T Intellectual Property.
  * ================================================================================
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -47,7 +48,7 @@ public class TestPapParameterGroup {
         assertEquals(restServerParameters.getPort(), papParameters.getRestServerParameters().getPort());
         assertEquals(restServerParameters.getUserName(), papParameters.getRestServerParameters().getUserName());
         assertEquals(restServerParameters.getPassword(), papParameters.getRestServerParameters().getPassword());
-        assertFalse(papParameters.getRestServerParameters().isHttps());
+        assertTrue(papParameters.getRestServerParameters().isHttps());
         assertFalse(papParameters.getRestServerParameters().isAaf());
     }
 
diff --git a/main/src/test/java/org/onap/policy/pap/main/rest/CommonPapRestServer.java b/main/src/test/java/org/onap/policy/pap/main/rest/CommonPapRestServer.java
new file mode 100644
index 00000000..8f522740
--- /dev/null
+++ b/main/src/test/java/org/onap/policy/pap/main/rest/CommonPapRestServer.java
@@ -0,0 +1,285 @@
+/*
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2019 Nordix Foundation.
+ *  Modifications Copyright (C) 2019 AT&T Intellectual Property.
+ * ================================================================================
+ * 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.pap.main.rest;
+
+import static org.junit.Assert.assertTrue;
+
+import java.io.File;
+import java.io.IOException;
+import java.net.InetSocketAddress;
+import java.net.ServerSocket;
+import java.security.SecureRandom;
+import java.security.cert.X509Certificate;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Properties;
+import javax.net.ssl.SSLContext;
+import javax.net.ssl.TrustManager;
+import javax.net.ssl.X509TrustManager;
+import javax.ws.rs.client.Client;
+import javax.ws.rs.client.ClientBuilder;
+import javax.ws.rs.client.Invocation;
+import javax.ws.rs.client.WebTarget;
+import javax.ws.rs.core.MediaType;
+import org.glassfish.jersey.client.authentication.HttpAuthenticationFeature;
+import org.junit.After;
+import org.junit.AfterClass;
+import org.junit.Before;
+import org.junit.BeforeClass;
+import org.onap.policy.common.utils.coder.Coder;
+import org.onap.policy.common.utils.coder.StandardCoder;
+import org.onap.policy.common.utils.network.NetworkUtil;
+import org.onap.policy.pap.main.PolicyPapException;
+import org.onap.policy.pap.main.startstop.Main;
+import org.onap.policy.pap.main.startstop.PapActivator;
+import org.powermock.reflect.Whitebox;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Class to perform unit test of {@link PapRestServer}.
+ *
+ * @author Ram Krishna Verma (ram.krishna.verma@est.tech)
+ */
+public class CommonPapRestServer {
+
+    private static final Logger LOGGER = LoggerFactory.getLogger(CommonPapRestServer.class);
+
+    private static String KEYSTORE = System.getProperty("user.dir") + "/src/test/resources/ssl/policy-keystore";
+
+    private static Coder coder = new StandardCoder();
+
+    public static final String NOT_ALIVE = "not alive";
+    public static final String ALIVE = "alive";
+    public static final String SELF = "self";
+    public static final String NAME = "Policy PAP";
+    public static final String ENDPOINT_PREFIX = "policy/pap/v1/";
+
+    private static int port;
+    protected static String httpsPrefix;
+
+    private static Main main;
+
+    private boolean activatorWasAlive;
+
+    /**
+     * Allocates a port for the server, writes a config file, and then starts Main.
+     *
+     * @throws Exception if an error occurs
+     */
+    @BeforeClass
+    public static void setUpBeforeClass() throws Exception {
+        allocPort();
+
+        httpsPrefix = "https://localhost:" + port + "/";
+
+        makeConfigFile();
+
+        startMain();
+    }
+
+    /**
+     * Stops Main.
+     */
+    @AfterClass
+    public static void teardownAfterClass() {
+        try {
+            stopMain();
+
+        } catch (PolicyPapException exp) {
+            LOGGER.error("cannot stop main", exp);
+        }
+    }
+
+    /**
+     * Set up.
+     *
+     * @throws Exception if an error occurs
+     */
+    @Before
+    public void setUp() throws Exception {
+        // restart, if not currently running
+        if (main == null) {
+            startMain();
+        }
+
+        activatorWasAlive = PapActivator.getCurrent().isAlive();
+    }
+
+    /**
+     * Restores the activator's "alive" state.
+     */
+    @After
+    public void tearDown() {
+        Whitebox.setInternalState(PapActivator.getCurrent(), "alive", activatorWasAlive);
+    }
+
+    /**
+     * Verifies that an endpoint appears within the swagger response.
+     *
+     * @param endpoint the endpoint of interest
+     * @throws Exception if an error occurs
+     */
+    protected void testSwagger(final String endpoint) throws Exception {
+        final Invocation.Builder invocationBuilder = sendFqeRequest(httpsPrefix + "swagger.yaml");
+        final String resp = invocationBuilder.get(String.class);
+
+        assertTrue(resp.contains(ENDPOINT_PREFIX + endpoint + ":"));
+    }
+
+    /**
+     * Allocates a port for the server.
+     *
+     * @throws IOException if an error occurs
+     */
+    private static void allocPort() throws IOException {
+        ServerSocket socket = new ServerSocket();
+        socket.bind(new InetSocketAddress("localhost", 0));
+
+        port = socket.getLocalPort();
+        socket.close();
+    }
+
+    /**
+     * Makes a parameter configuration file.
+     *
+     * @throws Exception if an error occurs
+     */
+    private static void makeConfigFile() throws Exception {
+        Map<String, Object> params = new HashMap<>();
+        params.put("host", "0.0.0.0");
+        params.put("port", port);
+        params.put("userName", "healthcheck");
+        params.put("password", "zb!XztG34");
+        params.put("https", true);
+
+        Map<String, Object> config = new HashMap<>();
+        config.put("name", "PapGroup");
+        config.put("restServerParameters", params);
+
+        File file = new File("src/test/resources/parameters/TestConfigParams.json");
+        file.deleteOnExit();
+
+        coder.encode(file, config);
+    }
+
+    /**
+     * Starts the "Main".
+     *
+     * @throws Exception if an error occurs
+     */
+    private static void startMain() throws Exception {
+        // make sure port is available
+        if (NetworkUtil.isTcpPortOpen("localhost", port, 1, 1L)) {
+            throw new IllegalStateException("port " + port + " is still in use");
+        }
+
+        final Properties systemProps = System.getProperties();
+        systemProps.put("javax.net.ssl.keyStore", KEYSTORE);
+        systemProps.put("javax.net.ssl.keyStorePassword", "Pol1cy_0nap");
+        System.setProperties(systemProps);
+
+        final String[] papConfigParameters = new String[2];
+        papConfigParameters[0] = "-c";
+        papConfigParameters[1] = "src/test/resources/parameters/TestConfigParams.json";
+
+        main = new Main(papConfigParameters);
+
+        if (!NetworkUtil.isTcpPortOpen("localhost", port, 6, 10000L)) {
+            throw new IllegalStateException("server is not listening on port " + port);
+        }
+    }
+
+    /**
+     * Stops the "Main".
+     *
+     * @throws Exception if an error occurs
+     */
+    private static void stopMain() throws PolicyPapException {
+        if (main != null) {
+            Main main2 = main;
+            main = null;
+
+            main2.shutdown();
+        }
+    }
+
+    /**
+     * Mark the activator as dead, but leave its REST server running.
+     */
+    protected void markActivatorDead() {
+        Whitebox.setInternalState(PapActivator.getCurrent(), "alive", false);
+    }
+
+    /**
+     * Sends a request to an endpoint.
+     *
+     * @param endpoint the target endpoint
+     * @return a request builder
+     * @throws Exception if an error occurs
+     */
+    protected Invocation.Builder sendRequest(final String endpoint) throws Exception {
+        return sendFqeRequest(httpsPrefix + ENDPOINT_PREFIX + endpoint);
+    }
+
+    /**
+     * Sends a request to a fully qualified endpoint.
+     *
+     * @param endpoint the fully qualified target endpoint
+     * @return a request builder
+     * @throws Exception if an error occurs
+     */
+    protected Invocation.Builder sendFqeRequest(final String fullyQualifiedEndpoint) throws Exception {
+
+        // @formatter:off
+        final TrustManager[] noopTrustManager = new TrustManager[] {
+            new X509TrustManager() {
+
+                @Override
+                public X509Certificate[] getAcceptedIssuers() {
+                    return new X509Certificate[0];
+                }
+
+                @Override
+                public void checkClientTrusted(final java.security.cert.X509Certificate[] certs,
+                                final String authType) {}
+
+                @Override
+                public void checkServerTrusted(final java.security.cert.X509Certificate[] certs,
+                                final String authType) {}
+            }
+        };
+        // @formatter:on
+
+        final SSLContext sc = SSLContext.getInstance("TLSv1.2");
+        sc.init(null, noopTrustManager, new SecureRandom());
+        final ClientBuilder clientBuilder =
+                        ClientBuilder.newBuilder().sslContext(sc).hostnameVerifier((host, session) -> true);
+        final Client client = clientBuilder.build();
+        final HttpAuthenticationFeature feature = HttpAuthenticationFeature.basic("healthcheck", "zb!XztG34");
+        client.register(feature);
+
+        final WebTarget webTarget = client.target(fullyQualifiedEndpoint);
+
+        return webTarget.request(MediaType.APPLICATION_JSON);
+    }
+}
diff --git a/main/src/test/java/org/onap/policy/pap/main/rest/TestHealthCheckRestControllerV1.java b/main/src/test/java/org/onap/policy/pap/main/rest/TestHealthCheckRestControllerV1.java
new file mode 100644
index 00000000..0ddfb3b5
--- /dev/null
+++ b/main/src/test/java/org/onap/policy/pap/main/rest/TestHealthCheckRestControllerV1.java
@@ -0,0 +1,69 @@
+/*
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2019 Nordix Foundation.
+ *  Modifications Copyright (C) 2019 AT&T Intellectual Property.
+ * ================================================================================
+ * 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.pap.main.rest;
+
+import static org.junit.Assert.assertEquals;
+
+import javax.ws.rs.client.Invocation;
+import org.junit.Test;
+import org.onap.policy.common.endpoints.report.HealthCheckReport;
+
+/**
+ * Class to perform unit test of {@link PapRestServer}.
+ *
+ * @author Ram Krishna Verma (ram.krishna.verma@est.tech)
+ */
+public class TestHealthCheckRestControllerV1 extends CommonPapRestServer {
+
+    private static final String HEALTHCHECK_ENDPOINT = "healthcheck";
+
+    @Test
+    public void testSwagger() throws Exception {
+        super.testSwagger(HEALTHCHECK_ENDPOINT);
+    }
+
+    @Test
+    public void testHealthCheckSuccess() throws Exception {
+        final Invocation.Builder invocationBuilder = sendRequest(HEALTHCHECK_ENDPOINT);
+        final HealthCheckReport report = invocationBuilder.get(HealthCheckReport.class);
+        validateHealthCheckReport(NAME, SELF, true, 200, ALIVE, report);
+    }
+
+    @Test
+    public void testHealthCheck_500() throws Exception {
+
+        markActivatorDead();
+
+        final Invocation.Builder invocationBuilder = sendRequest(HEALTHCHECK_ENDPOINT);
+        final HealthCheckReport report = invocationBuilder.get(HealthCheckReport.class);
+        validateHealthCheckReport(NAME, SELF, false, 500, NOT_ALIVE, report);
+    }
+
+    private void validateHealthCheckReport(final String name, final String url, final boolean healthy, final int code,
+            final String message, final HealthCheckReport report) {
+        assertEquals(name, report.getName());
+        assertEquals(url, report.getUrl());
+        assertEquals(healthy, report.isHealthy());
+        assertEquals(code, report.getCode());
+        assertEquals(message, report.getMessage());
+    }
+}
diff --git a/main/src/test/java/org/onap/policy/pap/main/rest/TestPapRestServer.java b/main/src/test/java/org/onap/policy/pap/main/rest/TestPapRestServer.java
deleted file mode 100644
index 77ac8f1e..00000000
--- a/main/src/test/java/org/onap/policy/pap/main/rest/TestPapRestServer.java
+++ /dev/null
@@ -1,290 +0,0 @@
-/*-
- * ============LICENSE_START=======================================================
- *  Copyright (C) 2019 Nordix Foundation.
- *  Modifications Copyright (C) 2019 AT&T Intellectual Property.
- * ================================================================================
- * 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.pap.main.rest;
-
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertTrue;
-import static org.junit.Assert.fail;
-
-import java.io.IOException;
-import java.lang.reflect.Constructor;
-import java.lang.reflect.Modifier;
-import java.security.SecureRandom;
-import java.security.cert.X509Certificate;
-import java.util.Properties;
-
-import javax.net.ssl.SSLContext;
-import javax.net.ssl.TrustManager;
-import javax.net.ssl.X509TrustManager;
-import javax.ws.rs.client.Client;
-import javax.ws.rs.client.ClientBuilder;
-import javax.ws.rs.client.Invocation;
-import javax.ws.rs.client.WebTarget;
-import javax.ws.rs.core.MediaType;
-
-import org.glassfish.jersey.client.ClientConfig;
-import org.glassfish.jersey.client.authentication.HttpAuthenticationFeature;
-import org.junit.After;
-import org.junit.Test;
-import org.onap.policy.common.endpoints.report.HealthCheckReport;
-import org.onap.policy.common.utils.network.NetworkUtil;
-import org.onap.policy.pap.main.PolicyPapException;
-import org.onap.policy.pap.main.parameters.CommonTestData;
-import org.onap.policy.pap.main.parameters.RestServerParameters;
-import org.onap.policy.pap.main.startstop.Main;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
-/**
- * Class to perform unit test of {@link PapRestServer}.
- *
- * @author Ram Krishna Verma (ram.krishna.verma@est.tech)
- */
-public class TestPapRestServer {
-
-    private static final Logger LOGGER = LoggerFactory.getLogger(TestPapRestServer.class);
-    private static final String NOT_ALIVE = "not alive";
-    private static final String ALIVE = "alive";
-    private static final String SELF = "self";
-    private static final String NAME = "Policy PAP";
-    private static final String HEALTHCHECK_ENDPOINT = "healthcheck";
-    private static final String STATISTICS_ENDPOINT = "statistics";
-    private static String KEYSTORE = System.getProperty("user.dir") + "/src/test/resources/ssl/policy-keystore";
-    private Main main;
-    private PapRestServer restServer;
-
-    /**
-     * Method for cleanup after each test.
-     */
-    @After
-    public void teardown() {
-        PapStatisticsManager.getInstance().resetAllStatistics();
-
-        try {
-            if (NetworkUtil.isTcpPortOpen("localhost", 6969, 1, 1000L)) {
-                if (main != null) {
-                    stopPapService(main);
-                } else if (restServer != null) {
-                    restServer.stop();
-                }
-            }
-        } catch (InterruptedException | IOException | PolicyPapException exp) {
-            LOGGER.error("teardown failed", exp);
-        }
-    }
-
-    @Test
-    public void testHealthCheckSuccess() {
-        try {
-            main = startPapService(true);
-            final Invocation.Builder invocationBuilder = sendHttpRequest(HEALTHCHECK_ENDPOINT);
-            final HealthCheckReport report = invocationBuilder.get(HealthCheckReport.class);
-            validateHealthCheckReport(NAME, SELF, true, 200, ALIVE, report);
-        } catch (final Exception exp) {
-            LOGGER.error("testHealthCheckSuccess failed", exp);
-            fail("Test should not throw an exception");
-        }
-    }
-
-    @Test
-    public void testHealthCheckFailure() throws Exception {
-        final RestServerParameters restServerParams = new CommonTestData().getRestServerParameters(false);
-        restServerParams.setName(CommonTestData.PAP_GROUP_NAME);
-        restServer = new PapRestServer(restServerParams);
-        restServer.start();
-        final Invocation.Builder invocationBuilder = sendHttpRequest(HEALTHCHECK_ENDPOINT);
-        final HealthCheckReport report = invocationBuilder.get(HealthCheckReport.class);
-        validateHealthCheckReport(NAME, SELF, false, 500, NOT_ALIVE, report);
-        assertTrue(restServer.isAlive());
-        assertTrue(restServer.toString().startsWith("PapRestServer [servers="));
-    }
-
-    @Test
-    public void testHttpsHealthCheckSuccess() {
-        try {
-            main = startPapService(false);
-            final Invocation.Builder invocationBuilder = sendHttpsRequest(HEALTHCHECK_ENDPOINT);
-            final HealthCheckReport report = invocationBuilder.get(HealthCheckReport.class);
-            validateHealthCheckReport(NAME, SELF, true, 200, ALIVE, report);
-        } catch (final Exception exp) {
-            LOGGER.error("testHttpsHealthCheckSuccess failed", exp);
-            fail("Test should not throw an exception");
-        }
-    }
-
-    @Test
-    public void testPapStatistics_200() {
-        try {
-            main = startPapService(true);
-            Invocation.Builder invocationBuilder = sendHttpRequest(STATISTICS_ENDPOINT);
-            StatisticsReport report = invocationBuilder.get(StatisticsReport.class);
-            validateStatisticsReport(report, 0, 200);
-            updateDistributionStatistics();
-            invocationBuilder = sendHttpRequest(STATISTICS_ENDPOINT);
-            report = invocationBuilder.get(StatisticsReport.class);
-            validateStatisticsReport(report, 1, 200);
-        } catch (final Exception exp) {
-            LOGGER.error("testPapStatistics_200 failed", exp);
-            fail("Test should not throw an exception");
-        }
-    }
-
-    @Test
-    public void testPapStatistics_500() {
-        final RestServerParameters restServerParams = new CommonTestData().getRestServerParameters(false);
-        restServerParams.setName(CommonTestData.PAP_GROUP_NAME);
-        restServer = new PapRestServer(restServerParams);
-        try {
-            restServer.start();
-            final Invocation.Builder invocationBuilder = sendHttpRequest(STATISTICS_ENDPOINT);
-            final StatisticsReport report = invocationBuilder.get(StatisticsReport.class);
-            validateStatisticsReport(report, 0, 500);
-        } catch (final Exception exp) {
-            LOGGER.error("testPapStatistics_500 failed", exp);
-            fail("Test should not throw an exception");
-        }
-    }
-
-    @Test
-    public void testHttpsPapStatistic() {
-        try {
-            main = startPapService(false);
-            final Invocation.Builder invocationBuilder = sendHttpsRequest(STATISTICS_ENDPOINT);
-            final StatisticsReport report = invocationBuilder.get(StatisticsReport.class);
-            validateStatisticsReport(report, 0, 200);
-        } catch (final Exception exp) {
-            LOGGER.error("testHttpsDistributionStatistic failed", exp);
-            fail("Test should not throw an exception");
-        }
-    }
-
-    @Test
-    public void testPapStatisticsConstructorIsProtected() throws Exception {
-        final Constructor<PapStatisticsManager> constructor = PapStatisticsManager.class.getDeclaredConstructor();
-        assertTrue(Modifier.isProtected(constructor.getModifiers()));
-    }
-
-    private Main startPapService(final boolean http) {
-        final String[] papConfigParameters = new String[2];
-        if (http) {
-            papConfigParameters[0] = "-c";
-            papConfigParameters[1] = "parameters/PapConfigParameters.json";
-        } else {
-            final Properties systemProps = System.getProperties();
-            systemProps.put("javax.net.ssl.keyStore", KEYSTORE);
-            systemProps.put("javax.net.ssl.keyStorePassword", "Pol1cy_0nap");
-            System.setProperties(systemProps);
-            papConfigParameters[0] = "-c";
-            papConfigParameters[1] = "parameters/PapConfigParameters_Https.json";
-        }
-        return new Main(papConfigParameters);
-    }
-
-    private void stopPapService(final Main main) throws PolicyPapException {
-        main.shutdown();
-    }
-
-    private Invocation.Builder sendHttpRequest(final String endpoint) throws Exception {
-        final ClientConfig clientConfig = new ClientConfig();
-
-        final HttpAuthenticationFeature feature = HttpAuthenticationFeature.basic("healthcheck", "zb!XztG34");
-        clientConfig.register(feature);
-
-        final Client client = ClientBuilder.newClient(clientConfig);
-        final WebTarget webTarget = client.target("http://localhost:6969/policy/pap/v1/" + endpoint);
-
-        final Invocation.Builder invocationBuilder = webTarget.request(MediaType.APPLICATION_JSON);
-
-        if (!NetworkUtil.isTcpPortOpen("localhost", 6969, 6, 10000L)) {
-            throw new IllegalStateException("cannot connect to port 6969");
-        }
-        return invocationBuilder;
-    }
-
-    private Invocation.Builder sendHttpsRequest(final String endpoint) throws Exception {
-
-        final TrustManager[] noopTrustManager = new TrustManager[] { new X509TrustManager() {
-
-            @Override
-            public X509Certificate[] getAcceptedIssuers() {
-                return new X509Certificate[0];
-            }
-
-            @Override
-            public void checkClientTrusted(final java.security.cert.X509Certificate[] certs, final String authType) {}
-
-            @Override
-            public void checkServerTrusted(final java.security.cert.X509Certificate[] certs, final String authType) {}
-        } };
-
-        final SSLContext sc = SSLContext.getInstance("TLSv1.2");
-        sc.init(null, noopTrustManager, new SecureRandom());
-        final ClientBuilder clientBuilder = ClientBuilder.newBuilder().sslContext(sc).hostnameVerifier((host,
-                session) -> true);
-        final Client client = clientBuilder.build();
-        final HttpAuthenticationFeature feature = HttpAuthenticationFeature.basic("healthcheck", "zb!XztG34");
-        client.register(feature);
-
-        final WebTarget webTarget = client.target("https://localhost:6969/policy/pap/v1/" + endpoint);
-
-        final Invocation.Builder invocationBuilder = webTarget.request(MediaType.APPLICATION_JSON);
-
-        if (!NetworkUtil.isTcpPortOpen("localhost", 6969, 6, 10000L)) {
-            throw new IllegalStateException("cannot connect to port 6969");
-        }
-        return invocationBuilder;
-    }
-
-    private void updateDistributionStatistics() {
-        PapStatisticsManager mgr = PapStatisticsManager.getInstance();
-
-        mgr.updateTotalPdpCount();
-        mgr.updateTotalPdpGroupCount();
-        mgr.updateTotalPolicyDeployCount();
-        mgr.updatePolicyDeploySuccessCount();
-        mgr.updatePolicyDeployFailureCount();
-        mgr.updateTotalPolicyDownloadCount();
-        mgr.updatePolicyDownloadSuccessCount();
-        mgr.updatePolicyDownloadFailureCount();
-    }
-
-    private void validateStatisticsReport(final StatisticsReport report, final int count, final int code) {
-        assertEquals(code, report.getCode());
-        assertEquals(count, report.getTotalPdpCount());
-        assertEquals(count, report.getTotalPdpGroupCount());
-        assertEquals(count, report.getTotalPolicyDeployCount());
-        assertEquals(count, report.getPolicyDeploySuccessCount());
-        assertEquals(count, report.getPolicyDeployFailureCount());
-        assertEquals(count, report.getTotalPolicyDownloadCount());
-        assertEquals(count, report.getPolicyDeploySuccessCount());
-        assertEquals(count, report.getPolicyDeployFailureCount());
-    }
-
-    private void validateHealthCheckReport(final String name, final String url, final boolean healthy, final int code,
-            final String message, final HealthCheckReport report) {
-        assertEquals(name, report.getName());
-        assertEquals(url, report.getUrl());
-        assertEquals(healthy, report.isHealthy());
-        assertEquals(code, report.getCode());
-        assertEquals(message, report.getMessage());
-    }
-}
diff --git a/main/src/test/java/org/onap/policy/pap/main/rest/TestStatisticsRestControllerV1.java b/main/src/test/java/org/onap/policy/pap/main/rest/TestStatisticsRestControllerV1.java
new file mode 100644
index 00000000..de142b51
--- /dev/null
+++ b/main/src/test/java/org/onap/policy/pap/main/rest/TestStatisticsRestControllerV1.java
@@ -0,0 +1,113 @@
+/*
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2019 Nordix Foundation.
+ *  Modifications Copyright (C) 2019 AT&T Intellectual Property.
+ * ================================================================================
+ * 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.pap.main.rest;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+import java.lang.reflect.Constructor;
+import java.lang.reflect.Modifier;
+import javax.ws.rs.client.Invocation;
+import org.junit.Before;
+import org.junit.Test;
+
+/**
+ * Class to perform unit test of {@link PapRestServer}.
+ *
+ * @author Ram Krishna Verma (ram.krishna.verma@est.tech)
+ */
+public class TestStatisticsRestControllerV1 extends CommonPapRestServer {
+
+    private static final String STATISTICS_ENDPOINT = "statistics";
+
+    /**
+     * Set up.
+     *
+     * @throws Exception if an error occurs
+     */
+    @Before
+    public void setUp() throws Exception {
+        super.setUp();
+
+        PapStatisticsManager.getInstance().resetAllStatistics();
+    }
+
+    @Test
+    public void testSwagger() throws Exception {
+        super.testSwagger(STATISTICS_ENDPOINT);
+    }
+
+    @Test
+    public void testPapStatistics_200() throws Exception {
+        Invocation.Builder invocationBuilder = sendRequest(STATISTICS_ENDPOINT);
+        StatisticsReport report = invocationBuilder.get(StatisticsReport.class);
+        validateStatisticsReport(report, 0, 200);
+        updateDistributionStatistics();
+
+        invocationBuilder = sendRequest(STATISTICS_ENDPOINT);
+        report = invocationBuilder.get(StatisticsReport.class);
+        validateStatisticsReport(report, 1, 200);
+    }
+
+    @Test
+    public void testPapStatistics_500() throws Exception {
+
+        markActivatorDead();
+
+        PapStatisticsManager.getInstance().resetAllStatistics();
+
+        Invocation.Builder invocationBuilder = sendRequest(STATISTICS_ENDPOINT);
+        StatisticsReport report = invocationBuilder.get(StatisticsReport.class);
+        validateStatisticsReport(report, 0, 500);
+    }
+
+    @Test
+    public void testPapStatisticsConstructorIsProtected() throws Exception {
+        final Constructor<PapStatisticsManager> constructor = PapStatisticsManager.class.getDeclaredConstructor();
+        assertTrue(Modifier.isProtected(constructor.getModifiers()));
+    }
+
+    private void updateDistributionStatistics() {
+        PapStatisticsManager mgr = PapStatisticsManager.getInstance();
+
+        mgr.updateTotalPdpCount();
+        mgr.updateTotalPdpGroupCount();
+        mgr.updateTotalPolicyDeployCount();
+        mgr.updatePolicyDeploySuccessCount();
+        mgr.updatePolicyDeployFailureCount();
+        mgr.updateTotalPolicyDownloadCount();
+        mgr.updatePolicyDownloadSuccessCount();
+        mgr.updatePolicyDownloadFailureCount();
+    }
+
+    private void validateStatisticsReport(final StatisticsReport report, final int count, final int code) {
+        assertEquals(code, report.getCode());
+        assertEquals(count, report.getTotalPdpCount());
+        assertEquals(count, report.getTotalPdpGroupCount());
+        assertEquals(count, report.getTotalPolicyDeployCount());
+        assertEquals(count, report.getPolicyDeploySuccessCount());
+        assertEquals(count, report.getPolicyDeployFailureCount());
+        assertEquals(count, report.getTotalPolicyDownloadCount());
+        assertEquals(count, report.getPolicyDeploySuccessCount());
+        assertEquals(count, report.getPolicyDeployFailureCount());
+    }
+}
diff --git a/main/src/test/java/org/onap/policy/pap/main/startstop/TestMain.java b/main/src/test/java/org/onap/policy/pap/main/startstop/TestMain.java
index 8bc544b0..1f6b2baf 100644
--- a/main/src/test/java/org/onap/policy/pap/main/startstop/TestMain.java
+++ b/main/src/test/java/org/onap/policy/pap/main/startstop/TestMain.java
@@ -1,6 +1,7 @@
-/*-
+/*
  * ============LICENSE_START=======================================================
  *  Copyright (C) 2019 Nordix Foundation.
+ *  Modifications Copyright (C) 2019 AT&T Intellectual Property.
  * ================================================================================
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -23,6 +24,7 @@ package org.onap.policy.pap.main.startstop;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertTrue;
 
+import org.junit.After;
 import org.junit.Test;
 import org.onap.policy.pap.main.PolicyPapException;
 import org.onap.policy.pap.main.parameters.CommonTestData;
@@ -33,40 +35,55 @@ import org.onap.policy.pap.main.parameters.CommonTestData;
  * @author Ram Krishna Verma (ram.krishna.verma@est.tech)
  */
 public class TestMain {
+    private Main main;
+
+    /**
+     * Shuts "main" down.
+     * @throws Exception if an error occurs
+     */
+    @After
+    public void tearDown() throws Exception {
+        // shut down activator
+        PapActivator activator = PapActivator.getCurrent();
+        if (activator != null && activator.isAlive()) {
+            activator.terminate();
+        }
+    }
 
     @Test
     public void testMain() throws PolicyPapException {
-        final String[] papConfigParameters = { "-c", "parameters/PapConfigParameters.json" };
-        final Main main = new Main(papConfigParameters);
+        final String[] papConfigParameters = {"-c", "parameters/PapConfigParameters.json"};
+        main = new Main(papConfigParameters);
         assertTrue(main.getParameters().isValid());
         assertEquals(CommonTestData.PAP_GROUP_NAME, main.getParameters().getName());
+
         main.shutdown();
     }
 
     @Test
     public void testMain_NoArguments() {
         final String[] papConfigParameters = {};
-        final Main main = new Main(papConfigParameters);
+        main = new Main(papConfigParameters);
         assertTrue(main.getParameters() == null);
     }
 
     @Test
     public void testMain_InvalidArguments() {
-        final String[] papConfigParameters = { "parameters/PapConfigParameters.json" };
-        final Main main = new Main(papConfigParameters);
+        final String[] papConfigParameters = {"parameters/PapConfigParameters.json"};
+        main = new Main(papConfigParameters);
         assertTrue(main.getParameters() == null);
     }
 
     @Test
     public void testMain_Help() {
-        final String[] papConfigParameters = { "-h" };
+        final String[] papConfigParameters = {"-h"};
         Main.main(papConfigParameters);
     }
 
     @Test
     public void testMain_InvalidParameters() {
-        final String[] papConfigParameters = { "-c", "parameters/PapConfigParameters_InvalidName.json" };
-        final Main main = new Main(papConfigParameters);
+        final String[] papConfigParameters = {"-c", "parameters/PapConfigParameters_InvalidName.json"};
+        main = new Main(papConfigParameters);
         assertTrue(main.getParameters() == null);
     }
 }
diff --git a/main/src/test/java/org/onap/policy/pap/main/startstop/TestPapActivator.java b/main/src/test/java/org/onap/policy/pap/main/startstop/TestPapActivator.java
index 8e8e6c09..5e611673 100644
--- a/main/src/test/java/org/onap/policy/pap/main/startstop/TestPapActivator.java
+++ b/main/src/test/java/org/onap/policy/pap/main/startstop/TestPapActivator.java
@@ -21,12 +21,11 @@
 
 package org.onap.policy.pap.main.startstop;
 
+import static org.assertj.core.api.Assertions.assertThatIllegalStateException;
 import static org.junit.Assert.assertEquals;
 import static org.junit.Assert.assertFalse;
-import static org.junit.Assert.assertNotNull;
 import static org.junit.Assert.assertSame;
 import static org.junit.Assert.assertTrue;
-import static org.junit.Assert.fail;
 
 import org.junit.After;
 import org.junit.Before;
@@ -35,8 +34,6 @@ import org.onap.policy.pap.main.PolicyPapException;
 import org.onap.policy.pap.main.parameters.CommonTestData;
 import org.onap.policy.pap.main.parameters.PapParameterGroup;
 import org.onap.policy.pap.main.parameters.PapParameterHandler;
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
 
 
 /**
@@ -46,7 +43,6 @@ import org.slf4j.LoggerFactory;
  */
 public class TestPapActivator {
 
-    private static final Logger LOGGER = LoggerFactory.getLogger(TestPapActivator.class);
     private PapActivator activator;
 
     /**
@@ -63,45 +59,43 @@ public class TestPapActivator {
 
     /**
      * Method for cleanup after each test.
+     * @throws Exception if an error occurs
      */
     @After
-    public void teardown() {
-        try {
-            if (activator != null) {
-                activator.terminate();
-            }
-        } catch (final PolicyPapException exp) {
-            LOGGER.error("teardown failed", exp);
+    public void teardown() throws Exception {
+        if (activator != null && activator.isAlive()) {
+            activator.terminate();
         }
     }
 
     @Test
     public void testPapActivator() throws PolicyPapException {
-        try {
-            assertFalse(activator.isAlive());
-            activator.initialize();
-            assertTrue(activator.isAlive());
-            assertTrue(activator.getParameterGroup().isValid());
-            assertEquals(CommonTestData.PAP_GROUP_NAME, activator.getParameterGroup().getName());
-        } catch (final Exception exp) {
-            LOGGER.error("testPapActivator failed", exp);
-            fail("Test should not throw an exception");
-        }
-    }
-
-    @Test(expected = PolicyPapException.class)
-    public void testPapActivatorError() throws PolicyPapException {
+        assertFalse(activator.isAlive());
         activator.initialize();
+        assertTrue(activator.isAlive());
+        assertTrue(activator.getParameterGroup().isValid());
+        assertEquals(CommonTestData.PAP_GROUP_NAME, activator.getParameterGroup().getName());
+
+        // repeat - should throw an exception
+        assertThatIllegalStateException().isThrownBy(() -> activator.initialize());
+        assertTrue(activator.isAlive());
         assertTrue(activator.getParameterGroup().isValid());
-        activator.initialize();
     }
 
     @Test
     public void testGetCurrent_testSetCurrent() {
-        assertNotNull(PapActivator.getCurrent());
-
         PapActivator.setCurrent(activator);
-
         assertSame(activator, PapActivator.getCurrent());
     }
+
+    @Test
+    public void testTerminate() throws Exception {
+        activator.initialize();
+        activator.terminate();
+        assertFalse(activator.isAlive());
+
+        // repeat - should throw an exception
+        assertThatIllegalStateException().isThrownBy(() -> activator.terminate());
+        assertFalse(activator.isAlive());
+    }
 }