Create basic structure of pap component

1) Creating the basic code structure of pap component which includes
main sub-module having Main, PapActivator, PapCommandLineArguments,
PapParameterGroup & PapParameterHandler. Along with few exception
classes. Basicalliy the structure follows the pattern developed in
policy/distribution component.

2) Created the related unit test cases and required test resources.

Change-Id: I67c82f9d072e6c8a306cb983accb693da70e58a2
Issue-ID: POLICY-1476
Signed-off-by: ramverma <ram.krishna.verma@est.tech>

6 files changed, 441 insertions, 0 deletions

diff --git a/main/src/test/java/org/onap/policy/pap/main/TestExceptions.java b/main/src/test/java/org/onap/policy/pap/main/TestExceptions.java
new file mode 100644
index 00000000..b45cdab7
--- /dev/null
+++ b/main/src/test/java/org/onap/policy/pap/main/TestExceptions.java
@@ -0,0 +1,44 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2019 Nordix Foundation.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.pap.main;
+
+import static org.junit.Assert.assertNotNull;
+
+import java.io.IOException;
+
+import org.junit.Test;
+
+/**
+ * Class to perform unit test of {@link PolicyPapException PolicyPapRuntimeException}}.
+ *
+ * @author Ram Krishna Verma (ram.krishna.verma@est.tech)
+ */
+public class TestExceptions {
+
+    @Test
+    public void test() {
+        assertNotNull(new PolicyPapException("Message"));
+        assertNotNull(new PolicyPapException("Message", new IOException()));
+
+        assertNotNull(new PolicyPapRuntimeException("Message"));
+        assertNotNull(new PolicyPapRuntimeException("Message", new IOException()));
+    }
+}
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
new file mode 100644
index 00000000..5e62ba68
--- /dev/null
+++ b/main/src/test/java/org/onap/policy/pap/main/parameters/CommonTestData.java
@@ -0,0 +1,32 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2019 Nordix Foundation.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.pap.main.parameters;
+
+/**
+ * Class to hold/create all parameters for test cases.
+ *
+ * @author Ram Krishna Verma (ram.krishna.verma@est.tech)
+ */
+public class CommonTestData {
+
+    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
new file mode 100644
index 00000000..086d7c22
--- /dev/null
+++ b/main/src/test/java/org/onap/policy/pap/main/parameters/TestPapParameterGroup.java
@@ -0,0 +1,73 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2019 Nordix Foundation.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.pap.main.parameters;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
+import org.junit.Test;
+import org.onap.policy.common.parameters.GroupValidationResult;
+
+/**
+ * Class to perform unit test of {@link PapParameterGroup}.
+ *
+ * @author Ram Krishna Verma (ram.krishna.verma@est.tech)
+ */
+public class TestPapParameterGroup {
+
+    @Test
+    public void testPapParameterGroup() {
+        final PapParameterGroup papParameters = new PapParameterGroup(CommonTestData.PAP_GROUP_NAME);
+        final GroupValidationResult validationResult = papParameters.validate();
+        assertTrue(validationResult.isValid());
+        assertEquals(CommonTestData.PAP_GROUP_NAME, papParameters.getName());
+    }
+
+    @Test
+    public void testPapParameterGroup_NullName() {
+        final PapParameterGroup papParameters = new PapParameterGroup(null);
+        final GroupValidationResult validationResult = papParameters.validate();
+        assertFalse(validationResult.isValid());
+        assertEquals(null, papParameters.getName());
+        assertTrue(validationResult.getResult().contains(
+                "field \"name\" type \"java.lang.String\" value \"null\" INVALID, " + "must be a non-blank string"));
+    }
+
+    @Test
+    public void testPapParameterGroup_EmptyName() {
+        final PapParameterGroup papParameters = new PapParameterGroup("");
+        final GroupValidationResult validationResult = papParameters.validate();
+        assertFalse(validationResult.isValid());
+        assertEquals("", papParameters.getName());
+        assertTrue(validationResult.getResult().contains(
+                "field \"name\" type \"java.lang.String\" value \"\" INVALID, " + "must be a non-blank string"));
+    }
+
+    @Test
+    public void testPapParameterGroup_SetName() {
+        final PapParameterGroup papParameters = new PapParameterGroup(CommonTestData.PAP_GROUP_NAME);
+        papParameters.setName("PapNewGroup");
+        final GroupValidationResult validationResult = papParameters.validate();
+        assertTrue(validationResult.isValid());
+        assertEquals("PapNewGroup", papParameters.getName());
+    }
+}
diff --git a/main/src/test/java/org/onap/policy/pap/main/parameters/TestPapParameterHandler.java b/main/src/test/java/org/onap/policy/pap/main/parameters/TestPapParameterHandler.java
new file mode 100644
index 00000000..cb14748d
--- /dev/null
+++ b/main/src/test/java/org/onap/policy/pap/main/parameters/TestPapParameterHandler.java
@@ -0,0 +1,166 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2019 Nordix Foundation.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.pap.main.parameters;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
+
+import org.junit.Test;
+import org.onap.policy.pap.main.PolicyPapException;
+import org.onap.policy.pap.main.startstop.PapCommandLineArguments;
+
+/**
+ * Class to perform unit test of {@link PapParameterHandler}.
+ *
+ * @author Ram Krishna Verma (ram.krishna.verma@est.tech)
+ */
+public class TestPapParameterHandler {
+
+    @Test
+    public void testParameterHandlerNoParameterFile() throws PolicyPapException {
+        final String[] noArgumentString = { "-c", "parameters/NoParameterFile.json" };
+
+        final PapCommandLineArguments noArguments = new PapCommandLineArguments();
+        noArguments.parse(noArgumentString);
+
+        try {
+            new PapParameterHandler().getParameters(noArguments);
+            fail("test should throw an exception here");
+        } catch (final Exception e) {
+            assertTrue(e.getMessage().contains("FileNotFoundException"));
+        }
+    }
+
+    @Test
+    public void testParameterHandlerEmptyParameters() throws PolicyPapException {
+        final String[] emptyArgumentString = { "-c", "parameters/EmptyParameters.json" };
+
+        final PapCommandLineArguments emptyArguments = new PapCommandLineArguments();
+        emptyArguments.parse(emptyArgumentString);
+
+        try {
+            new PapParameterHandler().getParameters(emptyArguments);
+            fail("test should throw an exception here");
+        } catch (final Exception e) {
+            assertEquals("no parameters found in \"parameters/EmptyParameters.json\"", e.getMessage());
+        }
+    }
+
+    @Test
+    public void testParameterHandlerInvalidParameters() throws PolicyPapException {
+        final String[] invalidArgumentString = { "-c", "parameters/InvalidParameters.json" };
+
+        final PapCommandLineArguments invalidArguments = new PapCommandLineArguments();
+        invalidArguments.parse(invalidArgumentString);
+
+        try {
+            new PapParameterHandler().getParameters(invalidArguments);
+            fail("test should throw an exception here");
+        } catch (final Exception e) {
+            assertEquals("error reading parameters from \"parameters/InvalidParameters.json\"\n"
+                    + "(JsonSyntaxException):java.lang.IllegalStateException: "
+                    + "Expected a string but was BEGIN_ARRAY at line 2 column 15 path $.name", e.getMessage());
+        }
+    }
+
+    @Test
+    public void testParameterHandlerNoParameters() throws PolicyPapException {
+        final String[] noArgumentString = { "-c", "parameters/NoParameters.json" };
+
+        final PapCommandLineArguments noArguments = new PapCommandLineArguments();
+        noArguments.parse(noArgumentString);
+
+        try {
+            new PapParameterHandler().getParameters(noArguments);
+            fail("test should throw an exception here");
+        } catch (final Exception e) {
+            assertTrue(e.getMessage().contains(
+                    "field \"name\" type \"java.lang.String\" value \"null\" INVALID, must be a non-blank string"));
+        }
+    }
+
+    @Test
+    public void testParameterHandlerMinumumParameters() throws PolicyPapException {
+        final String[] minArgumentString = { "-c", "parameters/MinimumParameters.json" };
+
+        final PapCommandLineArguments minArguments = new PapCommandLineArguments();
+        minArguments.parse(minArgumentString);
+
+        final PapParameterGroup parGroup = new PapParameterHandler().getParameters(minArguments);
+        assertEquals(CommonTestData.PAP_GROUP_NAME, parGroup.getName());
+    }
+
+    @Test
+    public void testPapParameterGroup() throws PolicyPapException {
+        final String[] papConfigParameters = { "-c", "parameters/PapConfigParameters.json" };
+
+        final PapCommandLineArguments arguments = new PapCommandLineArguments();
+        arguments.parse(papConfigParameters);
+
+        final PapParameterGroup parGroup = new PapParameterHandler().getParameters(arguments);
+        assertTrue(arguments.checkSetConfigurationFilePath());
+        assertEquals(CommonTestData.PAP_GROUP_NAME, parGroup.getName());
+    }
+
+    @Test
+    public void testPapParameterGroup_InvalidName() throws PolicyPapException {
+        final String[] papConfigParameters = { "-c", "parameters/PapConfigParameters_InvalidName.json" };
+
+        final PapCommandLineArguments arguments = new PapCommandLineArguments();
+        arguments.parse(papConfigParameters);
+
+        try {
+            new PapParameterHandler().getParameters(arguments);
+            fail("test should throw an exception here");
+        } catch (final Exception e) {
+            assertTrue(e.getMessage().contains(
+                    "field \"name\" type \"java.lang.String\" value \" \" INVALID, must be a non-blank string"));
+        }
+    }
+
+    @Test
+    public void testPapVersion() throws PolicyPapException {
+        final String[] papConfigParameters = { "-v" };
+        final PapCommandLineArguments arguments = new PapCommandLineArguments();
+        final String version = arguments.parse(papConfigParameters);
+        assertTrue(version.startsWith("ONAP Policy Framework PAP Service"));
+    }
+
+    @Test
+    public void testPapHelp() throws PolicyPapException {
+        final String[] papConfigParameters = { "-h" };
+        final PapCommandLineArguments arguments = new PapCommandLineArguments();
+        final String help = arguments.parse(papConfigParameters);
+        assertTrue(help.startsWith("usage:"));
+    }
+
+    @Test
+    public void testPapInvalidOption() throws PolicyPapException {
+        final String[] papConfigParameters = { "-d" };
+        final PapCommandLineArguments arguments = new PapCommandLineArguments();
+        try {
+            arguments.parse(papConfigParameters);
+        } catch (final Exception exp) {
+            assertTrue(exp.getMessage().startsWith("invalid command line arguments specified"));
+        }
+    }
+}
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
new file mode 100644
index 00000000..8bc544b0
--- /dev/null
+++ b/main/src/test/java/org/onap/policy/pap/main/startstop/TestMain.java
@@ -0,0 +1,72 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2019 Nordix Foundation.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.pap.main.startstop;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+import org.junit.Test;
+import org.onap.policy.pap.main.PolicyPapException;
+import org.onap.policy.pap.main.parameters.CommonTestData;
+
+/**
+ * Class to perform unit test of {@link Main}}.
+ *
+ * @author Ram Krishna Verma (ram.krishna.verma@est.tech)
+ */
+public class TestMain {
+
+    @Test
+    public void testMain() throws PolicyPapException {
+        final String[] papConfigParameters = { "-c", "parameters/PapConfigParameters.json" };
+        final Main 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);
+        assertTrue(main.getParameters() == null);
+    }
+
+    @Test
+    public void testMain_InvalidArguments() {
+        final String[] papConfigParameters = { "parameters/PapConfigParameters.json" };
+        final Main main = new Main(papConfigParameters);
+        assertTrue(main.getParameters() == null);
+    }
+
+    @Test
+    public void testMain_Help() {
+        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);
+        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
new file mode 100644
index 00000000..03c3413a
--- /dev/null
+++ b/main/src/test/java/org/onap/policy/pap/main/startstop/TestPapActivator.java
@@ -0,0 +1,54 @@
+/*-
+ * ============LICENSE_START=======================================================
+ *  Copyright (C) 2019 Nordix Foundation.
+ * ================================================================================
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ * ============LICENSE_END=========================================================
+ */
+
+package org.onap.policy.pap.main.startstop;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+import org.junit.Test;
+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;
+
+
+/**
+ * Class to perform unit test of {@link PapActivator}}.
+ *
+ * @author Ram Krishna Verma (ram.krishna.verma@est.tech)
+ */
+public class TestPapActivator {
+
+    @Test
+    public void testPapActivator() throws PolicyPapException {
+        final String[] papConfigParameters = { "-c", "parameters/PapConfigParameters.json" };
+
+        final PapCommandLineArguments arguments = new PapCommandLineArguments(papConfigParameters);
+
+        final PapParameterGroup parGroup = new PapParameterHandler().getParameters(arguments);
+
+        final PapActivator activator = new PapActivator(parGroup);
+        activator.initialize();
+        assertTrue(activator.getParameterGroup().isValid());
+        assertEquals(CommonTestData.PAP_GROUP_NAME, activator.getParameterGroup().getName());
+        activator.terminate();
+    }
+}