[ONOS-3164] UT for port chain codec

Change-Id: If2347f4862a548bc12b37df7ee878a922d48568a

+/*
+ * Copyright 2015 Open Networking Laboratory
+ *
+ * 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.
+ */
+package org.onosproject.vtnweb.web;
+
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.is;
+import static org.hamcrest.Matchers.notNullValue;
+
+import java.io.IOException;
+import java.io.InputStream;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.onosproject.codec.JsonCodec;
+import org.onosproject.vtnrsc.PortChain;
+import org.onosproject.vtnrsc.PortChainId;
+import org.onosproject.vtnrsc.TenantId;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import com.fasterxml.jackson.databind.node.ObjectNode;
+
+/**
+ * Flow rule codec unit tests.
+ */
+public class PortChainCodecTest {
+
+    SfcCodecContext context;
+    JsonCodec<PortChain> portChainCodec;
+    /**
+     * Sets up for each test.  Creates a context and fetches the flow rule
+     * codec.
+     */
+    @Before
+    public void setUp() {
+        context = new SfcCodecContext();
+        portChainCodec = context.codec(PortChain.class);
+        assertThat(portChainCodec, notNullValue());
+    }
+
+    /**
+     * Reads in a rule from the given resource and decodes it.
+     *
+     * @param resourceName resource to use to read the JSON for the rule
+     * @return decoded flow rule
+     * @throws IOException if processing the resource fails
+     */
+    private PortChain getPortChain(String resourceName) throws IOException {
+        InputStream jsonStream = PortChainCodecTest.class
+                .getResourceAsStream(resourceName);
+        ObjectMapper mapper = new ObjectMapper();
+        JsonNode json = mapper.readTree(jsonStream);
+        assertThat(json, notNullValue());
+        PortChain portChain = portChainCodec.decode((ObjectNode) json, context);
+        assertThat(portChain, notNullValue());
+        return portChain;
+    }
+
+    /**
+     * Checks that a simple rule decodes properly.
+     *
+     * @throws IOException if the resource cannot be processed
+     */
+    @Test
+    public void codecPortChainTest() throws IOException {
+
+        PortChain portChain = getPortChain("portChain.json");
+
+        assertThat(portChain, notNullValue());
+
+        PortChainId portChainId = PortChainId.of("1278dcd4-459f-62ed-754b-87fc5e4a6751");
+        TenantId tenantId = TenantId.tenantId("d382007aa9904763a801f68ecf065cf5");
+
+        assertThat(portChain.portChainId().toString(), is(portChainId.toString()));
+        assertThat(portChain.name(), is("PC2"));
+        assertThat(portChain.tenantId().toString(), is(tenantId.toString()));
+        assertThat(portChain.description(), is("Two flows and two port-pair-groups"));
+
+        assertThat(portChain.flowClassifiers(), notNullValue());
+        assertThat(portChain.portPairGroups(), notNullValue());
+    }
+}

+{
+    "id": "1278dcd4-459f-62ed-754b-87fc5e4a6751",
+    "name": "PC2",
+    "tenant_id": "d382007aa9904763a801f68ecf065cf5",
+    "description": "Two flows and two port-pair-groups",
+    "flow_classifiers": [
+        "456a4a34-2e9c-14ae-37fb-765feae2eb05",
+        "4a334cd4-fe9c-4fae-af4b-321c5e2eb051"
+    ],
+    "port_pair_groups": [
+        "4512d643-24fc-4fae-af4b-321c5e2eb3d1",
+        "4a634d49-76dc-4fae-af4b-321c5e23d651"
+    ]
+}