Add a set of codecs for kubevirt network with unit test cases

Change-Id: I0734a085258236f524d0d251ab71056eb5602dc4
diff --git a/apps/kubevirt-networking/app/src/test/java/org/onosproject/kubevirtnetworking/codec/KubevirtNetworkJsonArrayMatcher.java b/apps/kubevirt-networking/app/src/test/java/org/onosproject/kubevirtnetworking/codec/KubevirtNetworkJsonArrayMatcher.java
new file mode 100644
index 0000000..6701c7b
--- /dev/null
+++ b/apps/kubevirt-networking/app/src/test/java/org/onosproject/kubevirtnetworking/codec/KubevirtNetworkJsonArrayMatcher.java
@@ -0,0 +1,68 @@
+/*
+ * Copyright 2021-present Open Networking 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.
+ */
+package org.onosproject.kubevirtnetworking.codec;
+
+import com.eclipsesource.json.JsonArray;
+import com.eclipsesource.json.JsonObject;
+import org.hamcrest.Description;
+import org.hamcrest.TypeSafeMatcher;
+import org.onosproject.kubevirtnetworking.api.KubevirtNetwork;
+
+public final class KubevirtNetworkJsonArrayMatcher extends TypeSafeMatcher<JsonArray> {
+
+    private final KubevirtNetwork network;
+    private String reason = "";
+
+    public KubevirtNetworkJsonArrayMatcher(KubevirtNetwork network) {
+        this.network = network;
+    }
+
+    @Override
+    protected boolean matchesSafely(JsonArray json) {
+        boolean networkFound = false;
+        for (int jsonNetworkIndex = 0; jsonNetworkIndex < json.size(); jsonNetworkIndex++) {
+            final JsonObject jsonNode = json.get(jsonNetworkIndex).asObject();
+
+            final String networkId = network.networkId();
+            final String jsonNetworkId = jsonNode.get("networkId").asString();
+            if (jsonNetworkId.equals(networkId)) {
+                networkFound = true;
+            }
+        }
+
+        if (!networkFound) {
+            reason = "Network with networkId " + network.networkId() + " not found";
+            return false;
+        } else {
+            return true;
+        }
+    }
+
+    @Override
+    public void describeTo(Description description) {
+        description.appendText(reason);
+    }
+
+    /**
+     * Factory to allocate a network array matcher.
+     *
+     * @param network network object we are looking for
+     * @return matcher
+     */
+    public static KubevirtNetworkJsonArrayMatcher hasNetwork(KubevirtNetwork network) {
+        return new KubevirtNetworkJsonArrayMatcher(network);
+    }
+}