Unit tests for the flow objective store

Change-Id: I6223d973bba5e680396c338a3d8d0663a028d02b
diff --git a/core/store/dist/src/test/java/org/onosproject/store/flowobjective/impl/DistributedFlowObjectiveStoreTest.java b/core/store/dist/src/test/java/org/onosproject/store/flowobjective/impl/DistributedFlowObjectiveStoreTest.java
new file mode 100644
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+++ b/core/store/dist/src/test/java/org/onosproject/store/flowobjective/impl/DistributedFlowObjectiveStoreTest.java
@@ -0,0 +1,63 @@
+/*
+ * 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.store.flowobjective.impl;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import org.onosproject.net.behaviour.DefaultNextGroup;
+import org.onosproject.net.behaviour.NextGroup;
+import org.onosproject.net.flowobjective.FlowObjectiveStore;
+import org.onosproject.store.service.TestStorageService;
+
+import com.google.common.base.Charsets;
+import static org.hamcrest.MatcherAssert.assertThat;
+import static org.hamcrest.Matchers.*;
+
+/**
+ * Unit tests for distributed flow objective store.
+ */
+public class DistributedFlowObjectiveStoreTest {
+    DistributedFlowObjectiveStore storeImpl;
+    FlowObjectiveStore store;
+
+    @Before
+    public void setUp() {
+        storeImpl = new DistributedFlowObjectiveStore();
+        storeImpl.storageService = new TestStorageService();
+        storeImpl.activate();
+        store = storeImpl;
+    }
+
+    @After
+    public void tearDown() {
+        storeImpl.deactivate();
+    }
+
+    @Test
+    public void testFlowObjectiveStore() {
+        NextGroup group2 = new DefaultNextGroup("2".getBytes(Charsets.US_ASCII));
+        int group1Id = store.allocateNextId();
+        int group2Id = store.allocateNextId();
+
+        NextGroup group1add = store.getNextGroup(group1Id);
+        assertThat(group1add, nullValue());
+
+        store.putNextGroup(group2Id, group2);
+        NextGroup group2Query = store.getNextGroup(group2Id);
+        assertThat(group2Query.data(), is(group2.data()));
+    }
+}