P4Runtime unit tests for api, ctl, model modules

Change-Id: Iac1b1ef6e274c355ce3a26cffbd8adcb39694f69
diff --git a/protocols/p4runtime/model/src/test/java/org/onosproject/p4runtime/model/P4CounterModelTest.java b/protocols/p4runtime/model/src/test/java/org/onosproject/p4runtime/model/P4CounterModelTest.java
new file mode 100644
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+++ b/protocols/p4runtime/model/src/test/java/org/onosproject/p4runtime/model/P4CounterModelTest.java
@@ -0,0 +1,78 @@
+/*
+ * Copyright 2017-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.p4runtime.model;
+
+import com.google.common.testing.EqualsTester;
+import org.junit.Test;
+import org.onosproject.net.pi.model.PiCounterId;
+import org.onosproject.net.pi.model.PiCounterModel;
+import org.onosproject.net.pi.model.PiCounterType;
+import org.onosproject.net.pi.model.PiTableId;
+
+import static org.onlab.junit.ImmutableClassChecker.assertThatClassIsImmutable;
+
+/**
+ * Test for P4CounterModel class.
+ */
+public class P4CounterModelTest {
+    private static final String TABLE_0 = "table0";
+    private static final String WCMP_TABLE = "wcmp_table";
+
+    private final PiTableId tableId = PiTableId.of(TABLE_0);
+    private final PiTableId sameAsTableId = PiTableId.of(TABLE_0);
+    private final PiTableId tableId2 = PiTableId.of(WCMP_TABLE);
+
+    private final PiCounterId counterId = PiCounterId.of("name");
+
+    private final P4CounterModel counterModel = new P4CounterModel(counterId, PiCounterType.DIRECT,
+                                                                   PiCounterModel.Unit.BYTES, tableId, 16);
+
+    private final P4CounterModel sameAsCounterModel = new P4CounterModel(counterId, PiCounterType.DIRECT,
+                                                                         PiCounterModel.Unit.BYTES, sameAsTableId, 16);
+
+    private final P4CounterModel counterModel2 = new P4CounterModel(counterId, PiCounterType.INDIRECT,
+                                                                    PiCounterModel.Unit.BYTES, tableId, 16);
+
+    private final P4CounterModel counterModel3 = new P4CounterModel(counterId, PiCounterType.DIRECT,
+                                                                    PiCounterModel.Unit.PACKETS, tableId, 16);
+
+    private final P4CounterModel counterModel4 = new P4CounterModel(counterId, PiCounterType.DIRECT,
+                                                                    PiCounterModel.Unit.BYTES, tableId2, 16);
+
+    private final P4CounterModel counterModel5 = new P4CounterModel(counterId, PiCounterType.DIRECT,
+                                                                    PiCounterModel.Unit.BYTES, tableId, 32);
+    /**
+     * Checks that the P4CounterModel class is immutable.
+     */
+    @Test
+    public void testImmutability() {
+        assertThatClassIsImmutable(P4CounterModel.class);
+    }
+
+    /**
+     * Checks the operation of equals(), hashCode() and toString() methods.
+     */
+    @Test
+    public void testEquals() {
+        new EqualsTester()
+                .addEqualityGroup(counterModel, sameAsCounterModel)
+                .addEqualityGroup(counterModel2)
+                .addEqualityGroup(counterModel3)
+                .addEqualityGroup(counterModel4)
+                .addEqualityGroup(counterModel5)
+                .testEquals();
+    }
+}
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