Add unit tests for GenericDiscreteResources

Change-Id: Ic69ab69c684d51907e245100aab474a6da50bedf

+/*
+ * Copyright 2016-present 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.resource.impl;
+
+import com.google.common.collect.ImmutableSet;
+import org.junit.Test;
+import org.onosproject.net.DeviceId;
+import org.onosproject.net.resource.DiscreteResource;
+import org.onosproject.net.resource.Resources;
+
+import java.util.Optional;
+
+import static org.hamcrest.Matchers.is;
+import static org.junit.Assert.assertThat;
+
+public class GenericDiscreteResourcesTest {
+    @Test
+    public void testIfResourceIsFound() {
+        DiscreteResource res1 = Resources.discrete(DeviceId.deviceId("a")).resource();
+
+        DiscreteResources sut = GenericDiscreteResources.of(ImmutableSet.of(res1));
+
+        assertThat(sut.lookup(res1.id()), is(Optional.of(res1)));
+    }
+
+    @Test
+    public void testIfResourceIsNotFound() {
+        DiscreteResource res1 = Resources.discrete(DeviceId.deviceId("a")).resource();
+        DiscreteResource res2 = Resources.discrete(DeviceId.deviceId("b")).resource();
+
+        DiscreteResources sut = GenericDiscreteResources.of(ImmutableSet.of(res1));
+
+        assertThat(sut.lookup(res2.id()), is(Optional.empty()));
+    }
+
+    @Test
+    public void testIfDifferenceIsEmpty() {
+        DiscreteResource res1 = Resources.discrete(DeviceId.deviceId("a")).resource();
+        DiscreteResource res2 = Resources.discrete(DeviceId.deviceId("b")).resource();
+
+        DiscreteResources sut = GenericDiscreteResources.of(ImmutableSet.of(res1, res2));
+
+        DiscreteResources other = GenericDiscreteResources.of(ImmutableSet.of(res1, res2));
+
+        DiscreteResources expected = GenericDiscreteResources.of(ImmutableSet.of());
+        assertThat(sut.difference(other), is(expected));
+    }
+
+    @Test
+    public void testIfDifferenceIsNotEmpty() {
+        DiscreteResource res1 = Resources.discrete(DeviceId.deviceId("a")).resource();
+        DiscreteResource res2 = Resources.discrete(DeviceId.deviceId("b")).resource();
+
+        DiscreteResources sut = GenericDiscreteResources.of(ImmutableSet.of(res1, res2));
+
+        DiscreteResources other = GenericDiscreteResources.of(ImmutableSet.of(res1));
+
+        DiscreteResources expected = GenericDiscreteResources.of(ImmutableSet.of(res2));
+        assertThat(sut.difference(other), is(expected));
+    }
+
+    @Test
+    public void testIfDifferenceIsNotChanged() {
+        DiscreteResource res1 = Resources.discrete(DeviceId.deviceId("a")).resource();
+        DiscreteResource res2 = Resources.discrete(DeviceId.deviceId("b")).resource();
+
+        DiscreteResources sut = GenericDiscreteResources.of(ImmutableSet.of(res1));
+
+        DiscreteResources other = GenericDiscreteResources.of(ImmutableSet.of(res2));
+
+        DiscreteResources expected = GenericDiscreteResources.of(ImmutableSet.of(res1));
+        assertThat(sut.difference(other), is(expected));
+    }
+
+    @Test
+    public void testDifferenceFromEmpty() {
+        DiscreteResource res1 = Resources.discrete(DeviceId.deviceId("a")).resource();
+
+        DiscreteResources sut = GenericDiscreteResources.of(ImmutableSet.of(res1));
+
+        DiscreteResources other = GenericDiscreteResources.of(ImmutableSet.of());
+
+        DiscreteResources expected = GenericDiscreteResources.of(ImmutableSet.of(res1));
+        assertThat(sut.difference(other), is(expected));
+    }
+
+    @Test
+    public void testEmpty() {
+        DiscreteResources sut = GenericDiscreteResources.of(ImmutableSet.of());
+
+        assertThat(sut.isEmpty(), is(true));
+    }
+
+    @Test
+    public void testNotEmpty() {
+        DiscreteResource res1 = Resources.discrete(DeviceId.deviceId("a")).resource();
+
+        DiscreteResources sut = GenericDiscreteResources.of(ImmutableSet.of(res1));
+
+        assertThat(sut.isEmpty(), is(false));
+    }
+
+    @Test
+    public void testIfResourceIsContained() {
+        DiscreteResource res1 = Resources.discrete(DeviceId.deviceId("a")).resource();
+
+        DiscreteResources sut = GenericDiscreteResources.of(ImmutableSet.of(res1));
+
+        assertThat(sut.containsAny(ImmutableSet.of(res1)), is(true));
+    }
+
+    @Test
+    public void testIfResourceIsNotContained() {
+        DiscreteResource res1 = Resources.discrete(DeviceId.deviceId("a")).resource();
+        DiscreteResource res2 = Resources.discrete(DeviceId.deviceId("b")).resource();
+
+        DiscreteResources sut = GenericDiscreteResources.of(ImmutableSet.of(res1));
+
+        assertThat(sut.containsAny(ImmutableSet.of(res2)), is(false));
+    }
+
+    @Test
+    public void testContainsWithEmpty() {
+        DiscreteResource res1 = Resources.discrete(DeviceId.deviceId("a")).resource();
+
+        DiscreteResources sut = GenericDiscreteResources.of(ImmutableSet.of(res1));
+
+        assertThat(sut.containsAny(ImmutableSet.of()), is(false));
+    }
+
+    @Test
+    public void testAdd() {
+        DiscreteResource res1 = Resources.discrete(DeviceId.deviceId("a")).resource();
+        DiscreteResource res2 = Resources.discrete(DeviceId.deviceId("b")).resource();
+
+        DiscreteResources sut = GenericDiscreteResources.of(ImmutableSet.of(res1));
+
+        DiscreteResources other = GenericDiscreteResources.of(ImmutableSet.of(res2));
+
+        DiscreteResources expected = GenericDiscreteResources.of(ImmutableSet.of(res1, res2));
+        assertThat(sut.add(other), is(expected));
+    }
+
+    @Test
+    public void testValues() {
+        DiscreteResource res1 = Resources.discrete(DeviceId.deviceId("a")).resource();
+        DiscreteResource res2 = Resources.discrete(DeviceId.deviceId("b")).resource();
+
+        DiscreteResources sut = GenericDiscreteResources.of(ImmutableSet.of(res1, res2));
+
+        assertThat(sut.values(), is(ImmutableSet.of(res1, res2)));
+    }
+}