| /* |
| * Copyright 2012-present Facebook, Inc. |
| * |
| * 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 com.facebook.buck.graph; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertFalse; |
| import static org.junit.Assert.assertTrue; |
| |
| import com.google.common.collect.HashMultimap; |
| |
| import org.junit.Test; |
| |
| public class HashMultimapTest { |
| |
| /** |
| * The specification on {@link HashMultimap} is silent on whether |
| * {@link HashMultimap#remove(Object, Object)} removes the key from the Multimap if the key/value |
| * pair is the last entry for the key in the map. This test verifies this behavior as |
| * {@link MutableDirectedGraph} depends on it. |
| */ |
| @Test |
| public void testRemoveLastEntryRemovesKey() { |
| HashMultimap<String, String> edges = HashMultimap.create(); |
| edges.put("A", "B"); |
| edges.put("A", "C"); |
| edges.put("A", "D"); |
| assertEquals(3, edges.size()); |
| assertTrue(edges.containsKey("A")); |
| |
| edges.remove("A", "B"); |
| edges.remove("A", "C"); |
| edges.remove("A", "D"); |
| assertEquals(0, edges.size()); |
| assertFalse(edges.containsKey("A")); |
| } |
| } |