| /* |
| * Copyright 2016 Google 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.google.gwt.emultest.java8.util; |
| |
| import com.google.gwt.emultest.java.util.EmulTestBase; |
| |
| import java.util.Collections; |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.Map.Entry; |
| |
| /** |
| * Tests for java.util.Map implementing classes Java 8 API emulation. |
| */ |
| abstract class AbstractJava8MapTest extends EmulTestBase { |
| |
| private Map<String, String> testSample; |
| |
| @Override |
| protected void gwtSetUp() throws Exception { |
| super.gwtSetUp(); |
| testSample = createTestSample(); |
| } |
| |
| public void testCompute() { |
| Map<String, String> map = createTestMap(); |
| |
| String value = map.compute("a", (k, v) -> k + " - " + v); |
| assertEquals("a - A", value); |
| assertTrue(map.containsKey("a")); |
| assertEquals("a - A", map.get("a")); |
| |
| value = map.compute("a", (k, v) -> null); |
| assertNull(value); |
| assertFalse(map.containsKey("a")); |
| |
| value = map.compute("a", (k, v) -> { |
| assertNull(v); |
| return k.toUpperCase(); |
| }); |
| assertEquals("A", value); |
| assertTrue(map.containsKey("a")); |
| assertEquals("A", map.get("a")); |
| } |
| |
| public void testComputeIfAbsent() { |
| Map<String, String> map = createTestMap(); |
| |
| String value = map.computeIfAbsent("a", k -> { |
| fail(); |
| return null; |
| }); |
| assertEquals("A", value); |
| assertTrue(map.containsKey("a")); |
| assertEquals("A", map.get("a")); |
| |
| map.remove("a"); |
| value = map.computeIfAbsent("a", String::toUpperCase); |
| assertEquals("A", value); |
| assertTrue(map.containsKey("a")); |
| assertEquals("A", map.get("a")); |
| |
| map.remove("a"); |
| value = map.computeIfAbsent("a", k -> null); |
| assertNull(value); |
| assertFalse(map.containsKey("a")); |
| } |
| |
| public void testComputeIfPresent() { |
| Map<String, String> map = createTestMap(); |
| |
| String value = map.computeIfPresent("a", (k, v) -> k + " - " + v); |
| assertEquals("a - A", value); |
| assertTrue(map.containsKey("a")); |
| assertEquals("a - A", map.get("a")); |
| |
| value = map.computeIfPresent("a", (k, v) -> null); |
| assertNull(value); |
| assertFalse(map.containsKey("a")); |
| |
| value = map.computeIfPresent("a", (k, v) -> { |
| fail(); |
| return null; |
| }); |
| assertNull(value); |
| assertFalse(map.containsKey("a")); |
| } |
| |
| public void testForeach() { |
| Map<String, String> map = createTestMap(); |
| Map<String, String> expected = new HashMap<>(testSample); |
| |
| assertEquals(expected.size(), map.size()); |
| map.forEach((k, v) -> { |
| assertTrue(expected.containsKey(k)); |
| assertEquals(expected.get(k), v); |
| expected.remove(k); |
| }); |
| assertTrue(expected.isEmpty()); |
| } |
| |
| public void testGetOrDefault() { |
| Map<String, String> map = createTestMap(); |
| |
| String value = map.getOrDefault("a", null); |
| assertEquals("A", value); |
| assertTrue(map.containsKey("a")); |
| assertEquals("A", map.get("a")); |
| |
| map.remove("a"); |
| value = map.getOrDefault("a", "A"); |
| assertEquals("A", value); |
| assertFalse(map.containsKey("a")); |
| assertNull(map.get("a")); |
| |
| map.put("a", null); |
| value = map.getOrDefault("a", "A"); |
| assertNull(value); |
| assertTrue(map.containsKey("a")); |
| assertNull(map.get("a")); |
| } |
| |
| public void testMerge() { |
| Map<String, String> map = createTestMap(); |
| |
| String newValue = map.merge("a", "a", (currentValue, value) -> { |
| assertEquals("A", currentValue); |
| assertEquals("a", value); |
| return value; |
| }); |
| assertEquals(newValue, "a"); |
| assertTrue(map.containsKey("a")); |
| assertEquals("a", map.get("a")); |
| |
| try { |
| map.merge("a", null, (currentValue, value) -> ""); |
| fail(); |
| } catch (NullPointerException expected) { |
| } |
| |
| newValue = map.merge("a", "", (currentValue, value) -> null); |
| assertNull(newValue); |
| assertFalse(map.containsKey("a")); |
| assertNull(map.get("a")); |
| |
| newValue = map.merge("a", "A", (currentValue, value) -> value); |
| assertEquals("A", newValue); |
| assertTrue(map.containsKey("a")); |
| assertEquals("A", map.get("a")); |
| } |
| |
| public void testPutIfAbsent() { |
| Map<String, String> map = createTestMap(); |
| |
| String oldValue = map.putIfAbsent("a", "a"); |
| assertEquals("A", oldValue); |
| assertTrue(map.containsKey("a")); |
| assertEquals("A", map.get("a")); |
| |
| map.remove("a"); |
| oldValue = map.putIfAbsent("a", "a"); |
| assertNull(oldValue); |
| assertTrue(map.containsKey("a")); |
| assertEquals("a", map.get("a")); |
| } |
| |
| public void testRemove() { |
| Map<String, String> map = createTestMap(); |
| |
| assertFalse(map.remove("a", "a")); |
| assertTrue(map.containsKey("a")); |
| assertEquals("A", map.get("a")); |
| |
| assertTrue(map.remove("a", "A")); |
| assertFalse(map.containsKey("a")); |
| |
| assertFalse(map.remove("a", null)); |
| |
| map.put("a", null); |
| assertTrue(map.remove("a", null)); |
| assertFalse(map.containsKey("a")); |
| } |
| |
| public void testReplace() { |
| Map<String, String> map = createTestMap(); |
| |
| String oldValue = map.replace("a", "a"); |
| assertEquals("A", oldValue); |
| assertTrue(map.containsKey("a")); |
| assertEquals("a", map.get("a")); |
| |
| map.remove("a"); |
| oldValue = map.replace("a", "A"); |
| assertNull(oldValue); |
| assertFalse(map.containsKey("a")); |
| assertNull(map.get("a")); |
| } |
| |
| public void testReplace_Key_OldValue_NewValue() { |
| Map<String, String> map = createTestMap(); |
| |
| assertTrue(map.replace("a", "A", "a")); |
| assertTrue(map.containsKey("a")); |
| assertEquals("a", map.get("a")); |
| |
| assertFalse(map.replace("a", "A", "a")); |
| |
| assertTrue(map.replace("a", "a", null)); |
| assertTrue(map.containsKey("a")); |
| assertNull(map.get("a")); |
| |
| map.remove("a"); |
| assertFalse(map.replace("a", "a", "A")); |
| assertFalse(map.containsKey("a")); |
| assertNull(map.get("a")); |
| } |
| |
| public void testReplaceAll() { |
| Map<String, String> map = createTestMap(); |
| map.replaceAll((k, v) -> v.toLowerCase()); |
| |
| assertEquals(testSample.size(), map.size()); |
| for (Entry<String, String> entry : testSample.entrySet()) { |
| assertTrue(map.containsKey(entry.getKey())); |
| assertEquals(map.get(entry.getKey()), entry.getValue().toLowerCase()); |
| } |
| } |
| |
| private Map<String, String> createTestMap() { |
| Map<String, String> map = createMap(); |
| map.putAll(testSample); |
| return map; |
| } |
| |
| private static Map<String, String> createTestSample() { |
| Map<String, String> map = new HashMap<>(); |
| map.put("a", "A"); |
| map.put("b", "B"); |
| map.put("c", "C"); |
| return Collections.unmodifiableMap(map); |
| } |
| |
| protected abstract Map<String, String> createMap(); |
| |
| } |