67 lines
2.2 KiB
Java
67 lines
2.2 KiB
Java
/*
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* Copyright (C) 2006 The Guava Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.google.common.base;
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import com.google.common.annotations.GwtCompatible;
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import com.google.common.annotations.GwtIncompatible;
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import com.google.common.testing.NullPointerTester;
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import junit.framework.TestCase;
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/**
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* Tests for {@link Objects}.
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*
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* @author Laurence Gonsalves
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*/
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@GwtCompatible(emulated = true)
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public class ObjectsTest extends TestCase {
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public void testEqual() throws Exception {
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assertTrue(Objects.equal(1, 1));
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assertTrue(Objects.equal(null, null));
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// test distinct string objects
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String s1 = "foobar";
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String s2 = new String(s1);
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assertTrue(Objects.equal(s1, s2));
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assertFalse(Objects.equal(s1, null));
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assertFalse(Objects.equal(null, s1));
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assertFalse(Objects.equal("foo", "bar"));
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assertFalse(Objects.equal("1", 1));
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}
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public void testHashCode() throws Exception {
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int h1 = Objects.hashCode(1, "two", 3.0);
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int h2 = Objects.hashCode(new Integer(1), new String("two"), new Double(3.0));
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// repeatable
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assertEquals(h1, h2);
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// These don't strictly need to be true, but they're nice properties.
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assertTrue(Objects.hashCode(1, 2, null) != Objects.hashCode(1, 2));
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assertTrue(Objects.hashCode(1, 2, null) != Objects.hashCode(1, null, 2));
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assertTrue(Objects.hashCode(1, null, 2) != Objects.hashCode(1, 2));
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assertTrue(Objects.hashCode(1, 2, 3) != Objects.hashCode(3, 2, 1));
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assertTrue(Objects.hashCode(1, 2, 3) != Objects.hashCode(2, 3, 1));
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}
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@GwtIncompatible // NullPointerTester
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public void testNullPointers() {
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NullPointerTester tester = new NullPointerTester();
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tester.testAllPublicStaticMethods(Objects.class);
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}
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}
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