11d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert/* 21d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * Copyright (C) 2006 The Guava Authors 31d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * 41d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * Licensed under the Apache License, Version 2.0 (the "License"); 51d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * you may not use this file except in compliance with the License. 61d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * You may obtain a copy of the License at 71d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * 81d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * http://www.apache.org/licenses/LICENSE-2.0 91d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * 101d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * Unless required by applicable law or agreed to in writing, software 111d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * distributed under the License is distributed on an "AS IS" BASIS, 121d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 131d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * See the License for the specific language governing permissions and 141d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * limitations under the License. 151d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert */ 161d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 171d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertpackage com.google.common.base; 181d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 191d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertimport com.google.common.annotations.GwtCompatible; 201d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertimport com.google.common.annotations.GwtIncompatible; 211d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertimport com.google.common.testing.NullPointerTester; 221d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 231d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertimport junit.framework.TestCase; 241d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 251d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert/** 261d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * Tests for {@link Objects}. 271d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * 281d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert * @author Laurence Gonsalves 291d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert */ 301d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert@GwtCompatible(emulated = true) 311d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringertpublic class ObjectsTest extends TestCase { 320888a09821a98ac0680fad765217302858e70fa4Paul Duffin 331d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public void testEqual() throws Exception { 341d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertTrue(Objects.equal(1, 1)); 351d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertTrue(Objects.equal(null, null)); 361d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 371d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert // test distinct string objects 381d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert String s1 = "foobar"; 391d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert String s2 = new String(s1); 401d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertTrue(Objects.equal(s1, s2)); 411d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 421d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertFalse(Objects.equal(s1, null)); 431d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertFalse(Objects.equal(null, s1)); 441d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertFalse(Objects.equal("foo", "bar")); 451d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertFalse(Objects.equal("1", 1)); 461d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 471d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 481d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public void testHashCode() throws Exception { 491d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert int h1 = Objects.hashCode(1, "two", 3.0); 500888a09821a98ac0680fad765217302858e70fa4Paul Duffin int h2 = Objects.hashCode( 510888a09821a98ac0680fad765217302858e70fa4Paul Duffin new Integer(1), new String("two"), new Double(3.0)); 521d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert // repeatable 531d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertEquals(h1, h2); 541d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 551d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert // These don't strictly need to be true, but they're nice properties. 561d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertTrue(Objects.hashCode(1, 2, null) != Objects.hashCode(1, 2)); 571d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertTrue(Objects.hashCode(1, 2, null) != Objects.hashCode(1, null, 2)); 581d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertTrue(Objects.hashCode(1, null, 2) != Objects.hashCode(1, 2)); 591d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertTrue(Objects.hashCode(1, 2, 3) != Objects.hashCode(3, 2, 1)); 601d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertTrue(Objects.hashCode(1, 2, 3) != Objects.hashCode(2, 3, 1)); 611d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 621d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 631d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public void testFirstNonNull_withNonNull() throws Exception { 641d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert String s1 = "foo"; 651d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert String s2 = Objects.firstNonNull(s1, "bar"); 661d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertSame(s1, s2); 671d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 681d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert Long n1 = new Long(42); 691d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert Long n2 = Objects.firstNonNull(null, n1); 701d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert assertSame(n1, n2); 711d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 721d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 731d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert public void testFirstNonNull_throwsNullPointerException() throws Exception { 741d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert try { 751d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert Objects.firstNonNull(null, null); 761d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert fail("expected NullPointerException"); 771d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } catch (NullPointerException expected) { 781d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 791d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 801d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert 811d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert @GwtIncompatible("NullPointerTester") 827dd252788645e940eada959bdde927426e2531c9Paul Duffin public void testNullPointers() { 831d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert NullPointerTester tester = new NullPointerTester(); 841d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert tester.testAllPublicStaticMethods(Objects.class); 851d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert } 861d580d0f6ee4f21eb309ba7b509d2c6d671c4044Bjorn Bringert} 87