1 /* 2 * Copyright (C) 2007 The Guava Authors 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.google.common.primitives; 18 19 import com.google.common.collect.ImmutableSet; 20 import com.google.common.testing.NullPointerTester; 21 22 import junit.framework.TestCase; 23 24 import java.util.Set; 25 26 /** 27 * Unit test for {@link Primitives}. 28 * 29 * @author Kevin Bourrillion 30 */ 31 public class PrimitivesTest extends TestCase { 32 public void testIsWrapperType() { 33 assertTrue(Primitives.isWrapperType(Void.class)); 34 assertFalse(Primitives.isWrapperType(void.class)); 35 } 36 37 public void testWrap() { 38 assertSame(Integer.class, Primitives.wrap(int.class)); 39 assertSame(Integer.class, Primitives.wrap(Integer.class)); 40 assertSame(String.class, Primitives.wrap(String.class)); 41 } 42 43 public void testUnwrap() { 44 assertSame(int.class, Primitives.unwrap(Integer.class)); 45 assertSame(int.class, Primitives.unwrap(int.class)); 46 assertSame(String.class, Primitives.unwrap(String.class)); 47 } 48 49 public void testAllPrimitiveTypes() { 50 Set<Class<?>> primitives = Primitives.allPrimitiveTypes(); 51 assertEquals( 52 ImmutableSet.<Object>of( 53 boolean.class, byte.class, char.class, double.class, 54 float.class, int.class, long.class, short.class, void.class), 55 primitives); 56 57 try { 58 primitives.remove(boolean.class); 59 fail(); 60 } catch (UnsupportedOperationException expected) { 61 } 62 } 63 64 public void testAllWrapperTypes() { 65 Set<Class<?>> wrappers = Primitives.allWrapperTypes(); 66 assertEquals( 67 ImmutableSet.<Object>of( 68 Boolean.class, Byte.class, Character.class, Double.class, 69 Float.class, Integer.class, Long.class, Short.class, Void.class), 70 wrappers); 71 72 try { 73 wrappers.remove(Boolean.class); 74 fail(); 75 } catch (UnsupportedOperationException expected) { 76 } 77 } 78 79 public void testNullPointerExceptions() { 80 NullPointerTester tester = new NullPointerTester(); 81 tester.testAllPublicStaticMethods(Primitives.class); 82 } 83 } 84
