1 /* 2 * Copyright (C) 2020, The Android Open Source Project 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 android.aidl.tests; 18 19 import static org.hamcrest.core.Is.is; 20 import static org.junit.Assert.assertFalse; 21 import static org.junit.Assert.assertThat; 22 import static org.junit.Assert.assertTrue; 23 24 import android.aidl.tests.Union; 25 import android.aidl.tests.UnionWithFd; 26 import android.aidl.tests.unions.EnumUnion; 27 import android.os.Parcel; 28 import android.os.ParcelFileDescriptor; 29 import android.os.Parcelable; 30 import java.io.File; 31 import java.io.FileDescriptor; 32 import java.io.FileNotFoundException; 33 import java.util.Arrays; 34 import java.util.List; 35 import org.junit.Test; 36 import org.junit.runner.RunWith; 37 import org.junit.runners.JUnit4; 38 39 @RunWith(JUnit4.class) 40 public class UnionTests { 41 @Test defaultConstructorInitsWithFirstField()42 public void defaultConstructorInitsWithFirstField() { 43 assertThat(new Union(), is(Union.ns(new int[] {}))); // int[] ns = {} 44 assertThat( 45 new EnumUnion(), is(EnumUnion.intEnum(IntEnum.FOO))); // IntEnum intEnum = IntEnum.FOO 46 } 47 48 @Test updatesUnionWithSetter()49 public void updatesUnionWithSetter() { 50 Union u = new Union(); 51 u.setNs(new int[] {1, 2, 3}); 52 assertThat(u.getTag(), is(Union.ns)); 53 assertThat(u.getNs(), is(new int[] {1, 2, 3})); 54 } 55 56 @Test(expected = IllegalStateException.class) gettingWrongFieldThrowsException()57 public void gettingWrongFieldThrowsException() { 58 Union u = new Union(); 59 u.getSs(); 60 } 61 62 @Test readWriteViaParcel()63 public void readWriteViaParcel() { 64 List<String> ss = Arrays.asList("hello", "world"); 65 66 Union u = Union.ss(ss); 67 Parcel parcel = Parcel.obtain(); 68 u.writeToParcel(parcel, 0); 69 parcel.setDataPosition(0); 70 71 Union v = Union.CREATOR.createFromParcel(parcel); 72 73 assertThat(v.getTag(), is(Union.ss)); 74 assertThat(v.getSs(), is(ss)); 75 76 parcel.recycle(); 77 } 78 79 @Test unionDescribeContents()80 public void unionDescribeContents() { 81 UnionWithFd u = UnionWithFd.num(0); 82 assertTrue((u.describeContents() & Parcelable.CONTENTS_FILE_DESCRIPTOR) == 0); 83 84 final Parcel parcel = Parcel.obtain(); 85 try { 86 u.setPfd(ParcelFileDescriptor.open(new File("/system"), ParcelFileDescriptor.MODE_READ_ONLY)); 87 } catch (FileNotFoundException e) { 88 throw new RuntimeException("can't open /system", e); 89 } 90 assertTrue((u.describeContents() & Parcelable.CONTENTS_FILE_DESCRIPTOR) != 0); 91 92 u.writeToParcel(parcel, 0); 93 94 UnionWithFd v = UnionWithFd.num(0); 95 parcel.setDataPosition(0); 96 v.readFromParcel(parcel); 97 assertTrue((v.describeContents() & Parcelable.CONTENTS_FILE_DESCRIPTOR) != 0); 98 99 parcel.recycle(); 100 } 101 shouldBeTheSame(Union a, Union b)102 private void shouldBeTheSame(Union a, Union b) { 103 assertTrue(a.equals(b)); 104 assertTrue(b.equals(a)); 105 assertTrue(a.equals(a)); 106 assertTrue(b.equals(b)); 107 assertTrue(a.hashCode() == b.hashCode()); 108 } 109 shouldBeDifferent(Union a, Union b)110 private void shouldBeDifferent(Union a, Union b) { 111 assertFalse(a.equals(b)); 112 assertFalse(b.equals(a)); 113 assertFalse(a.hashCode() == b.hashCode()); 114 } 115 116 @Test equalsAndHashCode()117 public void equalsAndHashCode() { 118 // same tag, same value 119 shouldBeTheSame(Union.s("hello"), Union.s("hello")); 120 121 // different tag, same value 122 shouldBeDifferent(Union.m(10), Union.n(10)); 123 124 // same tag, different value 125 shouldBeDifferent(Union.s("hello"), Union.s("world")); 126 127 // with array 128 shouldBeTheSame(Union.ns(new int[]{1, 2, 3}),Union.ns(new int[]{1, 2, 3})); 129 shouldBeDifferent(Union.ns(new int[]{1, 2, 3}), Union.ns(new int[]{1, 2, 4})); 130 } 131 } 132