1 /* 2 * Copyright (C) 2016 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 com.android.documentsui.testing; 18 19 import static junit.framework.Assert.assertEquals; 20 import static junit.framework.Assert.assertTrue; 21 22 import android.os.Parcel; 23 import android.os.Parcelable; 24 25 import java.util.function.BiPredicate; 26 27 public class Parcelables { 28 29 private Parcelables() {} 30 31 public static <T extends Parcelable> void assertParcelable(T p, int flags) { 32 final T restored = parcel(p, flags); 33 34 assertEquals(p, restored); 35 } 36 37 public static <T extends Parcelable> void assertParcelable( 38 T p, int flags, BiPredicate<T, T> pred) { 39 T restored = parcel(p, flags); 40 41 assertTrue(pred.test(p, restored)); 42 } 43 44 private static <T extends Parcelable> T parcel(T p, int flags) { 45 Parcel write = Parcel.obtain(); 46 Parcel read = Parcel.obtain(); 47 final T restored; 48 try { 49 write.writeParcelable(p, flags); 50 final byte[] data = write.marshall(); 51 52 read.unmarshall(data, 0, data.length); 53 read.setDataPosition(0); 54 restored = read.readParcelable(p.getClass().getClassLoader()); 55 } finally { 56 write.recycle(); 57 read.recycle(); 58 } 59 60 return restored; 61 } 62 } 63
