1 /* 2 * Copyright 2019 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.app.time.cts; 18 19 import static org.junit.Assert.assertEquals; 20 21 import android.os.Parcel; 22 import android.os.Parcelable; 23 24 import java.lang.reflect.Field; 25 26 /** Utility methods related to {@link Parcelable} objects used in several tests. */ 27 public final class ParcelableTestSupport { 28 ParcelableTestSupport()29 private ParcelableTestSupport() {} 30 31 /** Returns the result of parceling and unparceling the argument. */ 32 @SuppressWarnings("unchecked") roundTripParcelable(T parcelable)33 public static <T extends Parcelable> T roundTripParcelable(T parcelable) { 34 Parcel parcel = Parcel.obtain(); 35 parcel.writeTypedObject(parcelable, 0); 36 parcel.setDataPosition(0); 37 38 Parcelable.Creator<T> creator; 39 try { 40 Field creatorField = parcelable.getClass().getField("CREATOR"); 41 creator = (Parcelable.Creator<T>) creatorField.get(null); 42 } catch (NoSuchFieldException | IllegalAccessException e) { 43 throw new AssertionError(e); 44 } 45 T toReturn = parcel.readTypedObject(creator); 46 parcel.recycle(); 47 return toReturn; 48 } 49 assertRoundTripParcelable(T instance)50 public static <T extends Parcelable> void assertRoundTripParcelable(T instance) { 51 assertEquals(instance, roundTripParcelable(instance)); 52 } 53 } 54