blob: 0073d86873dae3b895eeec60d511bec1a49d33fa [file] [log] [blame]
Neil Fuller2c6d5102019-11-29 09:02:39 +00001/*
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
17package android.app.timezonedetector;
18
19import static org.junit.Assert.assertEquals;
20
21import android.os.Parcel;
22import android.os.Parcelable;
23
24import java.lang.reflect.Field;
25
26/** Utility methods related to {@link Parcelable} objects used in several tests. */
27public final class ParcelableTestSupport {
28
29 private ParcelableTestSupport() {}
30
31 /** Returns the result of parceling and unparceling the argument. */
32 @SuppressWarnings("unchecked")
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
50 public static <T extends Parcelable> void assertRoundTripParcelable(T instance) {
51 assertEquals(instance, roundTripParcelable(instance));
52 }
53}