1 /*
<lambda>null2 * Copyright (C) 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 com.android.testutils
18
19 import android.os.Parcel
20 import android.os.Parcelable
21 import kotlin.test.assertTrue
22 import kotlin.test.fail
23
24 /**
25 * Return a new instance of `T` after being parceled then unparceled.
26 */
27 fun <T : Parcelable> parcelingRoundTrip(source: T): T {
28 val creator: Parcelable.Creator<T>
29 try {
30 creator = source.javaClass.getField("CREATOR").get(null) as Parcelable.Creator<T>
31 } catch (e: IllegalAccessException) {
32 fail("Missing CREATOR field: " + e.message)
33 } catch (e: NoSuchFieldException) {
34 fail("Missing CREATOR field: " + e.message)
35 }
36
37 var p = Parcel.obtain()
38 source.writeToParcel(p, /* flags */ 0)
39 p.setDataPosition(0)
40 val marshalled = p.marshall()
41 p = Parcel.obtain()
42 p.unmarshall(marshalled, 0, marshalled.size)
43 p.setDataPosition(0)
44 return creator.createFromParcel(p)
45 }
46
47 /**
48 * Assert that after being parceled then unparceled, `source` is equal to the original
49 * object. If a customized equals function is provided, uses the provided one.
50 */
51 @JvmOverloads
assertParcelingIsLosslessnull52 fun <T : Parcelable> assertParcelingIsLossless(
53 source: T,
54 equals: (T, T) -> Boolean = { a, b -> a == b }
55 ) {
56 val actual = parcelingRoundTrip(source)
57 assertTrue(equals(source, actual), "Expected $source, but was $actual")
58 }
59
60 @JvmOverloads
assertParcelSanenull61 fun <T : Parcelable> assertParcelSane(
62 obj: T,
63 fieldCount: Int,
64 equals: (T, T) -> Boolean = { a, b -> a == b }
65 ) {
66 assertFieldCountEquals(fieldCount, obj::class.java)
67 assertParcelingIsLossless(obj, equals)
68 }
69