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/*
* Copyright (C) 2019 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
@file:JvmName("ParcelUtils")
package com.android.testutils
import android.os.Parcel
import android.os.Parcelable
import kotlin.test.assertTrue
import kotlin.test.fail
/**
* Return a new instance of `T` after being parceled then unparceled.
*/
fun <T : Parcelable> parcelingRoundTrip(source: T): T {
val creator: Parcelable.Creator<T>
try {
creator = source.javaClass.getField("CREATOR").get(null) as Parcelable.Creator<T>
} catch (e: IllegalAccessException) {
fail("Missing CREATOR field: " + e.message)
} catch (e: NoSuchFieldException) {
fail("Missing CREATOR field: " + e.message)
}
var p = Parcel.obtain()
source.writeToParcel(p, /* flags */ 0)
p.setDataPosition(0)
val marshalled = p.marshall()
p = Parcel.obtain()
p.unmarshall(marshalled, 0, marshalled.size)
p.setDataPosition(0)
return creator.createFromParcel(p)
}
/**
* Assert that after being parceled then unparceled, `source` is equal to the original
* object. If a customized equals function is provided, uses the provided one.
*/
@JvmOverloads
fun <T : Parcelable> assertParcelingIsLossless(
source: T,
equals: (T, T) -> Boolean = { a, b -> a == b }
) {
val actual = parcelingRoundTrip(source)
assertTrue(equals(source, actual), "Expected $source, but was $actual")
}
@JvmOverloads
fun <T : Parcelable> assertParcelSane(
obj: T,
fieldCount: Int,
equals: (T, T) -> Boolean = { a, b -> a == b }
) {
assertFieldCountEquals(fieldCount, obj::class.java)
assertParcelingIsLossless(obj, equals)
}
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