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/*
* Copyright (C) 2021 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.
*/
package com.android.testutils
import android.net.NetworkCapabilities
import android.net.NetworkProvider
import android.net.NetworkRequest
import android.util.Log
import com.android.net.module.util.ArrayTrackRecord
import kotlin.test.fail
class TestableNetworkOfferCallback(val timeoutMs: Long, private val noCallbackTimeoutMs: Long)
: NetworkProvider.NetworkOfferCallback {
private val TAG = this::class.simpleName
val history = ArrayTrackRecord<CallbackEntry>().newReadHead()
sealed class CallbackEntry {
data class OnNetworkNeeded(val request: NetworkRequest) : CallbackEntry()
data class OnNetworkUnneeded(val request: NetworkRequest) : CallbackEntry()
}
/**
* Called by the system when a network for this offer is needed to satisfy some
* networking request.
*/
override fun onNetworkNeeded(request: NetworkRequest) {
Log.d(TAG, "onNetworkNeeded $request")
history.add(CallbackEntry.OnNetworkNeeded(request))
}
/**
* Called by the system when this offer is no longer valuable for this request.
*/
override fun onNetworkUnneeded(request: NetworkRequest) {
Log.d(TAG, "onNetworkUnneeded $request")
history.add(CallbackEntry.OnNetworkUnneeded(request))
}
inline fun <reified T : CallbackEntry> expectCallbackThat(
crossinline predicate: (T) -> Boolean
) {
val event = history.poll(timeoutMs)
?: fail("Did not receive callback after ${timeoutMs}ms")
if (event !is T || !predicate(event)) fail("Received unexpected callback $event")
}
fun expectOnNetworkNeeded(capabilities: NetworkCapabilities) =
expectCallbackThat<CallbackEntry.OnNetworkNeeded> {
it.request.canBeSatisfiedBy(capabilities)
}
fun expectOnNetworkUnneeded(capabilities: NetworkCapabilities) =
expectCallbackThat<CallbackEntry.OnNetworkUnneeded> {
it.request.canBeSatisfiedBy(capabilities)
}
fun assertNoCallback() {
val cb = history.poll(noCallbackTimeoutMs)
if (null != cb) fail("Expected no callback but got $cb")
}
}
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