MainTestClockImpl.android.kt
/*
* Copyright 2020 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 androidx.compose.ui.test.junit4
import androidx.compose.ui.test.ComposeTimeoutException
import androidx.compose.ui.test.MainTestClock
import androidx.compose.ui.test.TestMonotonicFrameClock
import androidx.compose.ui.test.frameDelayMillis
import kotlinx.coroutines.ExperimentalCoroutinesApi
import kotlinx.coroutines.test.TestCoroutineDispatcher
import kotlin.math.ceil
@OptIn(ExperimentalCoroutinesApi::class)
internal class MainTestClockImpl(
private val testDispatcher: TestCoroutineDispatcher,
private val frameClock: TestMonotonicFrameClock
) : MainTestClock {
override val currentTime: Long
get() = testDispatcher.currentTime
override var autoAdvance: Boolean = true
internal val hasAwaiters = frameClock.hasAwaiters
override fun advanceTimeByFrame() {
advanceDispatcher(frameClock.frameDelayMillis)
}
override fun advanceTimeBy(milliseconds: Long, ignoreFrameDuration: Boolean) {
val actualDelay = if (ignoreFrameDuration) {
milliseconds
} else {
ceil(
milliseconds.toDouble() / frameClock.frameDelayMillis
).toLong() * frameClock.frameDelayMillis
}
advanceDispatcher(actualDelay)
}
override fun advanceTimeUntil(timeoutMillis: Long, condition: () -> Boolean) {
val startTime = currentTime
runOnUiThread {
while (!condition()) {
advanceDispatcher(frameClock.frameDelayMillis)
if (currentTime - startTime > timeoutMillis) {
throw ComposeTimeoutException(
"Condition still not satisfied after $timeoutMillis ms"
)
}
}
}
}
internal fun advanceDispatcher(millis: Long) {
runOnUiThread {
testDispatcher.advanceTimeBy(millis)
}
}
}