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Add MainDispatcherRule to swap Dispatchers.Main with a TestDispatcher

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Wolf-Martell Montwé 2023-05-16 17:20:09 +02:00
parent 8376909043
commit 5f0a6437cf
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1 changed files with 23 additions and 0 deletions
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core/ui/compose/testing/src/main/kotlin/app/k9mail/core/ui/compose/testing/MainDispatcherRule.kt Normal file
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package app.k9mail.core.ui.compose.testing
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.test.TestDispatcher
import kotlinx.coroutines.test.UnconfinedTestDispatcher
import kotlinx.coroutines.test.resetMain
import kotlinx.coroutines.test.setMain
import org.junit.rules.TestWatcher
/**
* A JUnit rule that swaps the [Dispatchers.Main] dispatcher with a [TestDispatcher] for the duration of the test.
*/
class MainDispatcherRule(
val testDispatcher: TestDispatcher = UnconfinedTestDispatcher(),
) : TestWatcher() {
override fun starting(description: org.junit.runner.Description?) {
Dispatchers.setMain(testDispatcher)
}
override fun finished(description: org.junit.runner.Description?) {
Dispatchers.resetMain()
}
}