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EventListenerTest.kt
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EventListenerTest.kt
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package coil
import android.content.ContentResolver.SCHEME_ANDROID_RESOURCE
import android.content.Context
import android.graphics.Bitmap
import androidx.lifecycle.Lifecycle
import androidx.test.core.app.ApplicationProvider
import androidx.test.ext.junit.rules.activityScenarioRule
import coil.base.test.R
import coil.decode.DecodeResult
import coil.decode.Decoder
import coil.fetch.FetchResult
import coil.fetch.Fetcher
import coil.request.ErrorResult
import coil.request.ImageRequest
import coil.request.Options
import coil.request.SuccessResult
import coil.size.Size
import coil.transform.Transformation
import coil.transition.Transition
import coil.util.ViewTestActivity
import coil.util.activity
import kotlinx.coroutines.CancellationException
import kotlinx.coroutines.ExperimentalCoroutinesApi
import kotlinx.coroutines.suspendCancellableCoroutine
import kotlinx.coroutines.test.runTest
import org.junit.Before
import org.junit.Rule
import org.junit.Test
import java.util.concurrent.atomic.AtomicInteger
import kotlin.coroutines.resume
import kotlin.coroutines.resumeWithException
import kotlin.test.assertTrue
@OptIn(ExperimentalCoroutinesApi::class)
class EventListenerTest {
private lateinit var context: Context
@get:Rule
val activityRule = activityScenarioRule<ViewTestActivity>()
@Before
fun before() {
context = ApplicationProvider.getApplicationContext()
activityRule.scenario.moveToState(Lifecycle.State.RESUMED)
}
@Test
fun basic() = runTest {
val eventListener = TestEventListener(
transformStart = MethodChecker(false),
transformEnd = MethodChecker(false),
transitionStart = MethodChecker(false),
transitionEnd = MethodChecker(false),
onCancel = MethodChecker(false),
onError = MethodChecker(false)
)
val imageLoader = ImageLoader.Builder(context)
.eventListener(eventListener)
.build()
imageLoader.testEnqueue {
data("$SCHEME_ANDROID_RESOURCE://${context.packageName}/${R.drawable.normal}")
}
eventListener.complete()
}
@Test
fun transformations() = runTest {
val eventListener = TestEventListener(
transitionStart = MethodChecker(false),
transitionEnd = MethodChecker(false),
onCancel = MethodChecker(false),
onError = MethodChecker(false)
)
val imageLoader = ImageLoader.Builder(context)
.eventListener(eventListener)
.build()
var transformationIsCalled = false
imageLoader.testEnqueue {
data("$SCHEME_ANDROID_RESOURCE://${context.packageName}/${R.drawable.normal}")
transformations(object : Transformation {
override val cacheKey = "test_transformation"
override suspend fun transform(input: Bitmap, size: Size): Bitmap {
transformationIsCalled = true
return input
}
})
}
assertTrue(transformationIsCalled)
eventListener.complete()
}
@Test
fun transitions() = runTest {
val eventListener = TestEventListener(
transformStart = MethodChecker(false),
transformEnd = MethodChecker(false),
onCancel = MethodChecker(false),
onError = MethodChecker(false)
)
val imageLoader = ImageLoader.Builder(context)
.eventListener(eventListener)
.build()
var transitionIsCalled = false
imageLoader.testEnqueue {
data("$SCHEME_ANDROID_RESOURCE://${context.packageName}/${R.drawable.normal}")
transitionFactory { target, result ->
Transition {
transitionIsCalled = true
when (result) {
is SuccessResult -> target.onSuccess(result.drawable)
is ErrorResult -> target.onError(result.drawable)
}
}
}
}
assertTrue(transitionIsCalled)
eventListener.complete()
}
@Test
fun error() = runTest {
val eventListener = TestEventListener(
fetchStart = MethodChecker(false),
fetchEnd = MethodChecker(false),
decodeStart = MethodChecker(false),
decodeEnd = MethodChecker(false),
transformStart = MethodChecker(false),
transformEnd = MethodChecker(false),
transitionStart = MethodChecker(false),
transitionEnd = MethodChecker(false),
onSuccess = MethodChecker(false),
onCancel = MethodChecker(false)
)
val imageLoader = ImageLoader.Builder(context)
.eventListener(eventListener)
.build()
try {
imageLoader.testEnqueue {
data("fake_data")
}
} catch (_: Exception) {}
eventListener.complete()
}
@Test
fun nullData() = runTest {
val eventListener = TestEventListener(
onStart = MethodChecker(false),
resolveSizeStart = MethodChecker(false),
resolveSizeEnd = MethodChecker(false),
mapStart = MethodChecker(false),
mapEnd = MethodChecker(false),
keyStart = MethodChecker(false),
keyEnd = MethodChecker(false),
fetchStart = MethodChecker(false),
fetchEnd = MethodChecker(false),
decodeStart = MethodChecker(false),
decodeEnd = MethodChecker(false),
transformStart = MethodChecker(false),
transformEnd = MethodChecker(false),
transitionStart = MethodChecker(false),
transitionEnd = MethodChecker(false),
onSuccess = MethodChecker(false),
onCancel = MethodChecker(false)
)
val imageLoader = ImageLoader.Builder(context)
.eventListener(eventListener)
.build()
try {
imageLoader.testEnqueue {
data(null)
}
} catch (_: Exception) {}
eventListener.complete()
}
private suspend fun ImageLoader.testEnqueue(
builder: ImageRequest.Builder.() -> Unit
) = suspendCancellableCoroutine { continuation ->
val request = ImageRequest.Builder(context)
.size(100, 100)
.target(activityRule.scenario.activity.imageView)
.listener(
onSuccess = { _, _ -> continuation.resume(Unit) },
onError = { _, result -> continuation.resumeWithException(result.throwable) },
onCancel = { continuation.resumeWithException(CancellationException()) }
)
.apply(builder)
.build()
enqueue(request)
}
private class MethodChecker(private val callExpected: Boolean) {
private val callCount = AtomicInteger(0)
fun call() {
callCount.getAndIncrement()
}
fun complete(eventName: String) {
val count = callCount.get()
require(count in 0..1) { "$eventName was called $count times." }
if (callExpected) {
require(count == 1) { "$eventName WAS NOT called." }
} else {
require(count == 0) { "$eventName WAS called." }
}
}
}
private class TestEventListener(
val onStart: MethodChecker = MethodChecker(true),
val resolveSizeStart: MethodChecker = MethodChecker(true),
val resolveSizeEnd: MethodChecker = MethodChecker(true),
val mapStart: MethodChecker = MethodChecker(true),
val mapEnd: MethodChecker = MethodChecker(true),
val keyStart: MethodChecker = MethodChecker(true),
val keyEnd: MethodChecker = MethodChecker(true),
val fetchStart: MethodChecker = MethodChecker(true),
val fetchEnd: MethodChecker = MethodChecker(true),
val decodeStart: MethodChecker = MethodChecker(true),
val decodeEnd: MethodChecker = MethodChecker(true),
val transformStart: MethodChecker = MethodChecker(true),
val transformEnd: MethodChecker = MethodChecker(true),
val transitionStart: MethodChecker = MethodChecker(true),
val transitionEnd: MethodChecker = MethodChecker(true),
val onSuccess: MethodChecker = MethodChecker(true),
val onCancel: MethodChecker = MethodChecker(true),
val onError: MethodChecker = MethodChecker(true)
) : EventListener {
override fun onStart(request: ImageRequest) = onStart.call()
override fun resolveSizeStart(request: ImageRequest) = resolveSizeStart.call()
override fun resolveSizeEnd(request: ImageRequest, size: Size) = resolveSizeEnd.call()
override fun mapStart(request: ImageRequest, input: Any) = mapStart.call()
override fun mapEnd(request: ImageRequest, output: Any) = mapEnd.call()
override fun keyStart(request: ImageRequest, input: Any) = keyStart.call()
override fun keyEnd(request: ImageRequest, output: String?) = keyEnd.call()
override fun fetchStart(request: ImageRequest, fetcher: Fetcher, options: Options) = fetchStart.call()
override fun fetchEnd(request: ImageRequest, fetcher: Fetcher, options: Options, result: FetchResult?) = fetchEnd.call()
override fun decodeStart(request: ImageRequest, decoder: Decoder, options: Options) = decodeStart.call()
override fun decodeEnd(request: ImageRequest, decoder: Decoder, options: Options, result: DecodeResult?) = decodeEnd.call()
override fun transformStart(request: ImageRequest, input: Bitmap) = transformStart.call()
override fun transformEnd(request: ImageRequest, output: Bitmap) = transformEnd.call()
override fun transitionStart(request: ImageRequest, transition: Transition) = transitionStart.call()
override fun transitionEnd(request: ImageRequest, transition: Transition) = transitionEnd.call()
override fun onCancel(request: ImageRequest) = onCancel.call()
override fun onError(request: ImageRequest, result: ErrorResult) = onError.call()
override fun onSuccess(request: ImageRequest, result: SuccessResult) = onSuccess.call()
fun complete() {
onStart.complete("onStart")
resolveSizeStart.complete("resolveSizeStart")
resolveSizeEnd.complete("resolveSizeEnd")
mapStart.complete("mapStart")
mapEnd.complete("mapEnd")
keyStart.complete("keyStart")
keyEnd.complete("keyEnd")
fetchStart.complete("fetchStart")
fetchEnd.complete("fetchEnd")
decodeStart.complete("decodeStart")
decodeEnd.complete("decodeEnd")
transformStart.complete("transformStart")
transformEnd.complete("transformEnd")
transitionStart.complete("transitionStart")
transitionEnd.complete("transitionEnd")
onCancel.complete("onCancel")
onError.complete("onError")
onSuccess.complete("onSuccess")
}
}
}