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Code Issues Releases Wiki Activity

[fenix] For https://github.com/mozilla-mobile/fenix/issues/26723 - Ensure wallpapers are set on the main thread

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Using Dispatchers.IO allowed the observer to react faster to wallpaper state
updates but caused issues with updating the wallpaper in fragment layout.

Using Dispatchers.Main.immediate gives us a bit slower reaction time but still
faster than Dispatchers.Main and allows us to still execute before the fragment
is visible.
This commit is contained in:
Mugurell 2022-08-31 17:44:27 +03:00 committed by mergify[bot]
parent aa0ed7ad4a
commit 4662dbd8ab
2 changed files with 49 additions and 40 deletions
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11
app/src/main/java/org/mozilla/fenix/home/WallpapersObserver.kt
View File

@ -39,7 +39,7 @@ class WallpapersObserver(
@VisibleForTesting
internal var observeWallpapersStoreSubscription: Store.Subscription<AppState, AppAction>? = null
@VisibleForTesting
internal var wallpapersScope = CoroutineScope(Dispatchers.IO)
internal var wallpapersScope = CoroutineScope(Dispatchers.Main.immediate)
init {
observeWallpaperUpdates()
@ -49,7 +49,7 @@ class WallpapersObserver(
* Immediately apply the current wallpaper automatically adjusted to support
* the current configuration - portrait or landscape.
*/
suspend fun applyCurrentWallpaper() {
fun applyCurrentWallpaper() {
showWallpaper()
}
@ -69,7 +69,7 @@ class WallpapersObserver(
if (currentValue.name != lastObservedValue?.name) {
lastObservedValue = currentValue
wallpapersScope.launch { showWallpaper(currentValue) }
showWallpaper(currentValue)
}
}.also {
it.resume()
@ -77,7 +77,8 @@ class WallpapersObserver(
}
@VisibleForTesting
internal suspend fun showWallpaper(wallpaper: Wallpaper = appStore.state.wallpaperState.currentWallpaper) {
internal fun showWallpaper(wallpaper: Wallpaper = appStore.state.wallpaperState.currentWallpaper) {
wallpapersScope.launch {
when (wallpaper) {
// We only want to update the wallpaper when it's different from the default one
// as the default is applied already on xml by default.
@ -86,6 +87,7 @@ class WallpapersObserver(
}
else -> {
val bitmap = wallpapersUseCases.loadBitmap(wallpaper)
bitmap?.let {
it.scaleToBottomOfView(wallpaperImageView)
wallpaperImageView.isVisible = true
@ -94,3 +96,4 @@ class WallpapersObserver(
}
}
}
}

56
app/src/test/java/org/mozilla/fenix/home/WallpapersObserverTest.kt
View File

@ -10,7 +10,6 @@ import androidx.core.view.isVisible
import io.mockk.Called
import io.mockk.Runs
import io.mockk.coEvery
import io.mockk.coVerify
import io.mockk.every
import io.mockk.just
import io.mockk.mockk
@ -18,10 +17,8 @@ import io.mockk.spyk
import io.mockk.verify
import kotlinx.coroutines.cancel
import mozilla.components.support.test.libstate.ext.waitUntilIdle
import mozilla.components.support.test.rule.MainCoroutineRule
import mozilla.components.support.test.rule.runTestOnMain
import org.junit.Assert.assertNotNull
import org.junit.Rule
import org.junit.Assert.assertTrue
import org.junit.Test
import org.junit.runner.RunWith
import org.mozilla.fenix.components.AppStore
@ -32,9 +29,6 @@ import org.mozilla.fenix.wallpapers.WallpapersUseCases
@RunWith(FenixRobolectricTestRunner::class)
class WallpapersObserverTest {
@get:Rule
val coroutinesTestRule = MainCoroutineRule()
@Test
fun `WHEN the observer is created THEN start observing the store`() {
val appStore: AppStore = mockk(relaxed = true) {
@ -47,15 +41,15 @@ class WallpapersObserverTest {
}
@Test
fun `WHEN asked to apply the wallpaper THEN show it`() = runTestOnMain {
fun `WHEN asked to apply the wallpaper THEN show it`() {
val appStore = AppStore()
val observer = spyk(WallpapersObserver(appStore, mockk(), mockk())) {
coEvery { showWallpaper(any()) } just Runs
every { showWallpaper(any()) } just Runs
}
observer.applyCurrentWallpaper()
coVerify { observer.showWallpaper(any()) }
verify { observer.showWallpaper(any()) }
}
@Test
@ -73,10 +67,10 @@ class WallpapersObserverTest {
}
@Test
fun `WHEN the wallpaper is updated THEN show the wallpaper`() = runTestOnMain {
fun `WHEN the wallpaper is updated THEN show the wallpaper`() {
val appStore = AppStore()
val observer = spyk(WallpapersObserver(appStore, mockk(relaxed = true), mockk(relaxed = true))) {
coEvery { showWallpaper(any()) } just Runs
every { showWallpaper(any()) } just Runs
}
// Ignore the call on the real instance and call again "observeWallpaperUpdates"
@ -86,38 +80,38 @@ class WallpapersObserverTest {
val newWallpaper: Wallpaper = mockk(relaxed = true)
appStore.dispatch(UpdateCurrentWallpaper(newWallpaper))
appStore.waitUntilIdle()
coVerify { observer.showWallpaper(newWallpaper) }
verify { observer.showWallpaper(newWallpaper) }
}
@Test
fun `WHEN the wallpaper is updated to a new one THEN show the wallpaper`() = runTestOnMain {
fun `WHEN the wallpaper is updated to a new one THEN show the wallpaper`() {
val appStore = AppStore()
val wallpapersUseCases: WallpapersUseCases = mockk {
coEvery { loadBitmap(any()) } returns null
}
val observer = spyk(WallpapersObserver(appStore, wallpapersUseCases, mockk(relaxed = true))) {
coEvery { showWallpaper(any()) } just Runs
every { showWallpaper(any()) } just Runs
}
// Ignore the call on the real instance and call again "observeWallpaperUpdates"
// on the spy to be able to verify the "showWallpaper" call in the spy.
observer.observeWallpaperUpdates()
coVerify { observer.showWallpaper(Wallpaper.Default) }
verify { observer.showWallpaper(Wallpaper.Default) }
val wallpaper: Wallpaper = mockk(relaxed = true)
appStore.dispatch(UpdateCurrentWallpaper(wallpaper))
appStore.waitUntilIdle()
coVerify { observer.showWallpaper(wallpaper) }
verify { observer.showWallpaper(wallpaper) }
}
@Test
fun `WHEN the wallpaper is updated to the current one THEN don't try showing the same wallpaper again`() = runTestOnMain {
fun `WHEN the wallpaper is updated to the current one THEN don't try showing the same wallpaper again`() {
val appStore = AppStore()
val wallpapersUseCases: WallpapersUseCases = mockk {
coEvery { loadBitmap(any()) } returns null
}
val observer = spyk(WallpapersObserver(appStore, wallpapersUseCases, mockk(relaxed = true))) {
coEvery { showWallpaper(any()) } just Runs
every { showWallpaper(any()) } just Runs
}
// Ignore the call on the real instance and call again "observeWallpaperUpdates"
// on the spy to be able to verify the "showWallpaper" call in the spy.
@ -126,15 +120,15 @@ class WallpapersObserverTest {
val wallpaper: Wallpaper = mockk(relaxed = true)
appStore.dispatch(UpdateCurrentWallpaper(wallpaper))
appStore.waitUntilIdle()
coVerify { observer.showWallpaper(wallpaper) }
verify { observer.showWallpaper(wallpaper) }
appStore.dispatch(UpdateCurrentWallpaper(wallpaper))
appStore.waitUntilIdle()
coVerify(exactly = 1) { observer.showWallpaper(wallpaper) }
verify(exactly = 1) { observer.showWallpaper(wallpaper) }
}
@Test
fun `GIVEN no wallpaper is provided WHEN asked to show the wallpaper THEN show the current one`() = runTestOnMain {
fun `GIVEN no wallpaper is provided WHEN asked to show the wallpaper THEN show the current one`() {
val wallpaper: Wallpaper = mockk()
val appStore: AppStore = mockk(relaxed = true) {
every { state.wallpaperState.currentWallpaper } returns wallpaper
@ -143,10 +137,10 @@ class WallpapersObserverTest {
observer.showWallpaper()
coVerify { observer.showWallpaper(wallpaper) }
verify { observer.showWallpaper(wallpaper) }
}
fun `GiVEN the current wallpaper is the default one WHEN showing it THEN hide the wallpaper view`() = runTestOnMain {
fun `GiVEN the current wallpaper is the default one WHEN showing it THEN hide the wallpaper view`() {
val wallpapersUseCases: WallpapersUseCases = mockk()
val wallpaperView: ImageView = mockk(relaxed = true)
val observer = WallpapersObserver(mockk(relaxed = true), wallpapersUseCases, wallpaperView)
@ -158,7 +152,7 @@ class WallpapersObserverTest {
}
@Test
fun `GiVEN the current wallpaper is different than the default one WHEN showing it THEN load it's bitmap in the visible wallpaper view`() = runTestOnMain {
fun `GiVEN the current wallpaper is different than the default one WHEN showing it THEN load it's bitmap in the visible wallpaper view`() {
val wallpaper: Wallpaper = mockk()
val bitmap: Bitmap = mockk()
val wallpapersUseCases: WallpapersUseCases = mockk {
@ -172,4 +166,16 @@ class WallpapersObserverTest {
verify { wallpaperView.isVisible = true }
verify { wallpaperView.setImageBitmap(bitmap) }
}
@Test
fun `GIVEN the observer THEN use the main thread for showing the wallpaper`() {
val wallpapersUseCases: WallpapersUseCases = mockk()
val wallpaperView: ImageView = mockk(relaxed = true)
val observer = WallpapersObserver(mockk(relaxed = true), wallpapersUseCases, wallpaperView)
// Check that the context that would be used is Dispatchers.Main.immediate
// Unfortunately I could not also test that this is actually used when "showWallpaper" is called.
assertTrue(observer.wallpapersScope.toString().contains("Dispatchers.Main.immediate"))
}
}