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Compose
UI Unit test
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Android Test Night #
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mkeeda
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About me
• mkeeda (Ҫా Ұฏ)
• Twitter: @mr_mkeeda
• Github: @mkeeda
• Android Engineer at Cybozu, Inc
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Android UI
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Domain Layer
UI Layer
Data Layer
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UI elements
State holders
UseCases
Repositories
DataSources
ViewModelTest
UseCaseTest
RepositoryTest
DatabaseTest, NetworkTest
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End-to-end test
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Domain Layer
UI Layer
Data Layer
UI elements
State holders
UseCases
Repositories
DataSources
Espresso
performAction()
&
assert()
😍
🤮
🤮
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Domain Layer
UI Layer
Data Layer
UI elements
State holders
UseCases
Repositories
DataSources
Unit test
: UI ViewModel
or Fake
🤮
😍
😍
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UI Unit test
UI
disable
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Domain Layer
UI Layer
Data Layer
UI elements
State holders
UseCases
Repositories
DataSources
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Jetpack Compose
UI
f(UI state) = UI
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@Preview
@Composable
fun IntTextFieldPreview() {
Surface {
IntTextField(
value = 0,
onValueChange = {}
)
}
}
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Compose UI
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@Test
fun `Ҏ֎ೖྗͰ͖ͳ͍`() = runComposeUiTest {
var userInputText: Int? by mutableStateOf(0)
setContent {
IntTextField(
value = userInputText,
onValueChange = { userInputText = it }
)
}
val notInt = "sample"
onNode(hasSetTextAction()).performTextInput(notInt)
onNodeWithText(notInt).assertDoesNotExist()
assertThat(userInputText).isEqualTo(0)
}
ComposeTestRule
UI
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https://www.youtube.com/watch?v=JyUJZvJ-OV
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UI Unit test
UI
UI
Screenshot test
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https://www.droidcon.com/
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01
/modern-testing-on-android/
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Unit test
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Instrumented test
Android
CI Android
Robolectric
Instrumented test Local test
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My app
Android framework
Instrumented test (AndroidView)
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android.view.View
MyView
Android Runtime
Espresso
performAction()
&
assert()
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Android class ⾒
Local test with Robolectric (AndroidView)
My app
Robolectric
ShadowView
MyView
Local JVM
Espresso
performAction()
&
assert()
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Instrumented test (Compose)
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Compose test library
performAction()
&
assert()
My app
Android framework
android.graphic.Canvas
MyComposable
Android Runtime
Compose Runtime
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Semantic assert Shadow
Local test with Robolectric (Compose)
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Compose test library
performAction()
&
assert()
My app
Robolectric
ShadowCanvas
MyComposable
Local JVM
Compose Runtime
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UI UI
Compose UI
Compose Robolectric
Compose UI
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