Is there an API to wait for a composable to be dis...
# composez
zsperske
09/26/2023, 8:47 PMIs there an API to wait for a composable to be displayed before taking action on it in an Espresso test? I run into flaky tests where a composable will exist, but when I do something like
performClickSemanticsMatcherisDisplayedz
Zach Klippenstein (he/him) [MOD]
09/26/2023, 9:00 PMassertIsDisplayedz
zsperske
09/26/2023, 9:01 PMI’m aware of that one, but that will throw an exception if the node isn’t visible yet. I’m running into cases where I need manually wait before I can make that assertion, or perform an action like click
z
Zach Klippenstein (he/him) [MOD]
09/26/2023, 9:13 PMoh so you want something like
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rule.waitUntil { isDisplayed() }z
zsperske
09/26/2023, 9:13 PMyup!
zsperske
09/26/2023, 9:15 PMSomething like this works, I was just surprised that it doesn’t exist which made me wonder if we’re doing something wrong.
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fun ComposeTestRule.waitUntilDisplayed(
matcher: SemanticsMatcher,
timeoutMillis: Long = DEFAULT_WAIT_TIMEOUT
): SemanticsNodeInteraction {
val deadline = System.currentTimeMillis() + timeoutMillis
while (true) {
try {
return waitUntilExists(matcher).assertIsDisplayed()
} catch (error: AssertionError) {
if (System.currentTimeMillis() < deadline) {
android.os.SystemClock.sleep(50)
} else {
throw error
}
}
}
}z
Zach Klippenstein (he/him) [MOD]
09/26/2023, 9:21 PMcan you file a feature request for this?
Zach Klippenstein (he/him) [MOD]
09/26/2023, 9:21 PMi’ll propose exposing our internal
checkIsDisplayedz
zsperske
09/26/2023, 9:22 PMyeah I’d be happy to, do I file it via the google bug tracker or is there somewhere else to file feature requests?
z
Zach Klippenstein (he/him) [MOD]
09/26/2023, 9:22 PMyep the google one, linked in the channel info
z
zsperske
09/26/2023, 9:24 PM👍 thanks! btw I was at your talk on the new text APIs at droidcon sf and enjoyed it!
z
Zach Klippenstein (he/him) [MOD]
09/26/2023, 9:26 PMnp, and thanks! hoping to ship a prototype of
OutputTransformation🎉 4
Zach Klippenstein (he/him) [MOD]
09/26/2023, 9:27 PMalso can you link your FR here please
z
zsperske
09/26/2023, 9:34 PMz
Zach Klippenstein (he/him) [MOD]
09/26/2023, 9:35 PMz
zsperske
09/26/2023, 9:36 PM🤯 talk about turnaround time!
zsperske
09/26/2023, 9:36 PMThanks a million!
z
Zach Klippenstein (he/him) [MOD]
09/26/2023, 9:36 PMyou had good timing, I just finished another change 😛
😂 1
🥳 1
z
zsperske
09/26/2023, 9:38 PM🫡
j
Jacob Ras
09/26/2023, 9:56 PMNice addition. Until now I've been using
composeRule.waitUntilAtLeastOneExists(hasTestTag("x"))z
Zach Klippenstein (he/him) [MOD]
09/26/2023, 9:57 PMWanna +1 that FR?
j
Jacob Ras
09/26/2023, 10:13 PMI do! Done.
gratitude thank you 1
v
vide
09/26/2023, 10:14 PMMy team also has also had custom implementation for this specific case for a long time, +1'd
gratitude thank you 1
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