does anyone have any working samples of testing co...

# compose

[pula]

does anyone have any working samples of testing composable functions? im getting E/TestRunner: java.lang.RuntimeException: Could not launch activity when I attempt to use createComposeRule(). or am I trying to use something that isn’t ready?

@RunWith(JUnit4::class)
class SampleTests {

    @get:Rule
    val composeTestRule = createComposeRule(disableTransitions = true)

    @Test
    fun twoComponents_areChecked() {
        composeTestRule.setContent {
            MaterialTheme {
                Surface {
                    Column {
                        Checkbox(checked = true, onCheckedChange = null)
                        Checkbox(checked = true, onCheckedChange = null)
                    }
                }
            }
        }

        findAll(isOn())
            .assertCountEquals(2)
            .forEach {
                it.assertIsOn()
            }
    }
}

[Ryan Mentley]

rest of the stack trace?

[pula]

java.lang.RuntimeException: Could not launch activity
at androidx.test.runner.MonitoringInstrumentation.startActivitySync(MonitoringInstrumentation.java:495)
at androidx.test.rule.ActivityTestRule.launchActivity(ActivityTestRule.java:358)
at androidx.test.rule.ActivityTestRule$ActivityStatement.evaluate(ActivityTestRule.java:529)
at org.junit.rules.RunRules.evaluate(RunRules.java:20)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runners.Suite.runChild(Suite.java:128)
at org.junit.runners.Suite.runChild(Suite.java:27)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at org.junit.runner.JUnitCore.run(JUnitCore.java:115)
at androidx.test.internal.runner.TestExecutor.execute(TestExecutor.java:56)
at androidx.test.runner.AndroidJUnitRunner.onStart(AndroidJUnitRunner.java:392)
at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:2189)
Caused by: java.lang.RuntimeException: Unable to resolve activity for: Intent { act=android.intent.action.MAIN flg=0x14000000 cmp=soffrito.libraries.design.test/android.app.Activity }
at android.app.Instrumentation.startActivitySync(Instrumentation.java:501)
at android.app.Instrumentation.startActivitySync(Instrumentation.java:464)
at androidx.test.runner.MonitoringInstrumentation.access$201(MonitoringInstrumentation.java:99)
at androidx.test.runner.MonitoringInstrumentation$4.call(MonitoringInstrumentation.java:471)
at androidx.test.runner.MonitoringInstrumentation$4.call(MonitoringInstrumentation.java:468)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
at java.lang.Thread.run(Thread.java:919)

[Ryan Mentley]

Declare the Activity in your manifest:

<activity android:name="android.app.Activity" android:theme="@style/some_theme_goes_here"/>

[Ryan Mentley]

from: Caused by: java.lang.RuntimeException: Unable to resolve activity for: Intent { act=android.intent.action.MAIN flg=0x14000000 cmp=soffrito.libraries.design.test/android.app.Activity }

[pula]

🤦

[pula]

thank you!

[Ryan Mentley]

no problem!

[codeslubber]

are there any official tests anywhere? or plans for them?

[pula]

i’ve just been looking at the various UI composables and looking at the tests google is writing https://cs.android.com/androidx/platform/frameworks/support/+/androidx-master-dev:ui/ui-test/src/androidTest/java/androidx/ui/test/FindAllTest.kt?q=findAllTest_twoComponents_areChecked&ss=androidx%2Fplatform%2Fframeworks%2Fsupport

[codeslubber]

thanks, interesting (if ugly)…

[pula]

yea, easier reading the Text composable vs TextView 😂

https://github.com/aosp-mirror/platform_frameworks_base/blob/master/core/java/android/widget/TextView.java

[sindrenm]

For the question regarding official tests, I guess these here are kinda “official”, but they're not plentiful:

https://github.com/android/compose-samples/tree/master/JetNews/app/src/androidTest/java/com/example/jetnews