同时运行多个测试时测试失败

Question

我编写了用于测试片段的代码。编写了测试方法testChangeSystemsMeasuresToMetric，testChangeSystemsMeasuresToImperial，checkFragmentOpen，但如果同时运行它们，则testChangeSystemsMeasuresToImperial会失败，并出现androidx.test.espresso.AmbiguousViewMatcherException：'是可分配的类类错误。问题视图标记为'**** MATCHES **** '在下面。同时，每个测试都成功完成，并且如果您同时运行testChangeSystemsMeasuresToImperial和testChangeSystemsMeasuresToMetric，则所有测试将成功运行。可能是什么问题？

class ProfileFragmentTest {
    @Rule
    @JvmField
    val activityRule = ActivityTestRule(MainActivity::class.java)

    @Rule
    @JvmField
    val dataBindingIdlingResourceRule = DataBindingIdlingResourceRule(activityRule)

    private val testProfile = Profile(SystemsMeasures.Metric, ObservableBoolean(true),
            ObservableInt(0), ObservableDouble(0.0))

    @Before
    fun setUp() {
        CurrentProfile.currentProfile = testProfile

        onView(withId(R.id.drawer_layout))
                .check(matches(isClosed(Gravity.LEFT)))
                .perform(DrawerActions.open());

        onView(withId(R.id.nav_view))
                .perform(NavigationViewActions.navigateTo(R.id.nav_profile))
    }

    @Test
    fun checkFragmentOpen() {
        onView(withId(R.id.profile_fragment)).check(matches(isDisplayed()));
    }

    @Test
    fun testChangeSystemsMeasuresToImperial() {
        val itemText: String = InstrumentationRegistry.getInstrumentation().targetContext.getString(R.string.poundsMassUnit)
        clickChangeSystemsMeasures(itemText)
        assert(testProfile.systemMeasures == SystemsMeasures.Imperial)
    }

    @Test
    fun testChangeSystemsMeasuresToMetric() {
        testProfile.systemMeasures = SystemsMeasures.Imperial
        val itemText: String = InstrumentationRegistry.getInstrumentation().targetContext.getString(R.string.kilogramsMassUnit)
        clickChangeSystemsMeasures(itemText)
        assert(testProfile.systemMeasures == SystemsMeasures.Metric)
    }

     private fun clickChangeSystemsMeasures(itemText: String) {
        val spinnerId: Int = R.id.spinner
        onView(withId(spinnerId)).perform(click())
        onData(allOf(`is`(instanceOf(String::class.java)), `is`(itemText))).perform(click())
    }

}

Answer 1

我能够通过协调器解决我的问题

build.gradle

dependencies{
    androidTestUtil 'androidx.test:orchestrator:1.2.0'
}

android{
    testOptions {
        execution 'ANDROIDX_TEST_ORCHESTRATOR'
    }
}

确实，我仍然不明白问题出在什么地方，如果您告诉我为什么会出现此问题，我将不胜感激。