Created
June 15, 2017 19:31
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Kotlin functions creating custom Hamcrest matchers for Android
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| import android.view.View | |
| import org.hamcrest.Description | |
| import org.hamcrest.Matcher | |
| import org.hamcrest.TypeSafeMatcher | |
| inline fun <reified T : View> withType(): Matcher<View> = object : TypeSafeMatcher<View>() { | |
| override fun describeTo(description: Description?) { | |
| description?.appendText("with type: ${T::class.java.name}") | |
| } | |
| override fun matchesSafely(item: View?): Boolean = | |
| item.let { it is T } | |
| } |
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Usage:
onView(withType<Button>())