android - 是否可以断言节点在 jetpack compose 测试中是可滚动的

Question

执行测试时是否可以断言 jetpack compose 节点是可滚动的？

class MyTest {
    @get:Rule
    val composeTestRule = createComposeRule()

    @Test
    fun givenEnoughItems_thenAssertListIsScrollable() {
        composeTestRule.setContent {
            BasicTheme {
                ScrollableComponent(items = List(1000) { "$it" })
            }
        }

        composeTestRule.onRoot().fetchSemanticsNode().assertIsScrollable()
    }
}

fun SemanticsNodeInteraction.assertIsScrollable() : SemanticsNodeInteraction {
    // What would go here? 
}

标签： androidandroid-jetpack-composeandroid-testingandroid-jetpack-compose-testing

Answer 1

使用hasScrollAction().

例子

import androidx.compose.ui.test.hasScrollAction
import androidx.compose.ui.test.assert

private fun assertNodeIsScrollable() {
    findNode().assert(hasScrollAction())
}

并且findNode()会像

private fun findNode(): SemanticsNodeInteraction {
    return composeTestRule.onNodeWithTag(
        testTag = "test_tag",
    )
}