Compose插桩测试用含空格反引号方法名触发R8版本兼容错误

在Compose插桩测试中使用反引号定义包含空格的测试方法名时，编译触发错误；移除反引号和空格后测试可正常编译。

编译错误信息 #

Caused by: com.android.tools.r8.internal.Jj: com.android.tools.r8.internal.Jc: Space characters in SimpleName 'given a closebottomsheetevent eventlistener on close bottom sheet should be called' are not allowed prior to DEX version 040

测试代码示例 #

package com.dooitu.mobile.android.ui.homefeed

import android.content.Context
import androidx.activity.ComponentActivity
import androidx.compose.runtime.State
import androidx.compose.runtime.mutableStateOf
import androidx.compose.ui.test.junit4.createAndroidComposeRule
import com.dooitu.mobile.android.ui.homefeed.components.HomeFeedEvent
import com.dooitu.mobile.android.ui.homefeed.models.HomeFeedScreenEventListener
import com.dooitu.mobile.android.ui.theme.DooituTheme
import org.junit.Rule
import org.junit.Test
import org.koin.androidx.compose.get

class HomeFeedScreenTest {
    @get:Rule
    // Use a dummy activity instead of real MainActivity
    val composeTestRule = createAndroidComposeRule<ComponentActivity>()
    private var triggeredEventId: Int? = null
    private val eventListener = object : HomeFeedScreenEventListener {
        override fun onCloseBottomSheet() {
            triggeredEventId = ON_CLOSE_BOTTOM_SHEET_EVENT_ID
        }

        override fun onOpenComments(postId: String, numberOfComments: Int) {
            triggeredEventId = ON_OPEN_COMMENTS_EVENT_ID
        }

        override fun onOpenShare(shareLink: String, context: Context) {
            TODO("Not yet implemented")
        }

        override fun onOpenPostSingleView(postId: String) {
            TODO("Not yet implemented")
        }

        override fun onOpenPostActions(postId: String, userId: String) {
            TODO("Not yet implemented")
        }

        override fun onOpenPostDetails(postId: String) {
            TODO("Not yet implemented")
        }

        override fun onProfileImageClicked(userId: String, isCurrentUser: Boolean) {
            TODO("Not yet implemented")
        }
    }
    private val updateViewModel = HomeFeedUpdateViewModel()

    private fun startScenario(state: State<HomeFeedState>) {
        composeTestRule.setContent {
            DooituTheme.SurfaceContainer {
                HomeFeedScreen(
                    state = state,
                    viewModel = get(),
                    cacheDataSourceFactory = get(),
                    getReloadedPostFlow = updateViewModel::reloadedPost,
                    eventsListener = eventListener,
                    logScreenView = {}
                )
            }
        }
    }

    @Test
    fun `given a closebottomsheetevent eventlistener on close bottom sheet should be called` () {
        val closeBottomSheetState = mutableStateOf(
            HomeFeedState(
                emptyList(),
                emptyList(),
                event = HomeFeedEvent.CloseBottomSheet
            )
        )
        // Start the app
        startScenario(closeBottomSheetState)
        assert(triggeredEventId == ON_CLOSE_BOTTOM_SHEET_EVENT_ID)
    }
}

解决方案 #

原因说明 #

DEX版本低于040（对应Android 13/API 33）时，字节码不允许方法名包含空格。Kotlin中用反引号定义的带空格方法名，编译后会直接保留空格，因此触发R8的校验错误。

方案1：升级DEX版本至040及以上 #

在模块的build.gradle.kts（或build.gradle）中配置编译、目标SDK版本为33+，并指定DEX目标版本：

android {
    compileSdk = 33
    targetSdk = 33

    dexOptions {
        targetDexVersion = "040"
    }
}

注意：升级targetSdk到33需要适配Android 13的权限及行为变更，需确认项目兼容性。

方案2：使用@DisplayName注解替代空格方法名 #

保持方法名符合Java字节码规范（无空格），同时通过@DisplayName注解设置测试报告中显示的友好名称：

import org.junit.jupiter.api.DisplayName

// ...

@Test
@DisplayName("given a closebottomsheetevent eventlistener on close bottom sheet should be called")
fun givenCloseBottomSheetEventEventListenerOnCloseBottomSheetShouldBeCalled() {
    val closeBottomSheetState = mutableStateOf(
        HomeFeedState(
            emptyList(),
            emptyList(),
            event = HomeFeedEvent.CloseBottomSheet
        )
    )
    startScenario(closeBottomSheetState)
    assert(triggeredEventId == ON_CLOSE_BOTTOM_SHEET_EVENT_ID)
}

该方案无需升级SDK版本，兼容所有Android版本，同时测试报告仍能显示清晰的测试描述。

内容的提问来源于stack exchange，提问作者Nicola Gallazzi