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android-testing

android-testing

github.com/new-silvermoonTesting & quality992844 installsUpdated 13w ago
Repository

About android-testing

android-testing is a guidance skill for developers testing Android applications, covering unit, integration, and Compose UI screenshot tests. It includes dependency setup examples, Hilt testing patterns, and Gradle commands for recording and verifying Roborazzi screenshots.

Key features

  1. 01Explain unit, integration, and UI testing
  2. 02Show Hilt dependency-injection test setup
  3. 03Configure Roborazzi screenshot tests
  4. 04Provide Gradle test and screenshot commands

Use cases

  1. 01Plan a testing strategy across Android app layers
  2. 02Add screenshot regression checks for Compose screens

Install

Copy the command and run it in a terminal.

$npx skills add https://github.com/new-silvermoon/awesome-android-agent-skills --skill android-testing

After installing, type/android-testingin Claude Code to confirm it loaded.

Details

From the project README

Android Testing Strategies

This skill provides expert guidance on testing modern Android applications, inspired by "Now in Android". It covers Unit Tests, Hilt Integration Tests, and Screenshot Testing.

Testing Pyramid

  1. Unit Tests: Fast, isolate logic (ViewModels, Repositories).
  2. Integration Tests: Test interactions (Room DAOs, Retrofit vs MockWebServer).
  3. UI/Screenshot Tests: Verify UI correctness (Compose).

Dependencies (libs.versions.toml)

Ensure you have the right testing dependencies.

[libraries]
junit4 = { module = "junit:junit", version = "4.13.2" }
kotlinx-coroutines-test = { group = "org.jetbrains.kotlinx", name = "kotlinx-coroutines-test", version.ref = "kotlinxCoroutines" }
androidx-test-ext-junit = { group = "androidx.test.ext", name = "junit", version = "1.1.5" }
espresso-core = { group = "androidx.test.espresso", name = "espresso-core", version = "3.5.1" }
compose-ui-test = { group = "androidx.compose.ui", name = "ui-test-junit4" }
hilt-android-testing = { group = "com.google.dagger", name = "hilt-android-testing", version.ref = "hilt" }
roborazzi = { group = "io.github.takahirom.roborazzi", name = "roborazzi", version.ref = "roborazzi" }

Screenshot Testing with Roborazzi

Screenshot tests ensure your UI doesn't regress visually. NiA uses Roborazzi because it runs on the JVM (fast) without needing an emulator.

Setup
  1. Add the plugin to libs.versions.toml: 
    [plugins]
roborazzi = { id = "io.github.takahirom.roborazzi", version.ref = "roborazzi" }
  2. Apply it in your module's build.gradle.kts: 
    plugins {
    alias(libs.plugins.roborazzi)
}
Writing a Screenshot Test
@RunWith(AndroidJUnit4::class)
@GraphicsMode(GraphicsMode.Mode.NATIVE)
@Config(sdk = [33], qualifiers = RobolectricDeviceQualifiers.Pixel5)
class MyScreenScreenshotTest {

    @get:Rule
    val composeTestRule = createAndroidComposeRule<ComponentActivity>()

    @Test
    fun captureMyScreen() {
        composeTestRule.setContent {
            MyTheme {
                MyScreen()
            }
        }

        composeTestRule.onRoot()
            .captureRoboImage()
    }
}

Hilt Testing

Use HiltAndroidRule to inject dependencies in tests.

@HiltAndroidTest
class MyDaoTest {

    @get:Rule
    var hiltRule = HiltAndroidRule(this)

    @Inject
    lateinit var database: MyDatabase
    private lateinit var dao: MyDao

    @Before
    fun init() {
        hiltRule.inject()
        dao = database.myDao()
    }
    
    // ... tests
}

Running Tests

  • Unit: ./gradlew test
  • Screenshots: ./gradlew recordRoborazziDebug (to record) / ./gradlew verifyRoborazziDebug (to verify)

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