Implement CrossFadeTest

Author: jja08111

core/ui/build.gradle.kts

@@ -5,10 +5,17 @@ plugins {
 
 android {
   namespace = "io.jja08111.gemini.core.ui"
+
+  defaultConfig {
+    testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"
+  }
 }
 
 dependencies {
 
   implementation(libs.androidx.compose.ui)
   implementation(libs.androidx.animation.android)
+  androidTestImplementation(libs.androidx.ui.test.junit4.android)
+  androidTestImplementation(libs.androidx.compose.material3)
+  androidTestImplementation(libs.espresso.core)
 }

core/ui/src/androidTest/AndroidManifest.xml

@@ -0,0 +1,5 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+    <application>
+        <activity android:name="androidx.activity.ComponentActivity" />
+    </application>
+</manifest>

core/ui/src/androidTest/java/io/jja08111/gemini/core/ui/CrossFadeTest.kt

@@ -0,0 +1,55 @@
+package io.jja08111.gemini.core.ui
+
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.runtime.getValue
+import androidx.compose.runtime.mutableStateOf
+import androidx.compose.runtime.setValue
+import androidx.compose.ui.test.assertIsDisplayed
+import androidx.compose.ui.test.assertIsNotDisplayed
+import androidx.compose.ui.test.junit4.createComposeRule
+import androidx.compose.ui.test.onNodeWithText
+import org.junit.Rule
+import org.junit.Test
+
+class CrossFadeTest {
+  @get:Rule
+  val composeRule = createComposeRule()
+
+  @Test
+  fun shouldSwitchToSecondComponent() {
+    var showFirst by mutableStateOf(true)
+    composeRule.setContent {
+      CrossFade(
+        showFirst = showFirst,
+        firstContent = { FirstComponent() },
+        secondContent = { SecondComponent() },
+      )
+    }
+
+    composeRule.onNodeWithText(FIRST_TITLE).assertIsDisplayed()
+    composeRule.onNodeWithText(SECOND_TITLE).assertIsNotDisplayed()
+
+    showFirst = false
+
+    composeRule.onNodeWithText(FIRST_TITLE).assertIsNotDisplayed()
+    composeRule.onNodeWithText(SECOND_TITLE).assertIsDisplayed()
+  }
+
+  @Suppress("TestFunctionName")
+  @Composable
+  private fun FirstComponent() {
+    Text(text = FIRST_TITLE)
+  }
+
+  @Suppress("TestFunctionName")
+  @Composable
+  private fun SecondComponent() {
+    Text(text = SECOND_TITLE)
+  }
+
+  companion object {
+    private const val FIRST_TITLE = "First"
+    private const val SECOND_TITLE = "Second"
+  }
+}

gradle/libs.versions.toml

@@ -20,7 +20,7 @@ kotlin = "1.9.22"
 hilt = "2.50"
 junit = "4.13.2"
 androidx-test-ext-junit = "1.1.5"
-espresso-core = "3.5.1"
+espresso-core = "3.5.0"
 material = "1.11.0"
 ktlint = "12.1.0"
 ksp = "1.9.22-1.0.17"
@@ -30,6 +30,7 @@ androidDesugarJdkLibs = "2.0.4"
 glideCompose = "1.0.0-beta01"
 kotlinCoroutineTest = "1.6.4"
 robolectric = "4.13"
+uiTestJunit4Android = "1.6.8"
 
 # Wearables
 playServicesWearable = "18.1.0"
@@ -72,6 +73,7 @@ hilt-android-compiler = { group = "com.google.dagger", name = "hilt-android-comp
 glide-compose = { group = "com.github.bumptech.glide", name = "compose", version.ref = "glideCompose" }
 kotlin-coroutine-test = { group = "org.jetbrains.kotlinx", name = "kotlinx-coroutines-test", version.ref = "kotlinCoroutineTest" }
 robolectric = { group = "org.robolectric", name = "robolectric", version.ref = "robolectric" }
+androidx-ui-test-junit4-android = { group = "androidx.compose.ui", name = "ui-test-junit4-android", version.ref = "uiTestJunit4Android" }
 
 # Wearables
 play-services-wearable = { module = "com.google.android.gms:play-services-wearable", version.ref = "playServicesWearable" }