test: add Compose tests for SettingContent to verify displayed texts

Author: superus8r

app/build.gradle.kts

@@ -291,6 +291,8 @@ dependencies {
 
     // Instrumented Test Libraries
     androidTestImplementation(composeBom)
+    androidTestImplementation(libs.compose.ui.test.junit4)
+    debugImplementation(libs.compose.ui.test.manifest)
     androidTestImplementation(libs.coroutines.test)
     androidTestImplementation(libs.androidx.test.core)
     androidTestImplementation(libs.androidx.test.ext.junit)

app/src/androidTest/java/org/kabiri/android/usbterminal/ui/setting/SettingContentAndroidTest.kt

@@ -0,0 +1,76 @@
+package org.kabiri.android.usbterminal.ui.setting
+
+import androidx.activity.ComponentActivity
+import androidx.compose.ui.test.assertIsDisplayed
+import androidx.compose.ui.test.junit4.createAndroidComposeRule
+import androidx.compose.ui.test.onNodeWithText
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import io.mockk.every
+import io.mockk.mockk
+import kotlinx.coroutines.flow.flowOf
+import org.hamcrest.CoreMatchers.notNullValue
+import org.hamcrest.MatcherAssert.assertThat
+import org.junit.Rule
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.kabiri.android.usbterminal.R
+import org.kabiri.android.usbterminal.ui.theme.UsbTerminalTheme
+
+@RunWith(AndroidJUnit4::class)
+class SettingContentAndroidTest {
+    @get:Rule
+    val composeRule = createAndroidComposeRule<ComponentActivity>()
+
+    private fun showContet(viewModel: SettingViewModel) {
+        composeRule.setContent {
+            UsbTerminalTheme {
+                SettingContent(
+                    settingViewModel = viewModel,
+                    onDismiss = {},
+                )
+            }
+        }
+    }
+
+    @Test
+    fun settingContent_displaysExpectedTexts() {
+        // arrange
+        val context = composeRule.activity
+        assertThat(context, notNullValue())
+        val viewModel = mockk<SettingViewModel>(relaxed = true)
+        every { viewModel.currentBaudRate } returns flowOf(9600)
+        every { viewModel.currentAutoScroll } returns flowOf(true)
+
+        // act
+        showContet(viewModel)
+
+        // assert
+        composeRule.onNodeWithText(context.getString(R.string.settings_title)).assertIsDisplayed()
+        composeRule
+            .onNodeWithText(context.getString(R.string.settings_subtitle))
+            .assertIsDisplayed()
+
+        // Baud rate label (ensure unmerged tree so label is found)
+        composeRule
+            .onNodeWithText(
+                context.getString(R.string.settings_label_baud_rate),
+                useUnmergedTree = true,
+            ).assertIsDisplayed()
+
+        // Buttons and bottom text
+        composeRule
+            .onNodeWithText(context.getString(R.string.settings_bt_reset_default))
+            .assertIsDisplayed()
+        composeRule
+            .onNodeWithText(context.getString(R.string.settings_bt_dismiss_sheet))
+            .assertIsDisplayed()
+        composeRule
+            .onNodeWithText(context.getString(R.string.settings_bottom_text))
+            .assertIsDisplayed()
+
+        // Auto-scroll label
+        composeRule
+            .onNodeWithText(context.getString(R.string.settings_label_auto_scroll))
+            .assertIsDisplayed()
+    }
+}

gradle/libs.versions.toml

@@ -64,6 +64,8 @@ compose-foundation = { module = "androidx.compose.foundation:foundation" }
 compose-material3 = { module = "androidx.compose.material3:material3" }
 compose-ui-tooling-preview = { module = "androidx.compose.ui:ui-tooling-preview" }
 compose-ui-tooling = { module = "androidx.compose.ui:ui-tooling" }
+compose-ui-test-junit4 = { module = "androidx.compose.ui:ui-test-junit4" }
+compose-ui-test-manifest = { module = "androidx.compose.ui:ui-test-manifest" }
 
 # --- Google/Material ---
 material = { module = "com.google.android.material:material", version.ref = "material" }