PM-18877 Respect system app specific language selection on Android 13 and up. (#4849)

app/src/test/java/com/x8bit/bitwarden/MainViewModelTest.kt

@@ -97,6 +97,7 @@ class MainViewModelTest : BaseViewModelTest() {
         every { isScreenCaptureAllowed } returns true
         every { isScreenCaptureAllowedStateFlow } returns mutableScreenCaptureAllowedFlow
         every { storeUserHasLoggedInValue(any()) } just runs
+        every { appLanguage = any() } just runs
     }
     private val authRepository = mockk<AuthRepository> {
         every { activeUserId } returns DEFAULT_USER_STATE.activeUserId
@@ -1090,6 +1091,15 @@ class MainViewModelTest : BaseViewModelTest() {
         verify { appResumeManager.setResumeScreen(AppResumeScreenData.GeneratorScreen) }
     }
 
+    @Suppress("MaxLineLength")
+    @Test
+    fun `on AppSpecificLanguageUpdate, the repository value should be updated with the specified value`() {
+        val viewModel = createViewModel()
+        viewModel.trySendAction(MainAction.AppSpecificLanguageUpdate(AppLanguage.SPANISH))
+
+        verify { settingsRepository.appLanguage = AppLanguage.SPANISH }
+    }
+
     private fun createViewModel(
         initialSpecialCircumstance: SpecialCircumstance? = null,
     ) = MainViewModel(

app/src/test/java/com/x8bit/bitwarden/ui/platform/feature/settings/appearance/AppearanceViewModelTest.kt

@@ -11,11 +11,14 @@ import io.mockk.just
 import io.mockk.mockk
 import io.mockk.runs
 import io.mockk.verify
+import kotlinx.coroutines.flow.MutableStateFlow
+import kotlinx.coroutines.flow.update
 import kotlinx.coroutines.test.runTest
 import org.junit.jupiter.api.Assertions.assertEquals
 import org.junit.jupiter.api.Test
 
 class AppearanceViewModelTest : BaseViewModelTest() {
+    private val mutableAppLanguageStateFlow = MutableStateFlow(AppLanguage.DEFAULT)
     private val mockSettingsRepository = mockk<SettingsRepository> {
         every { appLanguage } returns AppLanguage.DEFAULT
         every { appTheme } returns AppTheme.DEFAULT
@@ -23,6 +26,7 @@ class AppearanceViewModelTest : BaseViewModelTest() {
         every { isIconLoadingDisabled } returns false
         every { isIconLoadingDisabled = true } just runs
         every { appTheme = AppTheme.DARK } just runs
+        every { appLanguageStateFlow } returns mutableAppLanguageStateFlow
     }
 
     @Test
@@ -48,30 +52,32 @@ class AppearanceViewModelTest : BaseViewModelTest() {
     }
 
     @Test
-    fun `on LanguageChange should update state and store language`() = runTest {
-        val viewModel = createViewModel(
-            settingsRepository = mockSettingsRepository,
-        )
-        viewModel.stateFlow.test {
-            assertEquals(
-                DEFAULT_STATE,
-                awaitItem(),
-            )
-            viewModel.trySendAction(AppearanceAction.LanguageChange(AppLanguage.ENGLISH))
-            assertEquals(
-                DEFAULT_STATE.copy(
-                    language = AppLanguage.ENGLISH,
-                ),
-                awaitItem(),
-            )
-        }
+    fun `on LanguageChange should store updated language in repository`() {
+        val viewModel = createViewModel()
+        viewModel.trySendAction(AppearanceAction.LanguageChange(AppLanguage.ENGLISH))
 
-        verify {
-            mockSettingsRepository.appLanguage
-            mockSettingsRepository.appLanguage = AppLanguage.ENGLISH
-        }
+        verify { mockSettingsRepository.appLanguage = AppLanguage.ENGLISH }
     }
 
+    @Test
+    fun `on AppLanguageStateFlow value updated, view model language state should change`() =
+        runTest {
+            val viewModel = createViewModel()
+            viewModel.stateFlow.test {
+                assertEquals(
+                    DEFAULT_STATE,
+                    awaitItem(),
+                )
+                mutableAppLanguageStateFlow.update { AppLanguage.AFRIKAANS }
+                assertEquals(
+                    DEFAULT_STATE.copy(
+                        language = AppLanguage.AFRIKAANS,
+                    ),
+                    awaitItem(),
+                )
+            }
+        }
+
     @Test
     fun `on ShowWebsiteIconsToggle should update state and store the value`() = runTest {
         val viewModel = createViewModel()

app/src/test/java/com/x8bit/bitwarden/ui/platform/util/LocaleExtensionsTest.kt

@@ -0,0 +1,34 @@
+package com.x8bit.bitwarden.ui.platform.util
+
+import com.x8bit.bitwarden.ui.platform.feature.settings.appearance.model.AppLanguage
+import org.junit.Test
+import org.junit.jupiter.api.Assertions.assertEquals
+import org.junit.jupiter.api.Assertions.assertNull
+import java.util.Locale
+
+class LocaleExtensionsTest {
+
+    @Test
+    fun `locale with Espanol language returns AppLanguage SPANISH`() {
+        val locale = Locale("es")
+        assertEquals(
+            AppLanguage.SPANISH,
+            locale.appLanguage,
+        )
+    }
+
+    @Test
+    fun `locale with GB english returns AppLanguage ENGLISH_BRITISH`() {
+        val locale = Locale("en-GB")
+        assertEquals(
+            AppLanguage.ENGLISH_BRITISH,
+            locale.appLanguage,
+        )
+    }
+
+    @Test
+    fun `locale with non existent app language returns null`() {
+        val locale = Locale("😅😅😅")
+        assertNull(locale.appLanguage)
+    }
+}