add tests for handling shared preference changes in MainActivityTest

Author: 314systems

app/src/test/kotlin/com/vrem/wifianalyzer/MainActivityTest.kt

@@ -21,18 +21,22 @@ import android.content.SharedPreferences
 import android.os.Build
 import android.view.Menu
 import android.view.MenuItem
+import androidx.appcompat.app.AppCompatDelegate
 import androidx.test.ext.junit.runners.AndroidJUnit4
 import com.google.android.material.navigation.NavigationView
 import com.vrem.util.EMPTY
 import com.vrem.wifianalyzer.navigation.NavigationMenu
 import com.vrem.wifianalyzer.navigation.NavigationMenuController
 import com.vrem.wifianalyzer.navigation.options.OptionMenu
+import com.vrem.wifianalyzer.settings.ThemeStyle
+import com.vrem.wifianalyzer.wifi.accesspoint.ConnectionViewType
 import org.assertj.core.api.Assertions.assertThat
 import org.junit.After
 import org.junit.Test
 import org.junit.runner.RunWith
 import org.mockito.kotlin.mock
 import org.mockito.kotlin.never
+import org.mockito.kotlin.spy
 import org.mockito.kotlin.verify
 import org.mockito.kotlin.whenever
 import org.robolectric.Robolectric
@@ -239,6 +243,67 @@ class MainActivityTest {
         verify(scannerService).update()
     }
 
+    @Test
+    fun onSharedPreferenceChangedWithLanguageKeyShouldSetLocales() {
+        // setup
+        val scannerService = MainContextHelper.INSTANCE.scannerService
+        val sharedPreferences: SharedPreferences = mock()
+        val languageKey = fixture.getString(R.string.language_key)
+        val languageTag = "en"
+        whenever(sharedPreferences.getString(languageKey, "")).thenReturn(languageTag)
+        // execute
+        fixture.onSharedPreferenceChanged(sharedPreferences, languageKey)
+        // validate
+        verify(scannerService).update()
+        assertThat(AppCompatDelegate.getApplicationLocales().toLanguageTags()).isEqualTo(languageTag)
+    }
+
+    @Test
+    fun onSharedPreferenceChangedWithLanguageKeyAndEmptyTagShouldSetEmptyLocales() {
+        // setup
+        val scannerService = MainContextHelper.INSTANCE.scannerService
+        val sharedPreferences: SharedPreferences = mock()
+        val languageKey = fixture.getString(R.string.language_key)
+        whenever(sharedPreferences.getString(languageKey, "")).thenReturn("")
+        // execute
+        fixture.onSharedPreferenceChanged(sharedPreferences, languageKey)
+        // validate
+        verify(scannerService).update()
+        assertThat(AppCompatDelegate.getApplicationLocales().isEmpty).isTrue
+    }
+
+    @Test
+    fun onSharedPreferenceChangedWithThemeReloadRequiredShouldStopScannerAndRecreate() {
+        // setup
+        val scannerService = MainContextHelper.INSTANCE.scannerService
+        val settings = MainContextHelper.INSTANCE.settings
+        whenever(settings.themeStyle()).thenReturn(ThemeStyle.BLACK)
+        whenever(settings.connectionViewType()).thenReturn(fixture.mainReload.connectionViewType)
+        val sharedPreferences: SharedPreferences = mock()
+        val spyFixture = spy(fixture)
+        // execute
+        spyFixture.onSharedPreferenceChanged(sharedPreferences, "some_key")
+        // validate
+        verify(scannerService).stop()
+        verify(spyFixture).recreate()
+    }
+
+    @Test
+    fun onSharedPreferenceChangedWithConnectionViewTypeReloadRequiredShouldStopScannerAndRecreate() {
+        // setup
+        val scannerService = MainContextHelper.INSTANCE.scannerService
+        val settings = MainContextHelper.INSTANCE.settings
+        whenever(settings.themeStyle()).thenReturn(fixture.mainReload.themeStyle)
+        whenever(settings.connectionViewType()).thenReturn(ConnectionViewType.HIDE)
+        val sharedPreferences: SharedPreferences = mock()
+        val spyFixture = spy(fixture)
+        // execute
+        spyFixture.onSharedPreferenceChanged(sharedPreferences, "some_key")
+        // validate
+        verify(scannerService).stop()
+        verify(spyFixture).recreate()
+    }
+
     @Test
     fun optionMenu() {
         // execute