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MihaiCristianCondreaMihaiCristianCondrea
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Add unit tests for OnboardingViewModel preferences
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‎app/src/test/java/com/d4rk/androidtutorials/java/ui/screens/onboarding/OnboardingViewModelTest.java‎

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package com.d4rk.androidtutorials.java.ui.screens.onboarding;
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import static org.junit.Assert.assertEquals;
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import static org.mockito.ArgumentMatchers.anyBoolean;
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import static org.mockito.ArgumentMatchers.anyString;
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import static org.mockito.Mockito.clearInvocations;
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import static org.mockito.Mockito.mockStatic;
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import static org.mockito.Mockito.times;
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import static org.mockito.Mockito.verify;
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import static org.mockito.Mockito.when;
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import android.content.Context;
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import android.content.SharedPreferences;
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import android.content.res.Resources;
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import androidx.appcompat.app.AppCompatDelegate;
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import androidx.preference.PreferenceManager;
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import com.d4rk.androidtutorials.java.R;
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import org.junit.After;
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import org.junit.Before;
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import org.junit.Test;
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import org.junit.runner.RunWith;
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import org.mockito.Mock;
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import org.mockito.MockedStatic;
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import org.mockito.junit.MockitoJUnitRunner;
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@RunWith(MockitoJUnitRunner.class)
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public class OnboardingViewModelTest {
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private static final String THEME_KEY = "theme";
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private static final String DEFAULT_TAB_KEY = "default_tab";
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private static final String BOTTOM_NAV_LABELS_KEY = "labels";
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private static final String MONOSPACE_FONT_KEY = "monospace_font";
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private static final String CRASHLYTICS_KEY = "firebase_crashlytics";
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private static final String CONSENT_ANALYTICS_KEY = "consent_analytics_storage";
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private static final String CONSENT_AD_STORAGE_KEY = "consent_ad_storage";
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private static final String CONSENT_AD_USER_DATA_KEY = "consent_ad_user_data";
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private static final String CONSENT_AD_PERSONALIZATION_KEY = "consent_ad_personalization";
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private static final String ONBOARDING_COMPLETE_KEY = "onboarding_complete";
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private static final String[] THEME_VALUES = new String[]{"MODE_NIGHT_FOLLOW_SYSTEM", "MODE_NIGHT_NO"};
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private static final String[] TAB_VALUES = new String[]{"home", "android_studio"};
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private static final String[] BOTTOM_NAV_LABEL_VALUES = new String[]{"labeled", "selected"};
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private static final String[] CODE_FONT_VALUES = new String[]{"0", "1"};
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@Mock
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private Context context;
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@Mock
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private Resources resources;
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@Mock
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private SharedPreferences sharedPreferences;
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@Mock
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private SharedPreferences.Editor editor;
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private MockedStatic<PreferenceManager> preferenceManagerMock;
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private MockedStatic<AppCompatDelegate> appCompatDelegateMock;
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@Before
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public void setUp() {
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when(context.getResources()).thenReturn(resources);
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when(sharedPreferences.edit()).thenReturn(editor);
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when(editor.putString(anyString(), anyString())).thenReturn(editor);
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when(editor.putBoolean(anyString(), anyBoolean())).thenReturn(editor);
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when(context.getString(R.string.key_theme)).thenReturn(THEME_KEY);
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when(context.getString(R.string.key_default_tab)).thenReturn(DEFAULT_TAB_KEY);
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when(context.getString(R.string.key_bottom_navigation_bar_labels)).thenReturn(BOTTOM_NAV_LABELS_KEY);
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when(context.getString(R.string.key_monospace_font)).thenReturn(MONOSPACE_FONT_KEY);
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when(context.getString(R.string.key_firebase_crashlytics)).thenReturn(CRASHLYTICS_KEY);
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when(context.getString(R.string.key_consent_analytics)).thenReturn(CONSENT_ANALYTICS_KEY);
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when(context.getString(R.string.key_consent_ad_storage)).thenReturn(CONSENT_AD_STORAGE_KEY);
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when(context.getString(R.string.key_consent_ad_user_data)).thenReturn(CONSENT_AD_USER_DATA_KEY);
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when(context.getString(R.string.key_consent_ad_personalization)).thenReturn(CONSENT_AD_PERSONALIZATION_KEY);
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when(context.getString(R.string.key_onboarding_complete)).thenReturn(ONBOARDING_COMPLETE_KEY);
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when(resources.getStringArray(R.array.preference_theme_values)).thenReturn(THEME_VALUES);
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when(resources.getStringArray(R.array.preference_default_tab_values)).thenReturn(TAB_VALUES);
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when(resources.getStringArray(R.array.preference_bottom_navigation_bar_labels_values)).thenReturn(BOTTOM_NAV_LABEL_VALUES);
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when(resources.getStringArray(R.array.code_font_values)).thenReturn(CODE_FONT_VALUES);
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preferenceManagerMock = mockStatic(PreferenceManager.class);
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preferenceManagerMock.when(() -> PreferenceManager.getDefaultSharedPreferences(context)).thenReturn(sharedPreferences);
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appCompatDelegateMock = mockStatic(AppCompatDelegate.class);
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}
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@After
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public void tearDown() {
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preferenceManagerMock.close();
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appCompatDelegateMock.close();
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}
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private OnboardingViewModel createViewModelWithExistingPrefs() {
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when(sharedPreferences.contains(THEME_KEY)).thenReturn(true);
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when(sharedPreferences.contains(DEFAULT_TAB_KEY)).thenReturn(true);
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return new OnboardingViewModel(context);
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}
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@Test
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public void constructor_initializesDefaults_whenPreferencesMissing() {
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when(sharedPreferences.contains(THEME_KEY)).thenReturn(false);
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when(sharedPreferences.contains(DEFAULT_TAB_KEY)).thenReturn(false);
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new OnboardingViewModel(context);
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appCompatDelegateMock.verify(() -> AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_FOLLOW_SYSTEM));
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verify(editor).putString(THEME_KEY, THEME_VALUES[0]);
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verify(editor).putString(DEFAULT_TAB_KEY, TAB_VALUES[0]);
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verify(editor, times(2)).apply();
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}
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@Test
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public void setTheme_persistsValue_andGetThemeReturnsValue() {
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OnboardingViewModel viewModel = createViewModelWithExistingPrefs();
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clearInvocations(editor, sharedPreferences);
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String newTheme = THEME_VALUES[1];
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viewModel.setTheme(newTheme);
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verify(editor).putString(THEME_KEY, newTheme);
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verify(editor).apply();
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when(sharedPreferences.getString(THEME_KEY, THEME_VALUES[0])).thenReturn(newTheme);
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assertEquals(newTheme, viewModel.getTheme());
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verify(sharedPreferences).getString(THEME_KEY, THEME_VALUES[0]);
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}
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@Test
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public void setDefaultTab_persistsValue() {
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OnboardingViewModel viewModel = createViewModelWithExistingPrefs();
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clearInvocations(editor);
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String newTab = TAB_VALUES[1];
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viewModel.setDefaultTab(newTab);
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verify(editor).putString(DEFAULT_TAB_KEY, newTab);
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verify(editor).apply();
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}
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@Test
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public void setBottomNavLabels_persistsValue_andGetBottomNavLabelsReturnsValue() {
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OnboardingViewModel viewModel = createViewModelWithExistingPrefs();
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clearInvocations(editor, sharedPreferences);
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String newValue = BOTTOM_NAV_LABEL_VALUES[1];
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viewModel.setBottomNavLabels(newValue);
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verify(editor).putString(BOTTOM_NAV_LABELS_KEY, newValue);
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verify(editor).apply();
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when(sharedPreferences.getString(BOTTOM_NAV_LABELS_KEY, BOTTOM_NAV_LABEL_VALUES[0])).thenReturn(newValue);
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assertEquals(newValue, viewModel.getBottomNavLabels());
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verify(sharedPreferences).getString(BOTTOM_NAV_LABELS_KEY, BOTTOM_NAV_LABEL_VALUES[0]);
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}
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@Test
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public void setMonospaceFont_persistsValue_andGetMonospaceFontReturnsValue() {
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OnboardingViewModel viewModel = createViewModelWithExistingPrefs();
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clearInvocations(editor, sharedPreferences);
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String newFont = CODE_FONT_VALUES[1];
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viewModel.setMonospaceFont(newFont);
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verify(editor).putString(MONOSPACE_FONT_KEY, newFont);
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verify(editor).apply();
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when(sharedPreferences.getString(MONOSPACE_FONT_KEY, CODE_FONT_VALUES[0])).thenReturn(newFont);
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assertEquals(newFont, viewModel.getMonospaceFont());
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verify(sharedPreferences).getString(MONOSPACE_FONT_KEY, CODE_FONT_VALUES[0]);
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}
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@Test
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public void booleanSetters_persistValues() {
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OnboardingViewModel viewModel = createViewModelWithExistingPrefs();
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clearInvocations(editor);
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viewModel.setCrashlyticsEnabled(true);
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verify(editor).putBoolean(CRASHLYTICS_KEY, true);
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viewModel.setConsentAnalytics(false);
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verify(editor).putBoolean(CONSENT_ANALYTICS_KEY, false);
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viewModel.setConsentAdStorage(true);
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verify(editor).putBoolean(CONSENT_AD_STORAGE_KEY, true);
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viewModel.setConsentAdUserData(false);
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verify(editor).putBoolean(CONSENT_AD_USER_DATA_KEY, false);
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viewModel.setConsentAdPersonalization(true);
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verify(editor).putBoolean(CONSENT_AD_PERSONALIZATION_KEY, true);
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verify(editor, times(5)).apply();
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}
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@Test
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public void markOnboardingComplete_persistsFlag() {
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OnboardingViewModel viewModel = createViewModelWithExistingPrefs();
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clearInvocations(editor);
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viewModel.markOnboardingComplete();
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verify(editor).putBoolean(ONBOARDING_COMPLETE_KEY, true);
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verify(editor).apply();
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}
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@Test
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public void setCurrentPage_updatesState() {
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OnboardingViewModel viewModel = createViewModelWithExistingPrefs();
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viewModel.setCurrentPage(2);
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assertEquals(2, viewModel.getCurrentPage());
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}
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}

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