@Override
protected void setUp() throws Exception {
    super.setUp();

    mResolver = new MockContentResolver();
    RenamingDelegatingContext targetContextWrapper = new RenamingDelegatingContext(
            new DelegatedMockContext(getContext()), // The context that most methods are delegated to
            getContext(), // The context that file methods are delegated to
            filenamePrefix);
    mProviderContext = new IsolatedContext(mResolver, targetContextWrapper);

    ProviderInfo providerInfo = new ProviderInfo();
    providerInfo.authority = mProviderAuthority;

    mProvider = mProviderClass.newInstance();
    mProvider.attachInfo(mProviderContext, providerInfo);
    assertNotNull(mProvider);
    mResolver.addProvider(mProviderAuthority, mProvider);
}
 

private SQLiteDatabase createTables(final boolean delete, final UniversalSearchContract.Table... tables) {
    SQLiteDatabase db = null;
    final String filenamePrefix = "test.";
    RenamingDelegatingContext targetContextWrapper = new
            RenamingDelegatingContext(
            new MockContext2(), // The context that most methods are
            //delegated to
            getContext(), // The context that file methods are delegated to
            filenamePrefix);
    final Context context = new IsolatedContext(super.getContext().getContentResolver(), targetContextWrapper);
    try {
        db = context.openOrCreateDatabase(DATABASE, 1, null);
        for (final UniversalSearchContract.Table table : tables) {
            table.onCreate(db);
            log("Table " + table + " onCreate successful");
        }
        return db;
    } finally {
        if (null != db && delete) {
            db.close();
            context.deleteDatabase(DATABASE);
        }
    }
}
 

public IsolatedContext getMockContext() {
    return mProviderContext;
}
 

public void testClearBut() throws Exception {
    // We need a package name in this test, thus creating our own mock context
    final IsolatedContext context = getProviderMockContext();

    assertTrue(mProviderHelper.persist(MODULE_A, KEY_A, STRING_A));
    assertTrue(mProviderHelper.persist(MODULE_A, KEY_B, STRING_B));
    assertTrue(mProviderHelper.persist(MODULE_B, KEY_A, STRING_A));
    assertTrue(mProviderHelper.persist(MODULE_B, KEY_B, STRING_B));
    assertTrue(mProviderHelper.persist(MODULE_C, KEY_A, STRING_A));
    assertTrue(mProviderHelper.persist(MODULE_C, KEY_B, STRING_B));
    assertTrue(mProviderHelper.persist(context.getPackageName(), KEY_A, STRING_A));
    assertTrue(mProviderHelper.persist(context.getPackageName(), KEY_B, STRING_B));
    assertUserDatabaseSize(8);

    mProviderHelper.clearBut(new AppPreferences(context),
            new TestTrayModulePreferences(context, MODULE_A),
            new TestTrayModulePreferences(context, MODULE_B));
    assertUserDatabaseSize(6);

    mProviderHelper.clearBut(new TestTrayModulePreferences(context, MODULE_A),
            new TestTrayModulePreferences(context, MODULE_B));
    assertUserDatabaseSize(4);

    mProviderHelper.clearBut(new TestTrayModulePreferences(context, MODULE_A));
    assertUserDatabaseSize(2);

    mProviderHelper.clearBut((TrayPreferences) null);
    assertUserDatabaseSize(0);

    assertTrue(mProviderHelper.persist(MODULE_A, KEY_A, STRING_A));
    assertTrue(mProviderHelper.persist(MODULE_A, KEY_B, STRING_B));
    assertTrue(mProviderHelper.persist(context.getPackageName(), KEY_A, STRING_A));
    assertTrue(mProviderHelper.persist(context.getPackageName(), KEY_B, STRING_B));
    mProviderHelper.clearBut(new AppPreferences(context));
    assertUserDatabaseSize(2);

    // Also test empty values (= clear everything)
    assertTrue(mProviderHelper.persist(MODULE_A, KEY_A, STRING_A));
    assertTrue(mProviderHelper.persist(MODULE_A, KEY_B, STRING_B));

    mProviderHelper.clearBut((TrayPreferences) null);
    assertUserDatabaseSize(0);
}