Android ProviderTestCase2

先前講過Activity Test, Unit Test, Service Test,

此篇來探討如何對Database做自動化測試.

由於Database為Android API 相關的測試, 需將測試檔案放於module-name/src/androidTest/java/ 路徑下.

(請參閱 Android App Test 基本概念)

Step 1: 產生測試檔

利用 Ctrl + Shift + T 建立 MainContentProviderTest.java

並繼承ProviderTestCase2

Step 2: 初始化

傳入要測試的Class檔, 以及Database權限

public MainContentProviderTest() {
    super(MainContentProvider.class, MainDbContract.AUTHORITY);
}

需與AndroidManifest.xml 中宣告的權限一致.

AndroidManifest.xml

<provider android:name=".database.MainContentProvider"
          android:authorities="com.projects.nick.database"
          android:exported="false" />

Step 3: 建立自動化測試

資料插入測試

@SmallTest
public void testInsert() {
    Uri uri = MainDbContract.getWarriorsUri();
    ContentValues values = new ContentValues();
    values.put(Warriors.COLUMN_NAME, "Thompson");
    values.put(Warriors.COLUMN_NUMBER, 11);
    // 插入後會產生一筆插入時的uri
    Uri resultingUri = getMockContentResolver().insert(uri, values); 
    //檢查此筆uri不為NUll
    assertNotNull(resultingUri); 
    //可根據此筆uri 查詢到在database的index
    long id = ContentUris.parseId(resultingUri);  
    //檢查此筆index 有值
    assertTrue(id > 0); 
}

刪除資料測試

@SmallTest
public void testDelete() {
    //先插入一筆資料
    testInsert();

    Uri uri = MainDbContract.getWarriorsUri();
    String selection = Warriors.COLUMN_NAME + "=?";
    String[] selections = new String[] {"Thompson"};
    //刪除資料, 並回傳刪除數量
    int count = getMockContentResolver().delete(uri, selection, selections);
    assertEquals(1, count);
}

Source Code

public class MainContentProviderTest extends ProviderTestCase2<MainContentProvider> {

    public MainContentProviderTest() {
        super(MainContentProvider.class, MainDbContract.AUTHORITY);
    }

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

    @SmallTest
    public void testInsert() {
        Uri uri = MainDbContract.getWarriorsUri();
        ContentValues values = new ContentValues();
        values.put(Warriors.COLUMN_NAME, "Thompson");
        values.put(Warriors.COLUMN_NUMBER, 11);
        Uri resultingUri = getMockContentResolver().insert(uri, values); // 插入後會產生一筆插入時的uri
        assertNotNull(resultingUri); //檢查此筆uri不為NUll
        long id = ContentUris.parseId(resultingUri);  //可根據此筆uri 查詢到在database的index
        assertTrue(id > 0); //檢查此筆index 有值
    }

    @SmallTest
    public void testDelete() {
        //先插入一筆資料
        testInsert();

        Uri uri = MainDbContract.getWarriorsUri();
        String selection = Warriors.COLUMN_NAME + "=?";
        String[] selections = new String[] {"Thompson"};
        //刪除資料, 並回傳刪除數量
        int count = getMockContentResolver().delete(uri, selection, selections);
        assertEquals(1, count);
    }
    
    @Override
    protected void tearDown() throws Exception {
        super.tearDown();
    }
}