Android的 - 爲測試代碼示例與ProviderTestCase2

Question

我在哪裏可以找到一個簡單，工作和容易的代碼示例在Android測試與ProviderTestCase2？

最佳將是一個開放源代碼項目中真正使用它 - 而另一方面，在實際項目的複雜性，可以成爲難以實現的實際功能，所以任何很好的例子是值得歡迎的。 Google Android文檔不是非常具體，不包含任何適當的示例。

Answer 1

Android在內部使用它來測試其提供者。有關示例，請參閱here和here。 Google Code Search很適合這個東西:)

Answer 2

在Android SDK記事本示例項目中有一個很好的例子。特別是NotePadProviderTest。只要確保你有通過SDK mamanger安裝的樣本，你就可以走了。

Answer 3

在這個例子中我測試一個命名爲「數據層」，存在於被測試的應用程序的ContentProvider;下面，我已經開始測試ContentProvider接口到一個名爲「ActiveUser」的表。

如果有人知道如何使用newResolverWithContentProviderFromSql 請賜教！

package com.example.android.app.test; 

import android.content.ContentUris; 
import android.content.ContentValues; 
import android.database.Cursor; 
import android.net.Uri; 
import android.provider.BaseColumns; 
import android.test.ProviderTestCase2; 
import android.test.mock.MockContentResolver; 
import android.util.Log; 

import com.example.android.app.Constants; 
import com.example.android.app.DataLayer; 
import com.example.android.app.provider.contract.ActiveUserContract; 

public class DataLayerTests extends ProviderTestCase2<DataLayer> { 

    private static final String TAG = DataLayerTests.class.getSimpleName(); 

    MockContentResolver mMockResolver; 

    public DataLayerTests() { 
     super(DataLayer.class, Constants.DATA_LAYER_AUTHORITY); 
    } 

    @Override 
    protected void setUp() throws Exception { 
     super.setUp(); 
     Log.d(TAG, "setUp: "); 
     mMockResolver = getMockContentResolver(); 
    } 

    @Override 
    protected void tearDown() throws Exception { 
     super.tearDown(); 
     Log.d(TAG, "tearDown:"); 
    } 

    public void testActiveUserInsert__inserts_a_valid_record() { 
     Uri uri = mMockResolver.insert(ActiveUserContract.CONTENT_URI, getFullActiveUserContentValues()); 
     assertEquals(1L, ContentUris.parseId(uri)); 
    } 

    public void testActiveUserInsert__cursor_contains_valid_data() { 
     mMockResolver.insert(ActiveUserContract.CONTENT_URI, getFullActiveUserContentValues()); 
     Cursor cursor = mMockResolver.query(ActiveUserContract.CONTENT_URI, null, null, new String[] {}, null); 
     assertNotNull(cursor); 
     assertEquals(1, cursor.getCount()); 
     assertTrue(cursor.moveToFirst()); 
     assertEquals(VALID_USERNAME,  cursor.getString(cursor.getColumnIndex(ActiveUserContract.Columns.USERNAME))); 
     assertEquals(VALID_COMPANY_CODE, cursor.getString(cursor.getColumnIndex(ActiveUserContract.Columns.COMPANY_CODE))); 
     assertEquals(VALID_COMPANY_LETTER, cursor.getString(cursor.getColumnIndex(ActiveUserContract.Columns.COMPANY_LETTER))); 
     assertEquals(VALID_DRIVER_CODE,  cursor.getString(cursor.getColumnIndex(ActiveUserContract.Columns.DRIVER_CODE))); 
     assertEquals(VALID_SITE_NUMBER,  cursor.getString(cursor.getColumnIndex(ActiveUserContract.Columns.SITE_NUMBER))); 
     assertEquals(VALID_FIRST_NAME,  cursor.getString(cursor.getColumnIndex(ActiveUserContract.Columns.FIRST_NAME))); 
     assertEquals(VALID_SURNAME,   cursor.getString(cursor.getColumnIndex(ActiveUserContract.Columns.SURNAME))); 
    } 

    public void testActiveUserInsert__throws_SQLiteConstraintException_when_NOT_NULL_constraint_not_met() { 
     try { 
      mMockResolver.insert(ActiveUserContract.CONTENT_URI, getActiveUserContentValuesWithNullCompanyCode()); 
      fail("SQLiteConstraintException should have been thrown!"); 
     } catch (SQLiteConstraintException e) { 
      assertEquals("active_user.comp_code may not be NULL (code 19)", e.getMessage()); 
     } 
    } 

    /** @return a ContentValues object with a value set for each ActiveUser column */ 
    public static ContentValues getFullActiveUserContentValues() { 
     ContentValues v = new ContentValues(7); 
     v.put(ActiveUserContract.Columns.USERNAME,  VALID_USERNAME); 
     v.put(ActiveUserContract.Columns.COMPANY_CODE, VALID_COMPANY_CODE); 
     v.put(ActiveUserContract.Columns.COMPANY_LETTER, VALID_COMPANY_LETTER); 
     v.put(ActiveUserContract.Columns.DRIVER_CODE, VALID_DRIVER_CODE); 
     v.put(ActiveUserContract.Columns.SITE_NUMBER, VALID_SITE_NUMBER); 
     v.put(ActiveUserContract.Columns.FIRST_NAME,  VALID_FIRST_NAME); 
     v.put(ActiveUserContract.Columns.SURNAME,  VALID_SURNAME); 
     return v; 
    } 

public static ContentValues getActiveUserContentValuesWithNullCompanyCode() { 
    ContentValues v = new ContentValues(7); 
    v.put(ActiveUserContract.Columns.USERNAME,  VALID_USERNAME); 
    v.putNull(ActiveUserContract.Columns.COMPANY_CODE); 
    v.put(ActiveUserContract.Columns.COMPANY_LETTER, VALID_COMPANY_LETTER); 
    v.put(ActiveUserContract.Columns.DRIVER_CODE, VALID_DRIVER_CODE); 
    v.put(ActiveUserContract.Columns.SITE_NUMBER, VALID_SITE_NUMBER); 
    v.put(ActiveUserContract.Columns.FIRST_NAME,  VALID_FIRST_NAME); 
    v.put(ActiveUserContract.Columns.SURNAME,  VALID_SURNAME); 
    return v; 
} 

    private static final String VALID_SURNAME  = "Brin"; 
    private static final String VALID_FIRST_NAME  = "Sergey"; 
    private static final String VALID_SITE_NUMBER = "9"; 
    private static final String VALID_DRIVER_CODE = "SergB201"; 
    private static final String VALID_COMPANY_LETTER = "G"; 
    private static final String VALID_COMPANY_CODE = "GOOGLE!"; 
    private static final String VALID_USERNAME  = "123456"; 
}