在哪里可以找到使用 ProviderTestCase2 在 Android 上进行测试的简单易用的代码示例？

最好是一个真正使用它的开源项目——另一方面，在一个真正的项目的复杂性中，它可能变得很难实现实际的功能，所以欢迎任何好的例子。 Google Android 文档不是很具体，也没有包含适当的示例。

最佳答案

在这个例子中，我正在测试一个名为“DataLayer”的 ContentProvider，它存在于被测试的应用程序中；下面，我开始测试 ContentProvider 接口(interface)到一个名为“ActiveUser”的表。

如果有人知道如何使用 newResolverWithContentProviderFromSql 请赐教!

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";
}

关于Android - 使用 ProviderTestCase2 进行测试的代码示例，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/5286876/