请帮助。我被卡住了。有人会告诉我为什么我在JUnit测试中有AssertionFailedError。我不知道为什么SQLiteDatabase db insert方法返回-1。
错误指向第50行：assertTrue（locationRowId！= -1）;
public void testInsertReadDb() {
// Test data we're going to insert into the DB to see if it works.
String testLocationSetting = "99705";
String testCityName = "North Pole";
double testLatitude = 64.7488;
double testLongitude = -147.353;
// If there's an error in those massive SQL table creation Strings,
// errors will be thrown here when you try to get a writable database.
WeatherDbHelper dbHelper = new WeatherDbHelper(mContext);
SQLiteDatabase db = dbHelper.getWritableDatabase();
// Create a new map of values, where column names are the keys
ContentValues values = new ContentValues();
values.put(LocationEntry.COLUMN_LOCATION_SETTING, testLocationSetting);
values.put(LocationEntry.COLUMN_CITY_NAME, testCityName);
values.put(LocationEntry.COLUMN_COORD_LAT, testLatitude);
values.put(LocationEntry.COLUMN_COORD_LONG, testLongitude);
//long locationRowId;
long locationRowId = db.insert(LocationEntry.TABLE_NAME, null, values);
// Verify we got a row back.
assertTrue(locationRowId != -1);
Log.d(LOG_TAG, "New row id: " + locationRowId);
这是错误：
Running tests
Test running started
junit.framework.AssertionFailedError
at com.example.krisemmanuel.sunshine.test.TestDb.testInsertReadDb(TestDb.java:50)
at java.lang.reflect.Method.invokeNative(Native Method)
at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:191)
at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:176)
at android.test.InstrumentationTestRunner.onStart(InstrumentationTestRunner.java:554)
at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1729)
Finish
这是一个错误的屏幕： http://picpaste.com/debughelpplease-IuEAYaNu.png
Android Studio项目文件夹： http://krisg.net/java/Sunshine.rar
我不知道为什么SQLiteDatabase db的insert（）方法返回-1。我试图测试插入到SQLite是否有效，但它在测试时失败。
