我尝试在android studio上的阳光应用程序上对DBTest进行不同测试时出错。我不知道发生了什么。
以下是错误消息
junit.framework.AssertionFailedError
at com.example.juandavid.sunshine.data.TestDb.insertLocation(TestDb.java:196)
at com.example.juandavid.sunshine.data.TestDb.testLocationTable(TestDb.java:117)
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$InstrumentationThread.run(Instrumentation.java:1729)
junit.framework.AssertionFailedError
at com.example.juandavid.sunshine.data.TestDb.insertLocation(TestDb.java:196)
at com.example.juandavid.sunshine.data.TestDb.testWeatherTable(TestDb.java:130)
at java.lang.reflect.Method.invokeNative(Native Method)
at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:191)
at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:176)
at android.test.InstrumentationTestRunner.onStart(InstrumentationTestRunner.java:554)
at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1729)
我正在学习，这对我来说是一种新的错误，因为我也在尝试同时学习表格，数据库和测试。
以下是代码：
package com.example.juandavid.sunshine.data;
import android.content.ContentValues;
import android.database.Cursor;
import android.database.sqlite.SQLiteDatabase;
import android.test.AndroidTestCase;
public class TestDb extends AndroidTestCase {
public static final String LOG_TAG = TestDb.class.getSimpleName();
// Since we want each test to start with a clean slate
void deleteTheDatabase() {
mContext.deleteDatabase(WeatherDbHelper.DATABASE_NAME);
}
/*
This function gets called before each test is executed to delete the database. This makes
sure that we always have a clean test.
*/
public void setUp() {
deleteTheDatabase();
}
public void testLocationTable() {
// First step: Get reference to writable databas
//line 117 com.example.juandavid.sunshine.data.TestDb.testLocationTable
insertLocation();
}
public void testWeatherTable() {
// First insert the location, and then use the locationRowId to insert
// the weather. Make sure to cover as many failure cases as you can.
deleteTheDatabase();
//line 130 com.example.juandavid.sunshine.data.TestDb.testWeatherTable error when inserLocation called
long locationRowId = insertLocation();
assertFalse("Error: Location Not Inserted Correctly", locationRowId == -1L);
// Instead of rewriting all of the code we've already written in testLocationTable
// we can move this code to insertLocation and then call insertLocation from both
// tests. Why move it? We need the code to return the ID of the inserted location
// and our testLocationTable can only return void because it's a test.
// First step: Get reference to writable database
WeatherDbHelper dbHelper= new WeatherDbHelper(mContext);
SQLiteDatabase db =dbHelper.getWritableDatabase();
// Create ContentValues of what you want to insert
// (you can use the createWeatherValues TestUtilities function if you wish)
ContentValues weatherValues = TestUtilities.createWeatherValues(locationRowId);
// Insert ContentValues into database and get a row ID back
long weatherRowId = db.insert(WeatherContract.WeatherEntry.TABLE_NAME, null, weatherValues);
assertTrue(weatherRowId != -1);
// Query the database and receive a Cursor back
Cursor weatherCursor = db.query(
WeatherContract.WeatherEntry.TABLE_NAME, // Table to Query
null, // leaving "columns" null just returns all the columns.
null, // cols for "where" clause
null, // values for "where" clause
null, // columns to group by
null, // columns to filter by row groups
null // sort order
);
// Move the cursor to a valid database row
assertTrue("Error: No records returned from location query", weatherCursor.moveToFirst()); // No se econtro nada
// Validate data in resulting Cursor with the original ContentValues
// (you can use the validateCurrentRecord function in TestUtilities to validate the
// query if you like)
TestUtilities.validateCurrentRecord("testInsertReadDb weatherEntry failed to validate",
weatherCursor, weatherValues);
assertFalse( "Error: More than one record returned from weather query",
weatherCursor.moveToNext() );
// Finally, close the cursor and database
weatherCursor.close();
dbHelper.close();
}
public long insertLocation() {
WeatherDbHelper dbHelper = new WeatherDbHelper(mContext);
SQLiteDatabase db = dbHelper.getWritableDatabase();
// Second Step: Create ContentValues of what you want to insert
// (you can use the createNorthPoleLocationValues if you wish)
ContentValues testValues = TestUtilities.createNorthPoleLocationValues();
// Third Step: Insert ContentValues into database and get a row ID back
long locationRowId;
//Line 196 com.example.juandavid.sunshine.data.TestDb.insertLocation(TestDb.java:196)
locationRowId = db.insert(WeatherContract.LocationEntry.TABLE_NAME, null, testValues);
// Verify we got a row back.
assertTrue(locationRowId != -1);
// Data's inserted. IN THEORY. Now pull some out to stare at it and verify it made
// the round trip.
// Fourth Step: Query the database and receive a Cursor back
// A cursor is your primary interface to the query results.
Cursor cursor = db.query(
WeatherContract.LocationEntry.TABLE_NAME, // Table to Query
null, // all columns
null, // Columns for the "where" clause
null, // Values for the "where" clause
null, // columns to group by
null, // columns to filter by row groups
null // sort order
);
// Move the cursor to a valid database row and check to see if we got any records back
// from the query
assertTrue( "Error: No Records returned from location query", cursor.moveToFirst() );
// Fifth Step: Validate data in resulting Cursor with the original ContentValues
// (you can use the validateCurrentRecord function in TestUtilities to validate the
// query if you like)
TestUtilities.validateCurrentRecord("Error: Location Query Validation Failed",
cursor, testValues);
// Move the cursor to demonstrate that there is only one record in the database
assertFalse( "Error: More than one record returned from location query",
cursor.moveToNext() );
// Sixth Step: Close Cursor and Database
cursor.close();
db.close();
return locationRowId;
}
}
测试函数insertLocation（）不会生成该错误，并且由testLocationTable调用，然后再由testWeatherTable调用。
期待您的回复。
此致 涓