ActivityUnitTestCase vs PreferenceScreen

Question

我有一個新創建的android-18應用程序，其中PreferenceScreen太明顯了，&很簡單。

而且我還有一個自動化測試[固定將問題轉換爲答案]。

public class MyPreferenceTest extends ActivityUnitTestCase<MyPreference> { 
    Intent intent; 
    MyPreference activity; 

    public MyPreferenceTest() { 
     super(MyPreference.class); 
    } 

    @Override 
    protected void setUp() throws Exception { 
     Context targetContext = getInstrumentation().getTargetContext(); 
     intent = new Intent(targetContext, MyPreference.class); 
     super.setUp(); 
    } 

    private void assembleActivity() { 
     startActivity(intent, null, null); 
     activity = getActivity(); 
    } 

    private void assemblePreferences(String device, String userName, String password) { 
     Context targetContext = getInstrumentation().getTargetContext();   
     SharedPreferences sharedPref = PreferenceManager.getDefaultSharedPreferences(targetContext); 
     SharedPreferences.Editor editor = sharedPref.edit(); 

     editor.putString("smart_phin_bluetooth_devices", device); 
     editor.putString("username", userName); 
     editor.putString("password", password); 
     editor.commit(); 
    } 

    public void test_empty_userNames_dont_reflect_into_the_summary() { 
     assemblePreferences("", "", ""); 
     assembleActivity(); 
     activity.onResume(); 
     EditTextPreference userName = (EditTextPreference) activity.findPreference("username"); // FIXME userName 
     assertEquals("", userName.getEditText().getText().toString()); 
     assertEquals("", userName.getText()); 
     assertEquals("Enter your user name", userName.getSummary().toString()); 
    } 

    public void test_full_userNames_reflect_into_the_summary() { 
     assemblePreferences("", "BookerT", ""); 
     assembleActivity(); 

     activity.onResume(); // We must call this bc Android does but the test rig does not... 
     EditTextPreference userName = (EditTextPreference) activity.findPreference("username"); 
     assertEquals("username", userName.getKey()); 

     assertEquals("BookerT", String.valueOf(userName.getText().toString()); 
//  assertEquals("BookerT", userName.getEditText().getText().toString()); 
     assertEquals("BookerT", userName.getSummary().toString()); 
    } 

} // end of class MyPreferenceTest 

註釋斷言會失敗，因爲沒有任何內容調用該EditText視圖。

測試現在檢查onResume（）中的新代碼是否更新來自通用語言的摘要以反映首選項的當前值。

Answer 1

你在測試中有一個錯誤。

private void assemblePreferences(String device, String userName, String password) 

注意，值的順序這裏是device，userName，password。

assemblePreferences("BookerT", "", ""); 

因此device是BookerT，不userName。