我刚刚开始junit和我遇到的第一个问题是,我应该如何测试片段？
正在测试的活动有1个片段,这是主要的布局.
@Override
protected void setUp() throws Exception {
super.setUp();
Intent intent = new Intent(getInstrumentation().getTargetContext(),
ActivityWelcome.class);
startActivity(intent, null, null);
FragmentManager fragmentManager = getActivity().getSupportFragmentManager();
mFragmentWelcome = (FragmentWelcome) fragmentManager.findFragmentByTag(FragmentWelcome.TAG);
if (mFragmentWelcome == null) {
mFragmentWelcome= FragmentWelcome.newInstance();
fragmentManager
.beginTransaction()
.replace(android.R.id.content, mFragmentWelcome, FragmentWelcome.TAG)
.commit();
}
}
然后我继续测试布局:
@SmallTest
public void testLayout() {
ImageButton buttonImage = (ImageButton) getActivity().findViewById(my.package.R.id.button_invites);
assertNotNull(buttonImage);
assertEquals("ImageButton Invite has an invalid drawable"
, getActivity().getResources().getDrawable(my.package.R.drawable.light_social_invite)
, buttonImage);
}
错误:
java.lang.NullPointerException
at my.package.test.ActivityWelcomeUnitTest.testLayout(ActivityWelcomeUnitTest.java:55)
at java.lang.reflect.Method.invokeNative(Native Method)
at android.test.InstrumentationTestCase.runMethod(InstrumentationTestCase.java:214)
at android.test.InstrumentationTestCase.runTest(InstrumentationTestCase.java:199)
at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:169) …我正在尝试测试两个不同的Activity类,其中一个Activity碰巧调用另一个.这是我的代码,然后我会解释这个问题:
IntroActivityTest
public class IntroActivityTest extends ActivityInstrumentationTestCase2<IntroActivity> {
IntroActivity activity;
public IntroActivityTest() {
super( IntroActivity.class );
}
@Override
protected void setUp() throws Exception {
super.setUp();
activity = getActivity();
}
public void testIntroBypass() {
if ( new SharedPreferencesHelper( getInstrumentation().getTargetContext() ).retrieveUserToken() == null ) {
assertTrue( !activity.isFinishing() );
}
else {
assertTrue( activity.isFinishing() );
}
}
}
RootActivityTest:
public class RootActivityTest extends ActivityInstrumentationTestCase2<RootActivity> {
RootActivity activity;
public RootActivityTest() {
super( RootActivity.class );
}
@Override
protected void setUp() throws …我的Android应用程序上的MainActivity检查用户是否已登录(这是存储在SharedPreferences中),以及用户是否未登录LoginActivity.我试图使用以下代码测试它
public class MainActivityTest extends ActivityInstrumentationTestCase2<MainActivity> {
private static final int TIME_OUT = 5000; /* miliseconds */
private MainActivity mMainActivity;
private Instrumentation mInstrumentation;
private SharedPreferences mLoginPrefs;
public MainActivityTest() {
super(MainActivity.class);
}
protected void setUp() throws Exception {
super.setUp();
setActivityInitialTouchMode(false);
mMainActivity = getActivity();
mInstrumentation = getInstrumentation();
mLoginPrefs = mInstrumentation.getTargetContext().getSharedPreferences(LoginActivity.PREFS_NAME, Context.MODE_PRIVATE);
SharedPreferences.Editor editor = mLoginPrefs.edit();
// User is not logged in, so it should be redirect to LoginActivity
editor.putBoolean("logged_in", false);
editor.commit();
}
//...
public void testC_OpenLoginActivityIfUserIsNotLoggedIn() {
ActivityMonitor monitor = mInstrumentation.addMonitor(LoginActivity.class.getName(), null, …