我正在为一个依赖于通过意图传递给它的额外内容的类编写一个android Junit测试。我能够让类正常工作,但我仍然想知道如何为这样的类编写单元测试,因为测试仍然失败。
public class AddClassEvent extends Activity{
private String eventType;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Bundle extras = getIntent().getExtras();
final String cNo = extras.getString("CourseNum");
// create a model instance
final StudentDBModel model = new StudentDBModel(this);
setContentView(R.layout.add_class_event);
.....
.....
}
}
测试类看起来像...
public class AddClassEventTest extends ActivityInstrumentationTestCase2<AddClassEvent>{
private StudentDBModel model = null;
private RenamingDelegatingContext context = null;
public AddClassEventTest() {
super("com.UI", AddClassEvent.class);
}
/**
* This method is called before each test.
*/
@Override
public void setUp() {
context = new RenamingDelegatingContext(getActivity(), "test_");
model = new StudentDBModel(context);
}
/*
* This function will test addNewClassEvent() from StudentDBModel
*/
public void testAddNewClassEvent(){
ContentValues courseValues = new ContentValues();
courseValues.put("CourseId", "60-415");
courseValues.put("CourseName", "Advanced Database Design");
courseValues.put("Section", "1");
courseValues.put("Location", "Erie");
courseValues.put("Credit", "3");
courseValues.put("ProfEmail", "rfortier@uwindsor.ca");
courseValues.put("Website", "cs.uwindsor.ca");
model.addNewCourses(courseValues);
int numEventsBefore = model.getNumClassEvents();
ContentValues values = new ContentValues();
values.put("EventName", "Assignment 1");
values.put("CourseId", "60-415");
values.put("EventType", "Assignment");
values.put("EventWeight", "8");
values.put("DueDate", "10/20/2010");
model.addNewClassEvent(values);
int numEventsAfter = model.getNumClassEvents();
assertEquals(numEventsBefore + 1, numEventsAfter);
}
}
问题是,我传递给AddClassEvent类的额外内容是在另一个类中创建并通过Intent传递给AddClassEvent的DB的PK。每当我运行测试时,我都会在行上得到一个空指针异常:
final String cNo = extras.getString("CourseNum");
如何从Junit Test中的额外信息中创建信息?有没有办法让这个测试起作用呢?我找了很久,也找不到答案。有没有办法在Junit测试中错误地创建额外的类,这样它就会认为它是由其他类创建的?如果是这样的话,有没有人可以教我怎么做?
好的,我试着采纳你的建议,并将我的setUp函数更改为:
@Override
public void setUp() {
context = new RenamingDelegatingContext(getActivity(), "test_");
model = new StudentDBModel(context);
Intent addEvent = new Intent();
addEvent.setClassName("com.UI", "com.UI.AddClassEvent");
addEvent.putExtra("CourseNum", "60-415");
setActivityIntent(addEvent);
getActivity();
}
但是我仍然得到一个空指针异常。我的语法是错的吗?有什么建议吗?
发布于 2010-12-02 06:26:56
好了,我发现了我的错误!setUp的代码只是顺序错误。它应该看起来像这样:
@Override
public void setUp() {
Intent addEvent = new Intent();
addEvent.setClassName("com.UI", "com.UI.AddClassEvent");
addEvent.putExtra("CourseNum", "60-415");
setActivityIntent(addEvent);
context = new RenamingDelegatingContext(getActivity(), "test_");
model = new StudentDBModel(context);
}
我调用了两次getActivity(),第一次调用在意图之前。通过使用正确的顺序,测试运行良好。谢谢你的帮助,McStretch。
https://stackoverflow.com/questions/4320099
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