[英]AssertionFailedError: <class> has no public constructor
I am working with Android Studio and I need to add a unit tests to my project. 我正在使用Android Studio,我需要为我的项目添加单元测试。
I read various tutorials, but nothing hepled me. 我阅读了各种教程,但没有什么能让我理解。
My problem is: 我的问题是:
TestXMLParser.java: TestXMLParser.java:
public class TestXMLParser extends ActivityInstrumentationTestCase2<HomePageActivity> {
public TestXMLParser(Class<HomePageActivity> activityClass) {
super(activityClass);
}
@Override
public void setUp() throws Exception {
super.setUp();
//Controller.init((Activity)getContext());
}
@Override
public void tearDown() throws Exception {
super.tearDown();
}
public void testTrue() throws Exception {
assertTrue(true);
}
...
}
When I run it, I see this message: 当我运行它时,我看到这个消息:
junit.framework.AssertionFailedError: Class cz.cvut.kosapp.jUnitTests.TestXMLParser has no public constructor TestCase(String name) or TestCase()
at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:190)
at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:175)
at android.test.InstrumentationTestRunner.onStart(InstrumentationTestRunner.java:555)
at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1661)
I really do not know why. 我真的不知道为什么。 Other jUnit tests works well, for example when I use: 其他jUnit测试运行良好,例如我使用时:
public class TestXMLParser extends AndroidTestCase { ...
in header, this works and tests are running correctly. 在标题中,这项工作和测试正确运行。
But I need use the Context (as a Activity) to run other code (in Controller class). 但我需要使用Context(作为Activity)来运行其他代码(在Controller类中)。
Do you have any idea how fix it? 你知道如何解决这个问题吗?
Thank you for your comments. 谢谢您的意见。
You need to add either a default constructor or a constructor which takes a String
as a parameter. 您需要添加默认构造函数或将String
作为参数的构造函数。 Adding the following default constructor with a call to the base class constructor should work: 通过调用基类构造函数添加以下默认构造函数应该有效:
public TestXMLParser() {
super(HomePageActivity.class);
}
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