在InstrumentationTestCase中模拟

Question

我试图模拟我的仪器测试方法，但它失败了，我正在寻找一个解决方案来解决它。

public class MyTest extends InstrumentationTestCase {
    private Context mAppCtx;
    @Override
    public void setUp() throws Exception {
        super.setUp();
        Context context = mock(Context.class);
        mAppCtx = getInstrumentation().getContext().getApplicationContext();                
        when(mAppCtx.createPackageContext(PACKAGE_NAME, 0)).thenReturn(context);
    }

崩溃发生在以下行:

when(mAppCtx.createPackageContext(PACKAGE_NAME, 0)).thenReturn(context);

，我得到以下错误:

org.mockito.exceptions.misusing.MissingMethodInvocationException:
when() requires an argument which has to be 'a method call on a mock'.
For example:
when(mock.getArticles()).thenReturn(articles);
Also, this error might show up because:
1. you stub either of: final/private/equals()/hashCode() methods.
Those methods *cannot* be stubbed/verified.
2. inside when() you don't call method on mock but on some other object.
3. the parent of the mocked class is not public.
It is a limitation of the mock engine.

Answer 1

您需要模拟getInstrumentation().getContext().getApplicationContext();

的每个方法调用

的例子:

Instrumentation inst = mock(Instrumentation.class);
Context instContext = mock(Context.class);
ApplicationContext mAppCtx= mock(ApplicationContext.class);
when(getInstrumentation()).thenReturn(inst);
when(inst.getContext()).thenReturn(instContext);
when(instContext.getApplicationContext()).thenReturn(mAppCtx);
when(mAppCtx.createPackageContext(PACKAGE_NAME, 0)).thenReturn(context);