如何获取单元测试的上下文

Question

我正在尝试将上下文传递到构造函数中以进行单元测试。我收到以下错误

java.lang.IllegalStateException: No instrumentation registered! Must run under a registering instrumentation.

我试过下面的代码。

public class Handler {

    @Mock
    MyViewModel viewModel;

    @Before
    public void setup() {
        Context context = InstrumentationRegistry.getInstrumentation().getContext();
        Handler = new Handler(context, viewModel);

    }
}

Answer 1

Add @RunWith annotation with AndroidJUnit runner.

@RunWith(AndroidJunit4::class)
public class Handler {

    @Mock
    MyViewModel viewModel;

    @Before
    public void setup() {
        Context context = InstrumentationRegistry.getInstrumentation().getContext();
        Handler = new Handler(context, viewModel);

    }
}

如果 build.gradle(app)

中没有添加下面的依赖，还要添加

androidTestImplementation 'androidx.test.ext:junit:1.0.0'

如何获取单元测试的上下文

How to get Context for Unit Test

java

android

android-testing