Question

当我尝试运行SignUpFragmentTest类时，收到错误消息“未注册任何工具！必须在注册的工具下运行”。我认为使用@Rule会引发该错误。

import android.support.test.runner.AndroidJUnit4;
import android.support.v4.app.Fragment;
import android.widget.FrameLayout;



import org.junit.After;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import org.junit.runner.RunWith;
import androidx.test.rule.ActivityTestRule;
import static junit.framework.Assert.assertNotNull;



@RunWith(AndroidJUnit4.class)

public class SignUpFragmentTest {

    @Rule public final ActivityTestRule<LoginActivity> main = new ActivityTestRule<>(LoginActivity.class);

    private LoginActivity mActivity = null;



    @Before
    public void setUp() throws Exception {
    mActivity =main.getActivity();
    }
    @Test
    public void testLaunchSingUpScreen(){
        FrameLayout frameLayout = mActivity.findViewById(R.id.fragment_container);
        assertNotNull(frameLayout);
        Fragment fragment = new SignUpFragment();
        mActivity.getSupportFragmentManager().beginTransaction().add(frameLayout.getId(),fragment).commitAllowingStateLoss();

    }
    @After
    public void tearDown() throws Exception {
        mActivity= null;
    }
}

我添加到依赖项：

androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.1'
    androidTestImplementation 'androidx.test:runner:1.1.1'
    androidTestImplementation 'androidx.test:rules:1.1.1'

和

testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

到defaultConfig

Answer 1

对我有用的是将所有库完全从原来改回

androidX

到

com.android.support

build.gradle中的库

请注意：您可能必须重新导入库以测试您的课程，例如

import androidx.test.runner.AndroidJUnitRunner;

到

import android.support.test.runner.AndroidJUnitRunner;

还要确保在每次从build.gradle添加或删除库之后，始终清理并重建项目。

我收到错误消息“未注册任何仪器！必须在注册的仪器下运行”

1 个答案: