JUnit4

Question

我在 Espresso 中使用 AndroidJUnit运行ner。

我写了一个简单的测试，但总是收到这个异常。根据 Whosebug 的回答，问题是搞乱了 JUnit3 和 JUnit4，但我从未在我的项目中使用过 JUnit3。

junit.framework.AssertionFailedError: No tests found in com.walletsaver.app.test.espresso.SignUpPopupTest

package com.walletsaver.app.test.espresso;

import android.support.test.rule.ActivityTestRule;
import android.support.test.runner.AndroidJUnit4;
import android.test.suitebuilder.annotation.SmallTest;

import com.walletsaver.app.activity.LoginActivity;

import org.junit.Rule;
import org.junit.Test;
import org.junit.runner.RunWith;

import static android.support.test.espresso.Espresso.onView;
import static android.support.test.espresso.action.ViewActions.click;
import static android.support.test.espresso.matcher.ViewMatchers.withText;

@RunWith(AndroidJUnit4.class)
@SmallTest
public class SignUpPopupTest {

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

    @Test
    public void checkSignUpPopup() throws Exception {
        onView(withText("Sign Up")).perform(click());
    }
}

运行配置：

输出：

Answer 1

我发现了问题。它在主模块的 build.gradle 中遗漏了代码。如果您遇到此问题，我建议您先添加此行：

android {
    ...

    defaultConfig {
        ...

        testInstrumentationRunner 'android.support.test.runner.AndroidJUnitRunner'
    }
...
}

Answer 2

android {
    defaultConfig {
        testInstrumentationRunner 'android.support.test.runner.AndroidJUnitRunner'
    }
}

dependencies {
    androidTestImplementation "androidx.test:runner:1.4.0"
    androidTestImplementation "androidx.test.ext:junit:1.1.3"
}

@RunWith(AndroidJUnit4::class)
class SomeInstrumentedTest {}

JUnit4 - AssertionFailedError: No tests found

JUnit4 - AssertionFailedError: No tests found

testing

junit

android

android-espresso