Robolectric 测试抛出 RuntimeException：java.lang.ClassNotFoundException

Question

我用 Robolectric 测试写了简单的 hello-world。

我已经添加到 build.gradle 适当的依赖项：

testCompile 'junit:junit:4.12'
testCompile "org.robolectric:robolectric:3.0"

这是我要测试的简单CartModel.java：

public class CartModel {
    public float totalAmount;
    public int products;

    public void addToCart(float productPrice) {
        products++;
        totalAmount += productPrice;
    }
}

CartModelTest.java

@RunWith(RobolectricGradleTestRunner.class)
@Config(constants = BuildConfig.class, sdk=21)
public class CartModelTest {

    @Test
    public void addToCart() throws Exception {
        CartModel cartModel = new CartModel();
        assertEquals(0, cartModel.totalAmount, 0);
        assertEquals(0, cartModel.products);
        cartModel.addToCart(10.2f);
        assertEquals(10.2f, cartModel.totalAmount, 0);
        assertEquals(1, cartModel.products);
    }
}

单击运行测试后：

我遇到了一个测试失败的异常：

java.lang.RuntimeException: java.lang.ClassNotFoundException: Could not find a class for package: and class name: com.android.tools.fd.runtime.BootstrapApplication at org.robolectric.DefaultTestLifecycle.createApplication(DefaultTestLifecycle.java:61) at org.robolectric.DefaultTestLifecycle.createApplication(DefaultTestLifecycle.java:15) at org.robolectric.internal.ParallelUniverse.setUpApplicationState(ParallelUniverse.java:102) at org.robolectric.RobolectricTestRunner.setUpApplicationState(RobolectricTestRunner.java:433) at org.robolectric.RobolectricTestRunner.evaluate(RobolectricTestRunner.java:240) at org.robolectric.RobolectricTestRunner.runChild(RobolectricTestRunner.java:188) at org.robolectric.RobolectricTestRunner.runChild(RobolectricTestRunner.java:54) at org.junit.runners.ParentRunner.run(ParentRunner.java:290) at org.junit.runners.ParentRunner.schedule(ParentRunner.java:71) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) at org.junit.runners.ParentRunner.access[=17=]0(ParentRunner.java:58) at org.junit.runners.ParentRunner.evaluate(ParentRunner.java:268) at org.robolectric.RobolectricTestRunner.evaluate(RobolectricTestRunner.java:152) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) at org.junit.runners.Suite.runChild(Suite.java:128) at org.junit.runners.Suite.runChild(Suite.java:27) at org.junit.runners.ParentRunner.run(ParentRunner.java:290) at org.junit.runners.ParentRunner.schedule(ParentRunner.java:71) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) at org.junit.runners.ParentRunner.access[=17=]0(ParentRunner.java:58) at org.junit.runners.ParentRunner.evaluate(ParentRunner.java:268) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) at org.junit.runner.JUnitCore.run(JUnitCore.java:137) at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:69) at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:234) at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:74) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:606) at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144) Caused by: java.lang.ClassNotFoundException: Could not find a class for package: klogi.com.dummyapp and class name: com.android.tools.fd.runtime.BootstrapApplication at org.robolectric.internal.ClassNameResolver.resolve(ClassNameResolver.java:25) at org.robolectric.DefaultTestLifecycle.createApplication(DefaultTestLifecycle.java:59) ... 30 more

我运行 Android Studio 2.0 预览版 3b.

问题是：如何避免失败？

Answer 1

这很奇怪，但我所要做的就是 禁用即时运行（首选项 -> 构建、执行、部署 -> 即时运行 -> 在 Android Studio 中启用 Instant 运行 - 取消选中）。

现在所有测试都通过了。

Robolectric 测试抛出 RuntimeException：java.lang.ClassNotFoundException

Robolectric tests throw RuntimeException: java.lang.ClassNotFoundException

java

android

unit-testing

robolectric

android-studio