Robolectric测试抛出RuntimeException:java.lang.ClassNotFoundException

我用Robolectric测试编写了简单的hello-world .

我已经添加到build.gradle正确的依赖项:

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

这是我的简单CartModel.java测试:

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);
    }
}

一旦我点击运行测试:

我遇到这个例外的测试失败:

java.lang.RuntimeException:java.lang.ClassNotFoundException:找不到包的类:和类名:com.android.tools.fd.runtime.BootstrapApplication at org.robolectric.DefaultTestLifecycle.createApplication(DefaultTestLifecycle.java:61) org.robolectric.DefaultTestLifecycle.createApplication(DefaultTestLifecycle.java:15)org.robolectric.internal.ParallelUniverse.setUpApplicationState(ParallelUniverse.java:102)org.robolectric.RobolectricTestRunner.setUpApplicationState(RobolectricTestRunner.java:433)at org. robolectric.RobolectricTestRunner $ 2.evaluate(RobolectricTestRunner.java:240)org.robolectric.RobolectricTestRunner.runChild(RobolectricTestRunner.java:188)org.robolectric.RobolectricTestRunner.runChild(RobolectricTestRunner.java:54)org.junit.runners. ParentRunner $ 3.run(ParentRunner.java:290)位于org.junit的org.junit.runners.ParentRunner $ 1.schedule(ParentRunner.java:71)org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) .runners.Pare ntRunner.access $ 000(ParentRunner.java:58)org.junit.runners.ParentRunner $ 2.evaluate(ParentRunner.java:268)atg.robolectric.RobolectricTestRunner $ 1.evaluate(RobolectricTestRunner.java:152)org.junit. runners.ParentRunner.run(ParentRunner.java:363)org.junit.runners.Suite.runChild(Suite.java:128)org.junit.runners.Suite.runChild(Suite.java:27)atg.junit .runners.ParentRunner $ 3.run(ParentRunner.java:290)org.junit.runners.ParentRunner $ 1.schedule(ParentRunner.java:71)at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)at在org.junit.runners.ParentRunner.run(ParentRunner.java: 363)在org.junit.runner.JUnitCore.run(JUnitCore.java:137)在com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:69)在com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart (JUnitStarter.java:234)在co m.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.在com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)的java.lang.reflect.Method.invoke(Method.java:606)中反映.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)引起:java.lang.ClassNotFoundException:找不到包的类:klogi.com.dummyapp和类名:com.android.tools.fd.runtime.BootstrapApplication at org.robolectric.internal.ClassNameResolver.resolve(ClassNameResolver. java:25)at org.robolectric.DefaultTestLifecycle.createApplication(DefaultTestLifecycle.java:59)... 30更多

我运行Android Studio 2.0 Preview 3b.

问题是:如何避免失败？

这非常奇怪,但我所要做的就是在Android Studio中禁用即时运行(首选项 - >构建,执行,部署 - >即时运行 - >启用即时运行 - 取消选中).

现在所有测试都在通过.