Java 模拟Guava CacheLoader回调方法
我一直试图模拟回调,但没有成功。 下面是一个示例代码:Java 模拟Guava CacheLoader回调方法,java,junit,mockito,guava,Java,Junit,Mockito,Guava,我一直试图模拟回调,但没有成功。 下面是一个示例代码: public class TestService { private UtilService utilService; private LoadingCache<String, String> cache= CacheBuilder.newBuilder() .build(new CacheLoader<String, String>() {
public class TestService {
private UtilService utilService;
private LoadingCache<String, String> cache= CacheBuilder.newBuilder()
.build(new CacheLoader<String, String>() {
public String load(String key) throws Exception {
System.out.println("key = " + key);
return getKey(key);
}
});
public String getkeyFromCache(String key) throws ExecutionException {
return cache.get(key);
}
@VisibleForTesting
public String getKey(String key) {
return utilService.getKey(key);
}
}
但它似乎没有被调用
Wanted but not invoked:
testService.getKey("Mykey");
-> at utils.TestServiceTest.testCache(TestServiceTest.java:38)
However, there were other interactions with this mock:
-> at utils.TestServiceTest.testCache(TestServiceTest.java:36)
-> at utils.TestServiceTest.testCache(TestServiceTest.java:37)
at utils.TestServiceTest.testCache(TestServiceTest.java:38)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.mockito.internal.runners.JUnit45AndHigherRunnerImpl.run(JUnit45AndHigherRunnerImpl.java:37)
at org.mockito.runners.MockitoJUnitRunner.run(MockitoJUnitRunner.java:62)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
我想测试缓存功能,但不是UtilService,所以我想模拟它。
我想不出在这个测试中使用Answer或Captor的方法,否则我会这样做。当在load()方法中调用getKey()方法时,它是在TestService类中调用的,而不是通过模拟代理。这就是为什么
doReturn(MYKEY).when(testService).getKey(MYKEY);
不起作用。但是,您可能也应该模拟UtilService,并看到它只被访问一次。您的问题是您自己创建了间谍。因此回调将绑定到实际方法。允许Mockito处理对象创建可以解决这个问题。(我正在使用mockito 1.10.19) 我已经重构了您的测试代码:
@RunWith(MockitoJUnitRunner.class)
public class TestServiceTest {
public static final String MYKEY = "Mykey";
@Spy
TestService testService;
@Test
public void testCache() throws ExecutionException {
doReturn(MYKEY).when(testService).getKey(MYKEY);
String result=testService.getkeyFromCache(MYKEY);
String result2nd=testService.getkeyFromCache(MYKEY);
verify(testService).getKey(MYKEY);
}
}
注意:当您使用Mockito运行程序时,您不需要自己初始化Mockito。时间(1)也是验证呼叫的默认值。Thank you@Admit。有两个问题。我使用的版本是1.9.5,服务的初始化。你告诉我你的mockito版本是件好事,否则我会继续寻找。是的,版本似乎是关键。我很高兴它能帮上忙。嘿,感谢您提供了测试的/when/then格式;)谢谢你的回答,但我承认你有更好的解决办法。另外,由于您是stackoverflow新手,请尽量回答问题,不要暗示代码是错误的,因为大多数情况下,我们不会发布实际代码,而是发布代码问题的示例。@zpontikas谢谢,明白了
@RunWith(MockitoJUnitRunner.class)
public class TestServiceTest {
public static final String MYKEY = "Mykey";
@Spy
TestService testService;
@Test
public void testCache() throws ExecutionException {
doReturn(MYKEY).when(testService).getKey(MYKEY);
String result=testService.getkeyFromCache(MYKEY);
String result2nd=testService.getkeyFromCache(MYKEY);
verify(testService).getKey(MYKEY);
}
}