Java 可变输出Mockito mocks
我有一个类Java 可变输出Mockito mocks,java,unit-testing,mocking,mockito,Java,Unit Testing,Mocking,Mockito,我有一个类WidgetProcessor,它依赖于另一个类FizzChecker: public class FizzChecker { public boolean hasMoreBuzz() { // Sometimes returns true, sometimes returns false. } } 这个hasMoreBuzz()方法是从WidgetProcessor内部调用的,如下所示: public class WidgetProcessor {
WidgetProcessor
,它依赖于另一个类FizzChecker
:
public class FizzChecker {
public boolean hasMoreBuzz() {
// Sometimes returns true, sometimes returns false.
}
}
这个hasMoreBuzz()
方法是从WidgetProcessor
内部调用的,如下所示:
public class WidgetProcessor {
public int process() {
while(fizzChecker.hasMoreBuzz()) {
// ... process stuff in here
}
}
}
我想为以下情况编写测试用例:
第一次调用时返回false(因此循环永远不会执行)fizzChecker.hasMoreBuzz()
在第五次调用时返回falsefizzChecker.hasMoreBuzz()
package com.ejk;
import org.junit.Test;
import org.mockito.invocation.InvocationOnMock;
import org.mockito.stubbing.Answer;
import static org.mockito.Mockito.when;
import static org.mockito.Mockito.mock;
public class SO {
@Test
public void testIt() {
IFoo mock = mock(IFoo.class);
MyAnswer myAnswer = new MyAnswer();
when(mock.doFoo()).then(myAnswer);
for (int i=1; i<10; i++) {
System.out.println(i+ ") " + mock.doFoo());
}
}
class MyAnswer implements Answer<Boolean> {
int counter = 1;
@Override
public Boolean answer(InvocationOnMock invocation) throws Throwable {
return (counter++ == 5) ? Boolean.FALSE : Boolean.TRUE;
}
}
interface IFoo {
boolean doFoo();
}
}
package com.ejk;
导入org.junit.Test;
导入org.mockito.invocation.invocationMock;
导入org.mockito.stubing.Answer;
导入静态org.mockito.mockito.when;
导入静态org.mockito.mockito.mock;
公开课{
@试验
public void testIt(){
IFoo mock=mock(IFoo.class);
MyAnswer MyAnswer=新的MyAnswer();
when(mock.doFoo())。然后(myAnswer);
对于(int i=1;i您可以。对stubbed方法的连续调用将按顺序返回操作,对所有调用重复最后的操作。示例:
// will return true four times, and then false for all calls afterwards
when(mockFizzChecker.hasMoreBuzz()).thenReturn(true, true, true, true, false);
when(mockFizzChecker.hasMoreBuzz())
.thenReturn(true)
.thenReturn(true)
.thenReturn(true)
.thenReturn(true)
.thenReturn(false);
// you can also switch actions like this:
when(someOtherMock.someMethodCall())
.thenReturn(1, 2)
.thenThrow(new RuntimeException());
您可能需要单独设置它们:
public class WidgetProcessorTest {
private WidgetProcessor processor;
private FizzChecker mockFizzChecker;
@Before public void setUp() {
processor = new WidgetProcessor();
mockFizzChecker = Mockito.mock(FizzChecker.class);
processor.setFizzChecker(mockFizzChecker);
}
@Test public void neverHasBuzz() {
when(mockFizzChecker.hasMoreBuzz()).thenReturn(false);
processor.process();
// asserts
}
@Test public void hasFiveBuzzes() {
when(mockFizzChecker.hasMoreBuzz())
.thenReturn(true, true, true, true, false);
processor.process();
// asserts
}
}
<>最后注意:在现实中,你可能发现你需要协调多个调用(比如<代码> HasMuuBuz 和<代码> GETNEXBUZZ)。如果它开始变得复杂,并且你可以预见在很多测试中写这个,考虑跳过Mokito,而只是.< /P>
public class WidgetProcessorTest {
private WidgetProcessor processor;
private FizzChecker mockFizzChecker;
@Before public void setUp() {
processor = new WidgetProcessor();
mockFizzChecker = Mockito.mock(FizzChecker.class);
processor.setFizzChecker(mockFizzChecker);
}
@Test public void neverHasBuzz() {
when(mockFizzChecker.hasMoreBuzz()).thenReturn(false);
processor.process();
// asserts
}
@Test public void hasFiveBuzzes() {
when(mockFizzChecker.hasMoreBuzz())
.thenReturn(true, true, true, true, false);
processor.process();
// asserts
}
}