在编写测试用例时,可以通过以下步骤来测试一个方法是否能够修改其输入并将其传递给模拟对象:
import org.junit.Assert;
import org.junit.Test;
import org.mockito.ArgumentCaptor;
import org.mockito.Mockito;
YourClass yourClassMock = Mockito.mock(YourClass.class);
Mockito.when(yourClassMock.yourMethod(Mockito.anyString())).thenAnswer(invocation -> {
String input = invocation.getArgument(0);
// 在这里修改输入
String modifiedInput = input + " modified";
return modifiedInput;
});
YourClass yourClass = new YourClass();
String input = "input";
ArgumentCaptor argumentCaptor = ArgumentCaptor.forClass(String.class);
yourClass.yourMethod(input);
Mockito.verify(yourClassMock).yourMethod(argumentCaptor.capture());
String capturedInput = argumentCaptor.getValue();
String expectedCapturedInput = input + " modified";
Assert.assertEquals(expectedCapturedInput, capturedInput);
完整的测试用例示例:
import org.junit.Assert;
import org.junit.Test;
import org.mockito.ArgumentCaptor;
import org.mockito.Mockito;
public class YourClassTest {
@Test
public void testYourMethod() {
YourClass yourClassMock = Mockito.mock(YourClass.class);
Mockito.when(yourClassMock.yourMethod(Mockito.anyString())).thenAnswer(invocation -> {
String input = invocation.getArgument(0);
// 在这里修改输入
String modifiedInput = input + " modified";
return modifiedInput;
});
YourClass yourClass = new YourClass();
String input = "input";
ArgumentCaptor argumentCaptor = ArgumentCaptor.forClass(String.class);
yourClass.yourMethod(input);
Mockito.verify(yourClassMock).yourMethod(argumentCaptor.capture());
String capturedInput = argumentCaptor.getValue();
String expectedCapturedInput = input + " modified";
Assert.assertEquals(expectedCapturedInput, capturedInput);
}
}
在这个示例中,我们通过使用Mockito来创建和设置模拟对象的行为。然后,我们创建了一个被测试的类实例,并调用了其方法。通过使用ArgumentCaptor来捕获传递给模拟对象的输入参数,然后断言捕获的输入参数是否被修改并传递给了模拟对象。这样,我们就可以测试方法是否能够修改其输入并将其传递给模拟对象。