在JMock中捕获参数的标准方法

Question

在JMock中是否有一种已经内置的标准方法来捕获方法参数,以便稍后使用标准JUnit功能测试参数对象？

就像是

final CapturedContainer<SimpleMailMessage>capturedArgumentContainer = new ...
context.checking(new Expectations() {{
    oneOf(emailService.getJavaMailSender()).send(
       with(captureTo(capturedArgumentContainer)));
}});

assertEquals("helloWorld", capturedArgumentContainer.getItem().getBody());

CapturedContainer并且captureTo不存在 - 它们就是我要求的.

或者我需要自己实现这个？

Answer 1

您可以通过实现一个新的匹配器来执行此操作,该匹配器在调用匹配时捕获参数.这可以在以后检索.

class CapturingMatcher<T> extends BaseMatcher<T> {

  private final Matcher<T> baseMatcher;

  private Object capturedArg;

  public CapturingMatcher(Matcher<T> baseMatcher){
    this.baseMatcher = baseMatcher;
  }

  public Object getCapturedArgument(){
    return capturedArg;
  }

  public boolean matches(Object arg){
    capturedArg = arg;
    return baseMatcher.matches(arg);
  }

  public void describeTo(Description arg){
    baseMatcher.describeTo(arg);
  }
}

然后,您可以在设定期望时使用此功能.

final CapturingMatcher<ComplexObject> captureMatcher 
  = new CapturingMatcher<ComplexObject>(Expectations.any(ComplexObject.class));

mockery.checking(new Expectations() {{
      one(complexObjectUser).registerComplexity(with(captureMatcher));
}});

service.setComplexUser(complexObjectUser);

ComplexObject co = 
  (ComplexObject)captureMatcher.getCapturedArgument();

co.goGo();

Answer 2

我想你在这里忽略了一点.我们的想法是在期望中指定应该发生什么,而不是捕获它并在以后检查.那看起来像是:

context.checking(new Expectations() {{
    oneOf(emailService.getJavaMailSender()).send("hello world");
}});

或者,对于更宽松的条件,

context.checking(new Expectations() {{
    oneOf(emailService.getJavaMailSender()).send(with(startsWith("hello world")));
}});