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copied!<p>You could use a matcher (<a href="http://code.google.com/p/hamcrest" rel="nofollow noreferrer">http://code.google.com/p/hamcrest</a>) to check whether you get the correct arguments passed into your method. Note you'll need to statically import your matcher (HasCorrelationId in my example).</p> <p>The example below asserts that client.forwardMessage(m) is called once with a message with null correlationId and once with a message with correlationId="abc".</p> <pre><code>import org.hamcrest.Description; import org.hamcrest.TypeSafeMatcher; public class HasCorrelationId extends TypeSafeMatcher<Message> { private final Object expectedCorrelationId; public HasCorrelationId(Object expectedCorrelationId) { this.expectedCorrelationId = expectedCorrelationId; } @Override public boolean matchesSafely(Message message) { if (expectedCorrelationId==message.getCorrelationId()) return true; return expectedCorrelationId==null? false: expectedCorrelationId.equals(message.getCorrelationId()); } public void describeTo(Description description) { description.appendText("hasCorrelationId("+expectedCorrelationId+")"); } public static HasCorrelationId hasCorrelationId(Object correlationId) { return new HasCorrelationId(correlationId); } } </code></pre> <p>... and now for the test:</p> <pre><code>public class MyTest { private Mockery context = new Mockery(); @Test public void testCorrelationId() { final Client client = context.mock(Client.class); final Message message1 = context.mock(Message.class,"message1"); final Message message2 = context.mock(Message.class,"message2"); context.checking(new Expectations(){{ allowing(message1).getCorrelationId();will(returnValue(null)); allowing(message2).getCorrelationId();will(returnValue("abc")); one(client).forwardMessage(with(hasCorrelationId(null))); one(client).forwardMessage(with(hasCorrelationId("abc"))); }}); client.forwardMessage(message1); client.forwardMessage(message2); } } </code></pre>

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