How to capture variable parameters with Mockito?

Question

There is a method which has variable parameters:

class A {     public void setNames(String... names) {} } 

Now I want to mock it with mockito, and capture the names passed to it. But I can't find a way to capture any number of names passed, I can only get them like this:

ArgumentCaptor<String> captor1 = ArgumentCaptor.fromClass(String.class); ArgumentCaptor<String> captor2 = ArgumentCaptor.fromClass(String.class);  A mock = Mockito.mock(A.class); mock.setNames("Jeff", "Mike"); Mockito.verity(mock).setNames(captor1.capture(), captor2.capture()); String name1 = captor1.getValue(); // Jeff String name2 = captor2.getValue(); // Mike 

If I pass three names, it won't work, and I have to define a captor3 to capture the 3rd name.

How to fix it?

Answer 1

Mockito 1.10.5 has introduced this feature.

For the code sample in the question, here is one way to capture the varargs:

    ArgumentCaptor<String> varArgs = ArgumentCaptor.forClass(String.class);     A mock = Mockito.mock(A.class);     mock.setNames("Jeff", "Mike", "John");     Mockito.verify(mock).setNames(varArgs.capture());      //Results may be validated thus:     List<String> expected = Arrays.asList("Jeff", "Mike", "John");     assertEquals(expected, varArgs.getAllValues()); 

Please see the ArgumentCaptor javadoc for details.

Answer 2

As of today (7 Nov 2013) it appears to be addressed, but unreleased, with a bit of additional work needed. See the groups thread and issue tracker for details.