How to negate an ArgumentMatcher

[Eric J. Van der Velden]

I create an ArgumentMatcher,

 private class IsListOf2Elements implements ArgumentMatcher<List<String>>{
 @Override
 public boolean matches(List<String> argument) {
 return ((List<String>)argument).size()==2;
 }
 }

Then I try to use it,

 Mockito.doReturn(false).when(mock).addAll(Mockito.argThat(AdditionalMatchers.not(new IsListOf2Elements())));

But I get an error,

org.mockito.exceptions.misusing.InvalidUseOfMatchersException:
No matchers found for additional matcher Not(?)
-> at my.test.own.Mockito_aTest.test4e(Mockito_aTest.java:136)

[Brice Dutheil]

Because the mockito `AdditionalMatchers.not` cannot be used like that, not to be mixed with the hamcrest one.

Using mockito that would be instead `addAll(AdditionalMatchers.not(Mockito.argThat(new IsListOfTwoElements())`.

-- Brice

Replied on a mobile device. May not compile.

_____________________________
From: Eric J. Van der Velden <ericjvan...@gmail.com>
Sent: Tuesday, October 25, 2016 14:02
Subject: [mockito] How to negate an ArgumentMatcher
To: mockito <moc...@googlegroups.com>

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