unit testing - Java Hamcrest : Collection contains item of type -

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i'd assert list<achievement> contains member of type testachievement.

here's assertion:

list<achievement> achievements; // populated elsewhere assertthat(achievements,hasitem(isa(testachievement.class)));

this doesn't compile, reporting error:

the method assertthat(t, matcher) in type assert not applicable arguments (list, matcher<iterable<testachievement>>)

what's correct syntax type of assertion using hamcrest?

thanks help.

the posts here suggested defect hamcrest, headed on hacmrest site register bug, whien discovered mvn / ivy dependency declaration using out-of-date, giving me old version of hamcrest.

this bug exists 1.1, latest if declared using 

<dependency org="org.hamcrest" name="hamcrest-all" rev="1.1">

however, correct depedency declaration is:

<dependency org="org.hamcrest" name="hamcrest-library" rev="1.3.rc2"/>

updating solved issue. syntax used in test is:

 assertthat(achievements, hasitem(isa(testachievement.class)));

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