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javagroovymockingspock

Groovy Mock the same Stream call more than one time

Has problem :

given:
someService.getSome(*_) >> Stream.of("A", "B")
when:
someService.getSomeMethod()
then:
noExceptionThrown()

Error: "stream has already been operated upon or closed"

in method "getSomeMethod()" few times are calling someService.getSome(*_) which has to return the same stream. Can somebody help with this case?

Solution

  • You don't want to return the same Stream, since you can only process each one once. Instead, return identical copies of the Stream:

    someService.getSome(*_) >> { Stream.of("A", "B") }

    (It's probably also a good idea to be more specific about your expected arguments rather than using *_.)