This is nitpicky but in Spock you want to have your declarations like:

given:
<assign your fields, mocks and stubs here>

when:
<call the method you're trying to test here>

then:
<do your asserts here>

or if you just want to do some simple asserts (like you're doing here) you can do:

given:
<assign your fields, mocks and stubs here>

expect:
<call the method you're trying to test here and do the asserts at the same time>

Also, the general rule for your where: block is:

where:
givenFieldX | givenFieldY || expectedResultZ

so the fields on the left of the || is what you feed into the method in your given: block and the fields on the right is what you verify in the then: or expect: blocks.

Here's an example of everything together:

        given:
        domain.requisition = new Requisition()
        domain.requisition.status = requisitionStatus

        expect:
        domain.displayStatus == requisitionItemStatus

        where:
        requisitionStatus                  || requisitionItemStatus
        RequisitionStatus.PENDING_APPROVAL || RequisitionItemStatus.PENDING
        ...

@alannadolny An afterthought. Is the above getStatus() still used? Seems like this one is adding two additional ifs at the top. Could we remove the other one and leave only this?

Btw GJ with tests.

(Or if we are afraid that we can break something here after the two new ifs we could just call the other method.)

@awalkowiak done