Expectations on named parameters not wrapped with Map literal give compilation error

Originally reported on Google Code with ID 358

Mocked collaborator. Expectation set on a method with named parameters. Named parameters
must be wrapped with Map literal (although not required by Groovy). If not, compilation
error occurs.

Doesn't work:
1 * collaborator.method(param1: 1, param2: 2)

Compilation error compiling [unit] tests: unknown kind of argument list: org.codehaus.groovy.ast.expr.TupleExpression@1066d85f[org.codehaus.groovy.ast.expr.NamedArgumentListExpression@50074d62[org.codehaus.groovy.ast.expr.MapEntryExpression@f6985fa(key:
ConstantExpression[param1], value: ConstantExpression[1]), org.codehaus.groovy.ast.expr.MapEntryExpression@58dae7fd(key:
ConstantExpression[param2], value: ConstantExpression[2])]] (Use --stacktrace to see
the full trace)

Works:
1 * collaborator.method([param1: 1, param2: 2])

Please see the attached test case for the full source code.

Reported by mgryszko on 2014-04-07 14:14:22

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- _Attachment: [ExpectationsOnNamedParametersSpec.groovy](https://storage.googleapis.com/google-code-attachments/spock/issue-358/comment-0/ExpectationsOnNamedParametersSpec.groovy)_

Start with the attached ExpectationsOnNamedParametersSpec.groovy test case and reproduce the compilation error for unwrapped named parameters. Trace the expectation argument handling from that failing example; done means the unwrapped syntax compiles and behaves like the Map-wrapped form.