ostream parameter to tests

[Ben Clifford]

The C tests assume that you can declare:

function () test()

or

function () test(ostream o)

depending on the needs of the test. This is OK in C. But the differing
type signatures translate poorly into both Java and Haskell which have
stricter behaviour in their normal definition of method/function
signatures.

I think its OK for tests to be required to always have the second
signature shown above.

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[Ben Laurie]

Sure thing. You should add a test that tests that failing to match
signatures produces an error :-)

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