whiley_test_file 0.6.2

An API for manipulating test files for the Whiley Programming Language.
Documentation 
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original.name="Fail_Valid_1"
======
>>> main.whiley
type nat is (int x) where x >= 0
type neg is (int x) where x < 0

function f(int x) -> bool|null:
    //
    if x is nat:
        return true
    else if x is neg:
        return false
    else:
        fail

public export method test() :
    assume f(-1) == false
    assume f(0) == true
    assume f(1) == true

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