DocTest
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What is DocTest
DocTest is a small program, that checks examples in Haskell comments. It is modeled after doctest for Python.
Usage
Bellow is a small Haskell module with DocTest examples:
module Fib where
-- Examples:
--
-- > fib 10
-- 55
-- > fib 5
-- 5
fib 0 = 0
fib 1 = 1
fib n = fib (n - 1) + fib (n - 2)
DocTest checks if the implementation of fib
satisfies the given examples:
$ doctest Fib.hs
Lines starting with -- > denote expressions.
All comment lines following an expression denote the
result of that expression, where result is defined by what a
REPL prints to standard output when evaluating that expression.
DocTest on Hackage
http://hackage.haskell.org/cgi-bin/hackage-scripts/package/DocTest