DocTest

From HaskellWiki

1 What is DocTest

DocTest is a small program, that checks examples in Haskell comments. It is modeled after doctest for Python.

2 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)

satisfies the given examples:

$ doctest Fib.hs

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.

3 DocTest on Hackage

http://hackage.haskell.org/cgi-bin/hackage-scripts/package/DocTest

4 Branches

http://code.haskell.org/~sih/code/DocTest.git/