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==What is DocTest==
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DocTest is a small program, that checks examples in
Haskell source code comments. It is modeled after
[ doctest for Python].
Bellow is a small Haskell module. The module contains source code comments.
Those comments are examples from an interactive Haskell session and demonstrate how the module is used.
module Fib where
-- Examples:
-- > fib 10
-- 55
-- > fib 5
-- 5
fib 0 = 0
fib 1 = 1
fib n = fib (n - 1) + fib (n - 2)
With DocTest you may checks if the implementation satisfies the given examples, by typing (on your Unix shell):
$ doctest Fib.hs
Lines starting with <hask>-- ></hask> denote ''expressions''.
All comment lines following an expression denote the
''result'' of that expression. Result is defined by what an [ REPL]
(e.g. ghci) prints to <hask>stdout</hask> and <hask>stderror</hask> when
evaluating that expression.
==DocTest on Hackage==

Latest revision as of 15:16, 23 June 2012

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