prototype works

.gitignore

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+*.o
+*.hi
+*~
+dist/

LICENSE

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+Copyright (c)2011, Sakari Jokinen
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+
+    * Redistributions in binary form must reproduce the above
+      copyright notice, this list of conditions and the following
+      disclaimer in the documentation and/or other materials provided
+      with the distribution.
+
+    * Neither the name of Sakari Jokinen nor the names of other
+      contributors may be used to endorse or promote products derived
+      from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Setup.hs

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+import Distribution.Simple
+main = defaultMain

src/Test/Framework/DocTest.hs

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+{-| Wrapper for running DocTests with Test.Framework 
+
+First we get the doctests wrapped in 'Test.Framework.Test' using
+'frameDocTestsFrom'.  The first argument to 'frameDocTestsFrom' should be the root module
+i.e., a module that includes all the other modules.
+
+>>> doctests <- frameDocTestsFrom "tests/Test.hs" ["-itests"]
+
+After getting the doctests we can execute the doctests using the
+'defaultMain' or 'defaultMainWithOpts' functions.
+
+>>> defaultMainWithOpts [doctests] defaultOptions
+DocTest:
+  print "abc": [Failed]
+Failed: expression `print "abc"'
+expected: ["\"fail\""]
+ but got: ["\"abc\""]
+  print bar: [OK]
+<BLANKLINE>
+         Test Cases  Total      
+ Passed  1           1          
+ Failed  1           1          
+ Total   2           2          
+*** Exception: ExitFailure 1
+
+Above we used 'defaultMainWithOpts' for running the tests so that we
+can specify that we want plain output as coloride output is not very
+readable:
+
+>>> print $ ropt_plain_output defaultOptions
+Just True
+
+-}
+
+module Test.Framework.DocTest (frameDocTestsFrom) where
+
+import Documentation.Haddock
+import qualified DocTest
+import Test.Framework
+import Test.Framework.Providers.HUnit
+
+defaultOptions = RunnerOptions { ropt_threads = Nothing
+                               , ropt_test_options = Nothing
+                               , ropt_test_patterns = Nothing
+                               , ropt_xml_output = Nothing 
+                               , ropt_plain_output = Just True
+                               , ropt_hide_successes = Nothing
+                               }
+
+-- | Note that 'frameDocTestsFrom' can be called only once per process execution
+
+frameDocTestsFrom::FilePath -> [String] -> IO Test
+frameDocTestsFrom rootPath options = do
+  tests <- DocTest.getDocTests [Flag_Verbosity "0", Flag_NoWarnings] [rootPath]
+  return $ toTestFrameworkGroup (rootPath:options) tests
+
+toTestFrameworkTest :: [String] -> DocTest.DocTest -> Test 
+toTestFrameworkTest options test = testCase testName $ DocTest.withInterpreter options $ flip DocTest.toAssertion test
+  where
+    testName = DocTest.expression $ head $ DocTest.interactions test
+
+toTestFrameworkGroup :: [String] -> [DocTest.DocTest] -> Test
+toTestFrameworkGroup options = mutuallyExclusive . testGroup "DocTest" . map (toTestFrameworkTest options)

test-framework-doctest.cabal

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+Name:                test-framework-doctest
+Version:             0.1
+Synopsis:            Test.Framework wrapper for DocTest
+Description:         Test.Framework wrapper for DocTest
+License:             BSD3
+License-file:        LICENSE
+Author:              Sakari Jokinen
+Maintainer:          sakariij@gmail.com
+Category:            Testing
+Build-type:          Simple
+Cabal-version:       >=1.10
+
+test-suite doctest
+  main-is: Main.hs
+  default-language: Haskell98
+  type: exitcode-stdio-1.0
+  hs-source-dirs: src, tests
+  build-depends:
+    base >= 4,
+    test-framework,
+    test-framework-hunit,
+    DocTest,
+    haddock
+
+Library
+  Hs-source-dirs: src
+  default-language: Haskell98
+  Exposed-modules: Test.Framework.DocTest
+  Build-depends:
+    base,    
+    DocTest,
+    test-framework,
+    test-framework-hunit,
+    haddock

tests/Main.hs

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+module Main where
+
+import Test.Framework.DocTest
+import Test.Framework
+
+main = frameDocTestsFrom "src/Test/Framework/DocTest.hs" [] >>= defaultMain . return

tests/Test.hs

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+{-| Module for testing the doctests 
+
+>>> print "abc"
+"fail"
+
+-}
+
+module Test where
+
+-- | Succeeding example
+--
+-- >>> print bar
+-- 1
+
+bar::Int
+bar = 1
+