Question

所以我试图用HTF来运行一些HUnit风格的断言

% cat tests/TestDemo.hs
{-# OPTIONS_GHC -Wall -F -pgmF htfpp #-}
module Main where
import Test.Framework
import Test.HUnit.Base ((@?=))
import System.Environment (getArgs)

-- just run some tests
main :: IO ()
main = getArgs >>= flip runTestWithArgs Main.allHTFTests

-- all these tests should fail
test_fail_int1 :: Assertion
test_fail_int1 = (0::Int) @?= (1::Int)

test_fail_bool1 :: Assertion
test_fail_bool1 = True @?= False

test_fail_string1 :: Assertion
test_fail_string1 = "0" @?= "1"

test_fail_int2 :: Assertion
test_fail_int2 = [0::Int] @?= [1::Int]

test_fail_string2 :: Assertion
test_fail_string2 = "true" @?= "false"

test_fail_bool2 :: Assertion
test_fail_bool2 = [True] @?= [False]

当我使用ghc --make时，它似乎正常工作。

% ghc --make tests/TestDemo.hs
[1 of 1] Compiling Main             ( tests/TestDemo.hs, tests/TestDemo.o )
Linking tests/TestDemo ...
% tests/TestDemoA
...
* Tests:    6
* Passed:   0
* Failures: 6
* Errors:   0

Failures:
  * Main:fail_int1 (tests/TestDemo.hs:9)
  * Main:fail_bool1 (tests/TestDemo.hs:12)
  * Main:fail_string1 (tests/TestDemo.hs:15)
  * Main:fail_int2 (tests/TestDemo.hs:19)
  * Main:fail_string2 (tests/TestDemo.hs:22)
  * Main:fail_bool2 (tests/TestDemo.hs:25)

但是当我使用cabal构建它时，并非所有应该失败的测试都会失败。

% cat Demo.cabal
...
executable test-demo
  build-depends: base >= 4, HUnit, HTF
  main-is: TestDemo.hs
  hs-source-dirs: tests
% cabal configure
Resolving dependencies...
Configuring Demo-0.0.0...
% cabal build
Preprocessing executables for Demo-0.0.0...
Building Demo-0.0.0...
[1 of 1] Compiling Main             ( tests/TestDemo.hs, dist/build/test-demo/test-demo-tmp/Main.o )
Linking dist/build/test-demo/test-demo ...
% dist/build/test-demo/test-demo
...
* Tests:    6
* Passed:   3
* Failures: 3
* Errors:   0

Failures:
  * Main:fail_int2 (tests/TestDemo.hs:23)
  * Main:fail_string2 (tests/TestDemo.hs:26)
  * Main:fail_bool2 (tests/TestDemo.hs:29)

出了什么问题，我该如何解决？

Answer 1

这是某些GHC版本中的错误，与优化程序在某些情况下删除抛出IO异常有关。如果启用了优化，则在HUnit代码中非常常见。并且cabal默认设置-O1，这将启用错误。

升级到GHC 7修复它（在图书馆赶上它之前不推荐使用它，IE为GHC 7制作了一个haskell平台版本。）

您还可以将-O0放在与测试可执行文件相关的.cabal文件节中的编译器选项中。这是我为测试代码所做的，直到我准备将项目移动到GHC 7。

与cabal，HTF和HUnit断言的奇怪之处

1 个答案: