我正在尝试在 Haskell 中进行一些单元测试,这基本上是我在代码中所做的:
module Test where
import Test.HUnit
test = TestList [TestLabel "running all the tests!"
$ TestList [
. . . . .
]]
run = runTestTT tests
当我尝试使用 gchi 编译它时,我收到以下消息:
Could not find module ‘Test.HUnit’
Use -v to see a list of the files searched for.
Failed, modules loaded: none
如何让 HUnit 工作?
我正在使用 GHCi 版本 7.8.3
谢谢
编辑:
作为建议的答案,我尝试通过 cabal 安装 HUnit,但随后出现错误:
Could not find module ‘Test.HUnit’ Perhaps you haven't installed the "dyn" libraries for
package ‘HUnit-1.2.5.2’?
Use -v to see a list of the files searched for.
然后我使用了命令:
cabal install base
我收到了这条消息:
Resolving dependencies...
All the requested packages are already installed:
base-4.7.0.1
Use --reinstall if you want to reinstall anyway.
所以我使用了命令:
cabal install base -reinstall
重新安装以防万一,我收到消息:
Resolving dependencies...
cabal: Could not resolve dependencies:
rejecting: base-4.7.0.1, 4.7.0.0, 4.6.0.1, 4.6.0.0, 4.5.1.0, 4.5.0.0, 4.4.1.0,
4.4.0.0, 4.3.1.0, 4.3.0.0, 4.2.0.2, 4.2.0.1, 4.2.0.0, 4.1.0.0, 4.0.0.0 (only
already installed instances can be used)
rejecting: base-3.0.3.2 (conflict: base => base>=4.0 && <4.3)
rejecting: base-3.0.3.1 (conflict: base => base>=4.0 && <4.2)
我应该怎么办?