With template haskell, is there a way to list all functions in scope? Something like
allVarsInScope :: Q [Name]
What I'm trying to do with this is get a list of all imported functions beginning with test_, and run the tests automatically.
Asked
Active
Viewed 296 times
4
-
[Test.QuickCheck.All](http://hackage.haskell.org/packages/archive/QuickCheck/2.4.1.1/doc/html/Test-QuickCheck-All.html) in case your tests are QuickCheck properties. – Daniel Wagner Aug 02 '12 at 07:12
-
It doesn't cross module boundaries. – Clark Gaebel Aug 02 '12 at 11:24
-
For automatic test running [see HTF project](http://hackage.haskell.org/package/HTF). It does pretty amazing things. – Nikita Volkov Oct 30 '13 at 18:52
1 Answers
3
Sadly, there is no such reflection capability in Template Haskell, but there are workarounds. However, before writing something like this yourself, I recommend trying the test-framework-th package which already does this for HUnit tests beginning with case_ and also for QuickCheck properties beginning with prop_.
Under the hood, this package uses the language-haskell-extract package which essentially runs its own parsing pass over the module to pick out the definitions. It's a somewhat hacky solution, but it works well enough in practice. However, it does bring in a fair number of dependencies and the additional parsing pass can slow down your builds.
hammar
- 138,522
- 17
- 304
- 385
-
If I could help it, I'd rather not re-parse every module with a test at build-time. – Clark Gaebel Aug 02 '12 at 11:24