Move tests to tests and exes to exe

Summary:
This works around https://github.com/haskell/cabal/issues/4350
If we don't do this files get compiled multiple times
and cabal is unhappy.

Reviewed By: patapizza

Differential Revision: D4782749

fbshipit-source-id: 5bbe425

README.md

@@ -16,16 +16,11 @@ A Haskell environment is required. We recommend using
 To compile and run the binary:
 ```
 $ stack build
-$ stack exec duckling-example-exec
+$ stack exec duckling-example-exe
 ```
 The first time you run it, it will download all required packages.
 
-To run a source file directly (after compiling once):
-```
-$ stack ExampleMain.hs
-```
-
-See `ExampleMain.hs` for an example on how to integrate Duckling in your
+See `exe/ExampleMain.hs` for an example on how to integrate Duckling in your
 project.
 
 ## Supported dimensions
@@ -50,7 +45,7 @@ Duckling supports many languages, but most don't support all dimensions yet
 ## Extending Duckling
 To regenerate the classifiers and run the test suite:
 ```
-$ stack RegenMain.hs && stack test
+$ stack exec duckling-regen-exe && stack test
 ```
 
 It's important to regenerate the classifiers after updating the code and before

duckling.cabal

@@ -454,6 +454,7 @@ library
 test-suite duckling-test
   type:                exitcode-stdio-1.0
   main-is:             TestMain.hs
+  hs-source-dirs:      tests
   build-depends:       duckling
                      , base                  >= 4.8.2 && < 5.0
                      , attoparsec            >= 0.13.1.0 && < 0.14
@@ -557,6 +558,7 @@ test-suite duckling-test
 
                      -- Ordinal
                      , Duckling.Ordinal.AR.Tests
+                     , Duckling.Ordinal.DA.Tests
                      , Duckling.Ordinal.DE.Tests
                      , Duckling.Ordinal.EN.Tests
                      , Duckling.Ordinal.ET.Tests
@@ -638,6 +640,7 @@ test-suite duckling-test
 
 executable duckling-regen-exe
   main-is:             RegenMain.hs
+  hs-source-dirs:      exe
   ghc-options:         -threaded -rtsopts -with-rtsopts=-N
   other-modules:       Duckling.Ranking.Train
                      , Duckling.Ranking.Generate
@@ -664,6 +667,7 @@ executable duckling-regen-exe
 
 executable duckling-example-exe
   main-is:             ExampleMain.hs
+  hs-source-dirs:      exe
   ghc-options:         -threaded -rtsopts -with-rtsopts=-N
   other-modules:       Duckling.Data.TimeZone
   build-depends:       duckling