Add test for Haskell globalLibraries option

Author: klezm

src/haskell/devcontainer-feature.json

@@ -40,7 +40,7 @@
             "type": "string",
             "proposals": [
                 "",
-                "hspec hspec-contrib"
+                "hspec hspec-contrib QuickCheck HUnit"
             ],
             "default": "",
             "description": "Libraries to install via `cabal install --lib`, such as `hspec` for testing. Separate with spaces. This will add significant initial build time."

test/haskell/scenarios.json

@@ -4,5 +4,13 @@
         "features": {
             "haskell": {}
         }
+    },
+    "test_libraries": {
+        "image": "mcr.microsoft.com/devcontainers/base:debian",
+        "features": {
+            "haskell": {
+                "globalLibraries": "hspec hspec-contrib QuickCheck HUnit"
+            }
+        }
     }
 }

test/haskell/test_libraries.sh

@@ -0,0 +1,9 @@
+#!/bin/bash
+
+set -e
+
+source dev-container-features-test-lib
+
+check "cabal install --lib" ghc -e "import Test.Hspec; import Test.QuickCheck"
+
+reportResults