Add test for dirty source trees

script/test

@@ -74,11 +74,6 @@ for t in $SNACK_TESTS; do
   popd
 done
 
-banner "Test that versions are stripped in package.yaml"
-pushd tests/strips-versions
-./test
-popd
-
 banner "Test this file's formatting"
 list=$(shfmt -i 2 -l script/test)
 if [[ -n "$list" ]]; then

tests/library-3/golden

@@ -0,0 +1,5 @@
+1
+2
+3
+4
+5

tests/library-3/golden.jq

@@ -0,0 +1,5 @@
+[
+  "Bar",
+  "Foo",
+  "FooBar"
+]

tests/library-3/lib/Bar.hs

@@ -0,0 +1,7 @@
+module Bar where
+
+import Conduit
+import FooBar
+
+main :: IO ()
+main = runConduit $ spitOut .| takeC 5 .| digest

tests/library-3/lib/Foo.hs

@@ -0,0 +1,6 @@
+module Foo where
+
+import qualified Bar
+
+someFunc :: IO ()
+someFunc = Bar.main

tests/library-3/snack.nix

@@ -0,0 +1,10 @@
+let
+  my-lib =
+    { src = ./src;
+      dependencies = [ "conduit" ];
+    };
+in
+  { src = ./lib;
+    dependencies = [ "conduit" ];
+    packages = [ my-lib ];
+  }

tests/library-3/src/FooBar.hs

@@ -0,0 +1,9 @@
+module FooBar where
+
+import Conduit
+
+spitOut :: ConduitT () Int IO ()
+spitOut = yieldMany [ 1 ..]
+
+digest :: ConduitT Int Void IO ()
+digest = mapM_C print

tests/library-3/test

@@ -0,0 +1,20 @@
+#!/usr/bin/env bash
+# vim: ft=sh sw=2 et
+
+set -euo pipefail
+
+test() {
+  TMP_FILE=$(mktemp)
+
+  cat $($SNACK build) | jq -M '.result | keys' > $TMP_FILE
+
+  diff golden.jq $TMP_FILE
+
+  capture_io "$TMP_FILE" main | $SNACK ghci
+  diff golden $TMP_FILE
+  rm $TMP_FILE
+}
+
+SNACK="snack" test
+SNACK="snack -s ./snack.nix" test
+# Note: no HPack test, because HPack doesn't support multi library