Add 'users/glittershark/xanthous/' from commit '53b56744f4335c038724a1bcffc27a7eb8cf6a6d' r/978

git-subtree-dir: users/glittershark/xanthous
git-subtree-mainline: 91f53f02d8479303910abfd3f3690d3ef27e6c4b
git-subtree-split: 53b56744f4335c038724a1bcffc27a7eb8cf6a6d

1 files changed, 20 insertions, 0 deletions

diff --git a/users/glittershark/xanthous/test/Xanthous/Data/NestedMapSpec.hs b/users/glittershark/xanthous/test/Xanthous/Data/NestedMapSpec.hs
new file mode 100644
index 000000000000..acf7a67268f4
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+++ b/users/glittershark/xanthous/test/Xanthous/Data/NestedMapSpec.hs
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+--------------------------------------------------------------------------------
+module Xanthous.Data.NestedMapSpec (main, test) where
+--------------------------------------------------------------------------------
+import           Test.Prelude
+--------------------------------------------------------------------------------
+import           Test.QuickCheck.Instances.Semigroup ()
+--------------------------------------------------------------------------------
+import qualified Xanthous.Data.NestedMap as NM
+--------------------------------------------------------------------------------
+
+main :: IO ()
+main = defaultMain test
+
+test :: TestTree
+test = testGroup "Xanthous.Data.NestedMap"
+  [ testProperty "insert/lookup" $ \nm ks v ->
+      let nm' = NM.insert ks v nm
+      in counterexample ("inserted: " <> show nm')
+         $ NM.lookup @Map @Int @Int ks nm' === Just (NM.Val v)
+  ]