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45 lines
1.4 KiB
Haskell
45 lines
1.4 KiB
Haskell
module OrderedMapSpec where
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import OrderedMap as Map
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import Test.Hspec
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spec :: Spec
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spec = do
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describe "difference" $ do
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it "should return those elements of a not in b" $
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Map.difference a b `shouldBe` (Map.fromList [ ("a", 1) ])
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it "is asymmetrical" $ do
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Map.difference a b `shouldNotBe` Map.difference b a
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describe "union" $ do
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it "should return those elements in either a or b" $
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Map.union a b `shouldBe` (Map.fromList $ Map.toList a ++ [ ("d", -4) ])
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it "is asymmetrical" $ do
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Map.union a b `shouldNotBe` Map.union b a
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describe "unions" $ do
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it "is equivalent to `union` for two maps" $
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Map.unions [ a, b ] `shouldBe` Map.union a b
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it "does not duplicate elements" $
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Map.unions [ a, b, a, b, a, b ] `shouldBe` Map.union a b
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describe "intersectionWith" $ do
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it "should return those elements in both a and b, combined with a function" $
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Map.intersectionWith (-) a b `shouldBe` (Map.fromList [ ("b", 4), ("c", 6) ])
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it "is asymmetrical" $ do
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Map.intersectionWith (-) a b `shouldNotBe` Map.intersectionWith (-) b a
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describe "keys" $ do
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it "should return all the keys in a map" $
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Map.keys a `shouldBe` [ "a", "b", "c" ]
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it "is ordered" $
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Map.keys (Map.union b a) `shouldBe` [ "b", "c", "d", "a" ]
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where a = Map.fromList [ ("a", 1), ("b", 2), ("c", 3) ]
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b = Map.fromList [ ("b", -2), ("c", -3), ("d", -4) ]
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