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4d81104a85
This allows learners to gradually approach exercise. However, unlike commented tests, the Elm compiler is still able to infer type information from the skipped tests.
86 lines
3.3 KiB
Elm
86 lines
3.3 KiB
Elm
module Tests exposing (..)
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import Test exposing (..)
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import Expect
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import ListOps exposing (..)
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tests : Test
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tests =
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describe "List Ops"
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[ describe "length"
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[ test "empty list" <|
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\() -> Expect.equal 0 (ListOps.length [])
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, skip <|
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test "non-empty list" <|
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\() -> Expect.equal 4 (ListOps.length (List.range 1 4))
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]
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, describe "reverse"
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[ skip <|
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test "empty list" <|
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\() -> Expect.equal [] (ListOps.reverse [])
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, skip <|
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test "non-empty list" <|
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\() -> Expect.equal [ 4, 3, 2, 1 ] (ListOps.reverse (List.range 1 4))
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]
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, describe "map"
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[ skip <|
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test "empty list" <|
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\() -> Expect.equal [] (ListOps.map ((+) 1) [])
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, skip <|
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test "non-empty list" <|
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\() -> Expect.equal (List.range 2 5) (ListOps.map ((+) 1) (List.range 1 4))
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]
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, describe "filter"
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[ skip <|
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test "empty list" <|
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\() -> Expect.equal [] (ListOps.filter (\_ -> True) [])
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, skip <|
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test "non-empty list" <|
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\() -> Expect.equal [ 2, 4 ] (ListOps.filter (\x -> x % 2 == 0) (List.range 1 4))
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]
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, describe "foldl"
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[ skip <|
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test "empty list" <|
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\() -> Expect.equal 0 (ListOps.foldl (+) 0 [])
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, skip <|
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test "non-empty list" <|
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\() -> Expect.equal 10 (ListOps.foldl (+) 0 (List.range 1 4))
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, skip <|
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test "direction" <|
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\() -> Expect.equal [ 4, 3, 2, 1 ] (ListOps.foldl (::) [] (List.range 1 4))
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]
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, describe "foldr"
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[ skip <|
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test "empty list" <|
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\() -> Expect.equal 0 (ListOps.foldr (+) 0 [])
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, skip <|
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test "non-empty list" <|
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\() -> Expect.equal 10 (ListOps.foldr (+) 0 (List.range 1 4))
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, skip <|
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test "direction" <|
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\() -> Expect.equal (List.range 1 4) (ListOps.foldr (::) [] (List.range 1 4))
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]
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, describe "append"
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[ skip <|
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test "empty lists" <|
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\() -> Expect.equal [] (ListOps.append [] [])
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, skip <|
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test "empty and non-empty lists" <|
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\() -> Expect.equal (List.range 1 4) (ListOps.append [] (List.range 1 4))
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, skip <|
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test "non-empty and empty lists" <|
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\() -> Expect.equal (List.range 1 4) (ListOps.append (List.range 1 4) [])
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, skip <|
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test "non-empty lists" <|
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\() -> Expect.equal (List.range 1 8) (ListOps.append (List.range 1 4) (List.range 5 8))
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]
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, describe "concat"
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[ skip <|
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test "empty list" <|
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\() -> Expect.equal [] (ListOps.concat [])
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, skip <|
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test "list of lists" <|
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\() -> Expect.equal (List.range 1 10) (ListOps.concat [ List.range 1 3, [], List.range 4 7, List.range 8 10 ])
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]
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]
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