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90 lines
2.4 KiB
Elm
90 lines
2.4 KiB
Elm
port module Main exposing (..)
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import Test.Runner.Node exposing (run, TestProgram)
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import Json.Encode exposing (Value)
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import Test exposing (..)
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import Expect
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import Strain exposing (keep, discard)
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import String
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even : Int -> Bool
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even number =
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number % 2 == 0
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odd : Int -> Bool
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odd number =
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number % 2 == 1
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isFirstLetter : String -> String -> Bool
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isFirstLetter letter word =
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(String.left 1 word) == letter
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lessThanTen : comparable -> Bool
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lessThanTen num =
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num < 10
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tests : Test
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tests =
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describe "Strain"
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[ test "empty keep" <|
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\() ->
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Expect.equal []
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(keep lessThanTen [])
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, test "keep everything" <|
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\() ->
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Expect.equal [ 1, 2, 3 ]
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(keep lessThanTen [ 1, 2, 3 ])
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, test "keep first and last" <|
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\() ->
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Expect.equal [ 1, 3 ]
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(keep odd [ 1, 2, 3 ])
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, test "keep nothing" <|
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\() ->
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Expect.equal []
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(keep even [ 1, 3, 5, 7 ])
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, test "keep neither first nor last" <|
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\() ->
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Expect.equal [ 2 ]
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(keep even [ 1, 2, 3 ])
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, test "keep strings" <|
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\() ->
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Expect.equal [ "zebra", "zombies", "zealot" ]
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(keep (isFirstLetter "z") [ "apple", "zebra", "banana", "zombies", "cherimoya", "zealot" ])
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, test "empty discard" <|
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\() ->
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Expect.equal []
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(discard lessThanTen [])
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, test "discard everything" <|
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\() ->
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Expect.equal []
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(discard lessThanTen [ 1, 2, 3 ])
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, test "discard first and last" <|
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\() ->
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Expect.equal [ 2 ]
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(discard odd [ 1, 2, 3 ])
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, test "discard nothing" <|
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\() ->
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Expect.equal [ 1, 3, 5, 7 ]
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(discard even [ 1, 3, 5, 7 ])
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, test "discard neither first nor last" <|
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\() ->
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Expect.equal [ 1, 3 ]
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(discard even [ 1, 2, 3 ])
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, test "discard strings" <|
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\() ->
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Expect.equal [ "apple", "banana", "cherimoya" ]
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(discard (isFirstLetter "z") [ "apple", "zebra", "banana", "zombies", "cherimoya", "zealot" ])
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]
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main : TestProgram
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main =
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run emit tests
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port emit : ( String, Value ) -> Cmd msg
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