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34 lines
1.6 KiB
Elm
34 lines
1.6 KiB
Elm
module StrainTest where
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-- TODO - remove example inclusion once Problem sets are ready to go live or CI is set up.
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import ElmTest.Test exposing (test, Test, suite)
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import ElmTest.Assertion exposing (assert, assertEqual)
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import ElmTest.Runner.Element exposing (runDisplay)
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import StrainExample exposing (keep, discard)
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import String
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even = \number -> number % 2 == 0
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odd = \number -> number % 2 == 1
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isFirstLetter = \letter-> \word -> (String.left 1 word) == letter
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lessThanTen = \num -> num < 10
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tests : Test
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tests = suite "Strain Test Suite"
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[ test "empty keep" (assertEqual [] (keep lessThanTen [])),
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test "keep everything" (assertEqual [1, 2, 3] (keep lessThanTen [1, 2, 3])),
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test "keep first and last" (assertEqual [1, 3] (keep odd [1, 2, 3])),
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test "keep nothing" (assertEqual [] (keep even [1,3,5,7])),
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test "keep neither first nor last" (assertEqual [2] (keep even [1, 2, 3])),
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test "keep strings" (assertEqual ["zebra", "zombies", "zealot"] (keep (isFirstLetter "z") ["apple", "zebra", "banana", "zombies", "cherimoya", "zealot"])),
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test "empty discard" (assertEqual [] (discard lessThanTen [])),
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test "discard everything" (assertEqual [] (discard lessThanTen [1, 2, 3])),
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test "discard first and last" (assertEqual [2] (discard odd [1, 2, 3])),
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test "discard nothing" (assertEqual [1,3,5,7] (discard even [1,3,5,7])),
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test "discard neither first nor last" (assertEqual [1, 3] (discard even [1, 2, 3])),
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test "discard strings" (assertEqual ["apple", "banana", "cherimoya"] (discard (isFirstLetter "z") ["apple", "zebra", "banana", "zombies", "cherimoya", "zealot"]))
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]
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main = runDisplay tests
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