36 lines
1.0 KiB
Elm
36 lines
1.0 KiB
Elm
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module PointTest exposing (specs)
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import Point exposing (Point, Pos, downsample)
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import Test exposing (..)
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import Expect exposing (Expectation)
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newPoint i = Point
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(1731437067 + (toFloat i)*1.2)
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(Pos 52 1 (Just 10))
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(Just (round(sin((toFloat i)/10)*10))) (Just i) Nothing
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points n = List.map newPoint (List.range 0 n)
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maybe default val =
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case val of
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Just v -> v
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Nothing -> default
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specs: Test
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specs =
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describe "downsample"
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[ test "it returns no more points than requested" <|
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\_ ->
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let orig = (points 10)
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sampled = Point.downsample 5 orig
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in Expect.equal 5 (List.length sampled)
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, test "it drops points which are too close together" <|
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\_ ->
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let orig = List.map newPoint [ 0, 1, 2, 3, 4, 10, 500, 1000 ]
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sampled = Point.downsample 10 orig
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idx p = maybe 0 p.power
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in Expect.equalLists [0, 500, 1000] (List.map idx sampled)
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]
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