33 lines
736 B
Go
33 lines
736 B
Go
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package util
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import "testing"
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func TestRangeMapping(t *testing.T) {
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cases := []struct {
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x, xmin, xmax, ymin, ymax float64
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expected int
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}{
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// Test positive
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{-100, -100, 100, 0, 1000, 0},
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{0, -100, 100, 0, 1000, 500},
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{100, -100, 100, 0, 1000, 1000},
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// Test negative
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{0, 0, 100, 0, 1000, 0},
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{50, 0, 100, 0, 1000, 500},
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{100, 0, 100, 0, 1000, 1000},
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// Reverse
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{0, 100, 0, 0, 1000, 1000},
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{50, 100, 0, 0, 1000, 500},
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{100, 100, 0, 0, 1000, 0},
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}
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for _, c := range cases {
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val := MapRange(c.x, c.xmin, c.xmax, c.ymin, c.ymax)
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if val != c.expected {
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t.Errorf("MapRange(%.0f, %.0f, %.0f, %.0f, %.0f): %d, wants %d", c.x, c.xmin, c.xmax, c.ymin, c.ymax, val, c.expected)
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}
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}
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}
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