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golang
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1.22.0
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src
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image
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color
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color.go
(8.25 KB)
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color_test.go
(890 B)
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palette
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ycbcr.go
(10.82 KB)
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ycbcr_test.go
(7.28 KB)
Editing: color_test.go
// Copyright 2017 The Go Authors. All rights reserved. // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. package color import ( "testing" "testing/quick" ) func TestSqDiff(t *testing.T) { // canonical sqDiff implementation orig := func(x, y uint32) uint32 { var d uint32 if x > y { d = uint32(x - y) } else { d = uint32(y - x) } return (d * d) >> 2 } testCases := []uint32{ 0, 1, 2, 0x0fffd, 0x0fffe, 0x0ffff, 0x10000, 0x10001, 0x10002, 0xfffffffd, 0xfffffffe, 0xffffffff, } for _, x := range testCases { for _, y := range testCases { if got, want := sqDiff(x, y), orig(x, y); got != want { t.Fatalf("sqDiff(%#x, %#x): got %d, want %d", x, y, got, want) } } } if err := quick.CheckEqual(orig, sqDiff, &quick.Config{MaxCountScale: 10}); err != nil { t.Fatal(err) } }
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