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go-opengl-pixel
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Supporting pre go1.10

This commit is contained in:
Ben Cragg 2019-04-03 12:37:33 +01:00
parent e6392a228d
commit 352785e1b8
1 changed files with 13 additions and 4 deletions
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17
geometry_test.go
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@ -1202,6 +1202,15 @@ func TestLine_Len(t *testing.T) {
}
func TestLine_Rotated(t *testing.T) {
// round returns the nearest integer, rounding ties away from zero.
// This is required because `math.Round` wasn't introduced until Go1.10
round := func(x float64) float64 {
t := math.Trunc(x)
if math.Abs(x-t) >= 0.5 {
return t + math.Copysign(1, x)
}
return t
}
type fields struct {
A pixel.Vec
B pixel.Vec
@ -1244,10 +1253,10 @@ func TestLine_Rotated(t *testing.T) {
// Have to round the results, due to floating-point in accuracies. Results are correct to approximately
// 10 decimal places.
got := l.Rotated(tt.args.around, tt.args.angle)
if math.Round(got.A.X) != tt.want.A.X ||
math.Round(got.B.X) != tt.want.B.X ||
math.Round(got.A.Y) != tt.want.A.Y ||
math.Round(got.B.Y) != tt.want.B.Y {
if round(got.A.X) != tt.want.A.X ||
round(got.B.X) != tt.want.B.X ||
round(got.A.Y) != tt.want.A.Y ||
round(got.B.Y) != tt.want.B.Y {
t.Errorf("Line.Rotated() = %v, want %v", got, tt.want)
}
})