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#159 Use more precise delta for floats comparision

This commit is contained in:
Jacek Olszak 2019-02-12 15:24:17 +01:00
parent cabaee680e
commit 3b366d1edd
1 changed files with 7 additions and 6 deletions
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13
geometry_test.go
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@ -81,23 +81,24 @@ func TestResizeRect(t *testing.T) {
}
func TestMatrix_Unproject(t *testing.T) {
const delta = 4e-16
t.Run("for rotated matrix", func(t *testing.T) {
matrix := pixel.IM.Rotated(pixel.ZV, math.Pi/2)
unprojected := matrix.Unproject(pixel.V(0, 1))
assert.InDelta(t, unprojected.X, 1, 0.01)
assert.InDelta(t, unprojected.Y, 0, 0.01)
assert.InDelta(t, unprojected.X, 1, delta)
assert.InDelta(t, unprojected.Y, 0, delta)
})
t.Run("for moved matrix", func(t *testing.T) {
matrix := pixel.IM.Moved(pixel.V(5, 5))
unprojected := matrix.Unproject(pixel.V(0, 0))
assert.InDelta(t, unprojected.X, -5, 0.01)
assert.InDelta(t, unprojected.Y, -5, 0.01)
assert.InDelta(t, unprojected.X, -5, delta)
assert.InDelta(t, unprojected.Y, -5, delta)
})
t.Run("for scaled matrix", func(t *testing.T) {
matrix := pixel.IM.Scaled(pixel.ZV, 2)
unprojected := matrix.Unproject(pixel.V(4, 4))
assert.InDelta(t, unprojected.X, 2, 0.01)
assert.InDelta(t, unprojected.Y, 2, 0.01)
assert.InDelta(t, unprojected.X, 2, delta)
assert.InDelta(t, unprojected.Y, 2, delta)
})
t.Run("for singular matrix", func(t *testing.T) {
matrix := pixel.Matrix{0, 0, 0, 0, 0, 0}