func BenchmarkPowerAllSame(b *testing.B) {
var b0, b1 core.Block8RGB
b.ResetTimer()
for i := 0; i < b.N; i++ {
core.Power(&b0, &b1)
}
}
func BenchmarkPowerAllDifferent(b *testing.B) {
var b0, b1 core.Block8RGB
for i := range b1 {
b1[i] = byte(i)
}
b.ResetTimer()
for i := 0; i < b.N; i++ {
core.Power(&b0, &b1)
}
}
func TestPower(t *testing.T) {
var b0, b1, b2, b3, b4 core.Block8RGB
b0[0] = 10
b0[1] = 20
b0[2] = 30
b0[3] = 40
b0[4] = 50
b0[5] = 60
b1[0] = 20
b1[1] = 30
b1[2] = 40
b1[3] = 50
b1[4] = 60
b1[5] = 70
for i := range b3 {
// Something randomish
b3[i] = byte(i*10 + i*i + 3)
if b3[i] == 0 {
b3[i] = 1
}
b4[i] = b3[i] - 1
}
Convey("Blocks have zero power relative to themselves", t, func() {
So(core.Power(&b0, &b0), ShouldEqual, uint64(0))
So(core.Power(&b1, &b1), ShouldEqual, uint64(0))
So(core.Power(&b2, &b2), ShouldEqual, uint64(0))
So(core.Power(&b3, &b3), ShouldEqual, uint64(0))
})
Convey("Simple manual power check", t, func() {
So(core.Power(&b0, &b1), ShouldEqual, uint64(600))
So(core.Power(&b1, &b0), ShouldEqual, uint64(600))
})
Convey("Simple manual power check", t, func() {
So(core.Power(&b0, &b2), ShouldEqual, uint64(9100))
So(core.Power(&b2, &b0), ShouldEqual, uint64(9100))
})
Convey("Simple manual power check", t, func() {
So(core.Power(&b1, &b2), ShouldEqual, uint64(13900))
So(core.Power(&b2, &b1), ShouldEqual, uint64(13900))
})
Convey("Simple manual power check - zero vs zero", t, func() {
So(core.Power(&b2, &b2), ShouldEqual, uint64(0))
})
Convey("Power function should cover every pixel in a block", t, func() {
So(core.Power(&b3, &b4), ShouldEqual, uint64(192))
So(core.Power(&b4, &b3), ShouldEqual, uint64(192))
})
}