func BenchmarkZag(b *testing.B) {
var block core.Block64_32
b.ResetTimer()
for i := 0; i < b.N; i++ {
core.Zag(&block)
}
}
func TestZigAndZagWork(t *testing.T) {
var diag core.Block64_32
// Set up a block so that lower values are in the upper-left and higher values are in the lower
// right. A zig should sort this.
for x := 0; x < 8; x++ {
for y := 0; y < 8; y++ {
diag[x+y*8] = int32(x + y)
}
}
Convey("Slow versions are correct.", t, func() {
var sorted core.Block64_32
copy(sorted[:], diag[:])
core.ZigSlow(&sorted)
So(sorted, shouldBeSorted)
core.ZagSlow(&sorted)
So(sorted, ShouldResemble, diag)
})
Convey("Fast versions match the slow versions.", t, func() {
c := cmwc.MakeGoodCmwc()
for i := 0; i < 100; i++ {
c.Seed(int64(i))
rng := rand.New(c)
var b0, b1, b2 core.Block64_32
for i := range b0 {
b0[i] = rng.Int31()
}
copy(b1[:], b0[:])
copy(b2[:], b0[:])
So(b1, ShouldResemble, b0)
So(b2, ShouldResemble, b0)
core.ZigSlow(&b0)
core.Zig(&b1)
So(b1, ShouldResemble, b0)
core.ZagSlow(&b0)
core.Zag(&b1)
So(b1, ShouldResemble, b0)
So(b1, ShouldResemble, b2)
}
})
}