func CMWCSpec(c gospec.Context) {
c.Specify("CMWC32 produces the same output as SlowCMWC.", func() {
fast := core.MakeCMWC32(11, 4)
slow := core.MakeSlowCMWC(11, 1<<32, 1<<4)
N := 100000
for i := 0; i < N; i++ {
f := fast.Next()
s := slow.Next()
c.Expect(f, Equals, s)
if f != s {
break
}
}
})
}
func SlowCMWCSpec(c gospec.Context) {
c.Specify("SlowCMWC produces sequences with the expected period.", func() {
c.Specify("(A, B, R, Period) = (3, 16, 2, 96)", func() {
gen := core.MakeSlowCMWC(3, 16, 2)
period := core.Check(gen, 500)
c.Expect(period, Equals, 96)
})
c.Specify("(A, B, R, Period) = (13, 16, 2, 416)", func() {
gen := core.MakeSlowCMWC(13, 16, 2)
period := core.Check(gen, 500)
c.Expect(period, Equals, 416)
})
c.Specify("(A, B, R, Period) = (37, 256, 2, 128)", func() {
gen := core.MakeSlowCMWC(37, 256, 2)
period := core.Check(gen, 500)
c.Expect(period, Equals, 128)
})
c.Specify("(A, B, R, Period) = (103, 256, 2, 52736)", func() {
gen := core.MakeSlowCMWC(103, 256, 2)
period := core.Check(gen, 100000)
c.Expect(period, Equals, 52736)
})
})
}