func makeDeck(rng *cmwc.Cmwc) Deck {
var d Deck
for _, suit := range suits {
for _, rank := range ranks {
d = append(d, string([]byte{rank, suit}))
}
}
for i := range d {
k := int(rng.Int63()%int64(len(d)-i)) + i
d[i], d[k] = d[k], d[i]
}
return d
}
func CMWCGobSpec(c gospec.Context) {
c.Specify("CMWC32 gobs and ungobs properly.", func() {
// Set up c1 and c2 and run them for a while, then we'll c2 and make
// sure it runs the same when it is ungobbed.
c1 := cmwc.MakeCmwc(3278470471, 4)
c2 := cmwc.MakeCmwc(3278470471, 4)
c1.Seed(0x12345678)
c2.Seed(0x12345678)
for i := 0; i < 100000; i++ {
c1.Int63()
c2.Int63()
}
buf := bytes.NewBuffer(nil)
enc := gob.NewEncoder(buf)
err := enc.Encode(c2)
c.Expect(err, Equals, error(nil))
if err != nil {
return
}
dec := gob.NewDecoder(bytes.NewBuffer(buf.Bytes()))
// c2 is going to be constructed from the gobbed data only
var c3 cmwc.Cmwc
err = dec.Decode(&c3)
c.Expect(err, Equals, error(nil))
if err != nil {
return
}
for i := 0; i < 100000; i++ {
// Checking c2 against c2 for many iterations.
v1 := c1.Int63()
v2 := c3.Int63()
c.Expect(v1, Equals, v2)
if v1 != v2 {
return
}
}
})
}
