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package hashtag
import (
"math/rand"
"testing"
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
)
func TestGinkgoSuite(t *testing.T) {
RegisterFailHandler(Fail)
RunSpecs(t, "hashtag")
}
var _ = Describe("CRC16", func() {
// http://redis.io/topics/cluster-spec#keys-distribution-model
It("should calculate CRC16", func() {
tests := []struct {
s string
n uint16
}{
{"123456789", 0x31C3},
{string([]byte{83, 153, 134, 118, 229, 214, 244, 75, 140, 37, 215, 215}), 21847},
}
for _, test := range tests {
Expect(crc16sum(test.s)).To(Equal(test.n), "for %s", test.s)
}
})
})
var _ = Describe("HashSlot", func() {
It("should calculate hash slots", func() {
tests := []struct {
key string
slot int
}{
{"123456789", 12739},
{"{}foo", 9500},
{"foo{}", 5542},
{"foo{}{bar}", 8363},
{"", 10503},
{"", 5176},
{string([]byte{83, 153, 134, 118, 229, 214, 244, 75, 140, 37, 215, 215}), 5463},
}
// Empty keys receive random slot.
rand.Seed(100)
for _, test := range tests {
Expect(Slot(test.key)).To(Equal(test.slot), "for %s", test.key)
}
})
It("should extract keys from tags", func() {
tests := []struct {
one, two string
}{
{"foo{bar}", "bar"},
{"{foo}bar", "foo"},
{"{user1000}.following", "{user1000}.followers"},
{"foo{{bar}}zap", "{bar"},
{"foo{bar}{zap}", "bar"},
}
for _, test := range tests {
Expect(Slot(test.one)).To(Equal(Slot(test.two)), "for %s <-> %s", test.one, test.two)
}
})
})
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