1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
|
require "spec_helper"
module FakeRedis
describe "HyperLogLogsMethods" do
let(:redis) { Redis.new }
it "should add item to hyperloglog" do
expect(redis.pfadd("hll", "val")).to eq(true)
expect(redis.pfcount("hll")).to eq(1)
end
it "should not add duplicated item to hyperloglog" do
redis.pfadd("hll", "val")
expect(redis.pfadd("hll", "val")).to eq(false)
expect(redis.pfcount("hll")).to eq(1)
end
it "should not add multiple items to hyperloglog" do
expect(redis.pfadd("hll", ["val1", "val2"])).to eq(true)
expect(redis.pfcount("hll")).to eq(2)
end
it "should return zero as cardinality for nonexistent key" do
expect(redis.pfcount("nonexistent")).to eq(0)
end
it "should return cardinality of union of hyperloglogs" do
redis.pfadd("hll1", ["val1", "val2"])
redis.pfadd("hll2", ["val2", "val3"])
expect(redis.pfcount("hll1", "hll2")).to eq(3)
end
it "should error if an empty list of keys is given" do
expect { redis.pfcount([]) }.to raise_error(Redis::CommandError, "ERR wrong number of arguments for 'pfcount' command")
end
it "should merge hyperloglogs" do
redis.pfadd("hll1", ["val1", "val2"])
redis.pfadd("hll2", ["val2", "val3"])
expect(redis.pfmerge("hll3", "hll1", "hll2")).to eq(true)
expect(redis.pfcount("hll3")).to eq(3)
end
it "should merge nonexistent hyperloglogs with others" do
redis.pfadd("hll1", "val")
expect(redis.pfmerge("hll3", "hll1", "nonexistent")).to eq(true)
expect(redis.pfcount("hll3")).to eq(1)
end
end
end
|
