discourse/spec/lib/discourse_redis_spec.rb
2023-01-09 11:49:28 +00:00

286 lines
7.9 KiB
Ruby

# frozen_string_literal: true
RSpec.describe DiscourseRedis do
it "ignore_readonly returns nil from a pure exception" do
result = DiscourseRedis.ignore_readonly { raise Redis::CommandError.new("READONLY") }
expect(result).to eq(nil)
end
describe "redis commands" do
let(:raw_redis) { Redis.new(DiscourseRedis.config) }
before { raw_redis.flushdb }
after { raw_redis.flushdb }
describe "pipelined / multi" do
let(:redis) { DiscourseRedis.new }
it "should support multi commands" do
val =
redis.multi do |transaction|
transaction.set "foo", "bar"
transaction.set "bar", "foo"
transaction.get "bar"
end
expect(raw_redis.get("foo")).to eq(nil)
expect(raw_redis.get("bar")).to eq(nil)
expect(redis.get("foo")).to eq("bar")
expect(redis.get("bar")).to eq("foo")
expect(val).to eq(%w[OK OK foo])
end
it "should support pipelined commands" do
set, incr = nil
val =
redis.pipelined do |pipeline|
set = pipeline.set "foo", "baz"
incr = pipeline.incr "baz"
end
expect(val).to eq(["OK", 1])
expect(set.value).to eq("OK")
expect(incr.value).to eq(1)
expect(raw_redis.get("foo")).to eq(nil)
expect(raw_redis.get("baz")).to eq(nil)
expect(redis.get("foo")).to eq("baz")
expect(redis.get("baz")).to eq("1")
end
it "should noop pipelined commands against a readonly redis" do
redis.without_namespace.expects(:pipelined).raises(Redis::CommandError.new("READONLY"))
set, incr = nil
val =
redis.pipelined do |pipeline|
set = pipeline.set "foo", "baz"
incr = pipeline.incr "baz"
end
expect(val).to eq(nil)
expect(redis.get("foo")).to eq(nil)
expect(redis.get("baz")).to eq(nil)
end
it "should noop multi commands against a readonly redis" do
redis.without_namespace.expects(:multi).raises(Redis::CommandError.new("READONLY"))
val =
redis.multi do |transaction|
transaction.set "foo", "bar"
transaction.set "bar", "foo"
transaction.get "bar"
end
expect(val).to eq(nil)
expect(redis.get("foo")).to eq(nil)
expect(redis.get("bar")).to eq(nil)
end
end
describe "when namespace is enabled" do
let(:redis) { DiscourseRedis.new }
it "should append namespace to the keys" do
raw_redis.set("default:key", 1)
raw_redis.set("test:key2", 1)
raw_redis.set("default:key3", 1)
expect(redis.keys).to include("key")
expect(redis.keys).to_not include("key2")
expect(redis.scan_each.to_a).to contain_exactly("key", "key3")
redis.del("key", "key3")
expect(raw_redis.get("default:key")).to eq(nil)
expect(raw_redis.get("default:key3")).to eq(nil)
expect(redis.scan_each.to_a).to eq([])
raw_redis.set("default:key1", "1")
raw_redis.set("default:key2", "2")
expect(redis.mget("key1", "key2")).to eq(%w[1 2])
expect(redis.scan_each.to_a).to contain_exactly("key1", "key2")
end
end
describe "#sadd?" do
it "should send the right command with the right key prefix to redis" do
redis = DiscourseRedis.new
redis.without_namespace.expects(:sadd?).with("default:testset", "1", anything)
redis.sadd?("testset", "1")
end
end
describe "#srem?" do
it "should send the right command with the right key prefix to redis" do
redis = DiscourseRedis.new
redis.without_namespace.expects(:srem?).with("default:testset", "1", anything)
redis.srem?("testset", "1")
end
end
describe "when namespace is disabled" do
let(:redis) { DiscourseRedis.new(nil, namespace: false) }
it "should not append any namespace to the keys" do
raw_redis.set("default:key", 1)
raw_redis.set("test:key2", 1)
expect(redis.keys).to include("default:key", "test:key2")
raw_redis.set("key1", "1")
raw_redis.set("key2", "2")
expect(redis.mget("key1", "key2")).to eq(%w[1 2])
redis.del("key1", "key2")
expect(redis.mget("key1", "key2")).to eq([nil, nil])
end
it "should noop a readonly redis" do
expect(Discourse.recently_readonly?).to eq(false)
redis.without_namespace.expects(:set).raises(Redis::CommandError.new("READONLY"))
redis.set("key", 1)
expect(Discourse.recently_readonly?).to eq(true)
end
end
describe "#eval" do
it "keys and arvg are passed correcty" do
keys = %w[key1 key2]
argv = %w[arg1 arg2]
expect(Discourse.redis.eval("return { KEYS, ARGV };", keys: keys, argv: argv)).to eq(
[keys, argv],
)
expect(Discourse.redis.eval("return { KEYS, ARGV };", keys, argv: argv)).to eq([keys, argv])
expect(Discourse.redis.eval("return { KEYS, ARGV };", keys, argv)).to eq([keys, argv])
end
end
describe "#evalsha" do
it "keys and arvg are passed correcty" do
keys = %w[key1 key2]
argv = %w[arg1 arg2]
script = "return { KEYS, ARGV };"
Discourse.redis.script(:load, script)
sha = Digest::SHA1.hexdigest(script)
expect(Discourse.redis.evalsha(sha, keys: keys, argv: argv)).to eq([keys, argv])
expect(Discourse.redis.evalsha(sha, keys, argv: argv)).to eq([keys, argv])
expect(Discourse.redis.evalsha(sha, keys, argv)).to eq([keys, argv])
end
end
end
describe DiscourseRedis::EvalHelper do
it "works" do
helper = DiscourseRedis::EvalHelper.new <<~LUA
return 'hello world'
LUA
expect(helper.eval(Discourse.redis)).to eq("hello world")
end
it "works with arguments" do
helper = DiscourseRedis::EvalHelper.new <<~LUA
return ARGV[1]..ARGV[2]..KEYS[1]..KEYS[2]
LUA
expect(helper.eval(Discourse.redis, %w[key1 key2], %w[arg1 arg2])).to eq("arg1arg2key1key2")
end
it "works with arguments" do
helper = DiscourseRedis::EvalHelper.new <<~LUA
return ARGV[1]..ARGV[2]..KEYS[1]..KEYS[2]
LUA
expect(helper.eval(Discourse.redis, %w[key1 key2], %w[arg1 arg2])).to eq("arg1arg2key1key2")
end
it "uses evalsha correctly" do
redis_proxy =
Class
.new do
attr_reader :calls
def method_missing(meth, *args, **kwargs, &block)
@calls ||= []
@calls.push(meth)
Discourse.redis.public_send(meth, *args, **kwargs, &block)
end
end
.new
Discourse.redis.call("SCRIPT", "FLUSH", "SYNC")
helper = DiscourseRedis::EvalHelper.new <<~LUA
return 'hello world'
LUA
expect(helper.eval(redis_proxy)).to eq("hello world")
expect(helper.eval(redis_proxy)).to eq("hello world")
expect(helper.eval(redis_proxy)).to eq("hello world")
expect(redis_proxy.calls).to eq(%i[evalsha eval evalsha evalsha])
end
end
describe ".new_redis_store" do
let(:cache) { Cache.new(namespace: "foo") }
let(:store) { DiscourseRedis.new_redis_store }
before do
cache.redis.del("key")
store.delete("key")
end
it "can store stuff" do
store.fetch("key") { "key in store" }
r = store.read("key")
expect(r).to eq("key in store")
end
it "doesn't collide with our Cache" do
store.fetch("key") { "key in store" }
cache.fetch("key") { "key in cache" }
r = store.read("key")
expect(r).to eq("key in store")
end
it "can be cleared without clearing our cache" do
cache.clear
store.clear
store.fetch("key") { "key in store" }
cache.fetch("key") { "key in cache" }
store.clear
expect(store.read("key")).to eq(nil)
expect(cache.fetch("key")).to eq("key in cache")
end
end
end