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require 'spec_helper'
module FakeRedis
describe "TransactionsMethods" do
before(:all) do
@client = Redis.new
end
before(:each) do
@client.discard rescue nil
end
context '#multi' do
it "should respond with 'OK'" do
expect(@client.multi).to eq('OK')
end
it "should forbid nesting" do
@client.multi
expect{@client.multi}.to raise_error(Redis::CommandError)
end
it "should mark the start of a transaction block" do
transaction = @client.multi do |multi|
multi.set("key1", "1")
multi.set("key2", "2")
multi.expire("key1", 123)
multi.mget("key1", "key2")
end
expect(transaction).to eq(["OK", "OK", true, ["1", "2"]])
end
end
context '#discard' do
it "should respond with 'OK' after #multi" do
@client.multi
expect(@client.discard).to eq('OK')
end
it "can't be run outside of #multi/#exec" do
expect{@client.discard}.to raise_error(Redis::CommandError)
end
end
context '#exec' do
it "can't be run outside of #multi" do
expect{@client.exec}.to raise_error(Redis::CommandError)
end
end
context 'saving up commands for later' do
before(:each) do
@client.multi
@string = 'fake-redis-test:string'
@list = 'fake-redis-test:list'
end
it "makes commands respond with 'QUEUED'" do
expect(@client.set(@string, 'string')).to eq('QUEUED')
expect(@client.lpush(@list, 'list')).to eq('QUEUED')
end
it "gives you the commands' responses when you call #exec" do
@client.set(@string, 'string')
@client.lpush(@list, 'list')
@client.lpush(@list, 'list')
expect(@client.exec).to eq(['OK', 1, 2])
end
it "does not raise exceptions, but rather puts them in #exec's response" do
@client.set(@string, 'string')
@client.lpush(@string, 'oops!')
@client.lpush(@list, 'list')
responses = @client.exec
expect(responses[0]).to eq('OK')
expect(responses[1]).to be_a(RuntimeError)
expect(responses[2]).to eq(1)
end
end
context 'executing hash commands in a block' do
it "returns true if the nested hash command succeeds" do
responses = @client.multi { |multi| multi.hset('hash', 'key', 'value') }
expect(responses[0]).to eq(1)
end
end
context 'executing set commands in a block' do
it "returns commands' responses for nested commands" do
@client.sadd('set', 'member1')
responses = @client.multi do |multi|
multi.sadd('set', 'member1')
multi.sadd('set', 'member2')
end
expect(responses).to eq([false, true])
end
end
end
end
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