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require "spec/helper/all"
require "em-synchrony/mysql2"
describe Mysql2::EM::Client do
DELAY = 0.25
QUERY = "SELECT sleep(#{DELAY}) as mysql2_query"
it "should support queries" do
res = []
EventMachine.synchrony do
db = Mysql2::EM::Client.new
res = db.query QUERY
EventMachine.stop
end
res.first.keys.should include("mysql2_query")
end
it "should fire sequential, synchronous requests" do
EventMachine.synchrony do
db = Mysql2::EM::Client.new
start = now
res = []
res.push db.query QUERY
res.push db.query QUERY
(now - start.to_f).should be_within(DELAY * res.size * 0.15).of(DELAY * res.size)
EventMachine.stop
end
end
it "should have accept a callback, errback on async queries" do
EventMachine.synchrony do
db = Mysql2::EM::Client.new
res = db.aquery(QUERY)
res.errback {|r| fail }
res.callback {|r|
r.size.should == 1
EventMachine.stop
}
end
end
it "should fire simultaneous requests via Multi interface" do
EventMachine.synchrony do
db = EventMachine::Synchrony::ConnectionPool.new(size: 2) do
Mysql2::EM::Client.new
end
start = now
multi = EventMachine::Synchrony::Multi.new
multi.add :a, db.aquery(QUERY)
multi.add :b, db.aquery(QUERY)
res = multi.perform
(now - start.to_f).should be_within(DELAY * 0.15).of(DELAY)
res.responses[:callback].size.should == 2
res.responses[:errback].size.should == 0
EventMachine.stop
end
end
it "should fire sequential and simultaneous MySQL requests" do
EventMachine.synchrony do
db = EventMachine::Synchrony::ConnectionPool.new(size: 3) do
Mysql2::EM::Client.new
end
start = now
res = []
res.push db.query(QUERY)
res.push db.query(QUERY)
(now - start.to_f).should be_within(DELAY * res.size * 0.15).of(DELAY * res.size)
start = now
multi = EventMachine::Synchrony::Multi.new
multi.add :a, db.aquery(QUERY)
multi.add :b, db.aquery(QUERY)
multi.add :c, db.aquery(QUERY)
res = multi.perform
(now - start.to_f).should be_within(DELAY * 0.15).of(DELAY)
res.responses[:callback].size.should == 3
res.responses[:errback].size.should == 0
EventMachine.stop
end
end
it "should raise Mysql::Error in case of error" do
EventMachine.synchrony do
db = Mysql2::EM::Client.new
proc {
db.query("SELECT * FROM i_hope_this_table_does_not_exist;")
}.should raise_error(Mysql2::Error)
EventMachine.stop
end
end
it "errback should not catch exception thrown from callback" do
class ErrbackShouldNotCatchThis < Exception; end
proc {
EM.synchrony do
db = Mysql2::EM::Client.new
res = db.query QUERY
raise ErrbackShouldNotCatchThis.new("errback should not catch this")
EventMachine.stop
end
}.should raise_error(ErrbackShouldNotCatchThis)
end
end
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