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$: << File.dirname(__FILE__) + '/../lib'
require 'remcached'
describe Memcached do
def run(&block)
EM.run do
Memcached.servers = %w(127.0.0.1 localhost:11211 localhost localhost)
@timer = EM::PeriodicTimer.new(0.01) do
# at least localhost & localhost
if Memcached.usable_clients.length >= 2
@timer.cancel
block.call
end
end
end
end
def stop
Memcached.servers = []
EM.stop
end
context "when doing a simple operation" do
it "should add a value" do
run do
Memcached.add(:key => 'Hello',
:value => 'World') do |result|
result.should be_kind_of(Memcached::Response)
result[:status].should == Memcached::Errors::NO_ERROR
result[:cas].should_not == 0
stop
end
end
end
it "should get a value" do
run do
Memcached.get(:key => 'Hello') do |result|
result.should be_kind_of(Memcached::Response)
result[:status].should == Memcached::Errors::NO_ERROR
result[:value].should == 'World'
result[:cas].should_not == 0
@old_cas = result[:cas]
stop
end
end
end
it "should set a value" do
run do
Memcached.set(:key => 'Hello',
:value => 'Planet') do |result|
result.should be_kind_of(Memcached::Response)
result[:status].should == Memcached::Errors::NO_ERROR
result[:cas].should_not == 0
result[:cas].should_not == @old_cas
stop
end
end
end
it "should get a value" do
run do
Memcached.get(:key => 'Hello') do |result|
result.should be_kind_of(Memcached::Response)
result[:status].should == Memcached::Errors::NO_ERROR
result[:value].should == 'Planet'
result[:cas].should_not == @old_cas
stop
end
end
end
it "should delete a value" do
run do
Memcached.delete(:key => 'Hello') do |result|
result.should be_kind_of(Memcached::Response)
result[:status].should == Memcached::Errors::NO_ERROR
stop
end
end
end
it "should not get a value" do
run do
Memcached.get(:key => 'Hello') do |result|
result.should be_kind_of(Memcached::Response)
result[:status].should == Memcached::Errors::KEY_NOT_FOUND
stop
end
end
end
$n = 100
context "when incrementing a counter #{$n} times" do
it "should initialize the counter" do
run do
Memcached.set(:key => 'counter',
:value => '0') do |result|
stop
end
end
end
it "should count #{$n} times" do
@counted = 0
def count
Memcached.get(:key => 'counter') do |result|
result[:status].should == Memcached::Errors::NO_ERROR
value = result[:value].to_i
Memcached.set(:key => 'counter',
:value => (value + 1).to_s,
:cas => result[:cas]) do |result|
if result[:status] == Memcached::Errors::KEY_EXISTS
count # again
else
result[:status].should == Memcached::Errors::NO_ERROR
@counted += 1
stop if @counted >= $n
end
end
end
end
run do
$n.times { count }
end
end
it "should have counted up to #{$n}" do
run do
Memcached.get(:key => 'counter') do |result|
result[:status].should == Memcached::Errors::NO_ERROR
result[:value].to_i.should == $n
stop
end
end
end
end
end
context "when using multiple servers" do
it "should not return the same hash for the succeeding key" do
run do
Memcached.hash_key('0').should_not == Memcached.hash_key('1')
stop
end
end
it "should not return the same client for the succeeding key" do
run do
# wait for 2nd client to be connected
EM::Timer.new(0.1) do
Memcached.client_for_key('0').should_not == Memcached.client_for_key('1')
stop
end
end
end
it "should spread load (observe from outside :-)" do
run do
n = 10000
replies = 0
n.times do |i|
Memcached.set(:key => "#{i % 100}",
:value => rand(1 << 31).to_s) {
replies += 1
stop if replies >= n
}
end
end
end
end
context "when manipulating multiple records at once" do
before :all do
@n = 10
end
def key(n)
"test:item:#{n}"
end
it "should add some items" do
run do
items = []
@n.times { |i|
items << { :key => key(i),
:value => 'Foo',
:expiration => 20 } if i % 2 == 0
}
Memcached.multi_add(items) { |responses|
stop
@n.times { |i|
if i % 2 == 0 && (response_i = responses[key(i)])
response_i[:status].should == Memcached::Errors::NO_ERROR
end
}
}
end
end
it "should get all items" do
run do
items = []
@n.times { |i|
items << { :key => key(i) }
}
Memcached.multi_get(items) { |responses|
stop
@n.times { |i|
if i % 2 == 0
responses.should have_key(key(i))
responses[key(i)][:status].should == Memcached::Errors::NO_ERROR
responses[key(i)][:value].should == 'Foo'
else
# either no response because request was quiet, or not
# found in case of last response
if (response_i = responses[key(i)])
response_i[:status].should == Memcached::Errors::KEY_NOT_FOUND
end
end
}
}
end
end
it "should delete all items" do
run do
items = []
@n.times { |i|
items << { :key => key(i) }
}
Memcached.multi_delete(items) { |responses|
stop
@n.times { |i|
if i % 2 == 0
# either no response because request was quiet, or ok in
# case of last response
if (response_i = responses[key(i)])
response_i[:status].should == Memcached::Errors::NO_ERROR
end
else
responses[key(i)][:status].should == Memcached::Errors::KEY_NOT_FOUND
end
}
}
end
end
context "when the multi operation is empty" do
it "should return immediately" do
@results = []
@calls = 0
Memcached.multi_add([]) { |responses|
@results += responses
@calls += 1
}
@results.should be_empty
@calls.should == 1
end
end
end
end
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