forked from petergoldstein/dalli
/
test_ring.rb
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/
test_ring.rb
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require 'helper'
describe 'Ring' do
context 'a ring of servers' do
should "have the continuum sorted by value" do
servers = [stub(:hostname => "localhost", :port => "11211", :weight => 1),
stub(:hostname => "localhost", :port => "9500", :weight => 1)]
ring = Dalli::Ring.new(servers, {})
previous_value = 0
ring.continuum.each do |entry|
assert entry.value > previous_value
previous_value = entry.value
end
end
should 'raise when no servers are available/defined' do
ring = Dalli::Ring.new([], {})
assert_raises Dalli::RingError, :message => "No server available" do
ring.server_for_key('test')
end
end
context 'containing only a single server' do
should "raise correctly when it's not alive" do
servers = [
Dalli::Server.new("localhost:12345"),
]
ring = Dalli::Ring.new(servers, {})
assert_raises Dalli::RingError, :message => "No server available" do
ring.server_for_key('test')
end
end
should "return the server when it's alive" do
servers = [
Dalli::Server.new("localhost:19191"),
]
ring = Dalli::Ring.new(servers, {})
memcached(19191) do |mc|
ring = mc.send(:ring)
assert_equal ring.servers.first.port, ring.server_for_key('test').port
end
end
end
context 'containing multiple servers' do
should "raise correctly when no server is alive" do
servers = [
Dalli::Server.new("localhost:12345"),
Dalli::Server.new("localhost:12346"),
]
ring = Dalli::Ring.new(servers, {})
assert_raises Dalli::RingError, :message => "No server available" do
ring.server_for_key('test')
end
end
should "return an alive server when at least one is alive" do
servers = [
Dalli::Server.new("localhost:12346"),
Dalli::Server.new("localhost:19191"),
]
ring = Dalli::Ring.new(servers, {})
memcached(19191) do |mc|
ring = mc.send(:ring)
assert_equal ring.servers.first.port, ring.server_for_key('test').port
end
end
end
should 'detect when a dead server is up again' do
memcached(19997) do
down_retry_delay = 0.5
dc = Dalli::Client.new(['localhost:19997', 'localhost:19998'], :down_retry_delay => down_retry_delay)
assert_equal 1, dc.stats.values.compact.count
memcached(19998) do
assert_equal 2, dc.stats.values.compact.count
end
end
end
end
end