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Contents
require "more/spec_helper"
describe "Synchronize" do
it "synchronize_method" do
class SAccount
attr_reader :from, :to
def initialize
super
@from, @to = 0, 0
end
def transfer
@from -= 1
@to += 1
end
synchronize_method :transfer
end
a, threads = SAccount.new, []
100.times do
t = Thread.new do
100.times{a.transfer}
end
threads << t
end
threads.each{|t| t.join}
a.from.should == -10_000
a.to.should == 10_000
end
it "synchronize_all_methods" do
class SAccount2
attr_reader :from, :to
def initialize
super
@from, @to = 0, 0
end
def transfer
@from -= 1
@to += 1
end
synchronize_all_methods
end
a, threads = SAccount2.new, []
100.times do
t = Thread.new do
100.times{a.transfer}
end
threads << t
end
threads.each{|t| t.join}
a.from.should == -10_000
a.to.should == 10_000
end
it "singleton" do
class SAccount3
class << self
def a; end
synchronize_method :a
end
end
SAccount3.a
end
it "shouldn't allow to synchronize twice" do
class SAccount4
def a; end
end
SAccount4.synchronize_method :a
-> {SAccount4.synchronize_method :a}.should raise_error(/twice/)
end
end
Version data entries
14 entries across 14 versions & 1 rubygems