Added tests.

spec/redis_spec.rb

@@ -0,0 +1,53 @@
+require File.dirname(__FILE__) + '/spec_helper'
+
+describe "redis" do
+  before(:all) do
+    # use database 15 for testing so we dont accidentally step on you real data
+    @redis = Redis.new :db => 15
+    @semaphore = Redis::Semaphore.new(:my_semaphore, @redis)
+  end
+
+  before(:each) do
+    @redis.flushdb
+  end
+
+  after(:each) do
+    @redis.flushdb
+  end
+
+  after(:all) do
+    @redis.quit
+  end
+
+  it "should be unlocked from the start" do
+    @semaphore.locked?.should == false
+  end
+
+  it "should lock and unlock" do
+    @semaphore.lock
+    @semaphore.locked?.should == true
+    @semaphore.unlock
+    @semaphore.locked?.should == false
+  end
+
+  it "should not lock twice as a mutex" do
+    @semaphore.lock
+    @semaphore.lock(1).should == false
+  end
+
+  it "should not lock three times when only two available" do
+    multisem = Redis::Semaphore.new(:my_semaphore2, 2, @redis)
+    multisem.lock.should == true
+    multisem.lock(1).should == true
+    multisem.lock(1).should == false
+  end
+
+  it "should execute the given code block" do
+    code_executed = false
+    @semaphore.lock do
+      code_executed = true
+    end
+    code_executed.should == true    
+  end
+
+end

spec/spec_helper.rb

@@ -0,0 +1,18 @@
+require 'rubygems'
+require 'bundler'
+Bundler.setup(:default, :test)
+Bundler.require(:default, :test)
+
+require 'rspec'
+require 'redis'
+require 'logger'
+
+$TESTING=true
+$:.unshift File.join(File.dirname(__FILE__), '..', 'lib')
+require 'redis/semaphore'
+
+RSpec::Matchers.define :have_key do |expected|
+  match do |redis|
+    redis.exists(expected)
+  end
+end