Can set cookies for given domain

README.md

@@ -337,6 +337,7 @@ Include as much information as possible. For example:
 *   Invalid selectors throw a useful error message
 *   Tie us to the 0.4 version of faye-websocket since the 0.5 version
     contains breaking changes.
+*   Can set cookies for given domain
 
 ### 1.2.0 ###
 

lib/capybara/poltergeist/driver.rb

@@ -177,11 +177,12 @@ module Capybara::Poltergeist
     def set_cookie(name, value, options = {})
       options[:name]  ||= name
       options[:value] ||= value
-
-      if @started
-        options[:domain] = URI.parse(browser.current_url).host
-      else
-        options[:domain] = Capybara.app_host || "127.0.0.1"
+      options[:domain] ||= begin
+        if @started
+          URI.parse(browser.current_url).host
+        else
+          Capybara.app_host || "127.0.0.1"
+        end
       end
 
       browser.set_cookie(options)

spec/integration/driver_spec.rb

@@ -406,6 +406,18 @@ module Capybara::Poltergeist
         @driver.cookies['foo'].expires.should == time
       end
 
+      it 'can set cookies for given domain' do
+        port = @session.server.port
+        @driver.set_cookie 'capybara', '127.0.0.1'
+        @driver.set_cookie 'capybara', 'localhost', :domain => 'localhost'
+
+        @session.visit("http://localhost:#{port}/poltergeist/get_cookie")
+        @driver.body.should include('localhost')
+
+        @session.visit("http://127.0.0.1:#{port}/poltergeist/get_cookie")
+        @driver.body.should include('127.0.0.1')
+      end
+
       it 'can enable and disable cookies' do
         @driver.cookies_enabled = false
         @session.visit('/set_cookie')