From ee376e6432d26b41f6103d7d011144862d8f413f Mon Sep 17 00:00:00 2001
From: Thomas Walpole <twalpole@gmail.com>
Date: Mon, 27 Jun 2016 15:06:59 -0700
Subject: [PATCH] Add Support for window maximize

---
 CHANGELOG.md                       |  1 +
 README.md                          |  2 ++
 lib/capybara/poltergeist/driver.rb |  8 ++++++++
 spec/integration/driver_spec.rb    | 17 +++++++++++++++++
 4 files changed, 28 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index f475efdd..abeed246 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,7 @@
 ### Next release ###
 
 #### Features ####
+*   Add Window#maximize support - defaults to 1366x768 can be overridden with :screen_size option in driver registration (Thomas Walpole)
 
 #### Bug fixes ####
 
diff --git a/README.md b/README.md
index adf3ea40..02a5f3cd 100644
--- a/README.md
+++ b/README.md
@@ -266,6 +266,8 @@ end
 *   `:js_errors` (Boolean) - When false, JavaScript errors do not get re-raised in Ruby.
 *   `:window_size` (Array) - The dimensions of the browser window in which to test, expressed
     as a 2-element array, e.g. [1024, 768]. Default: [1024, 768]
+*   `:screen_size` (Array) - The dimensions the window size will be set to when Window#maximize is called.  Expressed
+    as a 2-element array, e.g. [1600, 1200]. Default: [1366, 768]
 *   `:phantomjs_options` (Array) - Additional [command line options](http://phantomjs.org/api/command-line.html)
     to be passed to PhantomJS, e.g. `['--load-images=no', '--ignore-ssl-errors=yes']`
 *   `:extensions` (Array) - An array of JS files to be preloaded into
diff --git a/lib/capybara/poltergeist/driver.rb b/lib/capybara/poltergeist/driver.rb
index 447999f2..be95ac35 100644
--- a/lib/capybara/poltergeist/driver.rb
+++ b/lib/capybara/poltergeist/driver.rb
@@ -210,6 +210,10 @@ def resize_window_to(handle, width, height)
       end
     end
 
+    def maximize_window(handle)
+      resize_window_to(handle, *screen_size)
+    end
+
     def window_size(handle)
       within_window(handle) do
         evaluate_script('[window.innerWidth, window.innerHeight]')
@@ -380,6 +384,10 @@ def dismiss_modal(type, options = {})
 
     private
 
+    def screen_size
+      options[:screen_size] || [1366,768]
+    end
+
     def find_modal(options)
       start_time    = Time.now
       timeout_sec   = options[:wait] || begin Capybara.default_max_wait_time rescue Capybara.default_wait_time end
diff --git a/spec/integration/driver_spec.rb b/spec/integration/driver_spec.rb
index d5121eb6..57241b10 100644
--- a/spec/integration/driver_spec.rb
+++ b/spec/integration/driver_spec.rb
@@ -82,6 +82,23 @@ def session_url(path)
       ).to eq([200, 400])
     end
 
+    it 'defaults viewport maximization to 1366x768' do
+      @session.visit('/')
+      @session.current_window.maximize
+      expect(@session.current_window.size).to eq([1366, 768])
+    end
+
+    it 'allows custom maximization size' do
+      begin
+        @driver.options[:screen_size] = [1600, 1200]
+        @session.visit('/')
+        @session.current_window.maximize
+        expect(@session.current_window.size).to eq([1600, 1200])
+     ensure
+        @driver.options.delete(:screen_size)
+      end
+    end
+
     it 'allows the page to be scrolled' do
       @session.visit('/poltergeist/long_page')
       @driver.resize(10, 10)