Default the viewport size to 1024x768

lib/capybara/poltergeist/client/compiled/main.js

@@ -35,4 +35,4 @@ phantom.injectJs('web_page.js');
 phantom.injectJs('node.js');
 phantom.injectJs('connection.js');
 phantom.injectJs('browser.js');
-new Poltergeist(phantom.args[0]);
+new Poltergeist(phantom.args[0]);

lib/capybara/poltergeist/client/compiled/web_page.js

@@ -9,6 +9,10 @@ Poltergeist.WebPage = (function() {
     this["native"] = require('webpage').create();
     this.nodes = {};
     this._source = "";
+    this["native"].viewportSize = {
+      width: 1024,
+      height: 768
+    };
     _ref = WebPage.CALLBACKS;
     for (_i = 0, _len = _ref.length; _i < _len; _i++) {
       callback = _ref[_i];

lib/capybara/poltergeist/client/web_page.coffee

@@ -9,6 +9,8 @@ class Poltergeist.WebPage
     @nodes   = {}
     @_source = ""
 
+    @native.viewportSize = { width: 1024, height: 768 }
+
     for callback in WebPage.CALLBACKS
       this.bindCallback(callback)
 
@@ -27,7 +29,7 @@ class Poltergeist.WebPage
   onInitializedNative: ->
     @_source = null
     this.injectAgent()
-    this.setScrollPosition({ left: 0, top: 0})
+    this.setScrollPosition({ left: 0, top: 0 })
 
   injectAgent: ->
     if this.evaluate(-> typeof __poltergeist) == "undefined"

spec/integration/session_spec.rb

@@ -45,6 +45,11 @@ describe Capybara::Session do
         @session.should have_content("Hello")
         other_session.should have_content("Hello")
       end
+
+      it 'should have a viewport size of 1024x768 by default' do
+        @session.visit('/')
+        @session.evaluate_script('[window.innerWidth, window.innerHeight]').should == [1024, 768]
+      end
     end
   end
 end