Add go_back and go_forward implementation in poltergeist capybara driver

Added in capybara 2.2.0

lib/capybara/poltergeist/browser.rb

@@ -277,6 +277,14 @@ module Capybara::Poltergeist
       raise
     end
 
+    def go_back
+      command 'go_back'
+    end
+
+    def go_forward
+      command 'go_forward'
+    end
+
     private
 
     def log(message)

lib/capybara/poltergeist/client/browser.coffee

@@ -361,3 +361,11 @@ class Poltergeist.Browser
   # This command is purely for testing error handling
   browser_error: ->
     throw new Error('zomg')
+
+  go_back: ->
+    this.page.goBack() if this.page.canGoBack
+    this.sendResponse(true)
+
+  go_forward: ->
+    this.page.goForward() if this.page.canGoForward
+    this.sendResponse(true)

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

@@ -481,6 +481,20 @@ Poltergeist.Browser = (function() {
     throw new Error('zomg');
   };
 
+  Browser.prototype.go_back = function() {
+    if (this.page.canGoBack) {
+      this.page.goBack();
+    }
+    return this.sendResponse(true);
+  };
+
+  Browser.prototype.go_forward = function() {
+    if (this.page.canGoForward) {
+      this.page.goForward();
+    }
+    return this.sendResponse(true);
+  };
+
   return Browser;
 
 })();

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

@@ -6,7 +6,7 @@ Poltergeist.WebPage = (function() {
 
   WebPage.CALLBACKS = ['onAlert', 'onConsoleMessage', 'onLoadFinished', 'onInitialized', 'onLoadStarted', 'onResourceRequested', 'onResourceReceived', 'onError', 'onNavigationRequested', 'onUrlChanged', 'onPageCreated'];
 
-  WebPage.DELEGATES = ['open', 'sendEvent', 'uploadFile', 'release', 'render', 'renderBase64'];
+  WebPage.DELEGATES = ['open', 'sendEvent', 'uploadFile', 'release', 'render', 'renderBase64', 'goBack', 'goForward'];
 
   WebPage.COMMANDS = ['currentUrl', 'find', 'nodeCall', 'documentSize', 'beforeUpload', 'afterUpload'];
 
@@ -391,6 +391,14 @@ Poltergeist.WebPage = (function() {
     }
   };
 
+  WebPage.prototype.canGoBack = function() {
+    return this["native"].canGoBack;
+  };
+
+  WebPage.prototype.canGoForward = function() {
+    return this["native"].canGoForward;
+  };
+
   return WebPage;
 
 }).call(this);

lib/capybara/poltergeist/client/web_page.coffee

@@ -3,7 +3,7 @@ class Poltergeist.WebPage
                 'onLoadStarted', 'onResourceRequested', 'onResourceReceived',
                 'onError', 'onNavigationRequested', 'onUrlChanged', 'onPageCreated']
 
-  @DELEGATES = ['open', 'sendEvent', 'uploadFile', 'release', 'render', 'renderBase64']
+  @DELEGATES = ['open', 'sendEvent', 'uploadFile', 'release', 'render', 'renderBase64', 'goBack', 'goForward']
 
   @COMMANDS  = ['currentUrl', 'find', 'nodeCall', 'documentSize', 'beforeUpload', 'afterUpload']
 
@@ -278,3 +278,9 @@ class Poltergeist.WebPage
           throw new Poltergeist.BrowserError(result.error.message, result.error.stack)
     else
       result.value
+
+  canGoBack: ->
+    @native.canGoBack
+
+  canGoForward: ->
+    @native.canGoForward

lib/capybara/poltergeist/driver.rb

@@ -262,5 +262,13 @@ module Capybara::Poltergeist
     def invalid_element_errors
       [Capybara::Poltergeist::ObsoleteNode, Capybara::Poltergeist::MouseEventFailed]
     end
+
+    def go_back
+      browser.go_back
+    end
+
+    def go_forward
+      browser.go_forward
+    end
   end
 end