PhantomJS 1.7 compatibility.

Note that 1.7 is not yet released.

README.md

@@ -206,6 +206,9 @@ makes debugging easier). Running `rake autocompile` will watch the
 *   Fix the text method for title elements, so it doesn't return an
     empty string.
 
+*   Fixed problem with cookies not being clearer between tests on
+    PhantomJS 1.7
+
 ### 0.7.0 ###
 
 #### Features ####

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

@@ -52,6 +52,13 @@ Poltergeist.WebPage = (function() {
     _fn1(delegate);
   }
 
+  WebPage.prototype.release = function() {
+    if (this["native"].clearCookies) {
+      this["native"].clearCookies();
+    }
+    return this["native"].release();
+  };
+
   WebPage.prototype.onInitializedNative = function() {
     this._source = null;
     this.injectAgent();

lib/capybara/poltergeist/client/web_page.coffee

@@ -30,6 +30,11 @@ class Poltergeist.WebPage
       this.prototype[delegate] =
         -> @native[delegate].apply(@native, arguments)
 
+  release: ->
+    # Conditional can be removed once we drop PhantomJS 1.6 support
+    @native.clearCookies() if @native.clearCookies
+    @native.release()
+
   onInitializedNative: ->
     @_source = null
     this.injectAgent()