Start phantomjs maximized

Default windows size of size phantomjs does not allow
some shadows on the edges of elements to fit in the
crop rectangle. This can be fixed by maximizing
the window.
Other browsers does not have such a problem, so
they are started the same way as before.

lib/browser/element.js

@@ -1,10 +1,12 @@
 'use strict';
 
-var inherit = require('inherit'),
+var util = require('util'),
+    inherit = require('inherit'),
     Rect = require('../geometery/rect');
 
 module.exports = inherit({
-    __constructor: function(wdElement) {
+    __constructor: function(selector, wdElement) {
+        this.selector = selector;
         this._wdElement = wdElement;
     },
 
@@ -24,5 +26,9 @@ module.exports = inherit({
 
     isVisible: function() {
         return this._wdElement.isDisplayed();
+    },
+
+    toString: function() {
+        return util.format('[object Element(selector=\'%s\')]', this.selector);
     }
 });

lib/browser/index.js

@@ -19,18 +19,39 @@ module.exports = inherit({
 
     open: function(url) {
         var _this = this;
-        return this._browser.init({browserName: this.name}).then(function() {
-            return _this._browser.get(url);
-        })
-        .fail(function(e) {
-            if (e.code === 'ECONNREFUSED') {
-                return q.reject(new GeminiError(
-                    'Unable to connect to ' + _this.config.gridUrl,
-                    'Make sure that URL in config file is correct and selenium\nserver is running.'
-                ));
-            }
-            return q.reject(e);
-        });
+        return this._browser.init({browserName: this.name})
+            .then(function() {
+                return _this._browser.get(url);
+            })
+            .then(function() {
+                //maximize is required, because default
+                //windows size in phantomjs can prevent
+                //some shadows from fitting in
+                if (_this._shouldMaximize()) {
+                    return _this._maximize();
+                }
+            })
+            .fail(function(e) {
+                if (e.code === 'ECONNREFUSED') {
+                    return q.reject(new GeminiError(
+                        'Unable to connect to ' + _this.config.gridUrl,
+                        'Make sure that URL in config file is correct and selenium\nserver is running.'
+                    ));
+                }
+                return q.reject(e);
+            });
+    },
+
+    _shouldMaximize: function() {
+        return this.name === 'phantomjs';
+    },
+
+    _maximize: function() {
+        var _this = this;
+        return _this._browser.windowHandle()
+            .then(function(handle) {
+                return _this._browser.maximize(handle);
+            });
     },
 
     buildElementsMap: function(staticSelectors, dynamicSelectors) {
@@ -61,7 +82,7 @@ module.exports = inherit({
     _findElement: function(selector, optional) {
         return this._browser.elementByCssSelector(selector)
             .then(function(wdElement) {
-                return new Element(wdElement);
+                return new Element(selector, wdElement);
             })
             .fail(function(error) {
                 if (optional && error.status === 7) { //element not found