Handle text parameter Element#type

fixes #144

Element.js

@@ -258,8 +258,17 @@ Element.prototype = {
 	 */
 	type: function (value) {
 		function getPostData(arrayValue) {
-			if (self.session.capabilities.isWebDriver) {
-				return { value: arrayValue.join('').split('') };
+			var capabilities = self.session.capabilities;
+			if (capabilities.isWebDriver || capabilities.valueParameterCalledText) {
+				if (capabilities.valueParameterCalledText) {
+					// The WebDriver version of `/value` requires the value
+					// property to be named `text` and to contain a string.
+					return { text: arrayValue.join('') };
+				} else {
+					// Browsers that support WebDriver but use the `value`
+					// property require it to be a flat array of characters.
+					return { value: arrayValue.join('').split('') };
+				}
 			}
 			return { value: arrayValue };
 		}
@@ -288,7 +297,13 @@ Element.prototype = {
 		}
 
 		// If the input isn't a filename, just post the value directly
-		return this._post('value', getPostData(value)).then(noop);
+		return this._post('value', getPostData(value)).then(noop).catch(function(error){
+			if (error.detail.error === 'invalid argument' &&
+					!self.session.capabilities.valueParameterCalledText) {
+				self.session.capabilities.valueParameterCalledText = true;
+				return self.type(value);
+			}
+		});
 	},
 
 	/**

Server.js

@@ -415,6 +415,12 @@ Server.prototype = {
 			capabilities.browserVersion = capabilities.version;
 		}
 
+		// WebDriver Spec now supports [POST] /value  receiving a
+		// parameter named 'text' as a string instead of an array of
+		// charactrers named 'value'. This was updated in geckodriver as
+		// of 16.0 but not yet completed in chromedriver.
+		capabilities.valueParameterCalledText = false;
+
 		function supported() { return true; }
 		function unsupported() { return false; }
 		function maybeSupported(error) {