Fix session creation.

Author: ioquatix

lib/async/webdriver/bridge/pool.rb

@@ -71,6 +71,11 @@ def concurrency
 						def acquire
 							if @sessions.empty?
 								session = @client.post("session", {capabilities: @capabilities})
+								
+								if session.nil?
+									raise Async::WebDriver::Error, "Failed to create session with capabilities: #{@capabilities.inspect}"
+								end
+								
 								session[:cache] = self
 								session[:endpoint] = @driver.endpoint
 

lib/async/webdriver/request_helper.rb

@@ -46,10 +46,10 @@ def request_path(path = nil)
 			# @returns [Object] The unwrapped value.
 			def unwrap_object(value)
 				if value.is_a?(Hash) and value.key?(ELEMENT_KEY)
-					Element.new(self.session, value[ELEMENT_KEY])
-				else
-					value
+					value = Element.new(self.session, value[ELEMENT_KEY])
 				end
+				
+				return value
 			end
 
 			# Used by `JSON.load` to unwrap objects.
@@ -60,6 +60,8 @@ def unwrap_objects(value)
 				when Array
 					value.map!(&method(:unwrap_object))
 				end
+				
+				return value
 			end
 
 			# Extract the value from the reply.