Week 20140420

Advanced technique for web functional testing

• test responsive: self.driver.set_window_size
• Needle -- test by comparing screenshots
• Saucelabs
• the selenium guidebook
• selenium testing tools cookbook

Web scraping with Python

• multiprocessing.Pool
• argparse module

Micellaneous

• decorators with arguments

• manually create swap file

  Recently when I try to update the opam on my DigitalOcean server, the below error pop up:

  opam: "fork" failed: Cannot allocate memory.

  It is due to lack of RAM memory. The solution is to create a swap file. I followed the instructions here, note to compile core a 512MB swap is not enough, I ended up creating a 1G swap. DigitalOcean also has a nice article on creating swap files