I am currently working on a project that uses Selenium to perform automated tests on several products. I am in a disagreement with my coworker who claims that running the chrome browser in headless mode affects the quality of testing (but he does not elaborate).
So, how can running chrome in headless mode affect the quality of testing? Are there any functional differences in headless mode vs normal mode? If so, how would those differences typically affect selenium based tests at runtime?
https://www.chromium.org/blink
Previously headless browsers like phantomjs used to use webkit rendering engine but now chrome has inbuild headless support and uses same rendering enginee blink
so there is no effect of quality
only thing is the headless could be little more faster
Also note w3c is on by default for non headless chrome but for headless chrome it is false and use JSONwire protocol , that doesn't affect quality of test but just for your information
https://stackoverflow.com/a/65841695/6793637
refer my above answer
As of Feb , 2021
https://bugs.chromium.org/p/chromedriver/issues/detail?id=1925
Headless chrome doesn't support preferrences setting . This has nothing to do with quality tho
