Dear Jose,
Many people nowadays use their mobile phones or tablets to access websites, so testing a responsive web design is important because the user experience on mobile devices is quite different from desktops.
Possibly the most challenging part of testing a responsive website is making sure the website works as expected on multiple devices and platforms, but actual testing on all the mobile devices in the market isn’t practical for most of us.
Many testers who start testing responsive web design, they usually start by resizing the browser’s window to fit the viewport or breakpoints sizes of mobile phone, tablet and desktop.
This technique is usually adequate for a quick visual check of the website in different view ports and helps us to identify major rendering issues as we shrink or enlarge the browser window.
However, testing on real mobile devices is a total different experience as you now have gestures like finger swipes, tapping, pinch-to-zoom, portrait or landscape. Likewise, on desktops you have hovering, right-clicking, mouse scrolls, etc.
Responsive design should take into consideration all these variances.
Thanks.
