INTERVIEW QUESTIONS AUTOMATED TESTING TOOLS SELENIUM DETAILS

Question: What is the use of The waitFor Commands in AJAX applications?

Answer: The major drawback of using andWait commands is that it will not work as the page is not actually refreshed.

Pausing the test execution for a certain period of time is also not a good approach as web element might appear later or earlier than the stipulated period depending on the system’s responsiveness, load or other uncontrolled factors of the moment, leading to test failures. The best approach would be to wait for the needed element in a dynamic period and then continue the execution as soon as the element is found.

In AJAX driven web applications, data is retrieved from server without refreshing the page.
This is done using waitFor commands, as waitForElementPresent or waitForVisible, which wait dynamically, checking for the desired condition every second and continuing to the next command in the script as soon as the condition is met.

The major drawback of using andWait commands is that it will not work as the page is not actually refreshed.

Pausing the test execution for a certain period of time is also not a good approach as web element might appear later or earlier than the stipulated period depending on the system’s responsiveness, load or other uncontrolled factors of the moment, leading to test failures. The best approach would be to wait for the needed element in a dynamic period and then continue the execution as soon as the element is found.

In AJAX driven web applications, data is retrieved from server without refreshing the page.
This is done using waitFor commands, as waitForElementPresent or waitForVisible, which wait dynamically, checking for the desired condition every second and continuing to the next command in the script as soon as the condition is met. Source: CoolInterview.com

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