![]() In this presentation, we are asking the program to format a page for our printer, yet we have no printer. Stress testing is a powerful testing technique in that we can see how programs fail (or rather, how well they fail). We will be "stressing" the application by asking for a function to be run without giving the function the necessary components. In this presentation, we are testing the Print Preview function, but we do not have a printer installed. We use Stress testing to examine how a program reacts to adverse conditions, and how well it is able to recover or quit in these conditions if necessary. This example demonstrates the use of Stress testing. At the time of writing this presentation, FireFox was still pre-1.0 (meaning that it was still a preview release for testing purposes). Mozilla's FireFox is an Internet browser available for Linux, MacOS, and Windows. Error messages display informing the user of an "Unknown Error" and the Print Preview controls cease to respond, which interrupts (but does not halt) the user's Internet browser. However, if no printer is currently installed, FireFox encounters an error when launching the Print Preview. Print Preview Bug When No Printer Installed in FireFoxīefore a user prints a page from the Internet in Mozilla FireFox, s/he can have the program display a 'print preview', a function that shows how that Internet page will print.
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