Hello,

I am not aware of anyone using Tosca to test, but that doesn't mean it can't be used. I'm not familiar with it enough myself to say one way or another. Pega has built in testing tools that you might consider using. Here is a link that should provide you a number of resources.

https://community.pega.com/sites/default/files/help_v73/procomhelpmain.htm

For questions about IE support, please check the platform support guide. 

https://collaborate.pega.com/discussion/prpc-5x-6x-platform-support-guide-easy-find

Thanks,
Mike

TOSCA's regression testing tools look like they are a similar DOM (webdriver) based test framework similar to HPE QTP, Selenium and so on. For API based testing, it is likely a framework around service invocation similar to SOAPUI, Rest Assured and so on. All of these tools are compatible with Pega applications as fundamentally Pega apps run like any browser-based apps or there are service APIs in the platform or can be easily introduced for any application under test. We have a few features in the platform that can assist to make some of this testing easier such as Test ID - https://docs-previous.pega.com/test-id-and-tour-id-unique-identification-ui-elements

Of course if you are considering a more comprehensive testing strategy, you might want to refer to the following PDN page about testing strategy - https://pdn.pega.com/pega-platform-application-testing-devops-pipeline/pega-platform-application-testing-devops-pipeline

Tosca can be used to test Pega Application UI and API and/or to setup test data in order to test other aspects.

To speed up testing in pega I'm using the 'Valori Accelerator for Pegasystems', which is freely available on the Tricentis Marketplace: https://www.tricentis.com/resource-assets/valori-accelerator-for-pegasystems/