I'm running tests using Siesta from command line.
Is that possible to generate screenshots on each test fail while running Siesta test runner?
Edit:
Need to wait for the feature
http://www.bryntum.com/products/siesta/changelog/
It's not possible in current version 2.0.8, but they are planning to add this in future. More info can be found on their forum http://www.bryntum.com/forum/
Also Siesta can be runned in cloud on http://www.browserstack.com/ or https://saucelabs.com/. These services offers evene whole screencasts of the tests.