On front end, almost none. Apps are very test-hostile, so much so that just setting up the framework can increase complexity by ^3.
Well, unit tests are fine and often we do it for things like testing that email parsers and unit conversion works. As long as it's easier than manual testing.
It's also easier to do tests than debug sometimes.
Back end is a different story - the ROI on tests increases drastically because tests are easier to write and failure is more expensive.
Comments
On front end, almost none. Apps are very test-hostile, so much so that just setting up the framework can increase complexity by ^3.
Well, unit tests are fine and often we do it for things like testing that email parsers and unit conversion works. As long as it's easier than manual testing.
It's also easier to do tests than debug sometimes.
Back end is a different story - the ROI on tests increases drastically because tests are easier to write and failure is more expensive.