Mocking LWP::UserAgent properly
This is an update to an earlier post I wrote about the adventures I had in creating and using a mock LWP::UserAgent for testing purposes. The ever-vigilant mst overheard a conversation on the same topic, and jumped in. He pointed out that Test::MockObject (and everything using it) overrides UNIVERSAL::isa in a way that hides bugs. Because it can hide bugs, it is definitely not safe to use in a test suite, where you’re trying to uncover bugs.