run-tests: teach Test instances whether they are in unittest mode Tests executing in unittest mode behave a little differently. For example, they report their results to a TestResult rather than just printing. This patch paves the way for better integration of Test into the unittest framework.

run-tests: teach unittest about warned results

run-tests: document how success code is handled

run-tests: teach unittest about ignored tests

run-tests: teach unittest about skipped tests

run-tests: define custom result and runner classes for unittest We need to teach unittest about some custom result types. This will require some custom classes. This patch creates a skeleton for them.

run-tests: start to report test results against TestResult Previously, our unittest wrapper didn't report results properly. We now properly report failures. We had to rename the local variable to prevent "t" from being overwritten in the local scope.

run-tests: give unittest wrapper a short description This will make the output contain something useful rather than the default repr() for the class.

run-tests: initial support for running tests with unittest The unittest package in Python's standard library provides an almost universal mechanism for defining and running tests. This patch starts the process of making run-tests.py talk to it. The main benefit of speaking unittest is that this will enable Mercurial's tests to be more easily consumed by other testing tools, like nose. This is useful for 3rd party extensions having their own test infrastructure, for example. Running tests in unittest mode will not result in completely sane behavior until the unittest mode is made the default execution mode. Expect things like double printing of output until support stabilizes.

localrepo: reverse contexts in status This is a slight tweak to how localrepo.status calculates what files have changed. By forcing a changectx to be first operator and anything not a changectx to be the second operator, we can later exploit this to allow refactoring the status operation as a method of a context object. Furthermore, this change will speed up 'hg diff --reverse' when used with the working directory because the code will now hit a fast path without needing to calculate an unneeded second manifest.