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.

test: split test-largefile.t in multiple file The `test-largefiles.t` unified test is significantly longer (about 30%) than any other tests in the mercurial test suite. As a result, its is alway the last test my test runner is waiting for at the end of a run. In practice, this means that `test-largefile.t` is wasting half a minute of my life every times I'm running the mercurial test suites. This probably mean more a few cumulated day by now. I've finally decided to split it up in multiple smaller tests to bring it back in reasonable length. This changeset extracts independent test cases in two files. One dedicated to wire protocole testing, and another one dedicated to all other tests that could be independently extracted. No test case were haltered in the making of this changeset. Various timing available below. All timing have been done on a with 90 jobs on a 64 cores machine. Similar result are shown on firefly (20 jobs on 12 core). General timing of the whole run -------------------------------- We see a 25% real time improvement for no significant cpu time impact. Before split: real 2m1.149s user 58m4.662s sys 11m28.563s After split: real 1m31.977s user 57m45.993s sys 11m33.634s Last test to finish (using run-test.py --time) ---------------------------------------------- test-largefile.t is now finishing at the same time than other slow tests. Before split: Time Test 119.280 test-largefiles.t 93.995 test-mq.t 89.897 test-subrepo.t 86.920 test-glog.t 85.508 test-rename-merge2.t 83.594 test-revset.t 79.824 test-keyword.t 78.077 test-mq-header-date.t After split: Time Test 90.414 test-mq.t 88.594 test-largefiles.t 85.363 test-subrepo.t 81.059 test-glog.t 78.927 test-rename-merge2.t 78.021 test-revset.t 77.777 test-command-template.t Timing of largefile test themself ----------------------------------- Running only tests prefixed with "test-largefiles". No significant change in cumulated time. Before: Time Test 58.673 test-largefiles.t 2.931 test-largefiles-cache.t 0.583 test-largefiles-small-disk.t After: Time Test 31.754 test-largefiles.t 17.460 test-largefiles-misc.t 8.888 test-largefiles-wireproto.t 2.864 test-largefiles-cache.t 0.580 test-largefiles-small-disk.t

mq: use the editor gotten by "getcommiteditor()" instead of "ui.edit()" (qrefresh/qfold) This patch also replaces "editor = False" by "editor = cmdutil.getcommiteditor()", because: - it allows to hook commit message determination easily, even in the case without "--edit" - it avoids regression (or additional care) around saving "last-message.txt", even if MQ's "newcommit()" changes its implementation logic from "localrepository.commit" to "localrepository.commitctx" with "memctx" in the future to save commit message into "last-messge.txt" with "memctx", "editor" should be valid function.

mq: fold the code paths to invoke editor into specific logic (qrefresh/qfold) This factoring simplifies the succeeding patch to switch from "ui.edit()" to "getcommiteditor()" for qrefresh/qfold.

mq: use the editor gotten by "getcommiteditor()" instead of "ui.edit()" (qnew) This patch also replaces "editor = False" by "editor = cmdutil.getcommiteditor()", because: - the latter allows to hook commit message determination easily, even in the case without "--edit" - the latter can avoid regression (or additional care) around saving "last-message.txt", even if MQ's "newcommit()" changes its implementation logic from "localrepository.commit" to "localrepository.commitctx" with "memctx" in the future to save commit message into "last-messge.txt" with "memctx", "editor" should be valid function.