2010-05-03 Dirk Pranke <dpranke@chromium.org>

2010-05-03  Dirk Pranke  <dpranke@chromium.org>

        Reviewed by Eric Seidel.

        new-run-webkit-tests: refactor a large chunk of the printing/logging
        code out of run-webkit-tests py (almost 300 lines out of 1900).

        This change also renames --log to --print (to be slightly more
        descriptive). I've also added better help messages for printing.

        The new code has unit tests!

        There is still more code to be moved, but this patch is big enough as
        it is. Namely, still to move are the printing of the actual results
        and the timing statistics, which should move another 300-400 lines
        out of the file.

        Notable changes to run_webkit_tests.py beyond code simply moving:
        * MeteredStream is now hidden under the new printing.Printer class.
          All the references to self._meter now point to self._printer.
        * All logging configuration is done in printing.configure_logging()
        * Instead of using write() lambdas to control what is and isn't
          printed, we use separate methods on the printer object. This will
          make it easier to grep which print statements are printed
          under protection of each flag.
        * The print_results flag I added a few revs back to suppress printing
          in the unit tests has been replaced with --print nothing.
        * The ResultSummary class now stores the entire TestResult for each
          test, not just the actual result type.
        * summarize_unexpected_results() got moved from a method on TestRunner
          to a standalone function. This should move into a separate file
          along with the ResultSummary class and the TestResult class
        * The --trace option added recently has been replaced by
          '--print trace-everything' and '--print trace-unexpected'

        https://bugs.webkit.org/show_bug.cgi?id=38018

        * Scripts/new-run-webkit-tests:
          - update to new entry points in run_webkit_tests.py
        * Scripts/webkitpy/layout_tests/layout_package/metered_stream.py:
          - fix a minor nit where we were printing an empty string where
            we didn't need to
        * Scripts/webkitpy/layout_tests/layout_package/printing.py: Added.
        * Scripts/webkitpy/layout_tests/layout_package/printing_unittest.py: Added
        * Scripts/webkitpy/layout_tests/port/test.py:
          - implement relative_test_filename() and expected_filename() so
            we can test printing unexpected results in a platform-neutral
            way
        * Scripts/webkitpy/run_webkit_test.py:
          - move a lot of the printing code into printing.py
          - change the signatures of the exported entry points for easier
            unit testing
        * Scripts/webkitpy/run_webkit_tests_unittest.py:
          - update w/ changes to run_webkit_tests entry points.

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@58728 268f45cc-cd09-0410-ab3c-d52691b4dbfc