Improve test runner's Minitest integration.

This also adds free mix and matching of directories, files and lines filters.
Like so:

bin/rails test models/post_test.rb test/integration models/person_test.rb:26

You can also mix in a traditional Minitest filter:

bin/rails test test/integration -n /check_it_out/

1 files changed, 5 insertions, 1 deletions

diff --git a/railties/lib/rails/test_unit/reporter.rb b/railties/lib/rails/test_unit/reporter.rb
index 64e99626eb..bfdc9754d4 100644
--- a/railties/lib/rails/test_unit/reporter.rb
+++ b/railties/lib/rails/test_unit/reporter.rb
@@ -15,8 +15,12 @@ module Rails
       filtered_results.reject!(&:skipped?) unless options[:verbose]
       filtered_results.map do |result|
         location, line = result.method(result.name).source_location
-        "bin/rails test #{location}:#{line}"
+        "bin/rails test #{relative_path_for(location)}:#{line}"
       end.join "\n"
     end
+
+    def relative_path_for(file)
+      file.sub(/^#{Rails.root}\/?/, '')
+    end
   end
 end