Allow bin/rails test task to take absolute paths as arguments

Solves #29923

This regression was caused due to a wrong regex to filter out
paths, introduced in commit 796a1cf0e

The regex was /^\w+\// which did not accept paths with a leading
slash and hence all absolute paths were filtered out.

This change introduces a change in regex which allows for a leading
slash and acts on the matched term accordingly.

While cascading through the case block, the paths are checked for
line number specification, existence of a directory at that path
and if none of those match, then it is considered to be a path to the
file. The regex matchers specified are filtered out via the call
to `Array#compact` since they do not match any of these conditions.

1 files changed, 3 insertions, 3 deletions

diff --git a/railties/lib/rails/test_unit/runner.rb b/railties/lib/rails/test_unit/runner.rb
index 8018ef9d02..33ba2788b4 100644
--- a/railties/lib/rails/test_unit/runner.rb
+++ b/railties/lib/rails/test_unit/runner.rb
@@ -58,7 +58,7 @@ module Rails
 
         private
           def extract_filters(argv)
-            argv.select { |arg| arg =~ /^\w+\// }.map do |path|
+            argv.select { |arg| arg =~ %r{^/?\w+/} }.map do |path|
               case
               when path =~ /(:\d+)+$/
                 file, *lines = path.split(":")
@@ -66,11 +66,11 @@ module Rails
                 file
               when Dir.exist?(path)
                 "#{path}/**/*_test.rb"
-              else
+              when path !~ /\/$/
                 filters << [ path, [] ]
                 path
               end
-            end
+            end.compact
           end
       end
     end