Match evented checker behavior on dir with no exts

When FileUpdateChecker is passed a directory and given an empty array of
extensions to match on, it will match any extension.

Previously, EventedFileUpdateChecker would never match any files when
given an empty array. This commit makes it EventedFileUpdateChecker
match FileUpdateChecker, and watch all extensions when given an empty
array.

1 files changed, 12 insertions, 0 deletions

diff --git a/activesupport/test/file_update_checker_shared_tests.rb b/activesupport/test/file_update_checker_shared_tests.rb
index 72683816b3..84d89fa0a7 100644
--- a/activesupport/test/file_update_checker_shared_tests.rb
+++ b/activesupport/test/file_update_checker_shared_tests.rb
@@ -186,6 +186,18 @@ module FileUpdateCheckerSharedTests
     assert_equal 1, i
   end
 
+  test "should execute the block if files change in a watched directory any extensions" do
+    i = 0
+
+    checker = new_checker([], tmpdir => []) { i += 1 }
+
+    touch(tmpfile("foo.rb"))
+    wait
+
+    assert checker.execute_if_updated
+    assert_equal 1, i
+  end
+
   test "should execute the block if files change in a watched directory several extensions" do
     i = 0