test_in_tail: add test to read root's log file

Signed-off-by: Shizuo Fujita <[email protected]>

Author: Watson1978

test/plugin/test_in_tail.rb

@@ -2648,6 +2648,23 @@ def test_no_warn_with_directory_permission
     end
   end
 
+  def test_other_user_owned_directory
+    omit "Cannot test with root user" if Process::UID.eid == 0
+    omit "NTFS doesn't support UNIX like permissions" if Fluent.windows?
+    path = "/var/log/*.log"
+    begin
+      config = config_element('', '', {
+        'tag' => "tail",
+        'path' => path,
+        'format' => 'none',
+        "pos_file" => "#{@tmp_dir}/tail.pos",
+      })
+      assert_nothing_raised do
+        d = create_driver(config, false)
+      end
+    end
+  end
+
   def test_shutdown_timeout
     Fluent::FileWrapper.open("#{@tmp_dir}/tail.txt", "wb") do |f|
       # Should be large enough to take too long time to consume