Debug: More inspections

Author: nobu

test/rubygems/test_gem_command_manager.rb

@@ -80,6 +80,9 @@ def test_find_command_unknown_suggestions
     message = "Unknown command pish".dup
 
     if defined?(DidYouMean)
+      assert_operator Gem::UnknownCommandError, :<, DidYouMean::Correctable
+      assert_operator Gem::UnknownCommandError, :instance_variable_defined?, :@attached
+      assert_send [Gem::UnknownCommandError, :instance_variable_get, :@attached]
       message << "\nDid you mean?  \"push\""
     end
 
@@ -90,10 +93,10 @@ def test_find_command_unknown_suggestions
     end
 
     assert_equal message, actual_message, proc {|msg|
-      msg + {
-         unknown_command: e.unknown_command,
-        spell_checker: e.spell_checker,
-        corrections: e.corrections,
+      (msg || "") + {
+        unknown_command: e.unknown_command,
+        spell_checker: (e.spell_checker rescue nil),
+        corrections: (e.corrections rescue nil),
       }.pretty_inspect
     }
   end