Added a guard that gives a better error message.

bendyworks · Nov 8, 2009 · 3e80324 · 3e80324
1 parent cc3abba
commit 3e80324
Showing 1 changed file with 1 addition and 0 deletions.
diff --git a/lib/cucumber/ast/tags.rb b/lib/cucumber/ast/tags.rb
@@ -13,6 +13,7 @@ class Tags #:nodoc:
 
       class And #:nodoc:
         def initialize(tag_names)
+          raise "tag_names was #{tag_names.inspect} (#{tag_names.class}) - expected it to be Array" unless Array === tag_names
           @negative_tags, @positive_tags = tag_names.partition{|tag_name| Tags.exclude_tag?(tag_name)}
           @negative_tags = Tags.strip_negative_char(@negative_tags)
         end