spec/spec_helper.rb in gisele-0.3.0 vs spec/spec_helper.rb in gisele-0.4.0

@@ -18,18 +18,26 @@
     grammar = Gisele::Language::Syntax::Grammar
     grammar.parse(text, :root => rule, :consume => consume)
   end
 
   def ast(text, rule, consume = true)
-    parse(text, rule, consume).to_ast
+    ast = parse(text, rule, consume).to_ast
+    unless sexp_grammar[rule] === ast
+      raise "expected #{ast} to match #{rule} (#{text})"
+    end
+    ast
   end
 
   def fixtures_dir
     (Path.dir/:fixtures)
   end
 
   def fixture_files(glob)
     fixtures_dir.glob(glob)
+  end
+
+  def sexp_grammar
+    Gisele::Language::SEXP_GRAMMAR
   end
 
   def simple_ast
     Gisele::ast(fixtures_dir/:tasks/"simple.gis")
   end
\ No newline at end of file