Add failing test for issue #27.

neogeny · Jun 11, 2017 · 825ffde · 825ffde
1 parent 192c6e8
commit 825ffde
Showing 1 changed file with 15 additions and 0 deletions.
diff --git a/test/grammar/left_recursion_test.py b/test/grammar/left_recursion_test.py
@@ -215,3 +215,18 @@ def test_left_recursion_with_right_associativity(self, trace=False):
         model = compile(grammar, "test")
         ast = model.parse("1+2+3", trace=trace, colorize=True)
         self.assertEqual(['1', '+', ['2', '+', '3']], ast)
+
+    def test_dropped_input_bug(self, trace=False):
+        grammar = '''
+            @@left_recursion :: True
+            identifier = /\w+/ ;
+            expr = expr ',' expr | identifier ;
+        '''
+        model = compile(grammar)
+
+        ast = model.parse('foo', 'expr', trace=trace, colorize=True)
+        self.assertEqual(ast, 'foo')
+        ast = model.parse('foo, bar', 'expr', trace=trace, colorize=True)
+        self.assertEqual(ast, ['foo', ',', 'bar'])
+        ast = model.parse('foo bar', 'expr', trace=trace, colorize=True)
+        self.assertEqual(ast, 'foo')