Forward test.

eerimoq · Jul 22, 2018 · 20dcb51 · 20dcb51
1 parent 20d146c
commit 20dcb51
Showing 1 changed file with 14 additions and 0 deletions.
diff --git a/tests/test_textparser.py b/tests/test_textparser.py
@@ -14,6 +14,7 @@
 from textparser import create_token_re
 from textparser import Any
 from textparser import Inline
+from textparser import Forward
 
 
 def tokenize(items):
@@ -287,6 +288,19 @@ def test_1(self):
             tree = grammar.parse(tokenize(tokens + [('__EOF__', '')]))
             self.assertEqual(tree, expected_tree)
 
+    def test_forward(self):
+        foo = Forward()
+        foo <<= Sequence('FOO')
+        grammar = Grammar(foo)
+
+        datas = [
+            ([('FOO', 'foo')], ['foo'])
+        ]
+
+        for tokens, expected_tree in datas:
+            tree = grammar.parse(tokenize(tokens + [('__EOF__', '')]))
+            self.assertEqual(tree, expected_tree)
+
 
 if __name__ == '__main__':
     unittest.main()