https-github-com-nzysoft
diff --git a/‎Lib/test/test_peg_generator/test_pegen.py‎
Lines changed: 8 additions & 8 deletions b/‎Lib/test/test_peg_generator/test_pegen.py‎
Lines changed: 8 additions & 8 deletions
@@ -15,6 +15,7 @@
     from pegen.grammar import GrammarVisitor, GrammarError, Grammar
     from pegen.grammar_visualizer import ASTGrammarPrinter
     from pegen.parser import Parser
+    from pegen.parser_generator import compute_nullables, compute_left_recursives
     from pegen.python_generator import PythonParserGenerator
 
 
@@ -502,23 +503,22 @@ def test_nullable(self) -> None:
         sign: ['-' | '+']
         """
         grammar: Grammar = parse_string(grammar_source, GrammarParser)
-        out = io.StringIO()
-        genr = PythonParserGenerator(grammar, out)
         rules = grammar.rules
-        self.assertFalse(rules["start"].nullable)  # Not None!
-        self.assertTrue(rules["sign"].nullable)
+        nullables = compute_nullables(rules)
+        self.assertNotIn(rules["start"], nullables)  # Not None!
+        self.assertIn(rules["sign"], nullables)
 
     def test_advanced_left_recursive(self) -> None:
         grammar_source = """
         start: NUMBER | sign start
         sign: ['-']
         """
         grammar: Grammar = parse_string(grammar_source, GrammarParser)
-        out = io.StringIO()
-        genr = PythonParserGenerator(grammar, out)
         rules = grammar.rules
-        self.assertFalse(rules["start"].nullable)  # Not None!
-        self.assertTrue(rules["sign"].nullable)
+        nullables = compute_nullables(rules)
+        compute_left_recursives(rules)
+        self.assertNotIn(rules["start"], nullables)  # Not None!
+        self.assertIn(rules["sign"], nullables)
         self.assertTrue(rules["start"].left_recursive)
         self.assertFalse(rules["sign"].left_recursive)