Raise specialised syntax error for invalid lambda parameters (GH-20776)

1 files changed, 12 insertions, 18 deletions

diff --git a/Lib/test/test_positional_only_arg.py b/Lib/test/test_positional_only_arg.py
index f7bd401..0a9503e 100644
--- a/Lib/test/test_positional_only_arg.py
+++ b/Lib/test/test_positional_only_arg.py
@@ -4,7 +4,7 @@ import dis
 import pickle
 import unittest
 
-from test.support import check_syntax_error, use_old_parser
+from test.support import check_syntax_error
 
 
 def global_pos_only_f(a, b, /):
@@ -23,12 +23,10 @@ class PositionalOnlyTestCase(unittest.TestCase):
             compile(codestr + "\n", "<test>", "single")
 
     def test_invalid_syntax_errors(self):
-        if use_old_parser():
-            check_syntax_error(self, "def f(a, b = 5, /, c): pass", "non-default argument follows default argument")
-            check_syntax_error(self, "def f(a = 5, b, /, c): pass", "non-default argument follows default argument")
-            check_syntax_error(self, "def f(a = 5, b=1, /, c, *, d=2): pass", "non-default argument follows default argument")
-            check_syntax_error(self, "def f(a = 5, b, /): pass", "non-default argument follows default argument")
-
+        check_syntax_error(self, "def f(a, b = 5, /, c): pass", "non-default argument follows default argument")
+        check_syntax_error(self, "def f(a = 5, b, /, c): pass", "non-default argument follows default argument")
+        check_syntax_error(self, "def f(a = 5, b=1, /, c, *, d=2): pass", "non-default argument follows default argument")
+        check_syntax_error(self, "def f(a = 5, b, /): pass", "non-default argument follows default argument")
         check_syntax_error(self, "def f(*args, /): pass")
         check_syntax_error(self, "def f(*args, a, /): pass")
         check_syntax_error(self, "def f(**kwargs, /): pass")
@@ -46,12 +44,10 @@ class PositionalOnlyTestCase(unittest.TestCase):
         check_syntax_error(self, "def f(a, *, c, /, d, e): pass")
 
     def test_invalid_syntax_errors_async(self):
-        if use_old_parser():
-            check_syntax_error(self, "async def f(a, b = 5, /, c): pass", "non-default argument follows default argument")
-            check_syntax_error(self, "async def f(a = 5, b, /, c): pass", "non-default argument follows default argument")
-            check_syntax_error(self, "async def f(a = 5, b=1, /, c, d=2): pass", "non-default argument follows default argument")
-            check_syntax_error(self, "async def f(a = 5, b, /): pass", "non-default argument follows default argument")
-
+        check_syntax_error(self, "async def f(a, b = 5, /, c): pass", "non-default argument follows default argument")
+        check_syntax_error(self, "async def f(a = 5, b, /, c): pass", "non-default argument follows default argument")
+        check_syntax_error(self, "async def f(a = 5, b=1, /, c, d=2): pass", "non-default argument follows default argument")
+        check_syntax_error(self, "async def f(a = 5, b, /): pass", "non-default argument follows default argument")
         check_syntax_error(self, "async def f(*args, /): pass")
         check_syntax_error(self, "async def f(*args, a, /): pass")
         check_syntax_error(self, "async def f(**kwargs, /): pass")
@@ -235,11 +231,9 @@ class PositionalOnlyTestCase(unittest.TestCase):
         self.assertEqual(x(1, 2), 3)
 
     def test_invalid_syntax_lambda(self):
-        if use_old_parser():
-            check_syntax_error(self, "lambda a, b = 5, /, c: None", "non-default argument follows default argument")
-            check_syntax_error(self, "lambda a = 5, b, /, c: None", "non-default argument follows default argument")
-            check_syntax_error(self, "lambda a = 5, b, /: None", "non-default argument follows default argument")
-
+        check_syntax_error(self, "lambda a, b = 5, /, c: None", "non-default argument follows default argument")
+        check_syntax_error(self, "lambda a = 5, b, /, c: None", "non-default argument follows default argument")
+        check_syntax_error(self, "lambda a = 5, b, /: None", "non-default argument follows default argument")
         check_syntax_error(self, "lambda *args, /: None")
         check_syntax_error(self, "lambda *args, a, /: None")
         check_syntax_error(self, "lambda **kwargs, /: None")