Update test_coroutines for reserved keywords

Author: slozier

src/core/IronPython.StdLib/lib/test/test_coroutines.py

@@ -394,20 +394,17 @@ def async(): pass
         ]
 
         for code in samples:
-            with self.subTest(code=code), self.assertWarnsRegex(
-                    DeprecationWarning,
-                    "'await' will become reserved keywords"):
+            # ironpython: async/await are reserved keywords
+            with self.subTest(code=code), self.assertRaises(SyntaxError):
                 compile(code, "<test>", "exec")
 
     def test_badsyntax_3(self):
-        with self.assertRaises(DeprecationWarning):
-            with warnings.catch_warnings():
-                warnings.simplefilter("error")
-                compile("async = 1", "<test>", "exec")
-
-    def test_goodsyntax_1(self):
-        # Tests for issue 24619
+        # ironpython: async/await are reserved keywords
+        with self.assertRaises(SyntaxError):
+            compile("async = 1", "<test>", "exec")
 
+    # ironpython: async/await are reserved keywords
+    def test_badsyntax_4(self):
         samples = [
             '''def foo(await):
                 async def foo(): pass
@@ -454,14 +451,9 @@ async def bar(): return await_
         ]
 
         for code in samples:
-            with self.subTest(code=code):
-                loc = {}
-
-                with warnings.catch_warnings():
-                    warnings.simplefilter("ignore")
-                    exec(code, loc, loc)
-
-                self.assertEqual(loc['foo'](10), 11)
+            # ironpython: async/await are reserved keywords
+            with self.subTest(code=code), self.assertRaises(SyntaxError):
+                compile(code, "<test>", "exec")
 
 
 class TokenizerRegrTest(unittest.TestCase):