fix style, run tests only on 3.8+

Author: timfel

graalpython/com.oracle.graal.python.test/src/com/oracle/graal/python/test/parser/AssignmentTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2019, 2020, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * The Universal Permissive License (UPL), Version 1.0

graalpython/com.oracle.graal.python.test/src/tests/test_parser.py

@@ -130,29 +130,31 @@ def foo(object: object):
 
 
 def test_cannot_assign():
-    def assert_raise(s, msg):
-        try:
-            compile("%s = 1" % s, "", "single")
-        except SyntaxError as e:
-            assert msg in str(e), str(e)
-        else:
-            assert False
-        try:
-            compile("with foo as %s:\n pass" % s, "", "single")
-        except SyntaxError as e:
-            assert msg in str(e), str(e)
-        else:
-            assert False
-    assert_raise("None", "cannot assign to None")
-    assert_raise("1", "cannot assign to literal")
-    assert_raise("1.1", "cannot assign to literal")
-    assert_raise("{1}", "cannot assign to set display")
-    assert_raise("{1: 2}", "cannot assign to dict display")
-    assert_raise("1.2j", "cannot assign to literal")
-    assert_raise("...", "cannot assign to Ellipsis")
-    assert_raise("True", "cannot assign to True")
-    assert_raise("False", "cannot assign to False")
-    assert_raise("b''", "cannot assign to literal")
-    assert_raise("''", "cannot assign to literal")
-    assert_raise("f''", "cannot assign to f-string expression")
-    assert_raise("(None,)", "cannot assign to None")
+    import sys
+    if sys.implementation.version.minor >= 8:
+        def assert_raise(s, msg):
+            try:
+                compile("%s = 1" % s, "", "single")
+            except SyntaxError as e:
+                assert msg in str(e), str(e)
+            else:
+                assert False
+            try:
+                compile("with foo as %s:\n pass" % s, "", "single")
+            except SyntaxError as e:
+                assert msg in str(e), str(e)
+            else:
+                assert False
+        assert_raise("None", "cannot assign to None")
+        assert_raise("1", "cannot assign to literal")
+        assert_raise("1.1", "cannot assign to literal")
+        assert_raise("{1}", "cannot assign to set display")
+        assert_raise("{1: 2}", "cannot assign to dict display")
+        assert_raise("1.2j", "cannot assign to literal")
+        assert_raise("...", "cannot assign to Ellipsis")
+        assert_raise("True", "cannot assign to True")
+        assert_raise("False", "cannot assign to False")
+        assert_raise("b''", "cannot assign to literal")
+        assert_raise("''", "cannot assign to literal")
+        assert_raise("f''", "cannot assign to f-string expression")
+        assert_raise("(None,)", "cannot assign to None")