Add test_opcodes from CPython 3.8

Author: palaviv

Lib/test/test_opcodes.py

@@ -0,0 +1,138 @@
+# Python test set -- part 2, opcodes
+
+import unittest
+from test import ann_module, support
+
+class OpcodeTest(unittest.TestCase):
+
+    def test_try_inside_for_loop(self):
+        n = 0
+        for i in range(10):
+            n = n+i
+            try: 1/0
+            except NameError: pass
+            except ZeroDivisionError: pass
+            except TypeError: pass
+            try: pass
+            except: pass
+            try: pass
+            finally: pass
+            n = n+i
+        if n != 90:
+            self.fail('try inside for')
+
+    def test_setup_annotations_line(self):
+        # check that SETUP_ANNOTATIONS does not create spurious line numbers
+        try:
+            with open(ann_module.__file__) as f:
+                txt = f.read()
+            co = compile(txt, ann_module.__file__, 'exec')
+            self.assertEqual(co.co_firstlineno, 3)
+        except OSError:
+            pass
+
+    def test_no_annotations_if_not_needed(self):
+        class C: pass
+        with self.assertRaises(AttributeError):
+            C.__annotations__
+
+    def test_use_existing_annotations(self):
+        ns = {'__annotations__': {1: 2}}
+        exec('x: int', ns)
+        self.assertEqual(ns['__annotations__'], {'x': int, 1: 2})
+
+    def test_do_not_recreate_annotations(self):
+        # Don't rely on the existence of the '__annotations__' global.
+        with support.swap_item(globals(), '__annotations__', {}):
+            del globals()['__annotations__']
+            class C:
+                del __annotations__
+                with self.assertRaises(NameError):
+                    x: int
+
+    def test_raise_class_exceptions(self):
+
+        class AClass(Exception): pass
+        class BClass(AClass): pass
+        class CClass(Exception): pass
+        class DClass(AClass):
+            def __init__(self, ignore):
+                pass
+
+        try: raise AClass()
+        except: pass
+
+        try: raise AClass()
+        except AClass: pass
+
+        try: raise BClass()
+        except AClass: pass
+
+        try: raise BClass()
+        except CClass: self.fail()
+        except: pass
+
+        a = AClass()
+        b = BClass()
+
+        try:
+            raise b
+        except AClass as v:
+            self.assertEqual(v, b)
+        else:
+            self.fail("no exception")
+
+        # not enough arguments
+        ##try:  raise BClass, a
+        ##except TypeError: pass
+        ##else: self.fail("no exception")
+
+        try:  raise DClass(a)
+        except DClass as v:
+            self.assertIsInstance(v, DClass)
+        else:
+            self.fail("no exception")
+
+    def test_compare_function_objects(self):
+
+        f = eval('lambda: None')
+        g = eval('lambda: None')
+        self.assertNotEqual(f, g)
+
+        f = eval('lambda a: a')
+        g = eval('lambda a: a')
+        self.assertNotEqual(f, g)
+
+        f = eval('lambda a=1: a')
+        g = eval('lambda a=1: a')
+        self.assertNotEqual(f, g)
+
+        f = eval('lambda: 0')
+        g = eval('lambda: 1')
+        self.assertNotEqual(f, g)
+
+        f = eval('lambda: None')
+        g = eval('lambda a: None')
+        self.assertNotEqual(f, g)
+
+        f = eval('lambda a: None')
+        g = eval('lambda b: None')
+        self.assertNotEqual(f, g)
+
+        f = eval('lambda a: None')
+        g = eval('lambda a=None: None')
+        self.assertNotEqual(f, g)
+
+        f = eval('lambda a=0: None')
+        g = eval('lambda a=1: None')
+        self.assertNotEqual(f, g)
+
+    def test_modulo_of_string_subclasses(self):
+        class MyString(str):
+            def __mod__(self, value):
+                return 42
+        self.assertEqual(MyString() % 3, 42)
+
+
+if __name__ == '__main__':
+    unittest.main()