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Current File : /opt/alt/python36/lib64/python3.6/test//test_opcodes.py
# 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, 6)
        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()

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