bpo-38659: [Enum] add _simple_enum decorator (GH-25497)
add:
* `_simple_enum` decorator to transform a normal class into an enum
* `_test_simple_enum` function to compare
* `_old_convert_` to enable checking `_convert_` generated enums
`_simple_enum` takes a normal class and converts it into an enum:
@simple_enum(Enum)
class Color:
RED = 1
GREEN = 2
BLUE = 3
`_old_convert_` works much like` _convert_` does, using the original logic:
# in a test file
import socket, enum
CheckedAddressFamily = enum._old_convert_(
enum.IntEnum, 'AddressFamily', 'socket',
lambda C: C.isupper() and C.startswith('AF_'),
source=_socket,
)
`_test_simple_enum` takes a traditional enum and a simple enum and
compares the two:
# in the REPL or the same module as Color
class CheckedColor(Enum):
RED = 1
GREEN = 2
BLUE = 3
_test_simple_enum(CheckedColor, Color)
_test_simple_enum(CheckedAddressFamily, socket.AddressFamily)
Any important differences will raise a TypeErrordiff --git a/Lib/test/test_unicode.py b/Lib/test/test_unicode.py
index d47cf28..0e6cbb6 100644
--- a/Lib/test/test_unicode.py
+++ b/Lib/test/test_unicode.py
@@ -1463,20 +1463,21 @@ class Float(float, enum.Enum):
PI = 3.1415926
class Int(enum.IntEnum):
IDES = 15
- class Str(str, enum.Enum):
+ class Str(enum.StrEnum):
+ # StrEnum uses the value and not the name for %s etc.
ABC = 'abc'
# Testing Unicode formatting strings...
self.assertEqual("%s, %s" % (Str.ABC, Str.ABC),
- 'ABC, ABC')
+ 'abc, abc')
self.assertEqual("%s, %s, %d, %i, %u, %f, %5.2f" %
(Str.ABC, Str.ABC,
Int.IDES, Int.IDES, Int.IDES,
Float.PI, Float.PI),
- 'ABC, ABC, 15, 15, 15, 3.141593, 3.14')
+ 'abc, abc, 15, 15, 15, 3.141593, 3.14')
# formatting jobs delegated from the string implementation:
self.assertEqual('...%(foo)s...' % {'foo':Str.ABC},
- '...ABC...')
+ '...abc...')
self.assertEqual('...%(foo)s...' % {'foo':Int.IDES},
'...IDES...')
self.assertEqual('...%(foo)i...' % {'foo':Int.IDES},