181 lines
6.4 KiB
Python
181 lines
6.4 KiB
Python
# -*- coding: UTF-8 -*-
|
|
# pylint: disable=missing-docstring, too-few-public-methods
|
|
"""
|
|
Test the trait-type ``UseEnum``.
|
|
"""
|
|
|
|
import unittest
|
|
import enum
|
|
from ipython_genutils.py3compat import string_types
|
|
from traitlets import HasTraits, TraitError, UseEnum
|
|
|
|
|
|
# -----------------------------------------------------------------------------
|
|
# TEST SUPPORT:
|
|
# -----------------------------------------------------------------------------
|
|
class Color(enum.Enum):
|
|
red = 1
|
|
green = 2
|
|
blue = 3
|
|
yellow = 4
|
|
|
|
class OtherColor(enum.Enum):
|
|
red = 0
|
|
green = 1
|
|
|
|
|
|
# -----------------------------------------------------------------------------
|
|
# TESTSUITE:
|
|
# -----------------------------------------------------------------------------
|
|
class TestUseEnum(unittest.TestCase):
|
|
# pylint: disable=invalid-name
|
|
|
|
class Example(HasTraits):
|
|
color = UseEnum(Color, help="Color enum")
|
|
|
|
def test_assign_enum_value(self):
|
|
example = self.Example()
|
|
example.color = Color.green
|
|
self.assertEqual(example.color, Color.green)
|
|
|
|
def test_assign_all_enum_values(self):
|
|
# pylint: disable=no-member
|
|
enum_values = [value for value in Color.__members__.values()]
|
|
for value in enum_values:
|
|
self.assertIsInstance(value, Color)
|
|
example = self.Example()
|
|
example.color = value
|
|
self.assertEqual(example.color, value)
|
|
self.assertIsInstance(value, Color)
|
|
|
|
def test_assign_enum_value__with_other_enum_raises_error(self):
|
|
example = self.Example()
|
|
with self.assertRaises(TraitError):
|
|
example.color = OtherColor.green
|
|
|
|
def test_assign_enum_name_1(self):
|
|
# -- CONVERT: string => Enum value (item)
|
|
example = self.Example()
|
|
example.color = "red"
|
|
self.assertEqual(example.color, Color.red)
|
|
|
|
def test_assign_enum_value_name(self):
|
|
# -- CONVERT: string => Enum value (item)
|
|
# pylint: disable=no-member
|
|
enum_names = [enum_val.name for enum_val in Color.__members__.values()]
|
|
for value in enum_names:
|
|
self.assertIsInstance(value, string_types)
|
|
example = self.Example()
|
|
enum_value = Color.__members__.get(value)
|
|
example.color = value
|
|
self.assertIs(example.color, enum_value)
|
|
self.assertEqual(example.color.name, value)
|
|
|
|
def test_assign_scoped_enum_value_name(self):
|
|
# -- CONVERT: string => Enum value (item)
|
|
scoped_names = ["Color.red", "Color.green", "Color.blue", "Color.yellow"]
|
|
for value in scoped_names:
|
|
example = self.Example()
|
|
example.color = value
|
|
self.assertIsInstance(example.color, Color)
|
|
self.assertEqual(str(example.color), value)
|
|
|
|
def test_assign_bad_enum_value_name__raises_error(self):
|
|
# -- CONVERT: string => Enum value (item)
|
|
bad_enum_names = ["UNKNOWN_COLOR", "RED", "Green", "blue2"]
|
|
for value in bad_enum_names:
|
|
example = self.Example()
|
|
with self.assertRaises(TraitError):
|
|
example.color = value
|
|
|
|
def test_assign_enum_value_number_1(self):
|
|
# -- CONVERT: number => Enum value (item)
|
|
example = self.Example()
|
|
example.color = 1 # == Color.red.value
|
|
example.color = Color.red.value
|
|
self.assertEqual(example.color, Color.red)
|
|
|
|
def test_assign_enum_value_number(self):
|
|
# -- CONVERT: number => Enum value (item)
|
|
# pylint: disable=no-member
|
|
enum_numbers = [enum_val.value
|
|
for enum_val in Color.__members__.values()]
|
|
for value in enum_numbers:
|
|
self.assertIsInstance(value, int)
|
|
example = self.Example()
|
|
example.color = value
|
|
self.assertIsInstance(example.color, Color)
|
|
self.assertEqual(example.color.value, value)
|
|
|
|
def test_assign_bad_enum_value_number__raises_error(self):
|
|
# -- CONVERT: number => Enum value (item)
|
|
bad_numbers = [-1, 0, 5]
|
|
for value in bad_numbers:
|
|
self.assertIsInstance(value, int)
|
|
assert UseEnum(Color).select_by_number(value, None) is None
|
|
example = self.Example()
|
|
with self.assertRaises(TraitError):
|
|
example.color = value
|
|
|
|
def test_ctor_without_default_value(self):
|
|
# -- IMPLICIT: default_value = Color.red (first enum-value)
|
|
class Example2(HasTraits):
|
|
color = UseEnum(Color)
|
|
|
|
example = Example2()
|
|
self.assertEqual(example.color, Color.red)
|
|
|
|
def test_ctor_with_default_value_as_enum_value(self):
|
|
# -- CONVERT: number => Enum value (item)
|
|
class Example2(HasTraits):
|
|
color = UseEnum(Color, default_value=Color.green)
|
|
|
|
example = Example2()
|
|
self.assertEqual(example.color, Color.green)
|
|
|
|
|
|
def test_ctor_with_default_value_none_and_not_allow_none(self):
|
|
# -- IMPLICIT: default_value = Color.red (first enum-value)
|
|
class Example2(HasTraits):
|
|
color1 = UseEnum(Color, default_value=None, allow_none=False)
|
|
color2 = UseEnum(Color, default_value=None)
|
|
example = Example2()
|
|
self.assertEqual(example.color1, Color.red)
|
|
self.assertEqual(example.color2, Color.red)
|
|
|
|
def test_ctor_with_default_value_none_and_allow_none(self):
|
|
class Example2(HasTraits):
|
|
color1 = UseEnum(Color, default_value=None, allow_none=True)
|
|
color2 = UseEnum(Color, allow_none=True)
|
|
|
|
example = Example2()
|
|
self.assertIs(example.color1, None)
|
|
self.assertIs(example.color2, None)
|
|
|
|
def test_assign_none_without_allow_none_resets_to_default_value(self):
|
|
class Example2(HasTraits):
|
|
color1 = UseEnum(Color, allow_none=False)
|
|
color2 = UseEnum(Color)
|
|
|
|
example = Example2()
|
|
example.color1 = None
|
|
example.color2 = None
|
|
self.assertIs(example.color1, Color.red)
|
|
self.assertIs(example.color2, Color.red)
|
|
|
|
def test_assign_none_to_enum_or_none(self):
|
|
class Example2(HasTraits):
|
|
color = UseEnum(Color, allow_none=True)
|
|
|
|
example = Example2()
|
|
example.color = None
|
|
self.assertIs(example.color, None)
|
|
|
|
def test_assign_bad_value_with_to_enum_or_none(self):
|
|
class Example2(HasTraits):
|
|
color = UseEnum(Color, allow_none=True)
|
|
|
|
example = Example2()
|
|
with self.assertRaises(TraitError):
|
|
example.color = "BAD_VALUE"
|
|
|