def compare_different_value_objects():
from vo import Value
book_ddd = Value(title='DDD', author='Pythonista', price=120.44, currency='USD')
book_tdd = Value(title='TDD', author='Life', price=99.98, currency='USD')
assert book_ddd != book_tdd
return
def compare_similar_value_objects():
from vo import Value
book_ddd = Value(title='DDD', author='Pythonista', price=120.44, currency='USD')
book_clone = Value(title='DDD', author='Pythonista', price=120.44, currency='USD')
assert book_ddd == book_clone
assert book_ddd is not book_clone
return
def dump_to_json():
from vo import Value
book = Value(title='DDD', author='Pythonista', price=120.44, currency='USD')
dump = book.to_json()
assert isinstance(dump, str)
assert dump == '{"author": "Pythonista", "currency": "USD", ' \
'"price": 120.44, "title": "DDD"}'
return
def dump_to_dict():
from vo import Value
book = Value(title='DDD', author='Pythonista', price=120.44, currency='USD')
dump = book.to_dict()
assert isinstance(dump, OrderedDict)
assert dump == OrderedDict([('author', 'Pythonista'), ('currency', 'USD'),
('price', 120.44), ('title', 'DDD')])
return
def test_to_json(self):
truthy_cases = (
(Value(title='some value'), {
'title': 'some value'
}),
(Value(title='value',
aaa='A!'), OrderedDict([('aaa', 'A!'),
('title', 'value')])),
(Value(number=123,
empty=None), OrderedDict([('empty', None),
('number', 123)])),
(Value(number=Value(val=Value(v=150))),
OrderedDict([
('number', OrderedDict([
('val', OrderedDict([('v', 150)])),
])),
])),
)
falsy_cases = (
(Value(title='some value'), {
'title': 'any value'
}),
(Value(number=123), OrderedDict([('empty', None),
('number', 123)])),
(Value(number=123,
empty=None), OrderedDict([('number', 123),
('empty', None)])),
)
for truthy, falsy in zip_longest(truthy_cases, falsy_cases):
if truthy is not None:
self.assertEqual(truthy[0].to_json(), json.dumps(truthy[1]))
if falsy is not None:
self.assertNotEqual(falsy[0].to_json(), json.dumps(falsy[1]))
def test_raise_on_change_existing_attribute(self):
value = Value(title='some title', test=False)
with self.assertRaises(ImmutableInstanceError):
value.title = 'ha!'
with self.assertRaises(ImmutableInstanceError):
setattr(value, 'test', 'YES!')
with self.assertRaises(ImmutableInstanceError):
value['_checksum'] = 1234
def test_raise_on_adding_new_attribute(self):
value = Value()
with self.assertRaises(ImmutableInstanceError):
value.new_attr = 'ha!'
with self.assertRaises(ImmutableInstanceError):
setattr(value, 'old_one', 'I am so old')
with self.assertRaises(ImmutableInstanceError):
value['some_attr'] = 1234
def test_create_vo_with_attributes(self):
value = Value(string='test string',
integer=10,
floating=2.3,
items=[1, 2, 3],
dictionary={'test': True},
boolean=True,
empty=None)
self.assertEqual(value.string, 'test string')
self.assertEqual(value.integer, 10)
self.assertEqual(value.floating, 2.3)
self.assertListEqual(value.items, [1, 2, 3])
self.assertDictEqual(value.dictionary, {'test': True})
self.assertEqual(value.boolean, True)
self.assertIsNone(value.empty)
self.assertEqual(value['string'], 'test string')
self.assertEqual(value['integer'], 10)
self.assertEqual(value['floating'], 2.3)
self.assertListEqual(value['items'], [1, 2, 3])
self.assertDictEqual(value['dictionary'], {'test': True})
self.assertEqual(value['boolean'], True)
self.assertIsNone(value['empty'])
self.assertIs(value['string'], value.string)
self.assertIs(value['integer'], value.integer)
self.assertIs(value['floating'], value.floating)
self.assertIs(value['items'], value.items)
self.assertIs(value['dictionary'], value.dictionary)
self.assertIs(value['boolean'], value.boolean)
self.assertIs(value['empty'], value.empty)
def check_property_existence():
from vo import Value
book = Value(title='DDD', author='Pythonista', price=120.44, currency='USD')
assert 'title' in book
assert 'publisher' not in book
def property_modification_forbidden():
from vo import Value
book = Value(title='DDD',
author='Pythonista',
price=120.44,
currency='USD')
all_good = True
try:
book.title = 'BDD > DDD' # or book['title'] = 'SPAM'
except ImmutableInstanceError:
all_good = False
assert all_good is False
assert book.title == 'DDD'
return
def adding_new_property_forbidden():
from vo import Value
book = Value(title='DDD',
author='Pythonista',
price=120.44,
currency='USD')
all_good = True
try:
book.publisher = 'SPAM' # or book['publisher'] = 'SPAM'
except ImmutableInstanceError:
all_good = False
assert all_good is False
assert 'publisher' not in book
return
def access_value_properties():
from vo import Value
book = Value(title='DDD', author='Pythonista', price=120.44, currency='USD')
assert book.title == 'DDD'
assert book.author == book['author']
assert book['price'] == 120.44
return
def test_repr(self):
truthy_cases = (
(Value(text='first'), "Value(text='first')"),
(Value(is_true=True,
boolean=False), "Value(boolean=False, is_true=True)"),
)
falsy_cases = (
(Value(is_true=True,
boolean=False), "Value(is_true=True, boolean=False)"),
(Value(first=123), "Value(first='123')"),
)
for truthy, falsy in zip_longest(truthy_cases, falsy_cases):
if truthy is not None:
self.assertEqual(str(repr(truthy[0])), truthy[1])
if falsy is not None:
self.assertNotEqual(str(repr(truthy[0])), falsy[1])
def test_raise_on_delete_attribute(self):
value = Value(title='some title', test=False)
with self.assertRaises(ImmutableInstanceError):
del value.title
with self.assertRaises(ImmutableInstanceError):
delattr(value, 'test')
with self.assertRaises(ImmutableInstanceError):
del value['_checksum']
def test_if_attribute_is_in_value(self):
truthy_cases = (
('title', Value(title='test val')),
('number', Value(number=123)),
('test', Value(title='test val', test=True)),
('lang', Value(lang='python')),
('_checksum', Value(lang='python')),
)
falsy_cases = (
('java', Value()),
('test', Value(title='foo')),
('empty', Value(full='om nomnom')),
(123, Value(number=123)),
('checksum', Value(full='om nomnom')),
)
for truthy, falsy in zip_longest(truthy_cases, falsy_cases):
if truthy is not None:
self.assertIn(truthy[0], truthy[1])
if falsy is not None:
self.assertNotIn(falsy[0], falsy[1])
def property_deletion_forbidden():
from vo import Value
book = Value(title='DDD',
author='Pythonista',
price=120.44,
currency='USD')
all_good = True
try:
del book.title # or del book['title']
except ImmutableInstanceError:
all_good = False
assert all_good is False
assert 'title' in book
return
def test_str(self):
cases = (
Value(title='some value'),
Value(title='some value', aaa='A!'),
Value(number=123, empty=None),
Value(number=123.1234, boolean=False),
Value(collection=[2, 2, 2]),
Value(dictionary={
'val': 123,
'what?': 'foo'
}),
)
for case in cases:
self.assertEqual(str(case), case.to_json())
def test_to_dict(self):
truthy_cases = (
(Value(title='some value'), {
'title': 'some value'
}),
(Value(title='value',
aaa='A!'), OrderedDict([('aaa', 'A!'),
('title', 'value')])),
(Value(number=123, empty=None), {
'empty': None,
'number': 123
}),
(Value(number=123,
empty=None), OrderedDict([('empty', None),
('number', 123)])),
(Value(number=Value(val=130)),
OrderedDict([('number', OrderedDict([('val', 130)]))])),
(Value(number=Value(val=Value(v=150))),
OrderedDict([
('number', OrderedDict([('val', OrderedDict([('v', 150)]))]))
])),
(Value(c=2, a=1, b=Value(e=3, d=Value(f=4, g=5))),
OrderedDict([
('a', 1),
('b',
OrderedDict([
('d', OrderedDict([
('f', 4),
('g', 5),
])),
('e', 3),
])),
('c', 2),
])),
)
falsy_cases = (
(Value(number=123), OrderedDict([('empty', None),
('number', 123)])),
(Value(number=123,
empty=None), OrderedDict([('number', 123),
('empty', None)])),
(Value(number=123, empty=None), {
'empty': True,
'number': 123
}),
(Value(title='some value'), {
'title': 'any value'
}),
(Value(c=2, a=1, b=Value(e=3, d=Value(f=4, g=5))),
OrderedDict([
('a', 1),
('c', 2),
('b',
OrderedDict([
('d', OrderedDict([
('g', 5),
('f', 4),
])),
('e', 3),
])),
])),
)
for truthy, falsy in zip_longest(truthy_cases, falsy_cases):
if truthy is not None:
self.assertEqual(truthy[0].to_dict(), truthy[1])
if falsy is not None:
self.assertNotEqual(falsy[0].to_dict(), falsy[1])
def create_plain_value_object():
from vo import Value
book_ddd = Value(title='DDD', author='Pythonista', price=120.44, currency='USD')
book_tdd = Value(title='TDD', author='Life', price=99.98, currency='USD')
return book_ddd, book_tdd
def test_create_empty_vo(self):
value = Value()
self.assertIsInstance(value, Value)
def test_to_bytes(self):
truthy_cases = (
(Value(title='some value'), b'\'{"title": "some value"}\''),
(Value(title='some value',
aaa='A!'), b'\'{"aaa": "A!", "title": "some value"}\''),
(Value(test=True,
empty=None), b'\'{"empty": null, "test": true}\''),
(Value(number=Value(val=130)), b'\'{"number": {"val": 130}}\''),
(Value(number=Value(val=Value(v=150))),
b'\'{"number": {"val": {"v": 150}}}\''),
(Value(c=2, a=1, b=Value(e=3, d=Value(f=4, g=5))),
b'\'{"a": 1, "b": {"d": {"f": 4, "g": 5}, "e": 3}, "c": 2}\''))
falsy_cases = (
(Value(number=123,
empty=None), b'\'{"empty": true, "number": 123}\''),
(Value(title='some value'), b'\'{"title": "any value"}\''),
)
for truthy, falsy in zip_longest(truthy_cases, falsy_cases):
if truthy is not None:
self.assertEqual(truthy[0].to_bytes(), truthy[1])
if falsy is not None:
self.assertNotEqual(falsy[0].to_bytes(), falsy[1])
def test_compare_two_values(self):
truthy_cases = (
(Value(title='Test case'), Value(title='Test case')),
(Value(title='Test case',
test=True), Value(title='Test case', test=True)),
(Value(test=12), Value(test=12)),
(Value(), Value()),
(Value(d={
'first': 1,
'two': 2
}), Value(d={
'first': 1,
'two': 2
})),
(Value(v=Value(test=1)), Value(v=Value(test=1))),
(Value(number=123.1), Value(number=123.1)),
(Value(collection={1, 2, 3}), Value(collection={1, 2, 3})),
)
falsy_cases = (
(Value(v=Value(test=1)), Value(v=Value(test=2))),
(Value(title='Test case', test=True), Value(title='Test case')),
(Value(title='Test cases'), Value(title='Test case')),
(Value(num=1), Value(nu=1)),
(Value(num=1), 1),
(Value(num=1), {
'num': 1
}),
(Value(v={1, 2, 3}), {1, 2, 3}),
(Value(text='test'), 'Value(text=\'test\')'),
)
for truthy, falsy in zip_longest(truthy_cases, falsy_cases):
if truthy is not None:
self.assertEqual(truthy[0], truthy[1])
if falsy is not None:
self.assertNotEqual(falsy[0], falsy[1])