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# typedload
# Copyright (C) 2018-2024 Salvo "LtWorf" Tomaselli
#
# typedload is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# author Salvo "LtWorf" Tomaselli <tiposchi@tiscali.it>
from dataclasses import dataclass, field
from enum import Enum
from typing import Dict, List, NamedTuple, Optional, Set, Tuple, Union
import unittest
import sys
from typedload import dataloader, load, dump, typechecks, exceptions
class TestDataclassLoad(unittest.TestCase):
def test_do_not_init(self):
@dataclass
class Q:
a: int
b: int
c: int = field(init=False)
def __post_init__(self):
self.c = self.a + self.b
assert typechecks.is_dataclass(Q)
assert load({'a': 1, 'b': 2}, Q).c == 3
a = load({'a': 12, 'b': 30}, Q)
assert a.c == 42
a.c = 1
assert a.c == 1
assert a.a == 12
assert a.b == 30
def test_missing(self):
@dataclass
class A:
a: int
with self.assertRaises(TypeError):
load({}, A)
def test_is_dataclass(self):
@dataclass
class A:
pass
class B(NamedTuple):
pass
assert typechecks.is_dataclass(A)
assert not typechecks.is_dataclass(List[int])
assert not typechecks.is_dataclass(Tuple[int, int])
assert not typechecks.is_dataclass(B)
def test_factory_load(self):
@dataclass
class A:
a: List[int] = field(default_factory=list)
assert load({'a': [1, 2, 3]}, A) == A([1, 2, 3])
assert load({'a': []}, A) == A()
assert load({}, A) == A()
def test_load(self):
@dataclass
class A:
a: int
b: str
assert load({'a': 101, 'b': 'ciao'}, A) == A(101, 'ciao')
if sys.version_info.minor >= 10:
def test_loadslotted(self):
@dataclass(slots=True)
class A:
a: int
assert load({'a': 1}, A) == A(1)
def test_nestedload(self):
@dataclass
class A:
a: int
b: str
@dataclass
class B:
a: A
b: List[A]
assert load({'a': {'a': 101, 'b': 'ciao'}, 'b': []}, B) == B(A(101, 'ciao'), [])
assert load(
{'a': {'a': 101, 'b': 'ciao'}, 'b': [{'a': 1, 'b': 'a'},{'a': 0, 'b': 'b'}]},
B
) == B(A(101, 'ciao'), [A(1, 'a'),A(0, 'b')])
def test_defaultvalue(self):
@dataclass
class A:
a: int
b: Optional[str] = None
assert load({'a': 1}, A) == A(1)
assert load({'a': 1, 'b': 'io'}, A) == A(1, 'io')
class TestDataclassUnion(unittest.TestCase):
def test_ComplicatedUnion(self):
@dataclass
class A:
a: int
@dataclass
class B:
a: str
@dataclass
class C:
val: Union[A, B]
loader = dataloader.Loader()
loader.basiccast = False
assert type(loader.load({'val': {'a': 1}}, C).val) == A
assert type(loader.load({'val': {'a': '1'}}, C).val) == B
# This class has to be defined at the top-level of the module to be visible by get_type_hints
# when it resolves the "Node" string annotation.
@dataclass
class Node:
name: str
child: Optional["Node"] = None
class TestDataclassDump(unittest.TestCase):
def test_dump(self):
@dataclass
class A:
a: int
b: int = 0
assert dump(A(12)) == {'a': 12}
assert dump(A(12), hidedefault=False) == {'a': 12, 'b': 0}
if sys.version_info.minor >= 10:
def test_dump_slots(self):
@dataclass(slots=True)
class A:
a: int
assert dump(A(1)) == {'a': 1}
def test_factory_dump(self):
@dataclass
class A:
a: int
b: List[int] = field(default_factory=list)
assert dump(A(3)) == {'a': 3}
assert dump(A(12), hidedefault=False) == {'a': 12, 'b': []}
def test_cyclic_dump(self):
assert dump(Node("foo")) == {"name": "foo"}
assert dump(Node("foo", child=Node("bar"))) == {
"name": "foo",
"child": {"name": "bar"},
}
class TestDataclassMangle(unittest.TestCase):
def test_mangle_extra(self):
@dataclass
class Mangle:
value: int = field(metadata={'name': 'Value'})
assert load({'value': 12, 'Value': 12}, Mangle) == Mangle(12)
with self.assertRaises(exceptions.TypedloadValueError):
load({'value': 12, 'Value': 12}, Mangle, failonextra=True)
def test_mangle_load(self):
@dataclass
class Mangle:
value: int = field(metadata={'name': 'va.lue'})
assert load({'va.lue': 1}, Mangle) == Mangle(1)
assert dump(Mangle(1)) == {'va.lue': 1}
def test_case(self):
@dataclass
class Mangle:
value: int = field(metadata={'name': 'Value'})
assert load({'Value': 1}, Mangle) == Mangle(1)
assert 'Value' in dump(Mangle(1))
with self.assertRaises(TypeError):
load({'value': 1}, Mangle)
def test_mangle_rename(self):
@dataclass
class Mangle:
a: int = field(metadata={'name': 'b'})
b: str = field(metadata={'name': 'a'})
assert load({'b': 1, 'a': 'ciao'}, Mangle) == Mangle(1, 'ciao')
assert dump(Mangle(1, 'ciao')) == {'b': 1, 'a': 'ciao'}
def test_weird_mangle(self):
@dataclass
class Mangle:
a: int = field(metadata={'name': 'b', 'alt': 'q'})
b: str = field(metadata={'name': 'a'})
assert load({'b': 1, 'a': 'ciao'}, Mangle) == Mangle(1, 'ciao')
assert load({'q': 1, 'b': 'ciao'}, Mangle, mangle_key='alt') == Mangle(1, 'ciao')
assert dump(Mangle(1, 'ciao')) == {'b': 1, 'a': 'ciao'}
assert dump(Mangle(1, 'ciao'), mangle_key='alt') == {'q': 1, 'b': 'ciao'}
def test_correct_exception_when_mangling(self):
@dataclass
class A:
a: str = field(metadata={'name': 'q'})
with self.assertRaises(exceptions.TypedloadAttributeError):
load(1, A)
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