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# typedload
# Copyright (C) 2018 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 enum import Enum
from typing import Dict, FrozenSet, List, NamedTuple, Optional, Set, Tuple, Union
import unittest
from typedload import dataloader, load
class TestLegacy_oldsyntax(unittest.TestCase):
def test_legacyload(self):
A = NamedTuple('A', [('a', int), ('b', str)])
assert load({'a': 101, 'b': 'ciao'}, A) == A(101, 'ciao')
def test_nestedlegacyload(self):
A = NamedTuple('A', [('a', int), ('b', str)])
B = NamedTuple('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')])
class TestUnion_oldsyntax(unittest.TestCase):
def test_ComplicatedUnion(self):
A = NamedTuple('A', [('a', int)])
B = NamedTuple('B', [('a', str)])
C = NamedTuple('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
def test_optional(self):
loader = dataloader.Loader()
assert loader.load(1, Optional[int]) == 1
assert loader.load(None, Optional[int]) == None
assert loader.load('1', Optional[int]) == 1
with self.assertRaises(ValueError):
loader.load('ciao', Optional[int])
loader.basiccast = False
loader.load('1', Optional[int])
def test_union(self):
loader = dataloader.Loader()
loader.basiccast = False
assert loader.load(1, Optional[Union[int, str]]) == 1
assert loader.load('a', Optional[Union[int, str]]) == 'a'
assert loader.load(None, Optional[Union[int, str]]) == None
assert type(loader.load(1, Optional[Union[int, float]])) == int
assert type(loader.load(1.0, Optional[Union[int, float]])) == float
with self.assertRaises(ValueError):
loader.load('', Optional[Union[int, float]])
loader.basiccast = True
assert type(loader.load(1, Optional[Union[int, float]])) == int
assert type(loader.load(1.0, Optional[Union[int, float]])) == float
assert loader.load(None, Optional[str]) is None
class TestNamedTuple_oldsyntax(unittest.TestCase):
def test_simple(self):
A = NamedTuple('A', [('a', int), ('b', str)])
loader = dataloader.Loader()
r = A(1,'1')
assert loader.load({'a': 1, 'b': 1}, A) == r
assert loader.load({'a': 1, 'b': 1, 'c': 3}, A) == r
loader.failonextra = True
with self.assertRaises(TypeError):
loader.load({'a': 1, 'b': 1, 'c': 3}, A)
def test_nested(self):
A = NamedTuple('A', [('a', int)])
B = NamedTuple('B', [('a', A)])
loader = dataloader.Loader()
r = B(A(1))
assert loader.load({'a': {'a': 1}}, B) == r
with self.assertRaises(TypeError):
loader.load({'a': {'a': 1}}, A)
def test_fail(self):
A = NamedTuple('A', [('a', int), ('q', str)])
loader = dataloader.Loader()
with self.assertRaises(TypeError):
loader.load({'a': 3}, A)
class TestSet(unittest.TestCase):
def test_load_set(self):
loader = dataloader.Loader()
r = {(1, 1), (2, 2), (0, 0)}
assert loader.load(zip(range(3), range(3)), Set[Tuple[int,int]]) == r
assert loader.load([1, '2', 2], Set[int]) == {1, 2}
def test_load_frozen_set(self):
loader = dataloader.Loader()
assert loader.load(range(4), FrozenSet[float]) == frozenset((0.0, 1.0, 2.0, 3.0))
class TestDict(unittest.TestCase):
def test_load_dict(self):
loader = dataloader.Loader()
class State(Enum):
OK = 'ok'
FAILED = 'failed'
v = {'1': 'ok', '15': 'failed'}
r = {1: State.OK, 15: State.FAILED}
assert loader.load(v, Dict[int, State]) == r
def test_load_nondict(self):
class SimDict():
def items(self):
return zip(range(12), range(12))
loader = dataloader.Loader()
assert loader.load(SimDict(), Dict[str, int]) == {str(k): v for k,v in zip(range(12), range(12))}
with self.assertRaises(AttributeError):
loader.load(33, Dict[int, str])
class TestTuple(unittest.TestCase):
def test_load_list_of_tuples(self):
t = List[Tuple[str, int, Tuple[int, int]]]
v = [
['a', 12, [1, 1]],
['b', 15, [3, 2]],
]
r = [
('a', 12, (1, 1)),
('b', 15, (3, 2)),
]
loader = dataloader.Loader()
assert loader.load(v, t) == r
def test_load_nested_tuple(self):
loader = dataloader.Loader()
assert loader.load([1, 2, 3, [1, 2]], Tuple[int,int,int,Tuple[str,str]]) == (1, 2, 3, ('1', '2'))
def test_load_tuple(self):
loader = dataloader.Loader()
assert loader.load([1, 2, 3], Tuple[int,int,int]) == (1, 2, 3)
assert loader.load(['2', False, False], Tuple[int, bool]) == (2, False)
with self.assertRaises(ValueError):
loader.load(['2', False], Tuple[int, bool, bool])
loader.failonextra = True
assert loader.load(['2', False, False], Tuple[int, bool]) == (2, False)
class TestLoader(unittest.TestCase):
def test_kwargs(self):
with self.assertRaises(ValueError):
load(1, str, basiccast=False)
load(1, int, handlers=[])
class TestBasicTypes(unittest.TestCase):
def test_basic_casting(self):
# Casting enabled, by default
loader = dataloader.Loader()
assert loader.load(1, int) == 1
assert loader.load(1.1, int) == 1
assert loader.load(False, int) == 0
assert loader.load('ciao', str) == 'ciao'
assert loader.load('1', float) == 1.0
with self.assertRaises(ValueError):
loader.load('ciao', float)
def test_list_basic(self):
loader = dataloader.Loader()
assert loader.load(range(12), List[int]) == list(range(12))
assert loader.load(range(12), List[str]) == [str(i) for i in range(12)]
def test_extra_basic(self):
# Add more basic types
loader = dataloader.Loader()
with self.assertRaises(TypeError):
assert loader.load(b'ciao', bytes) == b'ciao'
loader.basictypes.add(bytes)
assert loader.load(b'ciao', bytes) == b'ciao'
def test_none_basic(self):
loader = dataloader.Loader()
loader.load(None, type(None))
with self.assertRaises(ValueError):
loader.load(12, type(None))
def test_basic_nocasting(self):
# Casting enabled, by default
loader = dataloader.Loader()
loader.basiccast = False
assert loader.load(1, int) == 1
assert loader.load(True, bool) == True
assert loader.load(1.5, float) == 1.5
with self.assertRaises(ValueError):
loader.load(1.1, int)
loader.load(False, int)
loader.load('ciao', str)
loader.load('1', float)
class TestHandlers(unittest.TestCase):
def test_custom_handler(self):
class Q:
def __eq__(self, other):
return isinstance(other, Q)
loader = dataloader.Loader()
loader.handlers.append((
lambda t: t == Q,
lambda l, v, t: Q()
))
assert loader.load('test', Q) == Q()
def test_broken_handler(self):
loader = dataloader.Loader()
loader.handlers.insert(0, (lambda t: 33 + t is None, lambda l, v, t: None))
with self.assertRaises(TypeError):
loader.load(1, int)
loader.raiseconditionerrors = False
assert loader.load(1, int) == 1
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