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from datetime import date, datetime, timedelta, timezone
from decimal import Decimal
from uuid import uuid4
import pytest
from django.test import TestCase
from rest_framework.compat import coreapi
from rest_framework.utils.encoders import JSONEncoder
from rest_framework.utils.serializer_helpers import ReturnList
utc = timezone.utc
class MockList:
def tolist(self):
return [1, 2, 3]
class JSONEncoderTests(TestCase):
"""
Tests the JSONEncoder method
"""
def setUp(self):
self.encoder = JSONEncoder()
def test_encode_decimal(self):
"""
Tests encoding a decimal
"""
d = Decimal(3.14)
assert self.encoder.default(d) == float(d)
def test_encode_datetime(self):
"""
Tests encoding a datetime object
"""
current_time = datetime.now()
assert self.encoder.default(current_time) == current_time.isoformat()
current_time_utc = current_time.replace(tzinfo=utc)
assert self.encoder.default(current_time_utc) == current_time.isoformat() + 'Z'
def test_encode_time(self):
"""
Tests encoding a timezone
"""
current_time = datetime.now().time()
assert self.encoder.default(current_time) == current_time.isoformat()
def test_encode_time_tz(self):
"""
Tests encoding a timezone aware timestamp
"""
current_time = datetime.now().time()
current_time = current_time.replace(tzinfo=utc)
with pytest.raises(ValueError):
self.encoder.default(current_time)
def test_encode_date(self):
"""
Tests encoding a date object
"""
current_date = date.today()
assert self.encoder.default(current_date) == current_date.isoformat()
def test_encode_timedelta(self):
"""
Tests encoding a timedelta object
"""
delta = timedelta(hours=1)
assert self.encoder.default(delta) == str(delta.total_seconds())
def test_encode_uuid(self):
"""
Tests encoding a UUID object
"""
unique_id = uuid4()
assert self.encoder.default(unique_id) == str(unique_id)
@pytest.mark.skipif(not coreapi, reason='coreapi is not installed')
def test_encode_coreapi_raises_error(self):
"""
Tests encoding a coreapi objects raises proper error
"""
with pytest.raises(RuntimeError):
self.encoder.default(coreapi.Document())
with pytest.raises(RuntimeError):
self.encoder.default(coreapi.Error())
def test_encode_object_with_tolist(self):
"""
Tests encoding a object with tolist method
"""
foo = MockList()
assert self.encoder.default(foo) == [1, 2, 3]
def test_encode_empty_returnlist(self):
"""
Tests encoding an empty ReturnList
"""
foo = ReturnList(serializer=None)
assert self.encoder.default(foo) == []
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