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"""
Create several custom encoders and test that they work
"""
# stdlib
import collections
from datetime import date, datetime, time, timedelta, timezone
from decimal import Decimal
from fractions import Fraction
# 3rd party
import pytest
# this package
import sdjson
@pytest.mark.usefixtures("monkeypatch_sdjson")
def test_decimal_float() -> None:
# Create and register a custom encoder for Decimal that turns it into a float
@sdjson.encoders.register(Decimal)
def encode_decimal_float(obj):
return float(obj)
assert sdjson.dumps(Decimal(str(12.3456))) == "12.3456"
# Cleanup
sdjson.encoders.unregister(Decimal)
@pytest.mark.usefixtures("monkeypatch_sdjson")
def test_decimal_str() -> None:
# Create and register a custom encoder for Decimal that turns it into a str
@sdjson.encoders.register(Decimal)
def encode_decimal_str(obj):
return str(obj)
assert sdjson.dumps(Decimal(str(12.3456))) == '"12.3456"'
# Cleanup
sdjson.encoders.unregister(Decimal)
@pytest.mark.usefixtures("monkeypatch_sdjson")
def test_fraction_float() -> None:
# Create and register a custom encoder for Fraction that turns it into a float
@sdjson.encoders.register(Fraction)
def encode_fraction_float(obj):
return float(obj)
assert sdjson.dumps(Fraction(13, 10)) == "1.3"
assert sdjson.dumps(Fraction(3, 4)) == "0.75"
assert sdjson.dumps(Fraction(9, 11)) == "0.8181818181818182"
assert sdjson.dumps(Fraction(140, 144)) == "0.9722222222222222"
assert sdjson.dumps(Fraction(2, 7)) == "0.2857142857142857"
# Cleanup
sdjson.encoders.unregister(Fraction)
@pytest.mark.usefixtures("monkeypatch_sdjson")
def test_fraction_str() -> None:
# Create and register a custom encoder for Fraction that turns it into a str
@sdjson.encoders.register(Fraction)
def encode_fraction_str(obj):
return str(obj)
assert sdjson.dumps(Fraction(13, 10)) == '"13/10"'
assert sdjson.dumps(Fraction(3, 4)) == '"3/4"'
assert sdjson.dumps(Fraction(9, 11)) == '"9/11"'
assert sdjson.dumps(Fraction(140, 144)) == '"35/36"'
assert sdjson.dumps(Fraction(2, 7)) == '"2/7"'
# Cleanup
sdjson.encoders.unregister(Fraction)
@pytest.mark.usefixtures("monkeypatch_sdjson")
def test_datetime_float() -> None:
# Create and register a custom encoder for datetime that turns it into a float
@sdjson.encoders.register(datetime)
def encode_datetime_float(obj):
return obj.timestamp()
assert sdjson.dumps(datetime(1945, 5, 8, 19, 20, tzinfo=timezone.utc)) == "-777876000.0"
# Cleanup
sdjson.encoders.unregister(datetime)
@pytest.mark.usefixtures("monkeypatch_sdjson")
def test_datetime_str() -> None:
# Create and register a custom encoder for datetime that turns it into a str
@sdjson.encoders.register(datetime)
def encode_datetime_str(obj):
return f"{obj:%Y/%m/%d %H:%M}"
assert sdjson.dumps(datetime(1945, 5, 8, 19, 20)) == '"1945/05/08 19:20"'
# Cleanup
sdjson.encoders.unregister(datetime)
@pytest.mark.usefixtures("monkeypatch_sdjson")
def test_datetime_tuple() -> None:
# Create and register a custom encoder for datetime that turns it into a timetuple
@sdjson.encoders.register(datetime)
def encode_datetime_tuple(obj):
return obj.timetuple()
assert sdjson.dumps(datetime(1945, 5, 8, 19, 20)) == "[1945, 5, 8, 19, 20, 0, 1, 128, -1]"
# Cleanup
sdjson.encoders.unregister(datetime)
@pytest.mark.usefixtures("monkeypatch_sdjson")
def test_timedelta_float() -> None:
# Create and register a custom encoder for timedelta that turns it into a float
@sdjson.encoders.register(timedelta)
def encode_timedelta_float(obj):
return obj.total_seconds()
start_date = datetime(1945, 5, 8, 19, 20).replace(tzinfo=timezone.utc)
end_date = datetime(2020, 5, 8, 9, 0).replace(tzinfo=timezone.utc)
delta = end_date - start_date
assert sdjson.dumps(delta) == "2366804400.0"
# Cleanup
sdjson.encoders.unregister(timedelta)
# def test_date_float() -> None:
# # Create and register a custom encoder for date that turns it into a float
# @sdjson.encoders.register(date)
# def encode_date_float(obj):
# return obj.timestamp()
#
# assert sdjson.dumps(date(1945, 5, 8)) == "-777952800.0"
#
# # Cleanup
# sdjson.encoders.unregister(date)
@pytest.mark.usefixtures("monkeypatch_sdjson")
def test_date_str() -> None:
# Create and register a custom encoder for date that turns it into a str
@sdjson.encoders.register(date)
def encode_date_str(obj):
return f"{obj:%Y/%m/%d}"
assert sdjson.dumps(date(1945, 5, 8)) == '"1945/05/08"'
# Cleanup
sdjson.encoders.unregister(date)
@pytest.mark.usefixtures("monkeypatch_sdjson")
def test_date_tuple() -> None:
# Create and register a custom encoder for date that turns it into a timetuple
@sdjson.encoders.register(date)
def encode_date_tuple(obj):
return obj.timetuple()
assert sdjson.dumps(date(1945, 5, 8)) == "[1945, 5, 8, 0, 0, 0, 1, 128, -1]"
# Cleanup
sdjson.encoders.unregister(date)
@pytest.mark.usefixtures("monkeypatch_sdjson")
def test_time_float() -> None:
# Create and register a custom encoder for time that turns it into a float
@sdjson.encoders.register(time)
def encode_date_float(obj):
return int(timedelta(hours=obj.hour, minutes=obj.minute, seconds=obj.second).total_seconds())
assert sdjson.dumps(time(9, 10, 11)) == "33011"
# Cleanup
sdjson.encoders.unregister(time)
# Create and register a custom encoder for date that turns it into a float
@pytest.mark.usefixtures("monkeypatch_sdjson")
def test_time_str() -> None:
# Create and register a custom encoder for time that turns it into a str
@sdjson.encoders.register(time)
def encode_time_str(obj):
return f"{obj:%H:%M:%S}"
assert sdjson.dumps(time(9, 10, 11)) == '"09:10:11"'
# Cleanup
sdjson.encoders.unregister(time)
@pytest.mark.usefixtures("monkeypatch_sdjson")
def test_time_tuple() -> None:
# Create and register a custom encoder for time that turns it into a timetuple
@sdjson.encoders.register(time)
def encode_time_tuple(obj):
return obj.hour, obj.minute, obj.second
assert sdjson.dumps(time(9, 10, 11)) == "[9, 10, 11]"
# Cleanup
sdjson.encoders.unregister(time)
@pytest.mark.xfail(reason="Not implemented in CPython yet.")
@pytest.mark.usefixtures("monkeypatch_sdjson")
def test_named_tuple() -> None:
# Ref: https://bugs.python.org/issue30343
# https://github.com/python/cpython/pull/1558
Student = collections.namedtuple("Student", "name, age, teacher")
try:
@sdjson.encoders.register(Student)
def encode_student(obj):
return {
"name": obj.name,
"age": obj.age,
"teacher": obj.teacher,
}
assert sdjson.dumps(Student("Alice", 12, "Sue")) == '{"name": "Alice", "age": 12, "teacher": "Sue"}'
finally:
# Cleanup
sdjson.encoders.unregister(Student, True)
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