Skip to main content

Let your Python tests travel through time

Project description

https://secure.travis-ci.org/spulec/freezegun.png?branch=master https://coveralls.io/repos/spulec/freezegun/badge.png?branch=master

FreezeGun is a library that allows your python tests to travel through time by mocking the datetime module.

Usage

Once the decorator or context manager have been invoked, all calls to datetime.datetime.now(), datetime.datetime.utcnow(), datetime.date.today(), and time.time() will return the time that has been frozen.

Decorator

from freezegun import freeze_time

@freeze_time("2012-01-14")
def test():
    assert datetime.datetime.now() == datetime.datetime(2012, 01, 14)

# Or class based

@freeze_time("2012-01-14")
class Tester(object):
    def test_the_class(self):
        assert datetime.datetime.now() == datetime.datetime(2012, 01, 14)

Context Manager

from freezegun import freeze_time

def test():
    assert datetime.datetime.now() != datetime.datetime(2012, 01, 14)
    with freeze_time("2012-01-14"):
        assert datetime.datetime.now() == datetime.datetime(2012, 01, 14)
    assert datetime.datetime.now() != datetime.datetime(2012, 01, 14)

Raw use

from freezegun import freeze_time

freezer = freeze_time("2012-01-14 12:00:01")
freezer.start()
assert datetime.datetime.now() == datetime.datetime(2012, 01, 14, 12, 00, 01)
freezer.stop()

Timezones

from freezegun import freeze_time

@freeze_time("2012-01-14 03:21:34", tz_offset=-4)
def test():
    assert datetime.datetime.utcnow() == datetime.datetime(2012, 01, 14, 03, 21, 34)
    assert datetime.datetime.now() == datetime.datetime(2012, 01, 13, 23, 21, 34)

    # datetime.date.today() uses local time
    assert datetime.date.today() == datetime.datetime(2012, 01, 13)

Nice inputs

FreezeGun uses dateutil behind the scenes so you can have nice-looking datetimes

@freeze_time("Jan 14th, 2012")
def test_nice_datetime():
    assert datetime.datetime.now() == datetime.datetime(2012, 01, 14)

Installation

To install FreezeGun, simply:

$ pip install freezegun

Project details


Download files

Download the file for your platform. If you're not sure which to choose, learn more about installing packages.

Filename, size & hash SHA256 hash help File type Python version Upload date
freezegun-0.1.14.tar.gz (10.2 kB) Copy SHA256 hash SHA256 Source None Mar 17, 2014

Supported by

Elastic Elastic Search Pingdom Pingdom Monitoring Google Google BigQuery Sentry Sentry Error logging AWS AWS Cloud computing DataDog DataDog Monitoring Fastly Fastly CDN DigiCert DigiCert EV certificate StatusPage StatusPage Status page