devhero

from django.db import transaction


def before_all(context):
    transaction.set_autocommit(False)


def before_scenario(context, scenario):
    context._savepoint = transaction.savepoint()

devhero

# retrieve webelement
input = driver.find_element_by_xpath("//*[@name='fieldname']")
# set attribute from js script referencing webelement found in python code
driver.execute_script("arguments[0].setAttribute('value', 'new value!')", input);
# or
driver.execute_script("arguments[0].setAttribute('value', arguments[1])", input, 'new value!');

# Code for File Upload
file_input = driver.find_element_by_id("uploadBtn")
file_input.send_keys("/absolute/path/to/file")

devhero

# Use a custom compare function that converts the strings into sub-lists of integers. Those will sort correctly without problems.

ls = ['1.1', '1.10', '1.2', '1.2.3', '1.2.1', '1.9']

def section(s):
   return [int(_) for _ in s.split(".")]

sorted(ls, key=section)
# ['1.1', '1.2', '1.2.1', '1.2.3', '1.9', '1.10']

devhero

driver = context.browser

# first set a long timeout for async scripts
driver.set_script_timeout(10)

# then prepare an async function
# eg. retrieve status of a jquery ajax GET
status_code = driver.execute_async_script("""
    var done = arguments[0];
    $.ajax({

devhero

# You can pass additional context to the template using keyword arguments:

{% include "name_snippet.html" with person="Jane" greeting="Hello" %}

# If you want to render the context only with the variables provided (or even no variables at all), use the only option. No other variables are available to the included template:

{% include "name_snippet.html" with greeting="Hi" only %}

devhero

Use the fa-spin class to get any icon to rotate, and use fa-pulse to have it rotate with 8 steps. Works well with fa-spinner, fa-refresh, and fa-cog.

<i class="fa fa-spinner fa-spin fa-3x fa-fw"></i>
<span class="sr-only">Loading...</span>

<i class="fa fa-circle-o-notch fa-spin fa-3x fa-fw"></i>
<span class="sr-only">Loading...</span>

<i class="fa fa-refresh fa-spin fa-3x fa-fw"></i>
<span class="sr-only">Loading...</span>

devhero

@receiver(post_save, sender=Article)
def generate_thumbnails(sender, instance=None, created=False, **kwargs):

    if not instance:
        return

    if hasattr(instance, '_dirty'):
        return

    do_something()

devhero

// create
docker-machine create -d virtualbox --virtualbox-memory '2048' --virtualbox-cpu-count '2' default

// list and start
docker-machine ls
docker-machine start default
docker-machine env
eval $(docker-machine env)

// stop

devhero

dict(map(list, (("a",1), ("b",2))))
# {'a': 1, 'b': 2}

dict(map(reversed, (("a",1), ("b",2))))
# {1: 'a', 2: 'b'}

# from function list, usable for eval
dict(map(lambda x: (x.__name__, x), [round, abs]))
# {'abs': <function abs>, 'round': <function round>}

devhero

import os
import socket

os.environ['DJANGO_LIVE_TEST_SERVER_ADDRESS'] = '0.0.0.0:8000'

class IntegrationTests(StaticLiveServerTestCase):
    live_server_url = 'http://{}:8000'.format(
        socket.gethostbyname(socket.gethostname())
    )