echo $?
Monday, March 27, 2017
debian: How to check if package is installed
To check if ca-certificates package is installed run this command:
dpkg -s ca-certificates
Saturday, March 11, 2017
fedora: Set up DLNA server
I you have smart TV or WIFI speaker like Sonos it is possible to play media content on them from your computer.
I tried 2 different DLNA servers: minidlnad and rygel.
My expierence with minidlnad was not that great. Configuration was easy but both speaker and TV were not able to see DLNA server running on my laptop quite often
So I tried rygel. Rygel is maintained by GNOME community. The application is great and very easy to use. The installation is simple:
sudo dnf install rygel
After appliction is installed you can start it from the terminal via command:
rygel
It will automatically inspect your Music, Video and Pictures folders and add their content to the database. Created DLNA server is immediately available on the client devices.
As an interesting bonus, rygel allows you to stream the output from your audio card. The idea is absolutely fantastic! However, I had a latency about 5 seconds which makes watching videos on your computer and playing the sound on the remote speaker very uncomfortable. If anyone knows how to fix it, please post the solution in the comments.
There is a very nice wiki article that describes how to achieve it.
There are 2 methods: with External plugin (which does all the job automatically) and with GstLaunch plugin
The first method did not work for me, so I would describe the second one
By default rygel uses configuration file located in /etc/rygel.conf. The file can also be used as a documentation. All available options are described very well. It is possible to overwrite default options by creating ~/.config/rygel.conf file.
Create file ~/.config/rygel.conf with the following content:
[general]
upnp-enabled=true
[Tracker]
enabled=false
[MediaExport]
enabled=true
uris=@MUSIC@;@VIDEOS@;
[GstLaunch]
enabled=true
launch-items=mypulseaudioflac
mypulseaudioflac-title=Audio Output on @HOSTNAME@
mypulseaudioflac-mime=audio/flac
mypulseaudioflac-launch=pulsesrc device=upnp.monitor ! flacenc
Install dependencies:
sudo dnf install pavucontrol paprefs gupnp-tools
Configure pulseaudio to create a separate audio device for streaming with paprefs command
And that is it! When playing media files, select a proper audio output device:
You might need to restart OS to apply all changes.
Thursday, March 9, 2017
List data samples for faker
faker is a very useful library for generating beautiful test data. However, I was not able to find a proper description with all providers. All samples (plus some useless data) can be printed and inspected with the following code:
The output is:
from faker import Factory as FakerFactory
faker = FakerFactory.create()
methods = [method for method in dir(faker) if callable(getattr(faker, method)) and not method.startswith("_")]
for item in methods:
try:
print u"- %s:" % item
print u" %s" % getattr(faker, item)()
except TypeError:
pass
- address:
25611 Senger Cove
Cadenmouth, HI 46932-8013
- am_pm:
AM
- boolean:
False
- bothify:
07 sb
- bs:
re-contextualize customized mindshare
- building_number:
86338
- catch_phrase:
Expanded uniform complexity
- century:
III
- chrome:
Mozilla/5.0 (Windows NT 6.0) AppleWebKit/5361 (KHTML, like Gecko) Chrome/14.0.879.0 Safari/5361
- city:
Sporershire
- city_prefix:
Lake
- city_suffix:
port
- color_name:
Indigo
- company:
Flatley Inc
- company_email:
kbaumbach@mckenzie.com
- company_suffix:
LLC
- country:
Syrian Arab Republic
- country_code:
FI
- credit_card_expire:
12/26
- credit_card_full:
Diners Club / Carte Blanche
Pierre Donnelly
36417005868777 04/26
CVC: 568
- credit_card_number:
6011478274887340
- credit_card_provider:
VISA 16 digit
- credit_card_security_code:
081
- currency_code:
RSD
- date:
1982-04-04
- date_time:
1999-05-19 00:50:24
- date_time_ad:
1864-03-03 15:27:13
- date_time_between:
2002-08-21 16:01:56
- date_time_between_dates:
2017-03-08 21:56:07
- date_time_this_century:
2016-01-14 03:30:51
- date_time_this_decade:
2014-08-17 00:29:28
- date_time_this_month:
2017-03-03 08:27:52
- date_time_this_year:
2017-01-10 12:08:41
- day_of_month:
04
- day_of_week:
Saturday
- domain_name:
altenwerth.com
- domain_word:
cronawalker
- ean:
3265654672776
- ean13:
4119002606106
- ean8:
13383411
- email:
columbus64@gmail.com
- file_extension:
png
- file_name:
aperiam.html
- firefox:
Mozilla/5.0 (Windows NT 6.1; it-IT; rv:1.9.2.20) Gecko/2012-07-23 16:34:01 Firefox/4.0
- first_name:
Tella
- first_name_female:
Oliva
- first_name_male:
Arba
- format:
- free_email:
milford.rempel@yahoo.com
- free_email_domain:
yahoo.com
- geo_coordinate:
-82.910152
- get_formatter:
- get_providers:
[<faker.providers.user_agent.Provider object at 0x7fcce4201410>, <faker.providers.ssn.en_US.Provider object at 0x7fcce4201450>, <faker.providers.python.Provider object at 0x7fcce42013d0>, <faker.providers.profile.Provider object at 0x7fcce4201390>, <faker.providers.phone_number.en_US.Provider object at 0x7fcce4201350>, <faker.providers.person.en_US.Provider object at 0x7fcce4201310>, <faker.providers.misc.Provider object at 0x7fcce4201250>, <faker.providers.lorem.la.Provider object at 0x7fcce42012d0>, <faker.providers.job.en_US.Provider object at 0x7fcce4201290>, <faker.providers.internet.en_US.Provider object at 0x7fcce4201210>, <faker.providers.file.Provider object at 0x7fcce42011d0>, <faker.providers.date_time.Provider object at 0x7fcce4201190>, <faker.providers.currency.Provider object at 0x7fcce4201150>, <faker.providers.credit_card.Provider object at 0x7fcce4201110>, <faker.providers.company.en_US.Provider object at 0x7fcce4201090>, <faker.providers.color.en_US.Provider object at 0x7fcce42010d0>, <faker.providers.barcode.Provider object at 0x7fcce4201050>, <faker.providers.address.en_US.Provider object at 0x7fcce41e9fd0>]
- hex_color:
#69d7c0
- image_url:
http://www.lorempixum.com/373/972
- internet_explorer:
Mozilla/5.0 (compatible; MSIE 6.0; Windows NT 5.01; Trident/3.1)
- ipv4:
129.146.124.124
- ipv6:
ef5e:860d:c643:8233:0ff0:d40d:7739:9844
- iso8601:
2007-01-25T19:03:46
- job:
Dancer
- language_code:
de
- last_name:
Romaguera
- last_name_female:
Heidenreich
- last_name_male:
Bogan
- latitude:
62.9329675
- lexify:
UGTW
- linux_platform_token:
X11; Linux x86_64
- linux_processor:
x86_64
- locale:
ru_TO
- longitude:
-49.789527
- mac_address:
41:9e:ad:ca:2a:fe
- mac_platform_token:
Macintosh; PPC Mac OS X 10_5_2
- mac_processor:
Intel
- md5:
04c1004fa2b0de119d764c4ec41e567d
- military_apo:
PSC 0750, Box 3490
- military_dpo:
Unit 1372 Box 0808
- military_ship:
USNV
- military_state:
AE
- mime_type:
message/rfc822
- month:
11
- month_name:
February
- name:
Dorcas Wolff MD
- name_female:
Amy Tromp
- name_male:
Colvin Hoppe
- null_boolean:
False
- numerify:
597
- opera:
Opera/9.27.(Windows NT 6.2; it-IT) Presto/2.9.173 Version/11.00
- paragraph:
Ex est maiores et maiores id voluptatem velit iure. Ratione ad enim sed. Quidem ea vel esse quis molestiae quisquam tempora.
- paragraphs:
[u'Ipsum consequatur et et et et. Voluptatem qui totam veritatis. Quasi vitae autem quos magnam ducimus. Doloremque minima perferendis quibusdam mollitia doloremque. Et temporibus porro quia eveniet sunt.', u'Neque nihil cupiditate sunt. Velit ducimus sint qui eaque nam.', u'Sequi labore laudantium expedita iusto aspernatur quibusdam ipsa hic. Et delectus numquam et fugit. Et quo explicabo quia voluptatem molestias blanditiis omnis. Mollitia facilis molestiae sunt aut eius quia.']
- parse:
- password:
H$E4isuB__
- phone_number:
322-309-6514
- postalcode:
36510
- postalcode_plus4:
31785-2317
- postcode:
63240
- prefix:
Dr.
- prefix_female:
Miss
- prefix_male:
Mr.
- profile:
{'website': [u'http://feest.com/', u'http://runolfsson.info/', u'http://www.wiegand.com/', u'http://www.rennerzemlak.org/'], 'username': u'bogisich.forest', 'name': u'Lorenz Friesen III', 'blood_group': 'A+', 'residence': u'87593 Douglas Pike\nBeahanberg, NY 08971-4439', 'company': u'Ratke and Sons', 'address': u'3721 Rath Springs\nMillerbury, AK 65443-3366', 'birthdate': '1985-10-14', 'sex': 'M', 'job': 'Scientist, research (medical)', 'ssn': u'658-53-8410', 'current_location': (Decimal('-69.179215'), Decimal('73.080343')), 'mail': u'natalee03@yahoo.com'}
- provider:
- pybool:
False
- pydecimal:
93907633.3459
- pydict:
{u'non': u'Sint at et ut ut.', u'voluptas': datetime(2011, 6, 30, 13, 28, 24), u'in': u'Consequatur modi ut.', u'temporibus': u'nberge@gmail.com', u'quam': 5946, u'quia': -50185653292693.0, u'corporis': 44989.34539971, u'aspernatur': datetime(2001, 5, 8, 5, 0, 4), u'id': u'Voluptas et.', u'consequatur': u'Sint voluptatum quo.'}
- pyfloat:
5.427466
- pyint:
5831
- pyiterable:
[u'Praesentium atque.', 510, u'Voluptatem.', u'Aspernatur culpa.', -86872010066.1, Decimal('1.39045051271E+12'), u'Aut neque quod quis.', 774237663.8, u'Libero voluptates.']
- pylist:
[u'Enim voluptatem.', u'In ut unde aut est.', 3744, u'Tenetur harum nam.', u'Amet nam quam.', Decimal('-2.15222088569E+13'), 56014295154.367]
- pyset:
set([2144, u'Est voluptas rem.', datetime(1989, 2, 18, 3, 52, 13), u'Est nihil.', Decimal('-243.7196'), datetime(1983, 9, 28, 12, 52, 56), u'beverlee76@yahoo.com', Decimal('-3.04622164413E+12'), u'Natus ut atque.'])
- pystr:
Ex non explicabo.
- pystruct:
- pytuple:
- random_digit:
5
- random_digit_not_null:
1
- random_digit_not_null_or_empty:
- random_digit_or_empty:
9
- random_element:
b
- random_int:
3804
- random_letter:
x
- random_number:
981
- randomize_nb_elements:
11
- rgb_color:
63,125,116
- rgb_color_list:
- rgb_css_color:
rgb(21,8,176)
- safari:
Mozilla/5.0 (iPod; U; CPU iPhone OS 3_1 like Mac OS X; en-US) AppleWebKit/533.9.6 (KHTML, like Gecko) Version/3.0.5 Mobile/8B112 Safari/6533.9.6
- safe_color_name:
fuchsia
- safe_email:
irvin.little@example.net
- safe_hex_color:
#dd7700
- secondary_address:
Suite 378
- seed:
None
- sentence:
Consequuntur unde quo non voluptas minima voluptatibus.
- sentences:
[u'Sapiente quia incidunt porro dolorum sapiente.', u'Et quaerat ad nesciunt maiores.', u'Ut excepturi autem qui laboriosam.']
- set_formatter:
- sha1:
aab5c833e76265e48aa35b5b39ed798b2d21d971
- sha256:
d74cbb45b74394c6a95f55f27926db1bdfeaf42dbbfcb3fddff22911f0dd4202
- simple_profile:
{'username': u'cbuckridge', 'name': u'Britta Cartwright', 'birthdate': '1974-08-05', 'sex': 'M', 'address': u'123 Talia Island\nSouth Thursa, DC 68141', 'mail': u'vonda67@hotmail.com'}
- slug:
ut-ducimus-illum
- ssn:
142-04-9440
- state:
Vermont
- state_abbr:
VT
- street_address:
33334 Auer Via
- street_name:
Tayler Pines
- street_suffix:
Curve
- suffix:
II
- suffix_female:
DVM
- suffix_male:
V
- text:
Eius ut atque voluptatum deserunt similique aliquid. Rerum quo commodi cum eius.
- time:
14:45:00
- time_delta:
16412 days, 22:34:37
- timezone:
Asia/Saigon
- tld:
com
- unix_time:
330977642
- uri:
http://boyer.com/main/index.php
- uri_extension:
.html
- uri_page:
post
- uri_path:
tags/posts
- url:
http://www.hammes.com/
- user_agent:
Mozilla/5.0 (compatible; MSIE 7.0; Windows 98; Trident/4.0)
- user_name:
jenkins.layton
- uuid4:
8fef0d23-2010-44f1-873a-49767169db27
- windows_platform_token:
Windows 95
- word:
omnis
- words:
[u'neque', u'odit', u'dolorum']
- year:
1975
- zipcode:
77130
- zipcode_plus4:
71629-5918
Test that the correct template was used in a view function when testing with RequestFactory in Django
Django has a special assertion method for that purpose:
with self.assertTemplateUsed("agents/incoming_queue.html"):
response = incoming_queue(self.request)
Test context of the rendered template with RequestFactory in Django
When writing tests for the Django's view functions I prefer to use RequestFactory instead of the django test client. Tests that use RequestFactory are easier to understand and they are faster.
For example, you need to test a simple view function:
If you want to test the context of the rendered template, it is easy to do with django test client as it attaches it to the response. If you want to use RequestFactory for that purpose, there is no easy way to do it.
It would be comfortable to have something like assertTemplateContextIn(expected_context) method, that checks that expected_context was used during the template rendering.
The following code was inspired by assertTemplateUsed method:
We ofthen pass querysets instances to the context of the rendered template. The code above checks if 2 QuerySets are the same by comparing their models and ids of the elements.
TemplateContextTestCase class can be used to extend TestCase class:
def incoming_queue(request):
if request.method == "POST":
pass
else:
incoming_queue_list = UsageHistory.objects.filter(company=request.user.agent.company, queued=True)
context = {
"incoming_queue_list": incoming_queue_list,
"page": "queue",
"agent_available_url": reverse("agent_available")
}
return render(request, 'agents/incoming_queue.html', context)
from copy import copy
from django.db.models.query import QuerySet
from django.test.signals import template_rendered
from django.test.utils import ContextList
class TemplateContextTestCase(object):
def assertTemplateContextIn(self, expected_context=None):
"""
Asserts that the template was rendered with the context that includes
expected_context. Example:
with self.assertTemplateContextIn(expected_context):
vuew_function(self.request)
"""
return _AssertTemplateContext(self, expected_context)
class _AssertTemplateContext(object):
def __init__(self, test_case, expected_context):
self.test_case = test_case
self.expected_context = expected_context
self.context = ContextList()
def on_template_render(self, sender, signal, template, context, **kwargs):
self.context.append(copy(context))
def test(self):
missing = []
mismatched = []
for key in self.expected_context.keys():
if key in self.context:
if self.context[key] != self.expected_context[key]:
match = False
# Compare QuerySets
if isinstance(self.context[key], QuerySet) and isinstance(self.expected_context[key], QuerySet):
if self.context[key].model == self.expected_context[key].model:
if list(self.context[key].values_list("id", flat=True)) == \
list(self.expected_context[key].values_list("id", flat=True)):
match = True
if not match:
mismatched.append(key)
else:
missing.append(key)
return missing, mismatched
def __enter__(self):
template_rendered.connect(self.on_template_render)
return self
def __exit__(self, exc_type, exc_value, traceback):
template_rendered.disconnect(self.on_template_render)
if exc_type is not None:
return
missing, mismatched = self.test()
message = ""
if missing:
message = message + "Missing keys: " + ", ".join(x for x in missing) + "\n"
if mismatched:
for item in mismatched:
message = message + "Context key mismatch '%s': %s != %s \n" % (
item, self.expected_context[item], self.context[item]
)
if message:
self.test_case.fail(message)
from django.test import TestCase, RequestFactory
from yourapp.tests.helpers import TemplateContextTestCase
from django.core.urlresolvers import reverse
class TestIncomingQueue(TestCase, TemplateContextTestCase):
def test_context(self):
agent = AgentFactory()
self.request.user = agent.user
expected = {
"page": "queue",
"agent_available_url": reverse("agent_available"),
"incoming_queue_list": UsageHistory.objects.none()
}
with self.assertTemplateContextIn(expected):
incoming_queue(self.request)
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