Lessons about Tests (page 3)

The links, tools and tips our engineers and designers share with each other, one “today I learned” at a time.

lessons shared: 44
people sharing: 16
database started in: 2016

realpython.com
How to write automated tests in Django [Django]
Amanda SavluchinskeMay 8, 2018
Today I learned
To avoid a FileField with a custom storage using AWS S3 (django-storages) to try authenticating when model is saved you can ...
To avoid a FileField with a custom storage using AWS S3 (django-storages) to try authenticating when model is saved you can patch the save method of the instance of the storage. Eg.: python class MyTest(TestCase): @mock.patch('my_app.models.my_s3_boto_storage_instance.save') def test_create_my_model(self, save): pass # test model creation
Hugo BessaFebruary 26, 2018
github.com
Django test utils to manage file storage side effects:
Flávio JuvenalDecember 5, 2017
stackoverflow.com
Solution for slow Django tests with custom localhost domain: #comment81243303_28864152
Flávio JuvenalDecember 3, 2017
caktusgroup.com
DRYer Django test code with subtests
Using subtests can help Python developers write cleaner code. Find out how.
Flávio JuvenalAugust 20, 2017
pypi.python.org
Python mutation testing library:
Flávio JuvenalFebruary 22, 2017
Today I learned
Be careful when comparing Decimal and float: Decimal('3.0') == 3.0 but Decimal('3.2') != 3.2.
Filipe XimenesJanuary 11, 2017
Today I learned
This is how you mock components when testing react with jest:
// in your test file jest.mock('../path/to/component/to/Component.js'); Create a __mocks__ folder in the same directory of the component you want to test and a file with the same name of the component inside it: // __mocks__/Component.js import React from 'react'; export default function mock() { return (<span>Component mock</span>); }
Filipe XimenesJanuary 3, 2017
Today I learned
Speed up your Django automated tests with python manage.py test --keepdb --parallel
Flávio JuvenalDecember 27, 2016
bit.ly
Testing image upload in Django Rest Framework:
Django REST Framework - Testing image upload. GitHub Gist: instantly share code, notes, and snippets.
Victor CarriçoDecember 27, 2016
Today I learned
This is how to pass an argument to a Makefile command:
ARG := $(word 2, $(MAKECMDGOALS) ) test: python manage.py test $(ARG) --parallel --keepdb Use like this: make test app.tests
Filipe XimenesDecember 27, 2016
Link offline
circleci.com · offline
Use jest --runInBand for faster builds and to avoid out of memory errors in [CircleCI](
André EricsonDecember 23, 2016
Today I learned
While developing, do python manage.py --keepdb to speed up your Django tests. This prevents the overhead of creating and destroying a new test DB
Flávio JuvenalDecember 22, 2016
hackernoon.com
Use subTest in Python unittest when asserting inside loop: [#.425k66c9b](#.425k66c9b)
Use subTest in Python unittest when asserting inside loop: #.425k66c9b
Filipe XimenesDecember 21, 2016

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Lessons about Tests (page 3)

How to write automated tests in Django [Django]

How to write automated tests in Django [Django]

To avoid a FileField with a custom storage using AWS S3 (django-storages) to try authenticating when model is saved you can ...

To avoid a FileField with a custom storage using AWS S3 (django-storages) to try authenticating when model is saved you can ...

Django test utils to manage file storage side effects:

Django test utils to manage file storage side effects:

Solution for slow Django tests with custom localhost domain: #comment81243303_28864152

Solution for slow Django tests with custom localhost domain: #comment81243303_28864152

DRYer Django test code with subtests

DRYer Django test code with subtests

Python mutation testing library:

Python mutation testing library:

Be careful when comparing `Decimal` and `float`: `Decimal('3.0') == 3.0` but `Decimal('3.2') != 3.2`.

Be careful when comparing `Decimal` and `float`: `Decimal('3.0') == 3.0` but `Decimal('3.2') != 3.2`.

This is how you mock components when testing react with `jest`:

This is how you mock components when testing react with `jest`:

Speed up your Django automated tests with `python manage.py test --keepdb --parallel`

Speed up your Django automated tests with `python manage.py test --keepdb --parallel`

Testing image upload in Django Rest Framework:

Testing image upload in Django Rest Framework:

This is how to pass an argument to a `Makefile` command:

This is how to pass an argument to a `Makefile` command:

Use `jest --runInBand` for faster builds and to avoid out of memory errors in [CircleCI](

Use `jest --runInBand` for faster builds and to avoid out of memory errors in [CircleCI](

While developing, do `python manage.py --keepdb` to speed up your Django tests. This prevents the overhead of creating and destroying a new test DB

While developing, do `python manage.py --keepdb` to speed up your Django tests. This prevents the overhead of creating and destroying a new test DB

Use `subTest` in Python unittest when asserting inside loop: [#.425k66c9b](#.425k66c9b)

Use `subTest` in Python unittest when asserting inside loop: [#.425k66c9b](#.425k66c9b)

Found it useful?
Let’s put it to work.

Lessons about Tests (page 3)

How to write automated tests in Django [Django]

To avoid a FileField with a custom storage using AWS S3 (django-storages) to try authenticating when model is saved you can ...

Django test utils to manage file storage side effects:

Solution for slow Django tests with custom localhost domain: #comment81243303_28864152

DRYer Django test code with subtests

Python mutation testing library:

Be careful when comparing Decimal and float: Decimal('3.0') == 3.0 but Decimal('3.2') != 3.2.

This is how you mock components when testing react with jest:

Speed up your Django automated tests with python manage.py test --keepdb --parallel

Testing image upload in Django Rest Framework:

This is how to pass an argument to a Makefile command:

Use jest --runInBand for faster builds and to avoid out of memory errors in [CircleCI](

While developing, do python manage.py --keepdb to speed up your Django tests. This prevents the overhead of creating and destroying a new test DB

Use subTest in Python unittest when asserting inside loop: [#.425k66c9b](#.425k66c9b)

Found it useful? Let’s put it to work.

Be careful when comparing `Decimal` and `float`: `Decimal('3.0') == 3.0` but `Decimal('3.2') != 3.2`.

This is how you mock components when testing react with `jest`:

Speed up your Django automated tests with `python manage.py test --keepdb --parallel`

This is how to pass an argument to a `Makefile` command:

Use `jest --runInBand` for faster builds and to avoid out of memory errors in [CircleCI](

While developing, do `python manage.py --keepdb` to speed up your Django tests. This prevents the overhead of creating and destroying a new test DB

Use `subTest` in Python unittest when asserting inside loop: [#.425k66c9b](#.425k66c9b)

Found it useful?
Let’s put it to work.