Tech Insights

<p>Great advice from top startups in 2016: </p>

<p>Django bugfix release: 1.10.5 - update your projects! </p>

<p>This is how you mock components when testing react with <code>jest</code>:</p> <p><code>// in your test file jest.mock('../path/to/component/to/Component.js');</code></p> <p>Create a <code>__mocks__</code> folder in the same directory of the component you want to test and a file with the same name of the component inside it:</p> <p><code>// __mocks__/Component.js import React from 'react'; export default function mock() { return (&lt;span&gt;Component mock&lt;/span&gt;); }</code></p>

<p>React tip: the solution to “how do I avoid passing props many levels down” can be surprisingly simple: </p>

<p>simple automated solution for dealing with trolls and toxic comments on your comments session: everyone has to rate before commenting and helps stoping hate speech</p>

<p>Want to exclude a directory from <code>git diff</code>? Use <code>git diff old new --name-only | grep -v '/tests/' | xargs git diff old new --</code>. Replace old/new with your branches. From: </p>

<p>On Django, validate ZIP codes, states, social security numbers and more with django-localflavor: </p>

<p>If there is an error with webpack build it will not stop your CI from deploying. Always use --bail </p>

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<p>On Django templates, avoid nested <code>for</code>s on simple cases by using <code>ifchanged</code> block tag: #ifchanged</p>

<p>Name your tabs for better organizing opened tabs (great for meetings) </p>

<p>The role of a senior developer </p>

<p>Speed up your Django automated tests with <code>python manage.py test --keepdb --parallel</code></p>

<p>Testing image upload in Django Rest Framework: </p>

<p>This is how to pass an argument to a <code>Makefile</code> command:</p> <p><code>ARG := $(word 2, $(MAKECMDGOALS) ) test: python manage.py test $(ARG) --parallel --keepdb</code> Use like this: <code>make test app.tests</code></p>

<p>On a Django test, get the HTML content of an e-mail with <code>content, mimetype = mail.outbox[0].alternatives[0]</code></p>

<p>List of Python API Wrappers </p>

<p>Use Hashids to generate short obfuscated strings from IDs. Useful for URL shorteners and human friendly IDs: </p>

<p>Audit web apps performance with Google Lighthouse </p>

<p>Use <code>jest --runInBand</code> for faster builds and to avoid out of memory errors in [CircleCI](</p>

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

<p>Use this lib to estimate password strength in Python: </p>

<p>Great way to learn Flexbox: </p>

<p>Functional pattern matching in Python </p>