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completed unit in unittest

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Julio Biason 8 years ago
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      unit-in-unittest.html

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</div>
</section>
<section>
<img src="_images/start-a-fight.jpg" alt="Eu faço perguntas em reuniões que eu não sei nada e reunião explode; não é de propósito" class='stretch'/>
</section>
<section>
<img src="_images/start-a-fight.jpg" alt="Eu faço perguntas em reuniões que eu não sei nada e reunião explode; não é de propósito" class='stretch'/>
</section>
<section>
<img src="_images/filho-do-capeta.jpg" alt="... mas hoje eu vim botar os filho dos outro no go horse." class='stretch'/>
</section>
</section>
<section>
<section>
<img src="_images/tdd-where-it-went-wrong.png" alt="TDD: Where it went wrong" class="stretch"/>
<p>Ian Cooper: <a href="https://vimeo.com/68375232">"TDD, where did it all go wrong"</a></p>
</section>
<section>
<p>Apresentação de Ian Cooper ressoou muito com experiências
feitas com TDD puro e "testes de ponta-a-ponta".</p>
</section>
</section>
<section>
<section>
<p>Mas antes...</p>
</section>
<section>
<p>Quem já</p>
<p class="fragment">falou de "testes de unidade"?</p>
<p class="fragment">discutiu a "unidade" dos testes de unidade?</p>
</section>
<section>
<img src="_images/faustao-arrow.png" alt="Errow" class="stretch"/>
</section>
<section>
<img src="_images/errou-rude.png" alt="Errou rude" class="stretch"/>
</section>
</section>
<section>
<section>
<h2>Exemplo</h2>
<pre><code class="python">
class Client:
def __init__(self, name):
self.name = name
</code></pre>
</section>
<section>
<h2>Exemplo</h2>
<p>Novo requisito: "somente aceitar nomes válidos, que tem 2
palavras ou mais."</p>
</section>
<section>
<h2>Exemplo</h2>
<p>SOLID principles:</p>
<ul>
<li><strong>SRP - Single Responsability Principle</strong></li>
<li>OCP - Open/closed principle</li>
<li>LSP - Liskov substitution principle (design by contract)</li>
<li>ISP - Interface Segreation Principle</li>
<li>DIP - Dependency Inversion Principle</li>
</ul>
</section>
<section>
<h2>Exemplo</h2>
<pre><code class="python">
def _multiple_names(name):
split_names = name.split(' ')
return len(split_names) > 1
def _validate_name(name):
if not _multiple_names(name):
raise Exception("Invalid name")
return name
class Client:
def __init__(self, name):
self.name = _validate_name(name)
</code></pre>
</section>
<section>
<h2>Exemplo</h2>
<pre><code class="python">
import pytest
def test_single_name():
assert not _multiple_names('Cher')
def test_multiple_name():
assert _multiple_names('Julio Biason')
</code></pre>
</section>
<section>
<h2>Exemplo</h2>
<pre><code class="python">
def test_valid_name():
_validate_name('Julio Biason')
def test_invalid_name():
with pytest.raises(Exception):
_validate_name('Cher')
</code></pre>
</section>
<section>
<h2>Exemplo</h2>
<pre><code class="python">
def test_client_error():
with pytest.raises(Exception):
Client(name='Cher')
def test_client():
Client(name='Julio Biason')
</code></pre>
</section>
<section>
<img src="_images/filho-do-capeta.jpg" alt="... mas hoje eu vim botar os filho dos outro no go horse." class='stretch'/>
</section>
<section>
<h2>Exemplo</h2>
<pre><code>
$ pytest client.py
==== test session starts ====
rootdir: /home/jbiason/unitt, inifile:
collected 6 items
client.py ......
==== 6 passed in 0.03 seconds ====
</code></pre>
</section>
<section>
<h2>Exemplo</h2>
<pre><code>
$ pytest --cov=client client.py
==== test session starts ====
plugins: cov-2.4.0
collected 6 items
client.py ......
---- coverage: platform linux, python 3.4.3-final-0 ----
Name Stmts Miss Cover
-------------------------------
client.py 25 0 100%
==== 6 passed in 0.11 seconds ====
</code></pre>
</section>
<section>
<h2>Exemplo</h2>
<p>"Não podemos perder a Cher, a Xuxa, a Madonna, a Björk e o String como clientes!"</p>
</section>
<section>
<h2>Exemplo</h2>
<pre><code class="python">
class Client:
def __init__(self, name):
self.name = name
</code></pre>
</section>
<section>
<h2>Exemplo</h2>
<pre><code>
==== FAILURES ====
____ test_client_error ____
def test_client_error():
with pytest.raises(Exception):
&gt; Client(name='Cher')
E Failed: DID NOT RAISE &lt;class 'Exception'>
client.py:37: Failed
==== 1 failed, 5 passed in 0.63 seconds ====
</code></pre>
</section>
<section>
<h2>Exemplo</h2>
<pre><code>
$ pytest client.py
==== test session starts ====
rootdir: /home/jbiason/unitt, inifile:
plugins: cov-2.4.0
collected 6 items
client.py ......
==== 6 passed in 0.03 seconds ====
</code></pre>
</section>
<section>
<h2>Exemplo</h2>
<pre><code>
$ pytest --cov=client client.py
==== test session starts ====
rootdir: /home/jbiason/unitt, inifile:
plugins: cov-2.4.0
collected 6 items
client.py ......
---- coverage: platform linux, python 3.4.3-final-0 ----
Name Stmts Miss Cover
-------------------------------
client.py 24 0 100%
==== 6 passed in 0.12 seconds ====
</code></pre>
</section>
<section>
<h2>Exemplo</h2>
<p>Encontre o erro.</p>
</section>
</section>
<section>
<section>
<img src="_images/tdd-where-it-went-wrong.png" alt="TDD: Where it went wrong" class="stretch"/>
<p>Ian Cooper: <a href="https://vimeo.com/68375232">"TDD, where did it all go wrong"</a></p>
</section>
<section>
<section>
<h2>TDD</h2>
<section>
<p>Apresentação de Ian Cooper ressoou muito com experiências
feitas com TDD puro e "testes de ponta-a-ponta".</p>
</section>
</section>
<p>Kent Beck:</p>
<section>
<section>
<p>Mas antes...</p>
</section>
<ul>
<li>"Run in isolation", nothing more, nothing less.</li>
<li>"Avoid testing implementation details, test behaviours"</li>
</ul>
</section>
<section>
<p>Quem já</p>
<p class="fragment">falou de "testes de unidade"?</p>
<p class="fragment">discutiu a "unidade" dos testes de unidade?</p>
</section>
<section>
<h2>TDD</h2>
<section>
<img src="_images/faustao-arrow.png" alt="Errow" class="stretch"/>
</section>
<p>Discussões como "qual a unidade a ser testada" é que geraram
coisas como BDD e ATDD (Acceptance Test-Driven Development).</p>
</section>
<section>
<img src="_images/errou-rude.png" alt="Errou rude" class="stretch"/>
</section>
</section>
<section>
<h2>TDD</h2>
<p>Reddit: <a href="https://www.reddit.com/r/django/comments/5bearg/should_i_write_unit_tests_for_djangos_built_in/" target="_blank">Devo escrever testes para a validação interna do Django?</a></p>
<h1 class="fragment">SIM!</h1>
</section>
<section>
<h2>TDD</h2>
<p>Nossos testes End-to-End.</p>
<aside class="notes">
Explicação do que aconteceu com os testes do gerenciador de alertas.
</aside>
</section>
<section data-background='_images/thats-all-folks.jpg'>
<section>
<h2>TDD</h2>
<p>SOLID principles:</p>
<ul>
<li>SRP - Single Responsability Principle</li>
<li>OCP - Open/closed principle</li>
<li><strong>LSP - Liskov substitution principle (design by contract)</strong></li>
<li>ISP - Interface Segreation Principle</li>
<li>DIP - Dependency Inversion Principle</li>
</ul>
<p>Funciona para aplicações inteiras; veja VIM vs NeoVim.</p>
</section>
</section>
<section data-background='_images/thats-all-folks.jpg'>
<section>
<h1 class="fragment semi-opaque">Perguntas?</h1>
</section>
</section>
</section>
</div>
</div>

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