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412 lines
13 KiB
412 lines
13 KiB
6 years ago
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<!doctype html>
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<html lang="en">
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<head>
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<meta charset="utf-8">
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<title>Filosofando sobre Tests</title>
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<meta name="description" content="A framework for easily creating beautiful presentations using HTML">
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<meta name="author" content="Hakim El Hattab">
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<meta name="apple-mobile-web-app-capable" content="yes">
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<body>
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<div class="reveal">
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<div class="slides">
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<section>
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<!-- <section data-background="_images/tdd-kentbeck-book.jpg" data-header> -->
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<section data-background="_images/tdd-kentbeck-book.jpg">
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<h1 class="semi-opaque">Filosofando sobre Testes</h1>
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</section>
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</section>
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<section>
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<section>
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<img src="_images/avatar-20170726.png" alt="Me" style="float:left;width:200px;" class="no-border">
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<div>
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<ul class="empty">
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<li>Júlio Biason</li>
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<li>Azion Technologies<img src="_images/azion-logo.png" alt="Azion logo" class='company-logo'></li>
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<li>@juliobiason</li>
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<li>https://functional.cafe/@juliobiason</li>
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<li>julio.biason@gmail.com</li>
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<li><a href="http://presentations.juliobiason.net">http://presentations.juliobiason.net</a></li>
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</ul>
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</div>
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</section>
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<section>
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<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'/>
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<aside class="notes">
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Eu sou famoso (ou era) por entrar eu reuniões, fazer uma
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pergunta e a reunião explodir em discussões (úteis, diga-se
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de passagem). Mas eu não fazia isso de propósito.
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</aside>
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</section>
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<section>
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<img src="_images/mini-hitler.jpg" alt="Me chamaram de Mini Hitler"/>
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</section>
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<section>
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<img src="_images/filho-do-capeta.jpg" alt="... mas hoje eu vim botar os filho dos outro no go horse." class='stretch'/>
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<aside class="notes">
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... mas hoje eu vim "botá os fio dos otro no Go Horse, fazê
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eles escrevê menos teste"
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</aside>
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</section>
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<section>
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<h2><span style="color:red">WARNING</span></h2>
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<img src="_images/patriarch.jpg" alt="... e eu sou meio não-ortodoxo sobre testes."/>
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</section>
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</section>
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<section>
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<section>
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<img src="_images/tdd-where-it-went-wrong.png" alt="TDD: Where it went wrong" class="stretch"/>
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<p>Ian Cooper: <a href="https://vimeo.com/68375232">"TDD, where did it all go wrong"</a></p>
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</section>
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<section>
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<h2>TDD</h2>
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<p>Kent Beck:</p>
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<ul>
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<li>"Run in isolation", nothing more, nothing less.</li>
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<li>"Avoid testing implementation details, test behaviours"</li>
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</ul>
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</section>
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<section>
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<h2>TDD</h2>
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<p>Discussões como "qual a unidade a ser testada" é que geraram
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coisas como BDD e ATDD (Acceptance Test-Driven Development).</p>
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</section>
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<section>
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<h2>TDD</h2>
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<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>
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<h1 class="fragment">SIM!</h1>
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</section>
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<section>
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<h2>TDD</h2>
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<p>Nossos testes End-to-End.</p>
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<aside class="notes">
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Explicação do que aconteceu com os testes do gerenciador de alertas.
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</aside>
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</section>
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</section>
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<section>
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<section>
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</section>
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</section>
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<section>
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<section>
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<h2>Exemplo</h2>
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<pre><code class="python">
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class Client:
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def __init__(self, name):
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self.name = name
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</code></pre>
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</section>
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<section>
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<h2>Exemplo</h2>
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<p>Novo requisito: "somente aceitar nomes válidos, que tem 2
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palavras ou mais."</p>
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</section>
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<section>
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<h2>Exemplo</h2>
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<p>SOLID principles:</p>
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<ul>
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<li><strong>SRP - Single Responsability Principle</strong></li>
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<li>OCP - Open/closed principle</li>
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<li>LSP - Liskov substitution principle (design by contract)</li>
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<li>ISP - Interface Segreation Principle</li>
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<li>DIP - Dependency Inversion Principle</li>
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</ul>
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</section>
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<section>
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<h2>Exemplo</h2>
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<pre><code class="python">
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def _multiple_names(name):
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split_names = name.split(' ')
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return len(split_names) > 1
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def _validate_name(name):
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if not _multiple_names(name):
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raise Exception("Invalid name")
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return name
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class Client:
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def __init__(self, name):
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self.name = _validate_name(name)
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</code></pre>
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</section>
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<section>
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<h2>Exemplo</h2>
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<pre><code class="python">
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import pytest
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def test_single_name():
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assert not _multiple_names('Cher')
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def test_multiple_name():
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assert _multiple_names('Julio Biason')
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</code></pre>
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</section>
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<section>
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<h2>Exemplo</h2>
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<pre><code class="python">
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def test_valid_name():
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_validate_name('Julio Biason')
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def test_invalid_name():
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with pytest.raises(Exception):
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_validate_name('Cher')
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</code></pre>
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</section>
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<section>
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<h2>Exemplo</h2>
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<pre><code class="python">
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def test_client_error():
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with pytest.raises(Exception):
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Client(name='Cher')
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def test_client():
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Client(name='Julio Biason')
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</code></pre>
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</section>
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<section>
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<h2>Exemplo</h2>
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<pre><code>
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$ pytest client.py
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==== test session starts ====
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rootdir: /home/jbiason/unitt, inifile:
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collected 6 items
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client.py ......
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==== 6 passed in 0.03 seconds ====
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</code></pre>
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</section>
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<section>
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<h2>Exemplo</h2>
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<pre><code>
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$ pytest --cov=client client.py
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==== test session starts ====
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plugins: cov-2.4.0
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collected 6 items
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client.py ......
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---- coverage: platform linux, python 3.4.3-final-0 ----
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Name Stmts Miss Cover
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-------------------------------
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client.py 25 0 100%
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==== 6 passed in 0.11 seconds ====
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</code></pre>
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</section>
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<section>
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<h2>Exemplo</h2>
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<p>"Não podemos perder a Cher, a Xuxa, a Madonna, a Björk e o String como clientes!"</p>
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</section>
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<section>
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<h2>Exemplo</h2>
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<pre><code class="python">
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class Client:
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def __init__(self, name):
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self.name = name
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</code></pre>
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</section>
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<section>
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<h2>Exemplo</h2>
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<pre><code>
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==== FAILURES ====
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____ test_client_error ____
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def test_client_error():
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with pytest.raises(Exception):
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> Client(name='Cher')
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E Failed: DID NOT RAISE <class 'Exception'>
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client.py:37: Failed
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==== 1 failed, 5 passed in 0.63 seconds ====
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</code></pre>
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</section>
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<section>
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<h2>Exemplo</h2>
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<pre><code>
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$ pytest client.py
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==== test session starts ====
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rootdir: /home/jbiason/unitt, inifile:
|
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plugins: cov-2.4.0
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collected 6 items
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client.py ......
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==== 6 passed in 0.03 seconds ====
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</code></pre>
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</section>
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<section>
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<h2>Exemplo</h2>
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<pre><code>
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$ pytest --cov=client client.py
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==== test session starts ====
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rootdir: /home/jbiason/unitt, inifile:
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|
plugins: cov-2.4.0
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||
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collected 6 items
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|
|
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client.py ......
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---- coverage: platform linux, python 3.4.3-final-0 ----
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Name Stmts Miss Cover
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-------------------------------
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client.py 24 0 100%
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==== 6 passed in 0.12 seconds ====
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</code></pre>
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</section>
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<section>
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<h2>Exemplo</h2>
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<p>Encontre o erro.</p>
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</section>
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</section>
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<section>
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<h2>Resumo</h2>
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<ul>
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<li>Escreva testes que verifiquem requisitos, não a
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implementação do requisito</li>
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<li>Implementação pode mudar, os testes não deveriam.</li>
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<li>Garanta que o teste dependa apenas de si mesmo
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e não de outros testes.</li>
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<li>Use cobertura (coverage) para identificar código
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a ser removido, não para escrever mais testes.</li>
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</ul>
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</section>
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<section data-background='_images/thats-all-folks.jpg'>
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<section>
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<h1 class="fragment semi-opaque">Perguntas?</h1>
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</section>
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</section>
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</div>
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</div>
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<script src="reveal.js/lib/js/head.min.js"></script>
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<script src="reveal.js/js/reveal.js"></script>
|
||
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<script>
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||
|
|
// Full list of configuration options available at:
|
||
|
|
// https://github.com/hakimel/reveal.js#configuration
|
||
|
|
Reveal.initialize({
|
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|
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controls: true,
|
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|
|
progress: true,
|
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|
|
history: true,
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center: true,
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||
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// showNotes: true,
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transition: 'slide', // none/fade/slide/convex/concave/zoom
|
||
|
|
|
||
|
|
// Optional reveal.js plugins
|
||
|
|
dependencies: [
|
||
|
|
{ src: 'reveal.js/lib/js/classList.js', condition: function() { return !document.body.classList; } },
|
||
|
|
{ src: 'reveal.js/plugin/markdown/marked.js', condition: function() { return !!document.querySelector( '[data-markdown]' ); } },
|
||
|
|
{ src: 'reveal.js/plugin/markdown/markdown.js', condition: function() { return !!document.querySelector( '[data-markdown]' ); } },
|
||
|
|
{ src: 'reveal.js/plugin/highlight/highlight.js', async: true, callback: function() { hljs.initHighlightingOnLoad(); } },
|
||
|
|
{ src: 'reveal.js/plugin/zoom-js/zoom.js', async: true },
|
||
|
|
{ src: 'reveal.js/plugin/notes/notes.js', async: true }
|
||
|
|
]
|
||
|
|
});
|
||
|
|
</script>
|
||
|
|
|
||
|
|
</body>
|
||
|
|
</html>
|