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    <title>DEV Community: Carolina 🇧🇷</title>
    <description>The latest articles on DEV Community by Carolina 🇧🇷 (@carolinagiorno).</description>
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      <title>Daily Challenge #1 - String Peeler</title>
      <dc:creator>Carolina 🇧🇷</dc:creator>
      <pubDate>Sun, 15 Sep 2019 01:17:39 +0000</pubDate>
      <link>https://dev.to/carolinagiorno/daily-challenge-1-string-peeler-14li</link>
      <guid>https://dev.to/carolinagiorno/daily-challenge-1-string-peeler-14li</guid>
      <description>&lt;p&gt;Depois de entrar no grupo da hashtag #100daysofcode acabei achando esse desafio do Dev.to e aproveitei para usar ao meu favor.&lt;br&gt;
O post desse desafio para quem ainda não conhece:&lt;/p&gt;


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  &lt;a href="/thepracticaldev/daily-challenge-1-string-peeler-4nep" class="ltag__link__link"&gt;
    &lt;div class="ltag__link__content"&gt;
      &lt;h2&gt;Daily Challenge #1 - String Peeler&lt;/h2&gt;
      &lt;h3&gt;dev.to staff ・ Jun 28 '19 ・ 1 min read&lt;/h3&gt;
      &lt;div class="ltag__link__taglist"&gt;
        &lt;span class="ltag__link__tag"&gt;#challenge&lt;/span&gt;
      &lt;/div&gt;
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  &lt;/a&gt;
&lt;/div&gt;


&lt;p&gt;Vamos ao código!&lt;br&gt;
&lt;/p&gt;

&lt;div class="highlight"&gt;&lt;pre class="highlight python"&gt;&lt;code&gt;&lt;span class="k"&gt;def&lt;/span&gt; &lt;span class="nf"&gt;stringpeeler&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="n"&gt;entrada&lt;/span&gt;&lt;span class="p"&gt;):&lt;/span&gt;
    &lt;span class="n"&gt;saida&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="n"&gt;entrada&lt;/span&gt;&lt;span class="p"&gt;[&lt;/span&gt;&lt;span class="mi"&gt;1&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt;&lt;span class="nb"&gt;len&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="n"&gt;entrada&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;&lt;span class="o"&gt;-&lt;/span&gt;&lt;span class="mi"&gt;1&lt;/span&gt;&lt;span class="p"&gt;]&lt;/span&gt;
    &lt;span class="k"&gt;return&lt;/span&gt; &lt;span class="n"&gt;saida&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;


&lt;p&gt;Como achei o desafio simples demais, acabei aproveitando pra aprender um pouco de TDD e mexer com a biblioteca pytest.&lt;br&gt;
&lt;/p&gt;
&lt;div class="highlight"&gt;&lt;pre class="highlight python"&gt;&lt;code&gt;&lt;span class="c1"&gt;# Dev.to Daily Challenge #1 - String Peeler
# https://dev.to/thepracticaldev/daily-challenge-1-string-peeler-4nep
# stringpeeler.py
&lt;/span&gt;
&lt;span class="kn"&gt;import&lt;/span&gt; &lt;span class="nn"&gt;pytest&lt;/span&gt;

&lt;span class="k"&gt;def&lt;/span&gt; &lt;span class="nf"&gt;stringpeeler&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="n"&gt;entrada&lt;/span&gt;&lt;span class="p"&gt;):&lt;/span&gt;
    &lt;span class="k"&gt;if&lt;/span&gt; &lt;span class="ow"&gt;not&lt;/span&gt; &lt;span class="nb"&gt;isinstance&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="n"&gt;entrada&lt;/span&gt;&lt;span class="p"&gt;,&lt;/span&gt; &lt;span class="nb"&gt;str&lt;/span&gt;&lt;span class="p"&gt;):&lt;/span&gt;
        &lt;span class="k"&gt;raise&lt;/span&gt; &lt;span class="nb"&gt;TypeError&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="s"&gt;'A entrada deve ser uma string'&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;
    &lt;span class="k"&gt;if&lt;/span&gt; &lt;span class="nb"&gt;len&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="n"&gt;entrada&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;&lt;span class="o"&gt;&amp;lt;&lt;/span&gt;&lt;span class="mi"&gt;3&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt;
        &lt;span class="k"&gt;return&lt;/span&gt; &lt;span class="nb"&gt;ValueError&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="s"&gt;'A entrada deve ter no mínimo 3 caracteres'&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;
    &lt;span class="n"&gt;saida&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="n"&gt;entrada&lt;/span&gt;&lt;span class="p"&gt;[&lt;/span&gt;&lt;span class="mi"&gt;1&lt;/span&gt;&lt;span class="p"&gt;:&lt;/span&gt;&lt;span class="nb"&gt;len&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="n"&gt;entrada&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;&lt;span class="o"&gt;-&lt;/span&gt;&lt;span class="mi"&gt;1&lt;/span&gt;&lt;span class="p"&gt;]&lt;/span&gt;
    &lt;span class="k"&gt;return&lt;/span&gt; &lt;span class="n"&gt;saida&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;


&lt;p&gt;E o arquivo de testes:&lt;br&gt;
&lt;/p&gt;
&lt;div class="highlight"&gt;&lt;pre class="highlight python"&gt;&lt;code&gt;&lt;span class="c1"&gt;# Dev.to Daily Challenge #1 - String Peeler
# https://dev.to/thepracticaldev/daily-challenge-1-string-peeler-4nep
&lt;/span&gt;&lt;span class="kn"&gt;import&lt;/span&gt; &lt;span class="nn"&gt;pytest&lt;/span&gt;
&lt;span class="kn"&gt;from&lt;/span&gt; &lt;span class="nn"&gt;stringpeeler&lt;/span&gt; &lt;span class="kn"&gt;import&lt;/span&gt; &lt;span class="n"&gt;stringpeeler&lt;/span&gt;

&lt;span class="c1"&gt;#TDD Training
&lt;/span&gt;&lt;span class="n"&gt;NOT_STRING&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="mi"&gt;3524&lt;/span&gt;
&lt;span class="n"&gt;EMPTY_STRING&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="s"&gt;""&lt;/span&gt;
&lt;span class="n"&gt;TOO_SHORT_STRING&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="s"&gt;"ab"&lt;/span&gt;
&lt;span class="n"&gt;TEST_STRING&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="s"&gt;"zabcdey"&lt;/span&gt;

&lt;span class="k"&gt;def&lt;/span&gt; &lt;span class="nf"&gt;test_ifString&lt;/span&gt;&lt;span class="p"&gt;():&lt;/span&gt;
    &lt;span class="k"&gt;with&lt;/span&gt; &lt;span class="n"&gt;pytest&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="n"&gt;raises&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nb"&gt;TypeError&lt;/span&gt;&lt;span class="p"&gt;):&lt;/span&gt;
        &lt;span class="n"&gt;value&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="n"&gt;stringpeeler&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="n"&gt;NOT_STRING&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;

&lt;span class="k"&gt;def&lt;/span&gt; &lt;span class="nf"&gt;test_emptyString&lt;/span&gt;&lt;span class="p"&gt;():&lt;/span&gt;
    &lt;span class="k"&gt;with&lt;/span&gt; &lt;span class="n"&gt;pytest&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="n"&gt;raises&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nb"&gt;ValueError&lt;/span&gt;&lt;span class="p"&gt;):&lt;/span&gt;
        &lt;span class="n"&gt;value&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="n"&gt;stringpeeler&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="n"&gt;EMPTY_STRING&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;

&lt;span class="k"&gt;def&lt;/span&gt; &lt;span class="nf"&gt;test_tooShortString&lt;/span&gt;&lt;span class="p"&gt;():&lt;/span&gt;
    &lt;span class="k"&gt;with&lt;/span&gt; &lt;span class="n"&gt;pytest&lt;/span&gt;&lt;span class="p"&gt;.&lt;/span&gt;&lt;span class="n"&gt;raises&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="nb"&gt;ValueError&lt;/span&gt;&lt;span class="p"&gt;):&lt;/span&gt;
        &lt;span class="n"&gt;value&lt;/span&gt; &lt;span class="o"&gt;=&lt;/span&gt; &lt;span class="n"&gt;stringpeeler&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="n"&gt;TOO_SHORT_STRING&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt;

&lt;span class="k"&gt;def&lt;/span&gt; &lt;span class="nf"&gt;test_stringPeeler&lt;/span&gt;&lt;span class="p"&gt;():&lt;/span&gt;
    &lt;span class="k"&gt;assert&lt;/span&gt; &lt;span class="n"&gt;stringpeeler&lt;/span&gt;&lt;span class="p"&gt;(&lt;/span&gt;&lt;span class="n"&gt;TEST_STRING&lt;/span&gt;&lt;span class="p"&gt;)&lt;/span&gt; &lt;span class="o"&gt;==&lt;/span&gt; &lt;span class="s"&gt;"abcde"&lt;/span&gt;
&lt;/code&gt;&lt;/pre&gt;&lt;/div&gt;


&lt;p&gt;Usei como referência essa série de posts de TDD em pytest para iniciantes, que é bem educativo e fácil de acompanhar.&lt;/p&gt;


&lt;div class="ltag__link"&gt;
  &lt;a href="/wangonya" class="ltag__link__link"&gt;
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  &lt;/a&gt;
  &lt;a href="/wangonya/python-tdd-with-pytest-----getting-started-4l07" class="ltag__link__link"&gt;
    &lt;div class="ltag__link__content"&gt;
      &lt;h2&gt;Python TDD with Pytest  -- Getting Started&lt;/h2&gt;
      &lt;h3&gt;Kinyanjui Wangonya ・ Jan 28 '19 ・ 2 min read&lt;/h3&gt;
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        &lt;span class="ltag__link__tag"&gt;#python&lt;/span&gt;
        &lt;span class="ltag__link__tag"&gt;#tdd&lt;/span&gt;
        &lt;span class="ltag__link__tag"&gt;#tutorial&lt;/span&gt;
        &lt;span class="ltag__link__tag"&gt;#learning&lt;/span&gt;
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&lt;/div&gt;



&lt;p&gt;Não sei se vou conseguir fazer todo dia, mas estou me divertindo por enquanto. Espero ficar craque em TDD até o último desafio!&lt;/p&gt;

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