seiya2130

<ul data-line="0" class="code-line">
<li data-line="0" class="code-line">RSpecでテストダブル(テストが依存しているコンポーネントを置き換える代用品)の1種</li>
<li data-line="1" class="code-line">指定したクラスのインスタンスのインターフェースと一致しているかチェックする</li>
<li data-line="2" class="code-line">実際に存在しているメソッド名を使うため、間違ったメソッド名の使用を避けることができる</li>
</ul>
<h2 id="%E6%A4%9C%E8%A8%BC" data-line="4" class="code-line">
<a class="header-anchor-link" href="#%E6%A4%9C%E8%A8%BC" aria-hidden="true"></a> 検証</h2>
<p data-line="6" class="code-line"><span class="embed-block zenn-embedded zenn-embedded-card"><iframe id="zenn-embedded__6450bd93805bd" src="https://embed.zenn.studio/card#zenn-embedded__6450bd93805bd" data-content="https%3A%2F%2Fgithub.com%2Fseiya2130%2FLab%2Fcommit%2F447fbee802b5ee853414d92c36def16b1dcfb8ad%23diff-bfea5371fde754be8bbde2ed0672d3fca018f0e5d22897804d3118ec57c6d518" frameborder="0" scrolling="no" loading="lazy"></iframe></span><a href="https://github.com/seiya2130/Lab/commit/447fbee802b5ee853414d92c36def16b1dcfb8ad#diff-bfea5371fde754be8bbde2ed0672d3fca018f0e5d22897804d3118ec57c6d518" style="display:none" target="_blank" rel="nofollow noopener noreferrer">https://github.com/seiya2130/Lab/commit/447fbee802b5ee853414d92c36def16b1dcfb8ad#diff-bfea5371fde754be8bbde2ed0672d3fca018f0e5d22897804d3118ec57c6d518</a></p>
<p data-line="8" class="code-line">存在しないメソッドを使うとエラー</p>
<p data-line="10" class="code-line"><img src="https://storage.googleapis.com/zenn-user-upload/34eb8370b983-20250413.png" loading="lazy" class="md-img"></p>
<h2 id="%E5%8F%82%E8%80%83" data-line="12" class="code-line">
<a class="header-anchor-link" href="#%E5%8F%82%E8%80%83" aria-hidden="true"></a> 参考</h2>
<p data-line="14" class="code-line"><span class="embed-block zenn-embedded zenn-embedded-card"><iframe id="zenn-embedded__d193b388f40a8" src="https://embed.zenn.studio/card#zenn-embedded__d193b388f40a8" data-content="https%3A%2F%2Frspec.info%2Ffeatures%2F3-12%2Frspec-mocks%2Fverifying-doubles%2Finstance-doubles%2F" frameborder="0" scrolling="no" loading="lazy"></iframe></span><a href="https://rspec.info/features/3-12/rspec-mocks/verifying-doubles/instance-doubles/" style="display:none" target="_blank" rel="nofollow noopener noreferrer">https://rspec.info/features/3-12/rspec-mocks/verifying-doubles/instance-doubles/</a><br style="display:none">
<span class="embed-block zenn-embedded zenn-embedded-card"><iframe id="zenn-embedded__6bcb39bc10dae" src="https://embed.zenn.studio/card#zenn-embedded__6bcb39bc10dae" data-content="https%3A%2F%2Fja.wikipedia.org%2Fwiki%2F%25E3%2583%2586%25E3%2582%25B9%25E3%2583%2588%25E3%2583%2580%25E3%2583%2596%25E3%2583%25AB" frameborder="0" scrolling="no" loading="lazy"></iframe></span><a href="https://ja.wikipedia.org/wiki/%E3%83%86%E3%82%B9%E3%83%88%E3%83%80%E3%83%96%E3%83%AB" style="display:none" target="_blank" rel="nofollow noopener noreferrer">https://ja.wikipedia.org/wiki/テストダブル</a></p>
