title: How to verify facebook jest is installed successfully
body: <p>I followed the instructions to install Facebook jest on <a href="https://facebook.github.io/jest/docs/getting-started.html#content" rel="nofollow">https://facebook.github.io/jest/docs/getting-started.html#content</a> :</p>
  
  <pre><code>npm install --save-dev jest-cli
  </code></pre>
  
  <p>After the install command I typed <code>jest</code> in the terminal, and press enter but It popped: </p>
  
  <pre><code>bash: jest: command not found.
  </code></pre>
  
  <p>But when I run the getting started sample by using <code>npm test</code> in the terminal, it worked well.</p>
  
  <p>So, how can I verify that Facebook jest is installed successfully?</p>