title: cypress how to verify all dropdown items without selecting any item
body: <p>Below is my html for a dropdown control:
  <a href="https://i.stack.imgur.com/VBPwM.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/VBPwM.png" alt="enter image description here" /></a></p>
  <p>I want to verify that drop down has following items: [&quot;5&quot;,&quot;15&quot;,&quot;30&quot;,&quot;45&quot;]</p>
  <p>I have written following piece of code:</p>
  <pre><code>value=[&quot;5&quot;,&quot;15&quot;,&quot;30&quot;,&quot;45&quot;]
  cy.get(seelctor).invoke('val').should('deep.equal', value)
  </code></pre>
  <p>I do not want to select all of these items just want to verify that drop down has them.
  Also, My html does not has the value attribute. How do i assert based on text ??</p>