Adds unit tests to check that there are ARIA labels on the search buttons

[DeeDeeG]

Context

• Fixes #378
• Expanding on work by @hectorsector in PR #383 by adding unit tests

Summary of Changes

• Adds a test to search.feature and search_steps.rb
  • The test checks that the value of search buttons' aria-label HTML attribute is non-empty.

Checklist

• [N/A] Tested Mobile Responsiveness
• [x] Added Unit Tests
• [x] CI Passes
• [x] Deploys to Heroku on test Correctly (Maintainers will handle)
• [ ] Added Documentation (Service and Code when required)

Screenshots

Before

After

[tkwidmer]

deploying to review branch https://refuge-staging-14-pr-407.herokuapp.com/

[tkwidmer]

Thanks @DeeDeeG