Created utils.test.js #2128

[jamchoi]

Description

Add comprehensive unit tests for utility functions in client/app/utils/index.js.

More Details

This test suite covers all four exported utility functions: randomString, setCsrfToken, getPusher, and renderContent.

randomString

• Verifies format, length, and randomness across multiple invocations.

setCsrfToken

• Mocks DOM meta tag insertion.
• Tests correct setting of Axios header.
• Handles missing tag and token overwrite behavior.

getPusher

• Mocks window.Pusher and DOM meta tags.
• Ensures proper configuration via meta tag values.
• Tests edge cases where meta tags or Pusher are missing.

renderContent

• Validates sanitization of malicious HTML input.
• Handles React elements with prop overrides.
• Preserves non-string content like objects and nulls.
• Tests fragments, cloning behavior, and safe handling of undefined inputs.

Corresponding Issue

Attempted to complete #2128

Screenshots

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[julianguyen]

I'm seeing there are linting errors, if you scroll down here to your failing job:

/home/circleci/ifmeorg/ifme/client/app/utils/__tests__/utils.test.js
    2:1   error  `./index` import should occur after import of `react-dom/server`  import/order
    2:23  error  Unable to resolve path to module './index'                        import/no-unresolved
    2:23  error  Missing file extension for "./index"                              import/extensions
   21:31  error  Unary operator '++' used                                          no-plusplus
  100:25  error  Strings must use singlequote                                      quotes
  109:23  error  Missing an explicit type attribute for button                     react/button-has-type
  109:23  error  JSX not allowed in files with extension '.js'                     react/jsx-filename-extension
  139:69  error  Do not use Array index in keys                                    react/no-array-index-key

[julianguyen]

Any updates here?