Provide example of importing a namespaced function

Importing namespaced functions was made available with php/php-src#526. It would be super helpful to provide an example not using classes, but using use function instead.

[samsonasik]

Hi @JHabdas ,

Thank you for the suggestion. use function is do-able, the only drawback is use function is not patch-able by kahlan.

Please provide PR if you have suggested example of using it.

[samsonasik]

see issue kahlan/kahlan#232

Please provide PR if you have suggested example of using it.

As soon as I can grok how to do it, I will gladly. 😄 Unlike the above issue, I'm not using an autoloader. Here's what I'm trying to accomplish:

├── spec
│   └── hyperdrive.spec.php
├── src
│   ├── hyperdrive.php

Where the contents of each file are like:

namespace hyperdrive;

function enter_hyperspace( $dark_energy ) {
  echo "<script>{$dark_energy}</script>";
}

namespace hyperdrive\spec;

use function hyperdrive\enter_hyperspace;

describe('hyperdrive', function () {
  describe('enter_hyperspace()', function () {
    it('echos an empty script given an empty string', function () {
      expect(
        enter_hyperspace('')
      )->toEcho('<script></script>');
    });
  });
});

Based PHP: Using namespaces it seems like the above should be supported. But when I unleash the test runner I receive the following message:

`Error` Code(0) with message "Call to undefined function hyperdrive\\enter_hyperspace()"

@samsonasik If you can point me in the right direction I will send up that PR.

[samsonasik]

You should can register the function under files under autoloader:

     "autoload": {
         "psr-4": {
             "App\\": "src/"
        },
        "files": [
            "src/hyperdrive.php"
        ]
     },

after added, you can run:

composer dump-autoload

@samsonasik worked like a charm! 🥇 let me get my first test integrated into the hyperdrive with this beautiful library and I'll send up that PR afterwards. thank you kindly for your help.

As promised: #9