[TESTS] Add some basic tests for ModelsCommand

[mfn]

Only add tests, no other functional change

Given that #865 was accepted and we've now the foundation for writing tests, I came up with some basic tests regarding the ModelsCommand.

The general idea is to show it's doable / easy (maybe not always 😄 ) and to inspire maybe others to contribute also to tests when they e.g. add/change features.

I added:

• a primitive general test for phpdoc \Barryvdh\LaravelIdeHelper\Tests\Console\ModelsCommand\GenerateBasicPhpdoc\Test::test
• one for custom date classes I recently added: \Barryvdh\LaravelIdeHelper\Tests\Console\ModelsCommand\CustomDate\Test::test

The tests might look a bit unconventional regarding:

• directory with a single test file and a single test method
• shared database migrations
  but
• separate models

The main reason is that ModelsCommand behaves differently when scanning a directory with multiple models It would (of course) always process all of them, which makes testing / mocking more cumbersome. So I decided to split this and better isolate this from each other.

Please note this is only a very small "get things going" test additional and by all means, we know there's much more to test (relations etc.).

Tests are skipped for Laravel < 6.0

I started out trying to get it work for Laravel 5.5 and 5.8 but ran into problems. After investing some time I decided not to invest more and skipped it.

Problems I had with 5.5

Tests didn't work, threw this error:

1) Barryvdh\LaravelIdeHelper\Tests\Console\ModelsCommand\CustomDate\Test::test

Symfony\Component\Console\Exception\InvalidOptionException: The "--realpath" option does not exist.
/home/travis/build/mfn/laravel-ide-helper/vendor/symfony/console/Input/ArrayInput.php:172
/home/travis/build/mfn/laravel-ide-helper/vendor/symfony/console/Input/ArrayInput.php:134
/home/travis/build/mfn/laravel-ide-helper/vendor/symfony/console/Input/Input.php:63
/home/travis/build/mfn/laravel-ide-helper/vendor/symfony/console/Command/Command.php:222
/home/travis/build/mfn/laravel-ide-helper/vendor/laravel/framework/src/Illuminate/Console/Command.php:167
/home/travis/build/mfn/laravel-ide-helper/vendor/symfony/console/Application.php:869
/home/travis/build/mfn/laravel-ide-helper/vendor/symfony/console/Application.php:223
/home/travis/build/mfn/laravel-ide-helper/vendor/symfony/console/Application.php:130
/home/travis/build/mfn/laravel-ide-helper/vendor/laravel/framework/src/Illuminate/Console/Application.php:82
/home/travis/build/mfn/laravel-ide-helper/vendor/laravel/framework/src/Illuminate/Console/Application.php:171
/home/travis/build/mfn/laravel-ide-helper/vendor/laravel/framework/src/Illuminate/Foundation/Console/Kernel.php:258
/home/travis/build/mfn/laravel-ide-helper/vendor/laravel/framework/src/Illuminate/Foundation/Testing/Concerns/InteractsWithConsole.php:18
/home/travis/build/mfn/laravel-ide-helper/vendor/orchestra/testbench-core/src/Traits/WithLoadMigrationsFrom.php:26
/home/travis/build/mfn/laravel-ide-helper/tests/Console/ModelsCommand/AbstractModelsCommand.php:13
/home/travis/build/mfn/laravel-ide-helper/tests/Console/ModelsCommand/CustomDate/Test.php:17

I googled and came to orchestral/testbench#153 and https://github.com/orchestral/testbench/tree/3.5#running-testing-migrations but still couldn't make it work, thus skipped it.

I actually got this working for https://github.com/rebing/graphql-laravel but checked the sources and it looked the same => all traces of this attempt are however already removed.

Problems I had with 5.8

The generated types are different 🤪:

1) Barryvdh\LaravelIdeHelper\Tests\Console\ModelsCommand\GenerateBasicPhpdoc\Test::test
Failed asserting that two strings are identical.
--- Expected
+++ Actual
@@ @@
 /**
  * Barryvdh\LaravelIdeHelper\Tests\Console\ModelsCommand\GenerateBasicPhpdoc\Models\Post
  *
- * @property integer $id
+ * @property int $id
  * @property string $title
  * @property string|null $body
- * @property integer $visible
+ * @property int $visible
  * @property string $publicated_at
  * @property \Illuminate\Support\Carbon|null $created_at
  * @property \Illuminate\Support\Carbon|null $updated_at

/home/travis/build/mfn/laravel-ide-helper/tests/Console/ModelsCommand/GenerateBasicPhpdoc/Test.php:88

I didn't wanted to invest too much here

[mfn]

@barryvdh all green here √

[barryvdh]

Thanks!