Simple Automatic Test for Laravel Nova Resources (Updated for Nova 4)

NovaResourcesTest.php

<?php

namespace Tests\Feature;

use Tests\TestCase;
use Laravel\Nova\Http\Requests\NovaRequest;
use Laravel\Nova\Nova;

class NovaResourcesTest extends TestCase
{
    public function testAllNovaResources()
    {
        // This test only instanciates one resource of each type
        // It is meant for testing only basic syntax errors
        // Nova resource behaviours should be manually tested
        
        Nova::resourcesIn(app_path('Nova'));

        $resources = collect(Nova::$resources);
                
        $this->assertTrue($resources->count() > 0);

        $resources->each(function($resourceClass) {
            $this->executeTestFor($resourceClass);
        });
    }

    private function executeTestFor($resourceClass)
    {
        // Asserts the model asociated to the nova resource can be instantiated
        $model = app($resourceClass::$model);
        $this->assertNotNull($model);

        // Instantiates the nova resource
        $resource = new $resourceClass($model);
        
        $this->assertResourceMethod($resource, 'fields');
        $this->assertResourceMethod($resource, 'cards');
        $this->assertResourceMethod($resource, 'filters');
        $this->assertResourceMethod($resource, 'lenses');
        $this->assertResourceMethod($resource, 'actions');
    }

    public function assertResourceMethod($resource, $methodName)
    {
        $request = new NovaRequest();

        $array = $resource->{$methodName}($request);
        
        $this->assertIsArray($array);
    }
}

assertInternalType has been removed as of PHPUnit 9, so line 51 will have to be changed to $this->assertIsArray($array);