Testing the private/protected methods of a PHP Trait

by | Oct 29, 2024 | IT Tips | 0 comments

The Trait

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<?php
 
declare(strict_types=1);
 
namespace App\Lib\Help\Traits;
 
trait HelpServiceShellExecTrait
{
    protected function shellExec(string $cmd)
    {
        // redirect stderr so we can see the output
        // if the command fails
        return trim((string) shell_exec(sprintf('%s 2>&1', $cmd)));
    }
}

The Test

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<?php
 
namespace App\Test\TestCase\Lib\Help;
 
use App\Lib\Help\Traits\HelpServiceShellExecTrait;
use Cake\TestSuite\TestCase;
use ReflectionObject;
 
class HelpServiceTest extends TestCase
{
    public function testShellExecOnHelpServiceServer()
    {
        $class = new class {
            use HelpServiceShellExecTrait;
        };
 
        $reflected = new ReflectionObject($class);
 
        $myMethod = $reflected->getMethod('shellExec');
 
        $myMethod->setAccessible(true);
 
        $result = $myMethod->invokeArgs($class, ["echo \"hi\"\n\n"]);
 
        $this->assertEquals("hi", $result);
    }
}

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