FactoryCommandLoader example

namespace Symfony\Component\Console\Tests\CommandLoader;

use PHPUnit\Framework\TestCase;
use Symfony\Component\Console\Command\Command;
use Symfony\Component\Console\CommandLoader\FactoryCommandLoader;
use Symfony\Component\Console\Exception\CommandNotFoundException;

class FactoryCommandLoaderTest extends TestCase
{
    public function testHas()
    {
        $loader = new FactoryCommandLoader([
            'foo' => fn () => new Command('foo'),
            'bar' => fn () => new Command('bar'),
        ]);

        $this->assertTrue($loader->has('foo'));
        $this->assertTrue($loader->has('bar'));
        $this->assertFalse($loader->has('baz'));
    }

    public function testGet()
    {
        

public function testAllWithCommandLoader()
    {
        $application = new Application();
        $commands = $application->all();
        $this->assertInstanceOf(HelpCommand::class, $commands['help'], '->all() returns the registered commands');

        $application->add(new \FooCommand());
        $commands = $application->all('foo');
        $this->assertCount(1, $commands, '->all() takes a namespace as its first argument');

        $application->setCommandLoader(new FactoryCommandLoader([
            'foo:bar1' => fn () => new \Foo1Command(),
        ]));
        $commands = $application->all('foo');
        $this->assertCount(2, $commands, '->all() takes a namespace as its first argument');
        $this->assertInstanceOf(\FooCommand::class, $commands['foo:bar'], '->all() returns the registered commands');
        $this->assertInstanceOf(\Foo1Command::class, $commands['foo:bar1'], '->all() returns the registered commands');
    }

    public function testRegister()
    {
        $application = new Application();