setCommandLoader example

foreach ($this->kernel->getBundles() as $bundle) {
            if ($bundle instanceof Bundle) {
                try {
                    $bundle->registerCommands($this);
                } catch (\Throwable $e) {
                    $this->registrationErrors[] = $e;
                }
            }
        }

        if ($container->has('console.command_loader')) {
            $this->setCommandLoader($container->get('console.command_loader'));
        }

        if ($container->hasParameter('console.command.ids')) {
            $lazyCommandIds = $container->hasParameter('console.lazy_command.ids') ? $container->getParameter('console.lazy_command.ids') : [];
            foreach ($container->getParameter('console.command.ids') as $id) {
                if (!isset($lazyCommandIds[$id])) {
                    try {
                        $this->add($container->get($id));
                    } catch (\Throwable $e) {
                        $this->registrationErrors[] = $e;
                    }
                }

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();
        

        try {
            $this->kernel->boot();
        } catch (Exception $e) {
            $this->kernel->boot(true);
            $formatter = $this->getHelperSet()->get('formatter');
            $output->writeln($formatter->formatBlock('WARNING! ' . $e->getMessage() . ' in ' . $e->getFile(), 'error'));
            $this->skipDatabase = true;
        }

        if (!$this->commandsRegistered) {
            $this->setCommandLoader($this->kernel->getContainer()->get('console.command_loader'));

            if (!\in_array($input->getFirstArgument(), self::IMPORTANT_COMMANDS, true)) {
                $this->registerCommands($output);
            }

            $this->commandsRegistered = true;
        }

        return parent::doRun($input, $output);
    }