FooCommand example

        $application = new Application();
        $this->assertStringEqualsFile(self::$fixturesPath.'/application_gethelp.txt', $this->normalizeLineBreaks($application->getHelp()), '->getHelp() returns a help message');
    }

    public function testAll()
    {
        $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');
    }

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

        $application->add(new \FooCommand());
        

$this->assertStringContainsString('list [--raw] [--format FORMAT] [--short] [--] [<namespace>]', $commandTester->getDisplay(), '->execute() returns a text help for the given command');
        $this->assertStringContainsString('<command', $commandTester->getDisplay(), '->execute() returns an XML help text if --format=xml is passed');
    }

    /** * @dataProvider provideCompletionSuggestions */
    public function testComplete(array $input, array $expectedSuggestions)
    {
        require_once realpath(__DIR__.'/../Fixtures/FooCommand.php');
        $application = new Application();
        $application->add(new \FooCommand());
        $tester = new CommandCompletionTester($application->get('help'));
        $suggestions = $tester->complete($input, 2);
        $this->assertSame($expectedSuggestions, $suggestions);
    }

    public static function provideCompletionSuggestions()
    {
        yield 'option --format' => [
            ['--format', ''],
            ['txt', 'xml', 'json', 'md', 'rst'],
        ];

        

EOF;

        $this->assertEquals($output, $commandTester->getDisplay(true));
    }

    public function testExecuteListsCommandsWithNamespaceArgument()
    {
        require_once realpath(__DIR__.'/../Fixtures/FooCommand.php');
        $application = new Application();
        $application->add(new \FooCommand());
        $commandTester = new CommandTester($command = $application->get('list'));
        $commandTester->execute(['command' => $command->getName(), 'namespace' => 'foo', '--raw' => true]);
        $output = <<<'EOF' foo:bar The foo:bar command EOF;

        $this->assertEquals($output, $commandTester->getDisplay(true));
    }

    public function testExecuteListsCommandsOrder()
    {