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ArgsStub example

use Symfony\Component\VarDumper\Cloner\VarCloner;
use Symfony\Component\VarDumper\Dumper\HtmlDumper;
use Symfony\Component\VarDumper\Test\VarDumperTestTrait;
use Symfony\Component\VarDumper\Tests\Fixtures\FooInterface;

class StubCasterTest extends TestCase
{
    use VarDumperTestTrait;

    public function testArgsStubWithDefaults($foo = 234, $bar = 456)
    {
        $args = [new ArgsStub([123], __FUNCTION__, __CLASS__)];

        $expectedDump = <<<'EODUMP' array:1 [ 0 => { $foo: 123 } ] EODUMP;

        $this->assertDumpMatchesFormat($expectedDump, $args);
    }

if (str_starts_with($label, "\0~collapse=0")) {
                        if ($collapse) {
                            $label = substr_replace($label, '1', 11, 1);
                        } else {
                            $collapse = true;
                        }
                    }
                    $label = substr_replace($label, "title=Stack level $j.&", 2, 0);
                }
                $f = $frames[$i - 1];
                if ($trace->keepArgs && !empty($f['args']) && $frame instanceof EnumStub) {
                    $frame->value['arguments'] = new ArgsStub($f['args'], $f['function'] ?? null, $f['class'] ?? null);
                }
            } elseif ('???' !== $lastCall) {
                $label = new ClassStub($lastCall);
                if (isset($label->attr['ellipsis'])) {
                    $label->attr['ellipsis'] += 2;
                    $label = substr_replace($prefix, "ellipsis-type=class&ellipsis={$label->attr['ellipsis']}&ellipsis-tail=1&title=Stack level $j.", 2, 0).$label->value.'()';
                } else {
                    $label = substr_replace($prefix, "title=Stack level $j.", 2, 0).$label->value.'()';
                }
            } else {
                $label = substr_replace($prefix, "title=Stack level $j.", 2, 0).$lastCall;
            }

try {
                $attr[$k] = 'ERRMODE' === $k ? $errmode : $c->getAttribute(\constant('PDO::ATTR_'.$k));
                if ($v && isset($v[$attr[$k]])) {
                    $attr[$k] = new ConstStub($v[$attr[$k]], $attr[$k]);
                }
            } catch (\Exception) {
            }
        }
        if (isset($attr[$k = 'STATEMENT_CLASS'][1])) {
            if ($attr[$k][1]) {
                $attr[$k][1] = new ArgsStub($attr[$k][1], '__construct', $attr[$k][0]);
            }
            $attr[$k][0] = new ClassStub($attr[$k][0]);
        }

        $prefix = Caster::PREFIX_VIRTUAL;
        $a += [
            $prefix.'inTransaction' => method_exists($c, 'inTransaction'),
            $prefix.'errorInfo' => $c->errorInfo(),
            $prefix.'attributes' => new EnumStub($attr),
        ];