trait VarDumperTestTrait

trait VarDumperTestTrait {
    
    /**
     * @internal
     */
    private array $varDumperConfig = [
        'casters' => [],
        'flags' => null,
    ];
    
    /**
     * @param array<string, callable> $casters
     */
    protected function setUpVarDumper(array $casters, ?int $flags = null) : void {
        $this->varDumperConfig['casters'] = $casters;
        $this->varDumperConfig['flags'] = $flags;
    }
    
    /**
     * @after
     */
    protected function tearDownVarDumper() : void {
        $this->varDumperConfig['casters'] = [];
        $this->varDumperConfig['flags'] = null;
    }
    public function assertDumpEquals(mixed $expected, mixed $data, int $filter = 0, string $message = '') {
        $this->assertSame($this->prepareExpectation($expected, $filter), $this->getDump($data, null, $filter), $message);
    }
    public function assertDumpMatchesFormat(mixed $expected, mixed $data, int $filter = 0, string $message = '') {
        $this->assertStringMatchesFormat($this->prepareExpectation($expected, $filter), $this->getDump($data, null, $filter), $message);
    }
    protected function getDump(mixed $data, string|int|null $key = null, int $filter = 0) : ?string {
        if (null === ($flags = $this->varDumperConfig['flags'])) {
            $flags = getenv('DUMP_LIGHT_ARRAY') ? CliDumper::DUMP_LIGHT_ARRAY : 0;
            $flags |= getenv('DUMP_STRING_LENGTH') ? CliDumper::DUMP_STRING_LENGTH : 0;
            $flags |= getenv('DUMP_COMMA_SEPARATOR') ? CliDumper::DUMP_COMMA_SEPARATOR : 0;
        }
        $cloner = new VarCloner();
        $cloner->addCasters($this->varDumperConfig['casters']);
        $cloner->setMaxItems(-1);
        $dumper = new CliDumper(null, null, $flags);
        $dumper->setColors(false);
        $data = $cloner->cloneVar($data, $filter)
            ->withRefHandles(false);
        if (null !== $key && null === ($data = $data->seek($key))) {
            return null;
        }
        return rtrim($dumper->dump($data, true));
    }
    private function prepareExpectation(mixed $expected, int $filter) : string {
        if (!\is_string($expected)) {
            $expected = $this->getDump($expected, null, $filter);
        }
        return rtrim($expected);
    }

}