Call to function is_string() with string will always evaluate to true.

Parameter #1 $value of function strval expects bool|float|int|resource|string|null, mixed given.

Call to method PHPUnit\Framework\Assert::assertNotNull() with PhpCfdi\SatWsDescargaMasiva\RequestBuilder\FielRequestBuilder\Fiel will always evaluate to true.

Call to method PHPUnit\Framework\Assert::assertNotNull() with PhpCfdi\SatWsDescargaMasiva\RequestBuilder\FielRequestBuilder\Fiel will always evaluate to true.

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