public function validate($input)
{
if (!$this->isArray($input)) {
throw new InvalidInputException("The input must be an array");
}
if (!$this->keyExists($this->key, $input)) {
throw new InvalidInputException("The key does not exists");
}
return v::notEmpty()->validate($input[$this->key]);
}
/**
* @dataProvider providerForEmpty
*/
public function testInvalidStringShouldFailValidation($input)
{
$this->assertFalse(v::notEmpty()->validate($input));
}