/**
  * @test
  */
 public function I_can_create_it()
 {
     $minusOne = new NegativeNumberObject(-1);
     self::assertSame(-1, $minusOne->getValue());
     self::assertInstanceOf(NumberObject::getClass(), $minusOne);
     self::assertInstanceOf('\\Granam\\Number\\NegativeNumber', $minusOne);
     $floatMinusOne = new NegativeNumberObject(-1.0);
     self::assertSame(-1.0, $floatMinusOne->getValue());
     self::assertInstanceOf(NumberObject::getClass(), $floatMinusOne);
     self::assertInstanceOf('\\Granam\\Number\\NegativeNumber', $floatMinusOne);
     $zero = new NegativeNumberObject(0.0);
     self::assertSame(0.0, $zero->getValue());
     self::assertInstanceOf(NumberObject::getClass(), $zero);
     self::assertInstanceOf('\\Granam\\Number\\NegativeNumber', $zero);
 }