public void SubtractShouldReturnTheCalculatorInstance()
{
Calculator calculator2 = calculator.Subtract(four);
Assert.AreSame(calculator, calculator2);
}
public void DivideShouldReturnTheCalculatorInstance()
{
Calculator calculator2 = calculator.Divide(seven);
Assert.AreSame(calculator, calculator2);
}
public void ResetShouldReturnTheCalculatorInstance()
{
Calculator calculator2 = calculator.Reset();
Assert.AreSame(calculator, calculator2);
}
