private void CalcTip()
{
_calculator.CalcTip();
tipTxt = Math.Round(_calculator.Tip, 2).ToString();
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("TipTxt"));
PropertyChanged?.Invoke(this, new PropertyChangedEventArgs("GrandTotalTxt"));
}
public void CalculateTipOneHundredPercent()
{
var tipCalculator = new TipCalculator
{
Total = 10,
TipPercent = 100
};
tipCalculator.CalcTip();
Assert.AreEqual(tipCalculator.Tip, 10);
}
public void CalculateTipZeroPercent()
{
var tipCalculator = new TipCalculator
{
Total = 10,
TipPercent = 0
};
tipCalculator.CalcTip();
Assert.AreEqual(tipCalculator.Tip, 0);
}
public void CalculateGrandTotal()
{
var tipCalculator = new TipCalculator
{
Total = 10,
TipPercent = 50
};
tipCalculator.CalcTip();
Assert.AreEqual(tipCalculator.GrandTotal, 15);
}
public void CalculateTipTwentyFivePercent()
{
var tipCalculator = new TipCalculator
{
Total = 10,
TipPercent = 25
};
tipCalculator.CalcTip();
Assert.AreEqual(tipCalculator.Tip, 2.50);
}
public void CalculateTipTenPercent()
{
var tipCalculator = new TipCalculator
{
Total = 10,
TipPercent = 10
};
tipCalculator.CalcTip();
Assert.AreEqual(tipCalculator.Tip, (decimal)1.00);
}
public void CalcTip_18PercentTip100Total_GrandTotal118()
{
var tipCalculator = new TipCalculator
{
Total = 100,
TipPercent = 18
};
tipCalculator.CalcTip();
Assert.AreEqual(decimal.Parse("118"), tipCalculator.GrandTotal);
}
public void SplitCheck_ThreePersons_TotalPersonEqualsOneHalfGrandTotal()
{
var tipCalculator = new TipCalculator
{
Total = (decimal)149.36,
TipPercent = 15,
NumberOfPersons = 3
};
tipCalculator.CalcTip();
tipCalculator.SplitGrandTotal();
Assert.AreEqual(tipCalculator.TotalPerPerson, Math.Round((tipCalculator.GrandTotal / 3), 2));
}
public void SplitCheck_OnePerson_TotalPersonEqualsGrandTotal()
{
var tipCalculator = new TipCalculator
{
Total = (decimal)149.36,
TipPercent = 15,
NumberOfPersons = 1
};
tipCalculator.CalcTip();
tipCalculator.SplitGrandTotal();
Assert.AreEqual(tipCalculator.TotalPerPerson, tipCalculator.GrandTotal);
}
public void RoundTipThenCalcTip_Total49_36TipPercent15_GrandTotal171_76TipShouldBe22_40()
{
var tipCalculator = new TipCalculator
{
Total = (decimal)149.36,
TipPercent = 15
};
tipCalculator.RoundTotal();
tipCalculator.CalcTip();
Assert.AreEqual((decimal)171.76, tipCalculator.GrandTotal);
Assert.AreEqual((decimal)22.40, tipCalculator.Tip);
}
public void RoundTip_Total49_36TipPercent18_GrandTotal176TipShouldBe26_64()
{
var tipCalculator = new TipCalculator
{
Total = (decimal)149.36,
TipPercent = 18
};
tipCalculator.CalcTip();
tipCalculator.RoundTotal();
Assert.AreEqual((decimal)176.00, tipCalculator.GrandTotal);
Assert.AreEqual((decimal)26.64, tipCalculator.Tip);
}
public void ResetCalculator_CalculatorPopulatedWithValidValues_CalculatorResetToOriginalState()
{
var tipCalculator = new TipCalculator
{
Total = 10,
TipPercent = 50
};
var newTipCalculator = new TipCalculator();
tipCalculator.CalcTip();
tipCalculator.Reset();
Assert.AreEqual(newTipCalculator.GrandTotal, tipCalculator.GrandTotal);
Assert.AreEqual(newTipCalculator.Tip, tipCalculator.Tip);
Assert.AreEqual(newTipCalculator.TipPercent, tipCalculator.TipPercent);
Assert.AreEqual(newTipCalculator.Total, tipCalculator.Total);
Assert.AreEqual(newTipCalculator.NumberOfPersons, tipCalculator.NumberOfPersons);
Assert.AreEqual(newTipCalculator.SavedGrandTotal, tipCalculator.SavedGrandTotal);
Assert.AreEqual(newTipCalculator.SavedTip, tipCalculator.SavedTip);
Assert.AreEqual(newTipCalculator.TotalPerPerson, tipCalculator.TotalPerPerson);
}