public void IsMultipleOfFive_WhenGivenNonMultipleOfFive_ShouldReturnFalse()
{
const Int32 value = 6;
Boolean actual = IntegerHelper.IsMultipleOfFive(value);
Assert.That(actual, Is.False);
}
public void IsMultipleOfThree_WhenGivenAMultipleOfThree_ShouldReturnTrue()
{
const Int32 value = 6;
Boolean actual = IntegerHelper.IsMultipleOfThree(value);
Assert.That(actual, Is.True);
}
public void SumRange_ShouldSumGivenRange()
{
const Int32 initial = 1;
const Int32 maximum = 10;
const Int32 expected = 45;
// Int32[] values = {1, 2, 3, 4, 5, 6, 7, 8, 9};
Int32 actual = IntegerHelper.SumRange(initial, maximum);
Assert.That(actual, Is.EqualTo(expected));
}
public void GetRange_WhenGivenAMinimumAndMaximumValue_ShouldReturnRangeOfIntegersBetweenValues()
{
const Int32 initial = 1;
const Int32 maximum = 10;
Int32[] values = { 1, 2, 3, 4, 5, 6, 7, 8, 9 };
Int32[] actual = IntegerHelper.GetRange(initial, maximum).ToArray();
Assert.That(actual, Is.Not.Empty);
Assert.That(actual, Is.EqualTo(values));
}
public void SumRange_WithGivenConditions_ShouldReturnSumOfRange()
{
const Int32 initial = 1;
const Int32 maximum = 10;
const Int32 expected = 23;
//Int32[] values = { 3, 5, 6, 9 };
Func <Int32, Boolean>[] conditions = { IntegerHelper.IsMultipleOfThree, IntegerHelper.IsMultipleOfFive };
Int32 actual = IntegerHelper.SumRange(initial, maximum, conditions);
Assert.That(actual, Is.EqualTo(expected));
}
public void GetRange_WhenGivenStartAndMaximumValueWithConditions_ShouldReturnRangeOfIntegersMatchingThoseConditions()
{
const Int32 initial = 1;
const Int32 maximum = 10;
Int32[] values = { 3, 5, 6, 9 };
Func <Int32, Boolean>[] conditions = { IntegerHelper.IsMultipleOfThree, IntegerHelper.IsMultipleOfFive };
Int32[] actual = IntegerHelper.GetRange(initial, maximum, conditions).ToArray();
Assert.That(actual, Is.Not.Empty);
Assert.That(actual, Is.EqualTo(values));
}
public static void Main(string[] args)
{
Console.Title = "Problem One: Sum all multiples of 3 and 5 below 1000.";
/*
* Problem One:
*
* If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23.
* Find the sum of all the multiples of 3 or 5 below 1000.
*/
Func <Int32, Boolean>[] conditions = { x => (x % 3) == 0, x => (x % 5) == 0 };
Stopwatch watch;
Boolean exit = false;
do
{
Console.Write("Enter a starting value: ");
String value = Console.ReadLine();
Int32 startingValue;
if (!Int32.TryParse(value, out startingValue))
{
Console.WriteLine("Bad argument given.");
Console.ReadKey(true);
return;
}
Console.Write("Enter a final value: ");
value = Console.ReadLine();
Int32 finalValue;
if (!Int32.TryParse(value, out finalValue))
{
Console.WriteLine("Bad argument given.");
Console.ReadKey(true);
return;
}
watch = Stopwatch.StartNew();
Console.WriteLine("Calculating sum...");
Int32 sum = IntegerHelper.SumRange(startingValue, finalValue, conditions);
watch.Stop();
Console.WriteLine("Completed in {0:##.000}ms. Sum from {1} to {2} is {3}",
watch.ElapsedMilliseconds,
startingValue,
finalValue,
sum);
Console.Write("Would you like to try again? [y/n] [default: y] ");
value = Console.ReadLine();
if (value != null && value.Equals("n", StringComparison.OrdinalIgnoreCase))
{
exit = true;
}
Console.Clear();
} while (!exit);
}
