public void When_Multiples_Of_Three_And_Five_Are_Subsituted()
{
var instance = new SubstitutionSequenceProcessor();
var result = instance.Process(0, 20);
//Object existance assertion
Assert.IsNotNull(result);
Assert.IsTrue(result.Any());
//Overall assertion
Assert.AreEqual(21, result.Count());
Assert.AreEqual("Z", result.Skip(15).First());
//Boundry assertion
Assert.AreEqual("0", result.First());
Assert.AreEqual("E", result.Last());
}
public void When_Fives_Are_Subsituted()
{
var instance = new SubstitutionSequenceProcessor();
var result = instance.Process(0, 20);
//Object existance assertion
Assert.IsNotNull(result);
Assert.IsTrue(result.Any());
//Overall assertion
Assert.AreEqual(21, result.Count());
Assert.AreEqual(3, result.Count(r => r == "E")); // Number of values divisible by 5
Assert.AreEqual("0 1 2 C 4 E C 7 8 C E 11 C 13 14 Z 16 17 C 19 E", String.Join(" ", result.ToArray()));
//Boundry assertion
Assert.AreEqual("0", result.First());
Assert.AreEqual("E", result.Last());
}