public void When_The_Start_Less_Than_Zero()
{
var instance = new FibonacciSequenceCalculator();
var result = instance.Evaluate(-1, 10);
result.ToArray();
Assert.Fail("Should have exceptioned...");
}
public void When_A_Simple_Small_Range_Is_Selected()
{
var instance = new FibonacciSequenceCalculator();
var result = instance.Evaluate(0, 11);
Assert.IsNotNull(result);
Assert.IsTrue(result.Any());
Assert.AreEqual("0", result.First());
Assert.AreEqual("8", result.Last());
Assert.AreEqual(7, result.Count());
Assert.AreEqual("0, 1, 1, 2, 3, 5, 8", String.Join(", ", result.ToArray()));
}
public void Then_The_Fibonacci_Values_Before_The_Start_Are_Skipped()
{
var instance = new FibonacciSequenceCalculator();
var result = instance.Evaluate(10, 10000);
Assert.IsNotNull(result);
Assert.IsTrue(result.Any());
Assert.AreEqual("13", result.First());
Assert.AreEqual("6765", result.Last());
// https://www.mathsisfun.com/numbers/fibonacci-sequence.html
Assert.AreEqual("13, 21, 34, 55, 89, 144, 233, 377, 610, 987, 1597, 2584, 4181, 6765", String.Join(", ", result.ToArray()));
}
public void When_A_Larger_Range_Is_Selected()
{
var instance = new FibonacciSequenceCalculator();
var result = instance.Evaluate(0, 10000);
Assert.IsNotNull(result);
Assert.IsTrue(result.Any());
Assert.AreEqual("0", result.First());
Assert.AreEqual("6765", result.Last());
// https://www.mathsisfun.com/numbers/fibonacci-sequence.html
Assert.AreEqual("0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377, 610, 987, 1597, 2584, 4181, 6765", String.Join(", ", result.ToArray()));
}
