public void SumOfFibonacci_WithEvenValuesLE4Million_Is4613732()
{
var actual = Sequences.FibonacciNumbers()
.TakeWhile(fib => fib <= 4000000)
.Where(v => v % 2 == 0)
.Sum();
Assert.AreEqual(Answer, actual);
}
public void FirstTermOfFibonacciSequenceToContain3digts_IsThe12th()
{
var expected = 12;
var result = Sequences.FibonacciNumbers()
.TakeWhile(num => num < 100)
.LongCount() + 2;
Assert.AreEqual(expected, result);
}
public void SumOfFibonacci_WithValuesLE89_IsSomething()
{
var expected = new int[]
{
1, 2, 3, 5, 8, 13, 21, 34, 55, 89
}.Sum();
var actual = Sequences.FibonacciNumbers()
.TakeWhile(fib => fib <= 89)
.Sum();
Assert.AreEqual(expected, actual);
}
public void FirstTermOfFibonacciSequenceToContain1000digts_IsThe4782nd()
{
var expected = 4782;
var thousandDigitNumber = Sequences
.Repeat(new BigInteger(0))
.Take(999)
.Append(new BigInteger(1))
.FromDigits();
var result = Sequences.FibonacciNumbers()
.TakeWhile(num => num < thousandDigitNumber)
.LongCount() + 2;
Assert.AreEqual(expected, result);
}
