public void ShouldReturnPrimesUnder30()
{
// Arrange
var primeNumbers = new PrimeNumbers();
var primesReturned = false;
var primesGenerated = new List <int>();
// Primes taken from https://oeis.org/A000040
var primesUnder30 = new List <int>
{
2,
3,
5,
7,
11,
13,
17,
19,
23,
29
};
// Act
foreach (var prime in primeNumbers.Generate(30))
{
Assert.IsTrue(primesUnder30.Contains(prime), $"Unexpected prime: {prime}");
primesGenerated.Add(prime);
primesReturned = true;
}
// Assert
Assert.IsTrue(primesReturned, "Expected the on prime action to be called.");
Assert.IsFalse(primesUnder30.Except(primesGenerated).Any(), "Expected all primes under 30 to be generated.");
}