public void TestLimits()
{
Assert.IsEmpty(FizzBuzz.Generate(0));
Assert.IsEmpty(FizzBuzz.Generate(-1));
Assert.IsEmpty(FizzBuzz.Generate(int.MinValue));
Assert.IsNotEmpty(FizzBuzz.Generate(1));
}
public void TestItems()
{
var sequence = FizzBuzz.Generate(1500);
var fizz = sequence.Where((item, index) => (index + 1) % 3 == 0 && (index + 1) % 5 != 0).Select(i => i);
var buzz = sequence.Where((item, index) => (index + 1) % 3 != 0 && (index + 1) % 5 == 0).Select(i => i);
var fizzBuzz = sequence.Where((item, index) => (index + 1) % 15 == 0).Select(i => i);
var numbers = sequence.Where((item, index) => (index + 1) % 3 != 0 && (index + 1) % 5 != 0).Select(i => i);
Assert.AreEqual(fizz.Count(), fizz.Count(item => item == "Fizz"));
Assert.AreEqual(buzz.Count(), buzz.Count(item => item == "Buzz"));
Assert.AreEqual(fizzBuzz.Count(), fizzBuzz.Count(item => item == "FizzBuzz"));
Assert.AreEqual(800, numbers.Count(item => int.TryParse(item, out int result)));
}
public void TestQuantities()
{
var sequence = FizzBuzz.Generate(1500);
Assert.AreEqual(500, sequence.Count(item => item.Contains("Fizz")));
Assert.AreEqual(300, sequence.Count(item => item.Contains("Buzz")));
Assert.AreEqual(100, sequence.Count(item => item == "FizzBuzz"));
Assert.AreEqual(800, sequence.Count(item => !item.Contains("Fizz") && !item.Contains("Buzz")));
var div3 = sequence.Where((item, index) => (index + 1) % 3 == 0).Select(i => i);
var div5 = sequence.Where((item, index) => (index + 1) % 5 == 0).Select(i => i);
var div15 = sequence.Where((item, index) => (index + 1) % 15 == 0).Select(i => i);
Assert.AreEqual(div3.Count(), div3.Count(item => item.Contains("Fizz")));
Assert.AreEqual(div3.Count() - 100, div3.Count(item => item == "Fizz"));
Assert.AreEqual(div5.Count(), div5.Count(item => item.Contains("Buzz")));
Assert.AreEqual(div5.Count() - 100, div5.Count(item => item == "Buzz"));
Assert.AreEqual(div15.Count(), div15.Count(item => item == "FizzBuzz"));
}
public void Should_return_empty_string_for_range_with_a_lower_bound_of_less_than_1()
{
var fizzBuzz = new FizzBuzz();
fizzBuzz.Generate(0, 0).ShouldBe(string.Empty);
}
public void Should_return_string_for_range(int lowerBound, int upperBound, string expected)
{
var fizzBuzz = new FizzBuzz();
fizzBuzz.Generate(lowerBound, upperBound).ShouldBe(expected);
}
public string TestSelectedItems(int index, int count)
{
var sequence = FizzBuzz.Generate(count);
return(sequence.Skip(index - 1).First());
}
