public void CountFrequencySorted()
{
const int repetitionCount = 3;
var input = new[] { 1, 1, 1, 2, 2, 3, 3, 3 };
const int expected = 2;
var actual = MissingNumber.CountFrequency(repetitionCount, input);
Assert.AreEqual(expected, actual);
}
public void CountFrequencyUnsorted()
{
const int repetitionCount = 3;
var input = new[] { 1, 2, 3, 1, 2, 3, 1, 3 };
const int expected = 2;
var actual = MissingNumber.CountFrequency(repetitionCount, input);
// Testing 'are not equal' because this algorithm only works when the numbers are sorted by value
// It should fail on an unsorted array of numbers
Assert.AreNotEqual(expected, actual);
}