internal static void AllNValuesCanChangePositions(this Assert _, IShuffle <ValuePriorityPair <int> > shuffle)
{
var elements = new ValuePriorityPairs <int>
{
new ValuePriorityPair <int>(1, 1),
new ValuePriorityPair <int>(2, 2),
new ValuePriorityPair <int>(3, 3),
new ValuePriorityPair <int>(4, 4),
new ValuePriorityPair <int>(5, 5),
};
var value1Set = new HashSet <int>();
var value2Set = new HashSet <int>();
var value3Set = new HashSet <int>();
for (var i = 0; i < _iterations; i++)
{
var shuffled = shuffle.Shuffle(elements, 3).ToList();
value1Set.Add(shuffled[0].Value);
value2Set.Add(shuffled[1].Value);
value3Set.Add(shuffled[2].Value);
}
Assert.AreEqual(elements.Count(), value1Set.Count);
Assert.AreEqual(elements.Count(), value2Set.Count);
Assert.AreEqual(elements.Count(), value3Set.Count);
}
/// <summary>
/// Initializes a new instance of the <see cref="DefaultPicker{T}"/> class.
/// </summary>
/// <param name="rng">The random number generator.</param>
/// <param name="pairs">The value-priority paris to pick from.</param>
/// <param name="numberOfElements">The number of elements to pick.</param>
public DefaultPicker(IRandomNumberGenerator rng, ValuePriorityPairs <T> pairs, int numberOfElements)
{
_rng = rng;
_numberOfElements = numberOfElements;
_pairs = pairs;
}
/// <summary>
/// Initializes a new instance of the <see cref="DefaultPicker{T}"/> class.
/// </summary>
/// <param name="rng">The random number generator.</param>
/// <param name="pairs">The value-priority paris to pick from.</param>
public DefaultPicker(IRandomNumberGenerator rng, ValuePriorityPairs <T> pairs)
: this(rng, pairs, 1)
{
}
