public void ChooseRandomWeighted_ReturnsRandomObjectBasedOnWeight()
{
var listOfObjects = new List <WeightedTestObject>
{
new WeightedTestObject {
Name = TestConst.Heavy, Weight = TestConst.WeightHeavy
},
new WeightedTestObject {
Name = TestConst.Medium, Weight = TestConst.WeightMedium
},
new WeightedTestObject {
Name = TestConst.Light, Weight = TestConst.WeightLight
},
new WeightedTestObject {
Name = TestConst.Empty, Weight = TestConst.WeightNone
},
};
int testRuns = 100;
var stats = new Dictionary <string, int>();
var rand = new RandomWrapper();
for (int i = 0; i < testRuns; i++)
{
var selection = rand.ChooseRandomWeighted(listOfObjects);
Assert.IsNotNull(selection);
Debug.Print("Random select: {0}", selection.Name);
if (stats.ContainsKey(selection.Name))
{
stats[selection.Name] += 1;
}
else
{
stats.Add(selection.Name, 1);
}
}
foreach (var item in stats)
{
Debug.Print("{0}: {1}", item.Key, item.Value);
}
Assert.IsTrue(stats.ContainsKey(TestConst.Heavy));
Assert.IsTrue(stats.ContainsKey(TestConst.Medium));
Assert.IsTrue(stats.ContainsKey(TestConst.Light));
Assert.IsTrue(stats.ContainsKey(TestConst.Empty) == false);
Assert.IsTrue(stats[TestConst.Heavy] > stats[TestConst.Medium]);
Assert.IsTrue(stats[TestConst.Medium] > stats[TestConst.Light]);
}