public void TestCountElementsInArray()
{
const int arraySize = 100;
RandomArrayGenerator randomArrayGenerator = new RandomArrayGenerator();
int[] resultArray = randomArrayGenerator.Generate(arraySize);
Assert.AreEqual(resultArray.Length, arraySize);
}
public void TestCheckElementsBounds()
{
RandomArrayGenerator randomArrayGenerator = new RandomArrayGenerator();
int[] resultArray = randomArrayGenerator.Generate(100000);
foreach (var element in resultArray)
{
Assert.IsTrue((element >= randomArrayGenerator.StartValue) && (element < randomArrayGenerator.EndValue));
}
}
public void TestUniformDistribution()
{
RandomArrayGenerator randomArrayGenerator = new RandomArrayGenerator();
randomArrayGenerator.StartValue = -100;
randomArrayGenerator.EndValue = 100;
int generateCount = randomArrayGenerator.EndValue - randomArrayGenerator.StartValue;
int[] resultArray = randomArrayGenerator.Generate(generateCount * 100000);
int[] counts = new int[generateCount];
foreach (var element in resultArray)
{
counts[element - randomArrayGenerator.StartValue]++;
}
double averageCount = (double)resultArray.Length / generateCount;
foreach (var count in counts)
{
double despersion = Math.Sqrt(Math.Pow(count - averageCount, 2) / resultArray.Length);
Assert.IsTrue(despersion < 0.3);
}
}