public void GetUniqueInts_RangeLowerThanLength_Exception()
{
var target = new FastRandomRandomization();
ExceptionAssert.IsThrowing(new ArgumentOutOfRangeException("length", "The length is 5, but the possible unique values between 0 (inclusive) and 4 (exclusive) are 4."), () =>
{
target.GetUniqueInts(5, 0, 4);
});
}
public void GetUniqueInts_Length_ArrayWithUniqueInts()
{
var target = new FastRandomRandomization ();
var actual = target.GetUniqueInts (10, 0, 10);
Assert.AreEqual (10, actual.Length);
Assert.AreEqual (10, actual.Distinct().Count());
for (int i = 0; i < 10; i++)
{
Assert.IsTrue(actual[i] >= 0 && actual[i] < 10);
}
actual = target.GetUniqueInts(10, 10, 20);
Assert.AreEqual(10, actual.Length);
Assert.AreEqual(10, actual.Distinct().Count());
for (int i = 0; i < 10; i++)
{
Assert.IsTrue(actual[i] >= 10 && actual[i] < 20);
}
actual = target.GetUniqueInts(2, 0, 20);
Assert.AreEqual(2, actual.Length);
Assert.AreEqual(2, actual.Distinct().Count());
for (int i = 0; i < 2; i++)
{
Assert.IsTrue(actual[i] >= 0 && actual[i] < 20);
}
FlowAssert.IsAtLeastOneAttemptOk (100, () => {
actual = target.GetUniqueInts (2, 0, 20);
Assert.AreEqual (2, actual.Length);
Assert.AreEqual (2, actual.Distinct ().Count ());
Assert.IsTrue(actual[0] >= 2);
});
}