[TestMethod] public void Random_UniqueNext()
{
#region count < Math.Sqrt(maxValue - minValue)
{ // test shifting from maxValue
int i = 999;
TestingRandom random = new TestingRandom(() => i--);
ISet <int> set = new SetHashLinked <int>();
random.NextUnique(5, 0, 1000, j => { Assert.IsFalse(set.Contains(j)); set.Add(j); });
Assert.IsTrue(set.Count == 5);
}
{ // test shifting from 0
TestingRandom random = new TestingRandom(() => 0);
ISet <int> set = new SetHashLinked <int>();
random.NextUnique(5, 0, 1000, i => { Assert.IsFalse(set.Contains(i)); set.Add(i); });
Assert.IsTrue(set.Count == 5);
}
{ // test shifting from inner value
TestingRandom random = new TestingRandom(() => 7);
ISet <int> set = new SetHashLinked <int>();
random.NextUnique(5, 0, 1000, i => { Assert.IsFalse(set.Contains(i)); set.Add(i); });
Assert.IsTrue(set.Count == 5);
}
{ // test
Random random = new Random();
for (int i = 0; i < 10000; i++)
{
ISet <int> set = new SetHashLinked <int>();
random.NextUnique(5, 0, 1000, j => { Assert.IsFalse(set.Contains(j)); set.Add(j); });
Assert.IsTrue(set.Count == 5);
}
}
{ // test invalid random argument exception
TestingRandom random = new TestingRandom(() => 1000);
Assert.ThrowsException <ArgumentException>(() => random.NextUnique(5, 0, 1000, i => { }));
}
{ // test invalid random argument exception
TestingRandom random = new TestingRandom(() => - 1);
Assert.ThrowsException <ArgumentException>(() => random.NextUnique(5, 0, 1000, i => { }));
}
#endregion
#region count >= Math.Sqrt(maxValue - minValue)
{ // test shifting from maxValue
int i = 999;
TestingRandom random = new TestingRandom(() => i--);
ISet <int> set = new SetHashLinked <int>();
random.NextUnique(100, 0, 1000, j => { Assert.IsFalse(set.Contains(j)); set.Add(j); });
Assert.IsTrue(set.Count == 100);
}
{ // test shifting from 0
TestingRandom random = new TestingRandom(() => 0);
ISet <int> set = new SetHashLinked <int>();
random.NextUnique(100, 0, 1000, i => { Assert.IsFalse(set.Contains(i)); set.Add(i); });
Assert.IsTrue(set.Count == 100);
}
{ // test shifting from inner value
TestingRandom random = new TestingRandom(() => 7);
ISet <int> set = new SetHashLinked <int>();
random.NextUnique(100, 0, 1000, i => { Assert.IsFalse(set.Contains(i)); set.Add(i); });
Assert.IsTrue(set.Count == 100);
}
{ // test
Random random = new Random();
for (int i = 0; i < 10000; i++)
{
ISet <int> set = new SetHashLinked <int>();
random.NextUnique(100, 0, 1000, j => { Assert.IsFalse(set.Contains(j)); set.Add(j); });
Assert.IsTrue(set.Count == 100);
}
}
{ // test invalid random argument exception
TestingRandom random = new TestingRandom(() => 1000);
Assert.ThrowsException <ArgumentException>(() => random.NextUnique(100, 0, 1000, i => { }));
}
{ // test invalid random argument exception
TestingRandom random = new TestingRandom(() => - 1);
Assert.ThrowsException <ArgumentException>(() => random.NextUnique(100, 0, 1000, i => { }));
}
#endregion
}
