public void CopyTo()
{
int[] array = new int[5];
var deque = new Deque<int>(new[] { 2, 3, 4 });
deque.CopyTo(array, 2);
Assert.AreEqual(0, array[0]);
Assert.AreEqual(0, array[1]);
Assert.AreEqual(2, array[2]);
Assert.AreEqual(3, array[3]);
Assert.AreEqual(4, array[4]);
array = new int[5];
deque = new Deque<int>();
deque.EnqueueHead(3);
deque.EnqueueHead(2);
deque.EnqueueTail(4);
deque.CopyTo(array, 2);
Assert.AreEqual(0, array[0]);
Assert.AreEqual(0, array[1]);
Assert.AreEqual(2, array[2]);
Assert.AreEqual(3, array[3]);
Assert.AreEqual(4, array[4]);
Assert.That(() => deque.CopyTo(null, 0), Throws.TypeOf<ArgumentNullException>());
Assert.That(() => deque.CopyTo(new int[5], -1), Throws.TypeOf<ArgumentOutOfRangeException>());
Assert.That(() => deque.CopyTo(new int[2], 0), Throws.TypeOf<ArgumentException>());
Assert.That(() => deque.CopyTo(new int[5], 5), Throws.TypeOf<ArgumentException>());
Assert.That(() => deque.CopyTo(new int[5], 4), Throws.TypeOf<ArgumentException>());
}
public void CopyToShouldNotThrowIfEmpty()
{
int[] array = new int[0];
var deque = new Deque<int>();
deque.CopyTo(array, 0);
}
private static void TestCopyTo(Deque deque)
{
deque.Clear();
PopulateDequePushBack(deque);
int[] array = new int[deque.Count];
deque.CopyTo(array, 0);
foreach(int i in deque)
{
Debug.Assert(array[i] == i);
}
array = new int[deque.Count * 2];
deque.CopyTo(array, deque.Count);
foreach(int i in deque)
{
Debug.Assert(array[i + deque.Count] == i);
}
array = new int[deque.Count];
try
{
deque.CopyTo(null, deque.Count);
Debug.Fail("Exception failed");
}
catch(Exception ex)
{
Console.WriteLine(ex.Message);
}
try
{
deque.CopyTo(array, -1);
Debug.Fail("Exception failed");
}
catch(Exception ex)
{
Console.WriteLine(ex.Message);
}
try
{
deque.CopyTo(array, deque.Count / 2);
Debug.Fail("Exception failed");
}
catch(Exception ex)
{
Console.WriteLine(ex.Message);
}
try
{
deque.CopyTo(array, deque.Count);
Debug.Fail("Exception failed");
}
catch(Exception ex)
{
Console.WriteLine(ex.Message);
}
try
{
deque.CopyTo(new int[10, 10], deque.Count);
Debug.Fail("Exception failed");
}
catch(Exception ex)
{
Console.WriteLine(ex.Message);
}
}