public void IsEmpty()
{
var rnd = new Random();
var buffer = new CircularBuffer<int>(1);
Assert.IsTrue(buffer.IsEmpty, "Step 1");
buffer.AddToHead(rnd.Next());
Assert.IsFalse(buffer.IsEmpty, "Step 2");
buffer.AddToHead(rnd.Next());
Assert.IsFalse(buffer.IsEmpty, "Step 3");
buffer.RemoveFromHead();
Assert.IsTrue(buffer.IsEmpty, "Step 4");
}
public void LengthTest()
{
var rnd = new Random();
var buffer = new CircularBuffer<int>(1);
Assert.That(buffer.Length, Is.EqualTo(0), "0. Expected 0 length");
buffer.AddToHead(rnd.Next());
Assert.That(buffer.Length, Is.EqualTo(1), "1. Expected 1 length");
buffer.AddToHead(rnd.Next());
Assert.That(buffer.Length, Is.EqualTo(1), "2. Expected 1 length");
buffer.RemoveFromHead();
Assert.That(buffer.Length, Is.EqualTo(0), "3. Expected 0 length");
}
public void SingleElementBuffer()
{
var rnd = new Random();
var buffer = new CircularBuffer<int>(1);
int value1 = rnd.Next();
buffer.AddToHead(value1);
Assert.That(buffer.Head, Is.EqualTo(buffer.Tail), "1. Single element buffer expect Tail equal Head");
Assert.That(buffer.Head, Is.EqualTo(value1), "1. Head shoud be equal the last added value");
value1 = rnd.Next();
buffer.AddToHead(value1);
Assert.That(buffer.Head, Is.EqualTo(buffer.Tail), "2. Single element buffer expect Tail equal Head");
Assert.That(buffer.Head, Is.EqualTo(value1), "2. Head shoud be equal the last added value");
Assert.That(buffer.RemoveFromHead(), Is.EqualTo(value1), "2. Remove from head should return the last added value");
}
public void RemoveFromHeadTest()
{
var rnd = new Random();
var buffer = new CircularBuffer<int>(2);
var head = rnd.Next();
var tail = rnd.Next();
buffer.AddToHead(head);
buffer.AddToTail(tail);
Assert.That(buffer.Head, Is.EqualTo(head), "Invalid head value");
Assert.That(buffer.Tail, Is.EqualTo(tail), "Invalid tail value");
Assert.That(buffer.Length, Is.EqualTo(2), "Invalid Length value");
Assert.That(buffer.RemoveFromHead(), Is.EqualTo(head), "Step 1");
Assert.That(buffer.RemoveFromHead(), Is.EqualTo(tail), "Step 2");
Assert.That(buffer.IsEmpty, Is.True, "Buffer should be empty");
Assert.Throws(typeof(InvalidOperationException), () => buffer.RemoveFromHead());
}