Livt.Collections

tests/queue/Queue8Test.lvt

namespace Livt.Collections.Tests.Queue

using Livt.Collections

/**
 * Verifies inherited construction, capacity and the transaction API.
 */
@Test
component Queue8Test
{
	// Shared fixture instances, signals, and observation state.
	queue: Queue8

	/**
	 * Creates the fixed-capacity specialization.
	 */
	new()
	{
		this.queue = new Queue8()
	}

	/**
	 * Checks the capacity and wrap around case.
	 */
	@Test
	fn TestCapacityAndWrapAround()
	{
		this.queue.Clear()
		var value: byte = 0xFF
		assert this.queue.TryDequeue(value) == false
		assert value == 0x00

		for (var round = 0; round < 3; round++) {
			assert this.queue.GetSpace() == 8

			for (var index = 0; index < 8; index++) {
				assert this.queue.TryEnqueue(index as byte) == true
			}

			assert this.queue.GetCount() == 8
			assert this.queue.GetSpace() == 0
			assert this.queue.TryEnqueue(0xFF) == false

			for (var index = 0; index < 8; index++) {
				assert this.queue.TryDequeue(value) == true
				assert value == index as byte
			}

			assert this.queue.GetCount() == 0
		}
	}

	/**
	 * Checks that clearing the queue permits another enqueue/dequeue sequence.
	 */
	@Test
	fn TestClearAndReuse()
	{
		this.queue.Clear()
		assert this.queue.TryEnqueue(0xA5) == true
		this.queue.Clear()
		assert this.queue.GetCount() == 0
		assert this.queue.GetSpace() == 8
		var value: byte = 0xFF
		assert this.queue.TryDequeue(value) == false
		assert value == 0x00
		assert this.queue.TryEnqueue(0x00) == true
		assert this.queue.TryDequeue(value) == true
		assert value == 0x00
	}
}