detectSoundlevel-spike/sourceCode/trunk/Code/CoreAudioTests/DeviceTopologyApi/IControlInterfaceTest.cs

// -----------------------------------------
// SoundScribe (TM) and related software.
// 
// Copyright (C) 2007-2011 Vannatech
// http://www.vannatech.com
// All rights reserved.
// 
// This source code is subject to the MIT License.
// http://www.opensource.org/licenses/mit-license.php
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
// -----------------------------------------

using System;
using CoreAudioTests.Common;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using Vannatech.CoreAudio.Interfaces;
using Vannatech.CoreAudio.Constants;
using System.Runtime.InteropServices;

namespace CoreAudioTests.DeviceTopologyApi
{
	/// <summary>
	/// Tests all methods of the IControlInterface interface.
	/// </summary>
	[TestClass]
	public class IControlInterfaceTest
	{
		/// <summary>
		/// Tests that the ID can be received, for each available control interface in the system.
		/// </summary>
		[TestMethod]
		public void IControlInterface_GetIID()
		{
			int result = 0;
			var allParts = TestUtilities.CreateIPartCollection();

			try
			{
				foreach (var part in allParts)
				{
					UInt32 count;
					part.GetControlInterfaceCount(out count);

					for (uint i = 0; i < count; i++)
					{
						IControlInterface ctrl;
						part.GetControlInterface(i, out ctrl);

						Guid iid = Guid.Empty;
						result = ctrl.GetIID(out iid);

						Marshal.FinalReleaseComObject(ctrl);

						AssertCoreAudio.IsHResultOk(result);
						Assert.AreNotEqual(Guid.Empty, iid, "The control IID was not received.");
					}
				}
			}
			finally
			{
				foreach (var part in allParts)
					Marshal.FinalReleaseComObject(part);
			}
		}

		/// <summary>
		/// Tests that the name can be received, for each available control interface in the system.
		/// </summary>
		[TestMethod]
		public void IControlInterface_GetName()
		{
			int result = 0;
			var allParts = TestUtilities.CreateIPartCollection();

			try
			{
				foreach (var part in allParts)
				{
					UInt32 count;
					part.GetControlInterfaceCount(out count);

					for (uint i = 0; i < count; i++)
					{
						IControlInterface ctrl;
						part.GetControlInterface(i, out ctrl);

						string name = "abc123";
						result = ctrl.GetName(out name);

						Marshal.FinalReleaseComObject(ctrl);

						AssertCoreAudio.IsHResultOk(result);
						Assert.AreNotEqual("abc123", name, "The control name was not received.");
					}
				}
			}
			finally
			{
				foreach (var part in allParts)
					Marshal.FinalReleaseComObject(part);
			}
		}
	}
}