detectSoundlevel-spike/sourceCode/trunk/Code/CoreAudioTests/Wasapi/IAudioSessionEnumeratorTest.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.Wasapi
{
	/// <summary>
	/// Tests all methods of the IAudioSessionEnumerator interface.
	/// </summary>
	/// <remarks>
	/// This test class uses the context of IAudioSessionManager2 because
	/// that interface must be used to retrieve the IAudioSessionEnumerator instance.
	/// </remarks>
	[TestClass]
	public class IAudioSessionEnumeratorTest : TestClass<IAudioSessionManager2>
	{
		/// <summary>
		/// Tests that the count may be received, for each available session enumerator.
		/// </summary>
		[TestMethod]
		public void IAudioSessionEnumerator_GetCount()
		{
			var tested = false;

			ExecuteDeviceActivationTest(activation =>
			{
				IAudioSessionEnumerator sessionList;
				var result = activation.GetSessionEnumerator(out sessionList);
				if (result != 0) return;
				Manager.EnsureDisposal(sessionList);

				var count = Int32.MinValue;
				result = sessionList.GetCount(out count);

				AssertCoreAudio.IsHResultOk(result);
				Assert.AreNotEqual(Int32.MinValue, count, "The count was not received.");
				tested = true;
			});

			if (!tested) Assert.Inconclusive("No valid session enumerator interfaces could be created.");
		}

		/// <summary>
		/// Tests that each specific session may be received, for each available session enumerator.
		/// </summary>
		[TestMethod]
		public void IAudioSessionEnumerator_GetSession()
		{
			var tested = false;

			ExecuteDeviceActivationTest(activation =>
			{
				IAudioSessionEnumerator sessionList;
				var result = activation.GetSessionEnumerator(out sessionList);
				if (result != 0) return;
				Manager.EnsureDisposal(sessionList);

				Int32 count;
				sessionList.GetCount(out count);

				for (int i = 0; i < count; i++)
				{
					IAudioSessionControl session;
					result = sessionList.GetSession(i, out session);

					AssertCoreAudio.IsHResultOk(result);
					Manager.EnsureDisposal(session);
					tested = true;
				}
			});

			if (!tested) Assert.Inconclusive("No valid session enumerator interfaces could be created.");
		}
	}
}