detectSoundlevel-spike/sourceCode/trunk/Code/CoreAudioTests/DeviceTopologyApi/IAudioPeakMeterTest.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;

namespace CoreAudioTests.DeviceTopologyApi
{
	/// <summary>
	/// Tests all methods of the IAudioPeakMeter interface.
	/// </summary>
	[TestClass]
	public class IAudioPeakMeterTest : TestClass<IAudioPeakMeter>
	{
		/// <summary>
		/// Tests that the channel count can be received, for each applicable part in the system.
		/// </summary>
		[TestMethod]
		public void IAudioPeakMeter_GetChannelCount()
		{
			ExecutePartActivationTest(activation =>
			{
				var count = UInt32.MaxValue;
				var result = activation.GetChannelCount(out count);

				AssertCoreAudio.IsHResultOk(result);
				Assert.AreNotEqual(UInt32.MaxValue, count, "The channel count was not received.");
			});
		}

		/// <summary>
		/// Tests that the level of each channel can be received, for each applicable part in the system.
		/// </summary>
		[TestMethod]
		public void IAudioPeakMeter_GetLevel()
		{
			var tested = false;

			ExecutePartActivationTest(activation =>
			{
				var count = UInt32.MaxValue;
				activation.GetChannelCount(out count);

				for (uint i = 0; i < count; i++)
				{
					var level = 123.456f;
					var result = activation.GetLevel(i, out level);

					AssertCoreAudio.IsHResultOk(result);
					Assert.AreNotEqual(123.456f, level, "The level was not received.");
					tested = true;
				}
			});

			if (!tested) Assert.Inconclusive("No channels were available to test against.");
		}
	}
}