detectSoundlevel-spike/sourceCode/trunk/Code/CoreAudioTests/Wasapi/IChannelAudioVolumeTest.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 System.Linq;
using CoreAudioTests.Common;
using Microsoft.VisualStudio.TestTools.UnitTesting;
using Vannatech.CoreAudio.Constants;
using Vannatech.CoreAudio.Interfaces;

namespace CoreAudioTests.Wasapi
{
	/// <summary>
	/// Tests all methods of the IChannelAudioVolume interface.
	/// </summary>
	[TestClass]
	public class IChannelAudioVolumeTest : TestClass<IChannelAudioVolume>
	{
		/// <summary>
		/// Tests that all channel volumes may be received, for each available service.
		/// </summary>
		[TestMethod]
		public void IChannelAudioVolume_GetAllVolumes()
		{
			ExecuteServiceTest(service =>
			{
				UInt32 channelCount;
				service.GetChannelCount(out channelCount);

				var volumes = Enumerable.Repeat(123.456f, (int)channelCount).ToArray();
                var result = service.GetAllVolumes(channelCount, volumes);

				AssertCoreAudio.IsHResultOk(result);
				Assert.IsFalse(volumes.Any(val => val == 123.456f), "One or more volumes were not received.");
			});
		}

		/// <summary>
		/// Tests that the channel count may be received, for each available service.
		/// </summary>
		[TestMethod]
		public void IChannelAudioVolume_GetChannelCount()
		{
			ExecuteServiceTest(service =>
			{
				var channelCount = UInt32.MaxValue;
				var result = service.GetChannelCount(out channelCount);

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

		/// <summary>
		/// Tests that individual channel volumes may be received, for each available service.
		/// </summary>
		[TestMethod]
		public void IChannelAudioVolume_GetChannelVolume()
		{
			ExecuteServiceTest(service =>
			{
				UInt32 channelCount;
				service.GetChannelCount(out channelCount);

				for (uint i = 0; i < channelCount; i++)
				{
					var volume = 123.456f;
					var result = service.GetChannelVolume(i, out volume);

					AssertCoreAudio.IsHResultOk(result);
					Assert.AreNotEqual(123.456f, volume, "The channel volume was not received.");
				}
			});
		}

		/// <summary>
		/// Tests that all volumes may be set, for each available service.
		/// </summary>
		[TestMethod]
		public void IChannelAudioVolume_SetAllVolumes()
		{
			ExecuteServiceTest(service =>
			{
                UInt32 channelCount;
                service.GetChannelCount(out channelCount);

                float[] valOrig = new float[channelCount];
                service.GetAllVolumes(channelCount, valOrig);

                // Set to test values.
                var context = Guid.NewGuid();
                var result = service.SetAllVolumes(channelCount, Enumerable.Repeat(0.5f, (int)channelCount).ToArray(), context);
                AssertCoreAudio.IsHResultOk(result);

                // Check new values.
                float[] valNew = new float[channelCount];
                service.GetAllVolumes(channelCount, valNew);
                Assert.IsFalse(valNew.Any(val => val != 0.5f), "One or more volumes were not set.");

                // Return to original value.
                result = service.SetAllVolumes(channelCount, valOrig, context);
                AssertCoreAudio.IsHResultOk(result);
			});
		}

		/// <summary>
		/// Tests that individual channel volumes may be set, for each available service.
		/// </summary>
		[TestMethod]
		public void IChannelAudioVolume_SetChannelVolume()
		{
			ExecuteServiceTest(service =>
			{
				UInt32 channelCount;
				service.GetChannelCount(out channelCount);

				for (uint i = 0; i < channelCount; i++)
				{
					float valOrig;
					service.GetChannelVolume(i, out valOrig);

					// Set to test value.
					var context = Guid.NewGuid();
					var result = service.SetChannelVolume(i, 0.5f, context);
					AssertCoreAudio.IsHResultOk(result);

					// Check new value.
					float valNew;
					service.GetChannelVolume(i, out valNew);
					Assert.AreEqual(0.5f, valNew, "The channel volume was not set.");

					// Return to original value.
					result = service.SetChannelVolume(i, valOrig, context);
					AssertCoreAudio.IsHResultOk(result);
				}
			});
		}
	}
}