// The following code was generated by Microsoft Visual Studio 2005.
// The test owner should check each test for validity.
using Microsoft.VisualStudio.TestTools.UnitTesting;
using System;
using System.Text;
using System.Collections.Generic;
using Virtuoso.Miranda.Plugins.Native;
using System.Diagnostics;
namespace Virtuoso.Miranda.Plugins.UnitTests
{
    /// <summary>
    ///This is a test class for Virtuoso.Miranda.Plugins.Native.InteropBufferPool and is intended
    ///to contain all Virtuoso.Miranda.Plugins.Native.InteropBufferPool Unit Tests
    ///</summary>
    [TestClass()]
    public class InteropBufferPoolTest
    {
        private TestContext testContextInstance;

        /// <summary>
        ///Gets or sets the test context which provides
        ///information about and functionality for the current test run.
        ///</summary>
        public TestContext TestContext
        {
            get
            {
                return testContextInstance;
            }
            set
            {
                testContextInstance = value;
            }
        }
        #region Additional test attributes
        // 
        //You can use the following additional attributes as you write your tests:
        //
        //Use ClassInitialize to run code before running the first test in the class
        //
        //[ClassInitialize()]
        //public static void MyClassInitialize(TestContext testContext)
        //{
        //}
        //
        //Use ClassCleanup to run code after all tests in a class have run
        //
        //[ClassCleanup()]
        //public static void MyClassCleanup()
        //{
        //}
        //
        //Use TestInitialize to run code before running each test
        //
        //[TestInitialize()]
        //public void MyTestInitialize()
        //{
        //}
        //
        //Use TestCleanup to run code after each test has run
        //
        //[TestCleanup()]
        //public void MyTestCleanup()
        //{
        //}
        //
        #endregion

        [TestInitialize]
        public void TestInitializer()
        {
            InteropBufferPool_Accessor.Refresh();
        }
        
        /// <summary>
        ///A test for AcquireBuffer (int)
        ///</summary>
        [TestMethod()]
        public void AcquireBufferTest()
        {
            InteropBuffer buffer = null, buffer1 = null;

            try
            {
                int prev = InteropBufferPool_Accessor.NextAvailableBufferIndex;
                buffer = InteropBufferPool.AcquireBuffer();

                Assert.AreEqual<int>(prev + 1, InteropBufferPool_Accessor.NextAvailableBufferIndex);

                buffer1 = InteropBufferPool.AcquireBuffer(InteropBufferPool_Accessor.maximumAvailableBufferSize + 1);
                Assert.IsTrue(Array.IndexOf<InteropBuffer>(InteropBufferPool_Accessor.Buffers, buffer1) == -1, "Acquired buffer is probably undersized.");

                try
                {
                    InteropBufferPool.AcquireBuffer(0);
                    Assert.Fail("Negative buffer size accepted.");
                }
                catch { }
            }
            finally
            {
                InteropBufferPool.ReleaseBuffer(buffer);
                InteropBufferPool.ReleaseBuffer(buffer1);
            }
        }

        [TestMethod()]
        public void AcquireReleaseExpandedBufferTest()
        {
            InteropBuffer buffer = null, buffer1 = null, buffer2 = null;
            int expandedSize = InteropBufferPool_Accessor.maximumAvailableBufferSize + 1;

            try
            {
                buffer = buffer1 = InteropBufferPool.AcquireBuffer(expandedSize);
                Assert.IsTrue(Array.IndexOf<InteropBuffer>(InteropBufferPool_Accessor.Buffers, buffer) == -1, "Acquired buffer is probably undersized.");

                InteropBufferPool.ReleaseBuffer(buffer);
                Assert.IsTrue(Array.IndexOf<InteropBuffer>(InteropBufferPool_Accessor.Buffers, buffer1) != -1, "Expanded buffer not assimilated.");

                buffer = InteropBufferPool.AcquireBuffer(expandedSize);
                Assert.IsTrue(buffer == buffer1, "Assimilated expanded buffer not used.");
                Assert.IsTrue(buffer.Size >= expandedSize, "Undersized buffer acquired.");
                InteropBufferPool.ReleaseBuffer(buffer);

                buffer = InteropBufferPool.AcquireBuffer(expandedSize);
                buffer1 = InteropBufferPool.AcquireBuffer(expandedSize);
                Assert.IsTrue(buffer != buffer1, "Reserved buffer acquired.");

                buffer2 = InteropBufferPool.AcquireBuffer(expandedSize);
                Assert.IsTrue(buffer2 != buffer && buffer2 != buffer1, "Reserved buffer acquired.");
            }
            finally
            {
                InteropBufferPool.ReleaseBuffer(buffer);
                InteropBufferPool.ReleaseBuffer(buffer1);
                InteropBufferPool.ReleaseBuffer(buffer2);
            }
        }

        /// <summary>
        ///A test for ReleaseBuffer (InteropBuffer)
        ///</summary>
        [TestMethod()]
        public void ReleaseBufferTest()
        {
            int prev = InteropBufferPool_Accessor.NextAvailableBufferIndex;
            InteropBuffer buffer = InteropBufferPool.AcquireBuffer();
            InteropBuffer buffer1 = buffer;

            try
            {
                buffer.Lock();
                InteropBufferPool.ReleaseBuffer(buffer);
                Assert.Fail("InteropBufferPool::ReleaseBuffer accepts locked buffers.");
            }
            catch { }
            finally
            {
                buffer.Unlock();
                InteropBufferPool.ReleaseBuffer(buffer);
            }

            try
            {
                InteropBufferPool.ReleaseBuffer(buffer1);
                Assert.Fail("InteropBufferPool::ReleaseBuffer accepts already released buffers.");
            }
            catch { }

            Assert.AreEqual<int>(prev, InteropBufferPool_Accessor.NextAvailableBufferIndex);

            try
            {
                IntPtr ptr = buffer.IntPtr;
                Assert.Fail("InteropBufferPool::ReleaseBuffer does not dispose released buffers.");
            }
            catch { }
        }        
    }
}