/// <summary>
/// Tests that using the same connection string results in the same pool\internal connection and a different string results in a different pool\internal connection
/// </summary>
/// <param name="connectionString"></param>
private static void BasicConnectionPoolingTest(string connectionString)
{
SqlConnection connection = new SqlConnection(connectionString);
connection.Open();
InternalConnectionWrapper internalConnection = new InternalConnectionWrapper(connection);
ConnectionPoolWrapper connectionPool = new ConnectionPoolWrapper(connection);
connection.Close();
SqlConnection connection2 = new SqlConnection(connectionString);
connection2.Open();
Assert.True(internalConnection.IsInternalConnectionOf(connection2), "New connection does not use same internal connection");
Assert.True(connectionPool.ContainsConnection(connection2), "New connection is in a different pool");
connection2.Close();
SqlConnection connection3 = new SqlConnection(connectionString + ";App=SqlConnectionPoolUnitTest;");
connection3.Open();
Assert.False(internalConnection.IsInternalConnectionOf(connection3), "Connection with different connection string uses same internal connection");
Assert.False(connectionPool.ContainsConnection(connection3), "Connection with different connection string uses same connection pool");
connection3.Close();
connectionPool.Cleanup();
SqlConnection connection4 = new SqlConnection(connectionString);
connection4.Open();
Assert.True(internalConnection.IsInternalConnectionOf(connection4), "New connection does not use same internal connection");
Assert.True(connectionPool.ContainsConnection(connection4), "New connection is in a different pool");
connection4.Close();
}
/// <summary>
/// Tests that using the same connection string results in the same pool\internal connection and a different string results in a different pool\internal connection
/// </summary>
/// <param name="connectionString"></param>
private static void BasicConnectionPoolingTest(string connectionString)
{
SqlConnection connection = new SqlConnection(connectionString);
connection.Open();
InternalConnectionWrapper internalConnection = new InternalConnectionWrapper(connection);
ConnectionPoolWrapper connectionPool = new ConnectionPoolWrapper(connection);
connection.Close();
SqlConnection connection2 = new SqlConnection(connectionString);
connection2.Open();
Assert.True(internalConnection.IsInternalConnectionOf(connection2), "New connection does not use same internal connection");
Assert.True(connectionPool.ContainsConnection(connection2), "New connection is in a different pool");
connection2.Close();
SqlConnection connection3 = new SqlConnection(connectionString + ";App=SqlConnectionPoolUnitTest;");
connection3.Open();
Assert.False(internalConnection.IsInternalConnectionOf(connection3), "Connection with different connection string uses same internal connection");
Assert.False(connectionPool.ContainsConnection(connection3), "Connection with different connection string uses same connection pool");
connection3.Close();
connectionPool.Cleanup();
SqlConnection connection4 = new SqlConnection(connectionString);
connection4.Open();
Assert.True(internalConnection.IsInternalConnectionOf(connection4), "New connection does not use same internal connection");
Assert.True(connectionPool.ContainsConnection(connection4), "New connection is in a different pool");
connection4.Close();
}
/// <summary>
/// Checks if an 'emancipated' internal connection is reclaimed when a new connection is opened AND we hit max pool size
/// NOTE: 'emancipated' means that the internal connection's SqlConnection has fallen out of scope and has no references, but was not explicitly disposed\closed
/// </summary>
/// <param name="connectionString"></param>
private static void ReclaimEmancipatedOnOpenTest(string connectionString)
{
string newConnectionString = (new SqlConnectionStringBuilder(connectionString)
{
MaxPoolSize = 1
}).ConnectionString;
SqlConnection.ClearAllPools();
InternalConnectionWrapper internalConnection = CreateEmancipatedConnection(newConnectionString);
ConnectionPoolWrapper connectionPool = internalConnection.ConnectionPool;
GC.Collect();
GC.WaitForPendingFinalizers();
DataTestUtility.AssertEqualsWithDescription(1, connectionPool.ConnectionCount, "Wrong number of connections in the pool.");
DataTestUtility.AssertEqualsWithDescription(0, connectionPool.FreeConnectionCount, "Wrong number of free connections in the pool.");
using (SqlConnection connection = new SqlConnection(newConnectionString))
{
connection.Open();
Assert.True(internalConnection.IsInternalConnectionOf(connection), "Connection has wrong internal connection");
Assert.True(connectionPool.ContainsConnection(connection), "Connection is in wrong connection pool");
}
}
/// <summary>
/// Checks if an 'emancipated' internal connection is reclaimed when a new connection is opened AND we hit max pool size
/// NOTE: 'emancipated' means that the internal connection's SqlConnection has fallen out of scope and has no references, but was not explicitly disposed\closed
/// </summary>
/// <param name="connectionString"></param>
private static void ReclaimEmancipatedOnOpenTest(string connectionString)
{
string newConnectionString = connectionString + ";Max Pool Size=1";
SqlConnection.ClearAllPools();
InternalConnectionWrapper internalConnection = CreateEmancipatedConnection(newConnectionString);
ConnectionPoolWrapper connectionPool = internalConnection.ConnectionPool;
GC.Collect();
GC.WaitForPendingFinalizers();
Assert.True(1 == connectionPool.ConnectionCount, "Wrong number of connections in the pool");
Assert.True(0 == connectionPool.FreeConnectionCount, "Wrong number of free connections in the pool");
using (SqlConnection connection = new SqlConnection(newConnectionString))
{
connection.Open();
Assert.True(internalConnection.IsInternalConnectionOf(connection), "Connection has wrong internal connection");
Assert.True(connectionPool.ContainsConnection(connection), "Connection is in wrong connection pool");
}
}