public void Existing_connection_can_be_opened_and_closed_externally() { var dbConnection = new FakeDbConnection( "Database=FrodoLives", state: ConnectionState.Closed); using (var connection = new FakeRelationalConnection( CreateOptions(new FakeRelationalOptionsExtension { Connection = dbConnection }))) { Assert.Equal(0, connection.DbConnections.Count); connection.Open(); Assert.Equal(0, connection.DbConnections.Count); Assert.Equal(1, dbConnection.OpenCount); connection.Close(); Assert.Equal(1, dbConnection.OpenCount); Assert.Equal(1, dbConnection.CloseCount); dbConnection.SetState(ConnectionState.Open); connection.Open(); Assert.Equal(1, dbConnection.OpenCount); Assert.Equal(1, dbConnection.CloseCount); connection.Close(); Assert.Equal(1, dbConnection.OpenCount); Assert.Equal(1, dbConnection.CloseCount); dbConnection.SetState(ConnectionState.Closed); connection.Open(); Assert.Equal(2, dbConnection.OpenCount); Assert.Equal(1, dbConnection.CloseCount); connection.Close(); Assert.Equal(2, dbConnection.OpenCount); Assert.Equal(2, dbConnection.CloseCount); } }