what's the namespace for [datasource] for data driven test

The DataSource attribute is part of Microsoft.VisualStudio.QualityTools.UnitTestFramework.dll and this assembly can only be referenced from Coded UI Test Projects that targets the .NET Framework (see http://ift.tt/1j2zYov) but not in a Unit Test Library for Windows Store Apps.

In other words, the DataSourceAttribute class is not available for Windows Store Apps.

Please refer to the following thread for more information: http://ift.tt/1n58fEc