Using TestContext

Data-Driven Unit Testing

It is important to create a private instance of the TestContext object in your TestClass.  You'll also need to create a public property on that field, so the test harness can initialize it for you. If you create unit tests by way of Code Generation, then this object will be added for you automatically. Otherwise you will need to add it manually. That will look something like this (C#):
    private TestContext m_testContext;
    public TestContext TestContext
    {
        get { return m_testContext; }
        set { m_testContext = value; }
    }
When you are ready to write your code, refer to the data through the TestContext object like (C#):
    string firstParameter = m_testContext.DataRow[0].ToString();
    string secondParameter = m_testContext.DataRow["SecondColumn"].ToString();


Finding Files

Another great use for this object is determining where your tests and files have been deployed to. The TestContext.TestDeploymentDir property contains this information. There is also TestContext.TestLogsDir, TestContext.TestDir, and even TestContext.TestName. To see what these equate to, add a new unit test and add the following lines:
    Console.WriteLine("TestDir: {0}", m_testContext.TestDir);
    Console.WriteLine("TestDeploymentDir: {0}", m_testContext.TestDeploymentDir);
    Console.WriteLine("TestLogsDir: {0}", m_testContext.TestLogsDir);
    Console.WriteLine("TestName: {0}", m_testContext.TestName);