TestContext.DataRow Property

When overridden in a derived class, gets the current data row when test is used for data driven testing.

Namespace:  Microsoft.VisualStudio.TestTools.UnitTesting
Assembly:  Microsoft.VisualStudio.QualityTools.UnitTestFramework (in Microsoft.VisualStudio.QualityTools.UnitTestFramework.dll)

Syntax

'Declaration
Public MustOverride ReadOnly Property DataRow As DataRow

public abstract DataRow DataRow { get; }

public:
virtual property DataRow^ DataRow {
    DataRow^ get () abstract;
}

abstract DataRow : DataRow with get

abstract function get DataRow () : DataRow

Property Value

Type: DataRow
A DataRow object.

Remarks

The DataRow property returns values for the current row by column. This will return data identified by column. The column is identified either by name, as in the following example, or by its index location. Using the sample data table shown in following example section, an index identifier of DataRow[0] will return the value for the Name column in Table1.

Examples

The following code contains the class and method to test.

using System;

namespace BankAccountNS
{
   public class BankAccount
   {
      private string m_customerName;
      private double m_balance;

      public BankAccount(string customerName, double balance)
      {
         m_customerName = customerName;
         m_balance = balance;
      }

      public double Balance
      { get { return m_balance; } }

      public void Debit(double amount)
      {
         if (amount < 0)
            throw new ArgumentOutOfRangeException("amount");
         m_balance -= amount;
      }
   }
}

Imports System

Namespace BankAccountNS
   Public Class BankAccount
      Private m_customerName As String
      Private m_balance As Double

      Public Sub New(ByVal customerName As String, ByVal balance As Double)
         m_customerName = customerName
         m_balance = balance
      End Sub

      Public ReadOnly Property Balance() As Double
         Get
            Return m_balance
         End Get
      End Property

        Public Sub Debit(ByVal amount As Double)
            If amount < 0 Then
                Throw New ArgumentOutOfRangeException("amount")
            End If
            m_balance -= amount
        End Sub
    End Class
End Namespace

The following test will pass. It uses the sample.mdb access database that contains Table1 with the following data.

Name	Balance	Amount
Becky	100	25
John	70	60
Larry	75	71.25
Stephanie	159	158
Mr. Bryan Walton	11.99	11.22

using Microsoft.VisualStudio.TestTools.UnitTesting;
using BankAccountNS;
using System;

namespace TestProject1
{
   [TestClass()]
   public class BankAccountTest
   {
      private TestContext testContextInstance;
      public TestContext TestContext
      {
         get { return testContextInstance; }
         set { testContextInstance = value; }
      }

      [TestMethod()]
      [DataSource("System.Data.OleDb",
         "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=\"D:\\sample.mdb\"",
         "Table1",
         DataAccessMethod.Sequential)]
      public void DebitTest()
      {
         string customerName = testContextInstance.DataRow["Name"].ToString();

         double balance = Convert.ToDouble(testContextInstance.DataRow["Balance"]);
         double amount = Convert.ToDouble(testContextInstance.DataRow["Amount"]); 

         double newBalance = balance - amount;

         BankAccount target = new BankAccount(customerName, balance);
         target.Debit(amount);

         Assert.AreEqual(newBalance, target.Balance, .00);
      }
   }
}

Imports Microsoft.VisualStudio.TestTools.UnitTesting
Imports BankAccountNS
Imports System

Namespace TestProject1
   <TestClass()> _
   Public Class BankAccountTest
      Private testContextInstance As TestContext
      Public Property TestContext() As TestContext
         Get
            Return testContextInstance
         End Get
         Set(ByVal Value As TestContext)
            testContextInstance = Value
         End Set
      End Property

      <TestMethod()> _
      <DataSource("System.Data.OleDb", _
      "Provider=Microsoft.Jet.OLEDB.4.0;Data Source=""D:\ sample.mdb""", _
      "Table1", DataAccessMethod.Sequential)> _
      Public Sub DebitTest()
         Dim customerName As String = testContextInstance.DataRow("Name").ToString()

         Dim balance As Double = Convert.ToDouble(testContextInstance.DataRow("Balance"))
         Dim amount As Double = Convert.ToDouble(testContextInstance.DataRow("Amount"))

         Dim NewBalance As Double = balance - amount

         Dim target As BankAccount = New BankAccount(customerName, balance)
         target.Debit(amount)

         Assert.AreEqual(NewBalance, target.Balance, 0.0)
      End Sub
   End Class
End Namespace

.NET Framework Security

• Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.

See Also

Reference

TestContext Class

Microsoft.VisualStudio.TestTools.UnitTesting Namespace

Other Resources

How To: Create a Data-Driven Unit Test

How to: Configure a Data-Driven Unit Test

Using the TestContext Class