TestContext.DataRow 属性

当在派生类中重写时，如果测试用于数据驱动测试，则获取当前数据行。

命名空间：  Microsoft.VisualStudio.TestTools.UnitTesting
程序集：  Microsoft.VisualStudio.QualityTools.UnitTestFramework（在 Microsoft.VisualStudio.QualityTools.UnitTestFramework.dll 中）

语法

声明
Public MustOverride ReadOnly Property DataRow As DataRow
    Get

public abstract DataRow DataRow { get; }

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

abstract DataRow : DataRow

abstract function get DataRow () : DataRow

属性值

类型：System.Data.DataRow
一个 DataRow 对象。

备注

DataRow 属性按列返回当前行的值。 这将返回按列标识的数据。 列是按名称（如以下示例所示）或按索引位置标识的。 对于下面的示例节中所显示的示例数据表，索引标识符 DataRow[0] 将返回 Table1 中“Name”列的值。

示例

下面的代码包含要测试的类和方法。

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

下面的测试将会通过。 它使用包含 Table1 的 sample.mdb Access 数据库，其中 Table1 包含以下数据。

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 安全性

• 对直接调用方的完全信任。此成员不能由部分信任的代码使用。有关更多信息，请参见通过部分受信任的代码使用库。

请参见

参考

TestContext 类

Microsoft.VisualStudio.TestTools.UnitTesting 命名空间

其他资源

如何：创建数据驱动的单元测试

How to: Configure a Data-Driven Unit Test

Using the TestContext Class