在单元测试中添加模拟数据表

Question

我是单元测试我的一个功能.这是我的代码:

public void TestLabels()
{

  //Step 1: Creating a mock table with columns exactly like in the real table.
  DataTable table = new DataTable();

  DataRow mydatarow;
  mydatarow = table.NewRow();

  //Step 2: Adding the row as same as the Real Data!

  mydatarow["Name"] = "Test";
  mydatarow["Address"] = "00000 ST.";
  mydatarow["ZipCode"] = "77665";
  mydatarow["Tracking#"] = "";

  table.Rows.Add(mydatarow);

  foreach (DataColumn column in table.Columns)
    Console.WriteLine(column.ColumnName);

  //Step 3: Call method we are testing.
  var updateTable = IceTechUPSClient.Instance.CreateLabels(table);

  foreach (DataRow row in updateTable.Rows)
  {
    var trackingNumber = row["Tracking#"].ToString();
    Assert.IsFalse(String.IsNullOrWhiteSpace(trackingNumber), "Expecting tracking number generated for every row!");
    Assert.IsTrue(File.Exists(trackingNumber + ".gif"));
  }

}

现在我收到一个错误:列'Name'不属于表.如您所见,我在此处指定了列名"Name",并添加了该特定行.那我为什么会收到这个错误？有帮助吗？

谢谢!

Answer 1

您尚未设置列(除非您错过了示例中的某些代码).

您需要创建具有所需名称的列,然后才能访问它们,如下所示:

var columnSpec = new DataColumn
                    {
                        DataType = typeof(string),
                        ColumnName = "Name"
                    };
this.table.Columns.Add(columnSpec);

如果您已设置AutoGenerateColumns为true(默认值),则从数据库中读取数据时,您无需明确地执行此操作,因为它是在幕后为您完成的.