private static void testTables(ExcelReader target)
{
DataSet set = target.GetWorksheet();
Assert.AreEqual(4, set.Tables.Count);
Assert.AreEqual("Plan1", set.Tables[0].TableName);
Assert.AreEqual("Plan2", set.Tables[1].TableName);
Assert.AreEqual("Plan3", set.Tables[2].TableName);
Assert.AreEqual("Sheet1", set.Tables[3].TableName);
}