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对Recorded Item动态调用OM Methods进行测试，界面如下：

输入Site的URL，File在SharePoint中的相对URL，并选择OM操作类型，点击Test进行测试。代码如下：

using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Linq;using System.Text;using System.Threading.Tasks;using System.Windows.Forms;using Microsoft.SharePoint;namespace RecordsOMTest{    public partial class Form1 : Form    {        public Form1()        {            InitializeComponent();            OMMethods_comboBox.Items.Add("Rename");            OMMethods_comboBox.Items.Add("File item delete");            OMMethods_comboBox.Items.Add("File delete");            OMMethods_comboBox.Items.Add("File item recycle");            OMMethods_comboBox.Items.Add("File recycle");            OMMethods_comboBox.Items.Add("File undo check out");            OMMethods_comboBox.Items.Add("File check in");            OMMethods_comboBox.Items.Add("File check out");        }        public delegate void CallOMMethod(SPFile file);        private void test_button_Click(object sender, EventArgs e)        {            /*                Block delete test.            */            //Rename test.            CallOMMethod Rename = file => { file.Item["Name"] = "kkk.txt"; file.Item.Update(); };            //Delete test 1.            CallOMMethod delete1 = file => { file.Item.Delete(); };            //Delete test 2.            CallOMMethod delete2 = file => { file.Delete(); };            //Delete test 3.            CallOMMethod delete3 = file => { file.Item.Recycle(); };            //Delete test 4.            CallOMMethod delete4 = file => { file.Recycle(); };            /*                Block edit and delete test.            */            //UndoCheckOut test.            CallOMMethod UndoCKOut = file => { file.UndoCheckOut(); };            //CheckIn test.            CallOMMethod CkIn = file => { file.CheckIn("Check in."); };            //CheckOut test.            CallOMMethod CkOut = file => { file.CheckOut(); };            switch (OMMethods_comboBox.Text)            {                case "Rename":                    //Rename test.                    DoOMTest(Rename);                    break;                case "File item delete":                    DoOMTest(delete1);                    break;                case "File delete":                    DoOMTest(delete2);                    break;                case "File item recycle":                    DoOMTest(delete3);                    break;                case "File recycle":                    DoOMTest(delete4);                    break;                case "File undo check out":                    DoOMTest(UndoCKOut);                    break;                case "File check in":                    DoOMTest(CkIn);                    break;                case "File check out":                    DoOMTest(CkOut);                    break;            }        }        private void DoOMTest(CallOMMethod cm)        {            using (SPSite site = new SPSite(siteUrl_textBox.Text))            {                SPWeb web = site.RootWeb;                SPFile file = web.GetFile(filePath_textBox.Text);                try                {                    cm.Invoke(file);                    //Reach this step means test failed.                    result_richTextBox.Text = "Test failed.\r\n";                    result_richTextBox.SelectionColor = Color.Red;                }                catch (Exception ex)                {                    result_richTextBox.Text = "Test passed.\r\n";                    result_richTextBox.Select(0, result_richTextBox.Text.Length);                    result_richTextBox.SelectionColor = Color.Green;                    result_richTextBox.Text += string.Concat(ex);                }             }        }    }}

提取每个OM Methods单元测试中的公共部分写成DoOMTest(CallOMMethod cm)方法，对于每个测试中不同的部分通过调用一个委托方法（橙色字体）来代替。然后我们对委托方法的类型进行声明（委托方法需要传入一个SPFile类型的参数）：

public delegate void CallOMMethod(SPFile file);

再根据每个测试中的不同部分内容对委托进行实例化：

//Rename test.CallOMMethod Rename = file => { file.Item["Name"] = "kkk.txt"; file.Item.Update(); };//Delete test 1.CallOMMethod delete1 = file => { file.Item.Delete(); };//Delete test 2.CallOMMethod delete2 = file => { file.Delete(); };//Delete test 3.CallOMMethod delete3 = file => { file.Item.Recycle(); };//Delete test 4.CallOMMethod delete4 = file => { file.Recycle(); };//UndoCheckOut test.CallOMMethod UndoCKOut = file => { file.UndoCheckOut(); };//CheckIn test.CallOMMethod CkIn = file => { file.CheckIn("Check in."); };//CheckOut test.CallOMMethod CkOut = file => { file.CheckOut(); };

这就是委托在测试中的妙用，极大的减少了重复代码量。