webAPI xUnit单元测试

通常我们在编码完成功能后，都需要进行单元测试，编写单元测试的好处在于有助于代码维护。

一、测试框架MSTest与xUnit比较

二、webAPI 创建xUnit单元测试

1、使用VSCode创建webAPI项目（命令 dotnet new webapi）

2、使用VSCode创建xunit项目（命令 dotnet new xunit）

3、xunit 项目添加对webAPI项目的引用

4、单元测试代码示例

using System;
using System.Collections.Generic;
using Microsoft.AspNetCore.Mvc;
using UnitTestCommonLib;
using UnitTestWebAPI.Controllers;
using Xunit;
namespace WebAPIUnitTest
{
[Collection("Sequential")]
public class ClerkUnitTest
{
CommonHelper commonHelper = new CommonHelper();
ClerkEntities clerkEntities = new ClerkEntities();
/// <summary>
/// test GetClerkList
/// </summary>
[Fact]
public void GetClerkList()
{
//create test data for CSB004
var clerkList = new List<CSB004>
{
new CSB004 { Ucode = "000000000001", ClkCode = "0000000001", ClkName = "clkname1", ClkGrpCode = "000001", DrawerNumber = "1", ClkIntCode = "000001", NbchkNumFrom = "000001", NbchkNumTo = "000009", Unusable = "0", CreateDateTime = DateTime.UtcNow.ToString ("yyyyMMddHHmmss"), UpdateDateTime = "" },
new CSB004 { Ucode = "000000000001", ClkCode = "0000000002", ClkName = "clkname2", ClkGrpCode = "000001", DrawerNumber = "1", ClkIntCode = "000001", NbchkNumFrom = "000001", NbchkNumTo = "000009", Unusable = "0", CreateDateTime = DateTime.UtcNow.ToString ("yyyyMMddHHmmss"), UpdateDateTime = "" },
new CSB004 { Ucode = "000000000002", ClkCode = "0000000002", ClkName = "clkname2", ClkGrpCode = "000001", DrawerNumber = "1", ClkIntCode = "000001", NbchkNumFrom = "000001", NbchkNumTo = "000009", Unusable = "0", CreateDateTime = DateTime.UtcNow.ToString ("yyyyMMddHHmmss"), UpdateDateTime = "" }
};
clerkEntities.csb004.AddRange(clerkList);
clerkEntities.SaveChanges();
//create test examples
var testcol = new GetClerkListController();
GetClerkListController.InputModel input = new GetClerkListController.InputModel();
// data exist
input.Ucode = "000000000001";
var actualValue = testcol.GetClerkList(input);
var actualModel = JsonHelper.JsonToEntity<CommonHelper.ReturnInfo>(actualValue);
//No data exist -No data in CSB004
input.Ucode = "000000000003";
var actualValue1 = testcol.GetClerkList(input);
// when ucode is empty
input.Ucode = "";
var actualValue2 = testcol.GetClerkList(input);
var actualModel2 = JsonHelper.JsonToEntity<CommonHelper.ReturnInfo>(actualValue2);
//clear test data
clerkEntities.csb004.RemoveRange(clerkList);
clerkEntities.SaveChanges();
//verify
Assert.NotNull(actualValue);
Assert.Equal(CommonHelper.ERROR_CORRECT, actualModel.errorcode);
Assert.Equal(commonHelper.ReturnCodeMessage(CommonHelper.ERROR_NORECORD), actualValue1);
Assert.Equal(CommonHelper.ERROR_REQUIRED, actualModel2.errorcode);
Assert.Equal("Ucode", actualModel2.maininfo);
}
}

5、注：测试类中的[Collection("Sequential")]标注，防止同一个单元测试项目中，不同测试类中的不同测试方法在测试运行时，出现数据冲突，造成测试失败

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