c# - Asp .Net Core 单元测试模拟 UserManager.CreateAsync 并返回身份结果
问题描述
在 .Net Core 项目上工作并创建了以下服务以跨页面共享通用方法。
namespace MyApp.Tests.Services
{
public class UserServiceTest
{
[Fact]
public async Task CreateUser_ShouldCreateUser()
{
var user = new UserResponse
{
Id = "111",
Email = "john@email.com",
FirstName = "John",
LastName = "Doe",
CompanyName = "SomeCompany",
PhoneNumber = "9123456789"
};
var appUser = new ApplicationUser
{
UserName = user.Email,
Email = user.Email,
FirstName = user.FirstName,
LastName = user.LastName,
CompanyName = user.CompanyName,
PhoneNumber = user.PhoneNumber
};
var logger = Mock.Of<ILogger<UserService>>();
var mockUserStore = new Mock<IUserStore<ApplicationUser>>();
mockUserStore
.Setup(x => x.CreateAsync(appUser, CancellationToken.None))
.ReturnsAsync(IdentityResult.Success).Verifiable();
// Tried this one as well but still getting null instead of IdentityResult
// mockUserStore
// .Setup(x => x.CreateAsync(appUser, CancellationToken.None))
// .ReturnsAsync(new IdentityResultMock(true));
var userManager = new UserManager<ApplicationUser>(mockUserStore.Object, null, null, null, null, null, null, null, null);
var _userService = new UserService(userManager, logger);
var result = await _userService.CreateUserInApp(user);
Assert.True(result.Succeeded);
}
}
public class IdentityResultMock : IdentityResult
{
public IdentityResultMock(bool succeeded) {
base.Succeeded = succeeded;
}
}
}
还为该服务编写了单元测试用例,如下所示来测试 UserService
namespace MyApp.Tests.Services
{
public class UserServiceTest
{
[Fact]
public async Task CreateUser_ShouldCreateUser()
{
var user = new UserResponse
{
Id = "111",
Email = "john@email.com",
FirstName = "John",
LastName = "Doe",
CompanyName = "SomeCompany",
PhoneNumber = "9123456789"
};
var appUser = new ApplicationUser
{
UserName = user.Email,
Email = user.Email,
FirstName = user.FirstName,
LastName = user.LastName,
CompanyName = user.CompanyName,
PhoneNumber = user.PhoneNumber
};
var logger = Mock.Of<ILogger<UserService>>();
var mockUserStore = new Mock<IUserStore<ApplicationUser>>();
mockUserStore
.Setup(x => x.CreateAsync(appUser, CancellationToken.None))
.ReturnsAsync(IdentityResult.Success).Verifiable(); ;
var userManager = new UserManager<ApplicationUser>(mockUserStore.Object, null, null, null, null, null, null, null, null);
var _userService = new UserService(userManager, logger);
var result = await _userService.CreateUserInApp(user);
Assert.True(result.Succeeded);
}
}
}
在用户服务中运行测试时
var createResult = await _userManager.CreateAsync(appUser);
createResult 由于此测试用例失败并出现空引用异常,我得到空值。如果我可以从模拟 CreateAsync 设置返回 IdentityResult,那么它将通过但不确定我在做什么错。也无法创建 IdentityResult 的对象,因为“成功”受保护并且无法显式分配值。请帮忙。谢谢 :)
解决方案
我们需要看看构造函数内部发生了什么:
var userManager = new UserManager<ApplicationUser>(mockUserStore.Object, null, null, null, null, null, null, null, null);
但不是真的。如果你在UserService
这里测试,那么你应该嘲笑的是UserManager
而不是它的内部依赖IUserStore
。
这是为什么?因为可能会改变内部结构UserManager
,然后您必须同时更改UserManager
测试和UserService
测试。
UserManager
像对 the 所做的那样模拟创建,IUserStore
您会看到它是 UserStore 中的其他一些依赖项,或者完全超出单元测试范围的某个地方。
编辑 1
我想我发现了你的问题:
mockUserStore
.Setup(x => x.CreateAsync(appUser, CancellationToken.None))
.ReturnsAsync(IdentityResult.Success).Verifiable();
和调用
var result = await _userService.CreateUserInApp(user);
User 对象和 appUser 对象不一样,所以 mocking 框架没有返回预期值。
为确保这是问题所在,请尝试使用
mockUserStore
.Setup(x => x.CreateAsync(It.IsAny<ApplicationUser>(), It.IsAny<CancellationToken>()))
.ReturnsAsync(IdentityResult.Success).Verifiable();
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