如何解决如何模拟方法并返回由其回调设置的结果?
我正在使用下面的代码来模拟UserManager
。
我遇到的问题是oResult
仍然为空。但是我无法在回调之外给它赋值,因为密码仅在回调内部可用。我不能只返回预定值(例如IdentityResult.Success
),因为结果必须在运行时生成。
这三个问题是相似的,但它们并不能完全解决问题:
- validate MOQ unit test method return value(这是最近的)
- mocking a method using Moq framework doesn't return expected result
- Moq setting method return value
所有这些与我的情况之间的区别在于,在我的方法中,方法的必需输入值仅在回调中可用。
我正在使用它来测试控制器的行为。
如何为模拟方法(在这种情况下为CreateAsync()
)执行回调并返回其结果?
Protected Function UserManagerMock(Of TUser As Db.User,TCity as Db.City)(Users As List(Of TUser)) As Mock(Of UserManager)
Dim oManagerMock As Mock(Of UserManager)
Dim oStoreMock As Mock(Of IUserStore(Of TUser))
Dim oCallback As Action(Of TUser,String)
Dim oManager As UserManager
Dim oResult As IdentityResult
Dim oSetup As Expression(Of Func(Of UserManager,Task(Of IdentityResult)))
oStoreMock = New Mock(Of IUserStore(Of TUser))
oManagerMock = New Mock(Of UserManager)(oUserStoreMock.Object)
oManager = oUserManagerMock.Object
oCallback = Sub(User,Password,City)
oResult = oManager.PasswordValidator.ValidateAsync(Password).Result
If oResult Is IdentityResult.Success Then
User.PasswordHash = oManager.PasswordHasher.HashPassword(Password)
Users.Add(User)
End If
End Sub
oManager.PasswordValidator = New PasswordValidator
oManager.UserValidator = New UserValidator(Of TUser)(oManager)
oSetup = Function(Manager) Manager.CreateAsync(It.IsAny(Of Db.User),It.IsAny(Of String),It.IsAny(Of Db.City))
oUserManagerMock.Setup(oSetup).ReturnsAsync(oResult).Callback(oCallback)
Return oManagerMock
End Function
解决方法
这可以通过完全取消回调,而使用a
来完成Func(Of ...,Task(Of IdentityResult))
在设置的Returns()
调用中。
示例:
Protected Function GetUserManager(Users As List(Of Db.User)) As UserManager
Return Me.GetUserManagerMock(Of Db.User,Db.City)(Users).Object
End Function
Private Function GetUserManagerMock(Of TUser As Db.User,TCity As Db.City)(Users As List(Of TUser)) As Mock(Of UserManager)
Dim oManagerMock As Mock(Of UserManager)
Dim oStoreMock As Mock(Of IUserStore(Of TUser))
Dim oManager As UserManager
Dim oReturn As Func(Of TUser,String,TCity,Task(Of IdentityResult))
Dim oResult As IdentityResult
Dim oSetup As Expression(Of Func(Of UserManager,Task(Of IdentityResult)))
oStoreMock = New Mock(Of IUserStore(Of TUser))
oManagerMock = New Mock(Of UserManager)(oUserStoreMock.Object)
oManager = oUserManagerMock.Object
oReturn = Async Function(User,Password,City)
If City.IsNothing Then
oResult = IdentityResult.Failed($"{NameOf(City)} is required.")
Else
oResult = Await oManager.UserValidator.ValidateAsync(User)
If oResult Is IdentityResult.Success Then
oResult = Await oManager.PasswordValidator.ValidateAsync(Password)
If oResult Is IdentityResult.Success Then
User.PasswordHash = oManager.PasswordHasher.HashPassword(Password)
Users.Add(User)
User.CityId = City.Id
User.City = City
City.Users.Add(User)
End If
End If
End If
Return oResult
End Function
oSetup = Function(Manager) Manager.CreateAsync(It.IsAny(Of Db.User),It.IsAny(Of String),It.IsAny(Of Db.City))
oManagerMock.Setup(oSetup).Returns(oReturn)
Return oManagerMock
End Function
像这样使用它:
<Fact>
Public Async Function CreateUser() As Task
Dim oUserManager As UserManager
Dim oResult As IdentityResult
Dim sPassword As String
Dim oUser as Db.User
Dim oCity as Db.City
sPassword = "P@ssw0rd!"
oUser = New Db.User With {.FirstName = "User",.LastName = "Name",.UserName = "user.name",.Email = "username@domain.com"}
oCity = New Db.City With {.Id = 1,.Name = "BigCity",.Code = "L69CNV5"}
oUserManager = Me.GetUserManager(Me.Users)
oResult = Await oUserManager.CreateAsync(oUser,sPassword,oCity)
Assert.True(oResult.Succeeded)
End Function
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