Moq setup multiple calls To support multiple I am trying to structure my unit test in such a way that if I change the constructor of the object being tested I don't have to change a lot of tests. You call Setup method for any or You also make use of Moq's static Times class, which provides various options for setting expectations for the number of times a method or property was called. Once we've executed the method that we're testing (Reverse), we want to determine if we're actually Moq has a little-known feature called Capture. Let's assume we have Moq has a built-in way of doing this – SetupSequence. I dug into the moq github repo. Throws() on Mock. I have a callback method called filter that take in a function and a single string parameter. IsAny<string>(), It. The way you do this with Moq is by Moq now has an extension method called SetupSequence() in the Moq namespace which means you can define a distinct return value for each specific call. - stakx/Moq. we are using Moq and XUnit for testing Can anybody let me knw how can I mock only the GetUser and CreateUser and write unit test for the I have a test where at some point two lists are compared. VerifyAll() @Danielku15, it is my understanding that Moq 5's main API is really quite different from Moq 4's (it's a new major version for good reason!). DoThing(It. Here's a sample code of my unit test [Test] [TestCase("foo", false, 2)] [TestCase("foo", true, 3)] public void I am working on xUnit test using moq and Fixture in . If you want the mocked dependency to return different canned values on each call, then use SetupSequence and then chain as many Returns / ReturnsAsync for each result. When calling the mocked method for the second time, after changing the return value from the first call, the moq framework returns the modified object. I have another class called AdvancedMath which has a function 'int Square(int a)', the body calls In the last blog post I talked about how to use Moq’s built in SetupSequence to create a “chain” of actions to execute for subsequent calls of the same mocked method. Instead of checking that a particular method wasn't called, you check that no unexpected calls were made in general. IsAny<MyClass>)) . This When you’re mocking a method that’s called multiple times, you may want to change the behavior of the method each time it’s called. All dynamic mock libraries (with the exception of TypeMock) work by dynamically emitting classes that derive from the type in question. My test looks something like: var callback = new idnameobject(); wsMock . moqActionFactory. I have solved that partially, but I would still like to have the assertion in the setup (e. Here's how you can seamlessly integrate Moq into your project and In Moq 4. Hence, your mock object's setup does not get hit. You can use the Callback method (see also in the Moq quickstart Callbacks section) to configure a callback which gets called with the original arguments of the mocked method call (AuthoriseUser) so you can call your onSuccess and onFailure callbacks there: var I am trying to use Moq to assign a property when a method is called. MOQ - setting up a method based on argument values (multiple arguments) 6 Unit testing with Moq 11 Moq Params 171 Moq mock method In last week’s part of the series, we looked at the two ways that we can set up testing mocks using Moq. DoSomeStuff()). In my code, filter is called two different times with different methods and parameters. ReadLine()). Verify WE have service which calls method GetUserAccountNo() in turn call other two (GetUser, CreateUser) in that service . When the call to the property is being intercepted, the setup: I am setting up my moq to return the callback, so I can interegate the parameters I have called the web service with. // Example of chaining Returns for multiple calls mockService. when I call AssertRequestParameters). ValidateUser(It. We want to write some tests to mock this behavior. Is there a way to set the parameter different for each instance filter is called? I'm attempting to mock and setup chained methods using Moq. Add("my string") . Where(t =& Stack Overflow for Teams Where developers & I was creating a couple of Unit Tests where I wanted to verify if a method is called with a parameter whose properties I was expecting. Introduction In this article we will understand various mocking setups using Moq framework. This is because of how Moq works internally, but I'd hesitate to call it a bug and there is a bug filed for it. SetupSet(m => m. 13 the It. You can set a This works well when a method only performs a single call. I have tried the following: provider. dataFactoryMock . Strict: if you get NULLs from Mock, then always try MockBehavior. We know that I have a unit test method that needs to mock (stub?) two repository method calls in the class that I'm testing. ReturnsAsync If you want multiple Setups that are conditional, to return different values based on the arguments, then see How to setup a method twice for different parameters with mock. Once()) for each call that I expect - often with a for loop. Returns(11); // assuming appropriate ctors var testableEntity = new TestableEntity var result What I want to do is to define one or more Setup(s) to one Return call on multiple method calls of the mocked object; hence avoiding multiple single calls to do Setup(). I try to use the SetupSequence method of the Moq 4. I am trying to learn how to use Moq to do unit testing with C#. So in that case, it is The last link was somewhat helpful, but only seemed to go so far as to say that it wasn't elegant syntax. Invocation to determine a "match" for verification. Returns(true) . You might want a different result on the 1st call to all subsequent calls If your function takes a number of parameters, you don't need to specify a setup and verify which can be very verbose. AddRecord(null)) calls public ISetup<T> Setup(Expression<Action<T>> expression) in WhenPhrase. Display(firstColor)); mock. Overloading IExpect. moqUser. Before we can verify multiple calls, we need to set up our mock object. The next link in the chain will be One area where using MoQ is confusing is when mocking successive calls to the same method of an object. GetCallbackMessage() callback, but that did not work. Maybe something like this: As you We know that we can have multiple setups for the same mock, and As for multiple calls there are several approaches. Setup(x => x. On display once more within the previous code snippet, is the readability benefit of Moq. : Since your mock does not have behavior Strict, it will be happy with calls that you haven't even set up. I'm trying to write a Unit Test with Moq to verify that a Registration was successful. You are correct that the second expectation is overwriting the first. I get a Moq object to return different values on successive calls to a method. But that's not quite right: your calls to Setup of Calculate are identical and thus the second one overrides the first. e. GetNumber()) . Every example I've worked through until now shows one setup method for the Mock, but now I need two. 1. Verifiable() called along with Verify(), basically does a Verify(SomeExpression, Times. - in the first call, I get a jwt token I am aware of SetupSequence method in Moq which I can use to return multiple data tables from the mocked method everytime that method is called. The former can but this of course made only the last setup effective (when count = 3). Note that Setup expects an expression tree. Query() . The AddToQueue me I think that you need to change the Returns to just return true instead of the lambda. In this test, I have to mock two httpClient calls. Strict); MockBehavior. g. Fortunately, there are many overloads of the Returns method, some of which accept functions used to return the value when the method is called. Bit late to the party, but if you want to still use Moq's API, you could Handling Multiple Return Values Moq allows you to handle scenarios where you need to return different values for multiple method calls. Multiple nested lambda expressions with lots of parentheses are hard to read. . Calling it once works, calling it a second time returns 0 elements So far I've figured out how to create the objects I need to setup for the Mock, but I just can't figure out how to dynamically call Moq's Setup() passing in the property names. The problem is that if the method is called 4 times, I have to write: mock. Rather than generate your own User object you could call It. [TestMethod] public void CreateFinishTest() { // mock methods Summary By default, Mocks created in Moq return empty values when calling unconfigured methods. Setup The way you prepare the mocked user is the problem. Verify(m => m. Allows you to specify the number of times a specific call So even without calling Setup, Moq has already stubbed the methods for IPrinter so you can just call Verify. For setting up and verifying a function that is called multiple times, I usually call setup or verify (Times. And each time with a different parameter. DoSomethingAsync(It. Fizz(), Times. setup the mock to do what you want. You don't need to setup a behavior for methods that will be called. Option #1 Use Setup instead of SetupSequence mock. Clear) to do so. One common scenario is setting up multiple calls to a method or property on a In this guide, we will delve into how to verify multiple method calls using Moq in C#. Callback<idnameobject, int>((obj, id) => callback = obj); await myservice. // matching Func<int>, lazy evaluated mock. Name = username; will not set the name, unless you have setup the mock properly. Compile(). Setup and multiple . Thus, it will make sure the mock was never The default behaviour of a Moq Mock object is to stub all methods and properties. Update(It. Sequences which provides the ability to check ordering in Moq. For example, I was writing some tests for legacy code where I Here's how you can achieve this using a single Moq setup: . In, which can capture arguments passed to a method. 12, it explicitly reset everything about the mock, from setups to event handlers. SetupSequence(x => x. Setup(factory => factory 2. In that case a "default" is There are multiple ways to fix your problem, let me show you the three most basic ones. Class that should be mocked: public class OutputManager { public virtual string WriteMessage(string message) { // write a m If OutputManager is a dependency for other classes then you should consider abstracting that class to make it easier to mock for your tests. IsInRange( interval - shorter, interval + SetupSet can be used to setup a property setter - it is fairly unusual to need this, as arguments passed to Set typically don't need to be captured, as the calls to the Setter can be verified with a Moq . Verify calls. 2 for this test Basically, I'm testing a class that deals with EntityFramework. I think I may be a bit confused on the syntax of the Moq Callback methods. VerifyNoOtherCalls(); That method makes sure no calls were made except for any previously verified ones. Start()). In the Moq source they actually boil down to the same code so either get the job done just as well. IsAnyType and It. Share Improve this answer edited May 31 The different overloads of Returns<T> behaves differently: The one with T Returns<T>(T value) what you are using is always returning the same instance. This means that you can focus your time and energy on testing the logic of your code rather than on designing tests. Consider the scenario where you have a method you’re calling that you want to be successful the first time you call it, but where subsequent calls should fail (such as trying to Using Verify Now that we've got our mock created, let's write our first unit test to use the verification feature of Moq. If you are setting up multiple mocks in a If I want to mock a class that returns a string that is used to determine whether while loop should continue (imagine read while string != null), how can I set the expectation. IsAny<idnameobject>(), It. Setting Up Moq in Your C# Project As a seasoned web developer, I know that setting up Moq in your C# project is the first step towards harnessing the power of mocking for effective testing. Without seeing your full code, perhaps you are already using conditional Setups. My Test is as follows: [TestMethod()] public void RegisterTest() { //Arrange var I discovered an easier way to do it. Execute("ping")) . The last call wins and nullifies the previous two calls. And also remember to execute "Verify" method AFTER the method you're testing should be called (so it's ok in your case). VerifyAll() or mockRepo. net in class method calls 0 Add a method to the setup of a Moq test 13 Moq Setup override 2 Moq and multiple method setup 0 Moq C# call method to test Hot Network Questions Does DOS require partitions to be aligned at a cylinder boundary . The reason is that C# doesn't support Action and Func delegates with ref parameters: to obviate this issue, we define a custom delegate and we use it to create a callback function that Moq will invoke Setup and SetupSequence -- the former is unbounded, the latter is bounded (it will throw if the method is called too many times). I'm looking for an explanation of exactly how moq's Setup method works when setting up a mock object that will be called multiple times from the 'system under test' (sut) For example: If I have a mock object setup and call my Sut method. it verifys the expression was called only. This means that a call to that method/property with any parameters will not fail and will return a default value for the particular return type. Print("abc_4") IMyPrinter _ => _. Capture and Moq. I'm trying to use Moq to mock a rather large set of interfaces in an object. When some setup is not prepared, Moq by default returns NULL. Entry(betToUpdate). actually that is not true, if you look closely to the test output you will see that it contains 4 calls with the value of 4!: IMyPrinter _ => _. Get(It. Is<XmlDocument>(y => ReferenceEquals(o1, y Expanding on SoaperGEM's answer, all methods that return something (no matter the type) must have that return value specified before triggering the event. Throws<System. Setup(ms => ms. I am using Moq to mock the result of the the AddToQueue method within the AddRecordToQueue method. GetValue(1)). TestMethod(It. MyMethod is called? I don't see how you can do this with a dynamic mock library. Setup(p => p. What happens in the black box, stays in the black box. In(calls Well in that case the problem can be reduced to passing the proper expression tree to Setup. I want my code look like this: mock. if I have such an interface: namespace Years ago there was, If I am not mistaken was to have one test method and take parameters in through the method, and these params would be setup with Moq and each diff set of params would create a new test I cant remember what it was called and I have been I was unaware of the Moq. But since all setups reference to the same location - they all reference to the last value of i, which it had at the end of the loop. Since async methods return Task, async methods fall into this category. You can use the specific parameters to isolate I'm trying to write a unit test using Moq and xunit. Returns(() => calls) . to just return true instead of the lambda. Setup(foo => foo. When I try to do something like this: IFilter filter = new Filter(); List<IFoo> objects = new List<IFoo> { ne This is because the way how are we using Return method if we are using Return(GetObject2(object1)) object1 never got initialized from callback, so it will fail to convert @mattumotu: That's not what I experience, Moq just has a strange execution policy. Setup(foo => foo I have a method called GetTasks() that returns 10 tasks objects. "No setups configured. Times(Times. Once()); // Can someone please look at the code below and see what's wrong? [TestInitialize] public void SetupMockRepository() { var memberId = "34345235435354545345"; var title = "test"; var url = " Allows verifying whether method calls in a Moq setup are invoked in the correct order. AddNumbersBetween(1,4), Times. DoThisAsync(myobj, In this case, all you want to test is that BuildVM is called and the result is returned so you don't need to mock the inner dependencies. IsAny<int>()) . Setup(x=>x. Setup() overrides the Callback() action and never calls it. That’s the approach I When you call mocked function - Moq will compare argument you passed with available setups. Verify() in the // Assert section, however, in case of multiple invocations with different/modified args, it seems better to have a single . IsAny<string>())). Should(). I have a method that returns a string, and I was trying to figure out why I couldn't trigger the event with the Mock object. I have two classes, an interface and and an implementation: public class Vehicle{ public string RegistrationNumber {get; set;} public long I have some troubles using Moq. ) I'm new to unit testing and am having some trouble. Basically those setups help during the of unit testing of an application. Invoke() won't be executed, but instead it'll be transformed to an Later in the code, betRepository. IO. Returns(numberQueue. Setup Moq To Return Multiple Values Ask Question Asked 12 years, 2 months ago Modified 12 years, 2 months ago Viewed 3k times Your UserHostAddress property might be called few times in call to Any, and we do not know how many times it's gonna). If we wanted two different return values when this method is called, we might instinctively write a test like this: Hi @steventmayer, I may have some time in December to look at this, from a first glance at the specs, I would check the behaviour of Moq in this case, I have a feeling that it overrides the previous setup, too. In tests I need to setup this function so it returns correct Yeah, I'm not a black box testing kind of person. All I know is that mockRepo. The method under test returns the latest time from two dates, so I create two datetime objects and pass them to my function. It's just the opposite of what one would expect: Usually the first match is returned and the Whenever I call . The rest of the test is I have a mocked executor that Asserts the unit after x amount of callbacks depending on what values we give to the parameters. Setup(x => x. While this is an answer to my specific case it would be nice to see if there is a way to allow for multiple unknown amount of returns on a setup in Moq before another In the arrange section, we setup that: the first call to GetIntValue returns 0 the second call returns 1 the third call returns 2 We achieve that by just calling InSequence() on the Arrange. Verify(x => x. AB. Returns("One"); mockService You may pass ranges of items and verify calls by comparing if two arrays contains the same elements (using SequenceEqual): MOQ - setting up a method based on argument values (multiple arguments) 12 Moq - Verify method call that has a params value 28 mock . You may want to read my post that describes the following: Supports method invocations, property setters and getters. 8 or later) This answer is an indirect approach. How can I do this ? i. Currently in moq you Moq is a great tool but you have to admit that this code is pretty ugly. Example, mock. The setup is a bit more convoluted here. Return("1,10,20 I'm attempting to test an async process where multiple requests are made to a service with different values which result in multiple completion events being raised. I started with this mocked method: mock. If you invoke a sequence setup too many times, it'll simply return a default value / do nothing. 8 or later): mock. IsAny<string>()) ). Strict. When you copy loop variable to You don't need to setup a Mock multiple times, if all the Mocked calls are to return the same value. AtleastOnce()); I cant figure out how to setup the method AddNumbersBetween such that if the upperVal is lower than the lowerVal an exception is thrown Moq now has an extension method called SetupSequence() in the Moq namespace which means you can define a distinct return value for each specific call. The example below shows one method that i need to test. You can get around some of Setup Moq to return different values on multiple calls at 9:54 PM I recently came across a problem, using the Moq mocking framework, in which a few tests, required a method on one of my mocked objects to be called multiple times but return a different value I would have assumed it would work as you expected as well, but I also get the same results. I have multiple GetReport methods with different I'm new to C# Moq (used Rhino Mochs in the past) and needing to test a sequence of calls to the same method. So, what is the way for testing the method DoStuff below? Is it three separate tests, with proper Setup's for each interface case? Or, is it one test with Setup's and Returns, more like a And now you want to verify that base. TeamMembers . Later added Setup calls are evaluated first (or always all are evaluated and last wins). public JsonResult Submit(FormModel form){ RequestObj and then verify that it was called mock. We can do this quickly and succinctly with the newer Linq to Mocks syntax, or We can use a fluent syntax that offers greater control. While this is an answer to my specific case it would be nice to see if there is a way to allow for multiple unknown amount of returns on a setup in Moq before another As of this commit Moq now supports the mocking of delegates, for your situation you would do it like so: var fooMock = new Mock<Foo>(); var a = new A(fooMock. I want to moq this task for unit testing purposes. Object. AssignProperty(y I assume you are trying to essentially perform a new Setup() on your If using MOQ 4 one can use SetupSequence, else it can be done using a lambda Using SetupSequence is pretty self explanatory. Let's assume I have the interface public interface A { int Foo1(); int Foo2(); int Foo3(); } and a testing method with a mock (using Moq) like Mock<A> mock = new Mock<A>(); Now there are basically two testing scenarios: Scenario 1 I want to test what my system Our comparison of Rhino Mocks, Moq and NSubstitute continues with a look at how multiple calls to a mock are handled and what you do if you want to alter the return values on subsequent calls. One Setup will service all calls with the given result. Calling original method with Moq Ask Question Asked 14 years, 6 months ago Modified 2 years, 6 months ago Viewed 32k times 69 I have a ProductRepository with 2 methods, GetAllProducts and GetProductByType, and I want to test the logic at I also tried to do the setup in my facade. UpdateBet(bet) is called, but its not my mocked method which gets called, instead, the class's method gets called: public virtual Bet UpdateBet(Bet betToUpdate) { siteContext. Verify(f => f(5), Times. So I'll ask here. I read a few tutorial on Moq C# package but I still can't really understand what is Setup and Returns in Moq. In this particular case, there are no mock. var inputParamObject I want a mock that returns 0 the first time, then returns 1 anytime the method is called thereafter. Year I'm not too sure how one might approach the tests for 2, 3, and 4 but in answer to the general question from the title, one can get different returns from multiple invocations of a mock by using a lamba in the Returns() clause. Sequences You can specify that a group of calls should be done in sequence multiple times. Get(myThing). Something along the lines of: Mock<ITimer> mock = new Mock<ITimer>(); mock. Interval = It. GetEmployeebyId(1)). SetupAllProperties(); This method will prepare all Hi I am new to Moq framework and have some questions about how to use it. We noted that it was As you can see we have a pretty basic setup here that uses a white-list approach to building up a list. However, by throwing an exception within the Callback, you can I'm using the moq framework by Daniel Cazzulino, kzu Version 4. IsAny<User>() and the test would run just fine. This appears to be a current limitation. The important point to not it that the return value is set at the time that the setup is declared. Now, when I mock MyClass with moq, i would like the first call to MyFunc to call the callback, and the second call to that function to raise some event, but after the using moq callback i cannot raise an event ! What can I do ? c# events callback moq Share @KuntadyNithesh, It will always return 0 (default int) if you do no setup the mock. How can I I believe this observed behavior is due to my re-use of the options object between calls to the runnerMock's Execute and the subsequent re-evaluation of the argument stored in Moq. Strict, it will There are many benefits of using the Moq testing framework: It is easy to set up a system under test – Moq makes testing easier because it generates appropriate mocks/stubs for you. Expect(r => r. While running the test for CheckOut it is giving null object in the result. In this example, I use it to increment a counter (line 6). Be(32) line because x4 is 43. Therefore . I can do it in 4 different statements but is there a way to achieve the same in a single Setup statement? var parametersMock = new Mock<IParameters>(); parametersMock. Dequeue); } What's the most succinct way to use Moq to mock a method that will throw an exception the first time it is called, then succeed the second time it is called? Stack Overflow for Teams Where developers & technologists share private knowledge with coworkers If you need to Setup a return value, as well as Verify how many times the expression was called, can you do this in one statement? From what I can gather, Moq's Setup(SomeExpression). Mock. this. When DoSomething is invoked, the variable holding the reference to the passed argument will be holding a reference to the newValue variable. CaptureMatch classes until seeing this answer. so my unit test now becomes. E. The general idea is (First off, please excuse the pseudocode. Dominic's answer is better than mine for your precise situation but I wanted to point out Callback for other similar situations. Try this before assigning values to properties: moqUser. ToList() . myInterface. Strict mocks can save you time by highlighting missing setup steps when you run your tests. NET CORE 5 application. 8. Write(Capture. 8 and have a method to mock and assert its parameter. I have a Moq object and I need to return values for 4 different arguments. Here is the method I am trying to mock: TeamMember teamMember = _unitOfWork . With it, you can verify call order like this: var calls = new List<string>(); var mockWriter = new Mock<IWriter>(); mockWriter. In the example bellow the first call will Unfortunately, MoQ doesn’t work that way. I want a suggestion is that approach correct because then I will have to create that many number of Data tables And in that case it fails at the first assertion because both calls to DateCreated return aTime. This modifier instructs TelerikJustMock to return the expected result in the order Im new to MOQ and I am a little confused with the setup method. I found this cool solution that tests a sequence of return values Try this: var moq = new Mock<IInterfaceHandler>(MockBehavior. Dequeue); After this change your test will fail at the x4. Object); Then you can verify the delegate was invoked: fooMock. IsEqual(List<string> a, List<string> b, ComparisonConfig conf) The above function returns true result if List A equals List B and false result otherwise. I'm using Moq version 4. Returns(new Queue<TResult>(results). I started looking at reflection to Invoke() Moq's Setup() method, but it got really ugly fast. SetupGet() is specifically for mocking the getter of a property. Here is the code: My question is, how do I setup Moq so that if the list of Severity passed in has a High Severity within, it will return 3 instead of There is 2 reasons why you might want to do this. I am using AutoMapper to map between I'm using Moq 4. Some methods perform multiple calls in a sequence. Setup(etc I don't think you can reset a mock like this. Consider that a thorough test of a mock does 2 things: If you have, then you know how tedious it can be to set up multiple mock setups just to achieve this. Reader. I was hoping that by setting mockTimer. The compiler prov Half the links I try off the Moq page are broken, including the one for their official API documentation. I setup a simple class, BasicMath that has a function int Multiply(int a, int b), the body just returns a * b. You do need to setup a return value for the BuildVM method in the Arrange section before you call the SearchPanel method. I want to moq so i can test a particular part of functionality (below is the simplistic version of the Code i could extract) The fluent/chain method so are designed so you can get object by an Id and When setting up a Moq object to return a specific value regardless of input parameters I currently have to effectively write out the full signature, e. You have to set it up yourself. All you need to do is switch the order of the two Setup() calls: membershipServiceMock. Is that possible? e. Is there a way to setup and verify a method call that use an Expression with Moq? The first attempt is the one I would like to get it to work, while the second one is a "patch" to let the Assert part works (with the verify part still failing) string goodUrl = "good-product I'm trying to verify that, a method in my moq mock object will be called upon two successive API calls. But there is a lazy version which uses Func<T>. Verifiable in setups and a single . Didn't have a choice there. Return()s. I was just demonstrating the test. I checked Moq's documentation and the following example seems to what I need. Say we have the following public interface Not sure if previous version didn't allow for that, but if you have different HTTP calls within the same method, you can Moq each of them by specifying the HttpRequestMessage, similar to what you did. IOException>(); Here you are configuring the dependency to throw an exception whenever the Get method is called, the rest of the methods from this interface are not being Test Setup Mock gives null object when the test hits the method inside the controller My controller's constructor has two dependencies which I mocked. Using the lambdas is not too messy. The app is WP7 application with the code & tests in WP7 Class Library projects, all other tests (with I am trying to write a simple test with moq. CalculateDiscount(Price, Discount) > 300; } In this case, given mock I recently created Moq. I guess this is because I am changing the same reference. cs and that is forwarded to internal static MethodCall Setup(Mock mock, I have the below class, and I am trying to test the method AddRecordToQueue. State = System. mock. 5 framework. However, as a good practice, I always set it up because we may need to enforce the parameters to the method to meet certain expectations, or the return value from the method to meet certain expectations or the number of times it has been called. So given this very simple system: public class Employee { public bool IsEmployed { get; set; } } public class DataStore { public I usually do prefer to have . I'm writing unit tests for a dotnetcore API. Example: _employeeRepositoryMock. You can try to this in your Product class: public bool GiveCard() { return _product. Reset in any mock using Moq 4. Here is a simplified example of my set up right now: [TestMethod] public void Test1() { _mockedObject1. If Unfortunately, Moq’s Setup() methods are only run once and thus, each Get() within my test returns the same top value from the stack on every call. I'd like to test a method called multiple times during test, in a way where the tested method output depends on its input. However if you instead do your setup as below, it will work as you want it to. Print("abc_4 In the Quickstart guide we find an example that shows us how to setup a different return value for each invocation as following // returning different values on each invocation var mock = new Mock<ifoo>(); var calls = 0; mock. AtLeastOnce)? i. I'm trying to capture the behavior of retaining a dirty flag when properties are set and I'm hoping there is a cleaner way to do this because I have many properties that need this setup. This works great for the simple case, but falls down when you have to do something a little more complicated like, say, issue a callback. Data Why it Modern answer (Moq 4. My test kicks off a process in which multiple Get() methods are called. 10. The Dispose method example is interesting, although, being an arse, Dispose is supposed to be safe to be called multiple times. Capture is a better alternative to Callback IMO. As a unit test newbie, I've been reading that one test should be for one method. Setup() can be used for mocking a method or a property. I need to test many similar methods public interface ITest { void Method1(bool readMode, List<int> list); void Method2(bool readMode, List<int> list); void Method3 Using Moq and looked at Callback but I have not been able to find a simple example to understand how Calling . When defining the behavior of your mock, you just chain together the desired result. _product object CalculateDiscount method is not used above. ValidateUser Moq allows you to set up mock objects with predefined behaviors, enabling you to isolate the code under test and focus on specific scenarios. One way to get around this would be to add a SetupSequence which I think may be not so difficult to implement and you would be able to setup multiple The disadvantage is that if Add is called multiple times then only the parameter passed in the last call will be checked (although you can additionally Verify that it was called once). SetUp(w => w. Verify() statements before it. I will give an example and hope for answers. Took a quick peek at the Moq source code and it looks like if you use Setup() on a property getter, it will call SetupGet(). If you have experience in unit testing then you are probably aware of these concepts. Setup(m => m. Returns to take an expression rather than a value as described here, and elaborated on here and here. Returns( new ValidUserContext() ); membershipServiceMock. But with MockBehavior. I'm attempting to unit test a controller method that makes two calls to a service, eg. Instead, if you know that Fizz should be called once when transitioning to state 1, you can do your verifies like this: objectUnderTest. Some workarounds have been devised as follows: Moq Sequences which can obtained here at github. The expression used in the Returns needs to match the number of matchers used in the setup There were two date-time argument matchers in the setup so there needs to be two used in the returns expression. An example could be a test that expects a resource to be opened, read I also tried to do the setup in my facade. How would I know what you want for your test. Reset(); How can I reset only the configured setups? I see no methods or properties (like Invocations. Once); Or: i am trying to learn to use Moq (4) to test the C# code below. The only difference with your code is rather than initializing it as Moq - Calling two functions in the same class, one real, one mocked Ask Question Asked 12 years, 11 months ago controllerMock. The part where Using VerifyNoOtherCalls (requires Moq 4. Callback((MyClass c) => I have used this approach to capture each instance of a request to a Using Callback Another approach is to use the built-in Callback that can execute on each method that is Setup on a mocked service. Following unit test throws an exception, even though the according method will be called. This is done by this extension method: public static void ReturnsInOrder<T, TResult>(this ISetup<T, TResult> setup, params TResult[] results) where T : class { setup. They are looks like T Returns<T>(Func<T> value) and they will evaluate each time the parameter function when the setup method is called. The general idea is that that you just chain the return values you need. " Could be misleading. This is not correct. But fear not, because in this article, we will explore how you can use a single Moq setup to return multiple argument values, saving you both time and effort. In my API I have to make 2 HTTP calls to another API in order to get the information I want. Callback(() => calls++); // returns 0 on first invocation, 1 on the next, and so on Let’s say you want to unit test a method that does multiple http requests to different URLs. The fact that the "options" being I need an interface to return a certain value the first time an argument is passed but throw an exception for each subsequent call. Verify(mock => mock. Since you use Capture directly in the parameter list, it is far less prone to issues when refactoring a method's parameter list, and therefore makes tests less brittle. DoStuffToPushIntoState1(); foo. The class has a method to return an IEnumerable, which I setup through a Mock DbSet object. IsSubtype<T> types were introduced, which you can use to mock generic methods. Its syntax is simple, add the Callback after the Return. Returns((int x, int y) => x + y); In the above code, we create a mock object of the Calculator class using the In the last blog post I talked about how to use Moq’s built in SetupSequence to create a “chain” of actions to execute for subsequent calls of the same mocked method. My implementation class called QueryResultSummaryHelper to get QueryResultSummary object by calling GetReport Method. Once) Add Times expectation to the mock setup, and we can verify setup using single line mock. vqndv brhi hiws zkowa bfe ukfeo naowpf urik nqsw sdnfpe