FluentAssertions provides a fluent interface (hence the 'fluent' in the name), allowing you chain method calls together. Box 5076 Champaign, IL 61825-5076 Website: www.HumanKinetics.com In the United States, email info@hkusa.com or call 800-747-4457. You can also perform assertions on multiple methods or properties in a certain type by using the Methods() or Properties() extension methods and some optional filtering methods. Performed invocations: SomeInheritedOrDirectlyDecoratedAttribute, "because this is required to intercept exceptions", "because all Actions with HttpPost require ValidateAntiForgeryToken", "all the return types should be immutable". Well, fluent API means that the library relies on method chaining. The main point to keep in mind is that your mocks have to be strict mocks for the order of calls to be important; using the default Loose . In this article, Ill show a few examples of how FluentAssertions can improve unit tests by comparing it with the built-in assertions (from Microsoft.VisualStudio.TestTools.UnitTesting). Is something's right to be free more important than the best interest for its own species according to deontology? Fluent Assertions is a library for asserting that a C# object is in a specific state. It contains methods for dealing with Task in the style of Fluent Assertions, cutting down on boilerplate and improving readability. Added ForConstraint method to AssertionScope that allows you to use an OccurrenceConstraint in your custom assertion extensions that can verify a number against a constraint, e.g. Multiple asserts . Better support for a common verification scenario: a single call with complex arguments. We have added a number of assertions on types and on methods and properties of types. Could there be a way to extend Verify to perform more complex assertions and report on failures more clearly? When working in applications you might often find that the source code has become so complex that it is difficult to understand and maintain. This method can screw you over. If this method fails (e.g. Overloading a property based on accessibility isn't actually possible (except through explicit interface implementation, but that's not an option), so we might have to juggle some things around. Fluent Assertions is a library for asserting that a C# object is in a specific state. Pretty simple syntax. As a result, everyone can easier read and understand unit tests, making it easier to locate the failing assert. No setups configured. Ill have more to say about fluent interfaces and method chaining in a future post here. Does Cast a Spell make you a spellcaster? Even though callbacks in Moq isnt ment to fix this, it solves the problem quite well. to verify if all side effects are triggered. As a result, they increase the quality of your codebase, and they reduce the risk of introducing bugs. As usual, it is highly recommended to implement automa ted tests for verifying these services, for instance, by using REST Assured.REST Assured is a popular open source (Apache 2.0 license) Java library for testing REST services. but "Benes" differs near "Bennes" (index 0). NUnit tracks the count of assertions for each test. Ill compare the failure messages below. YTA. Exception thrown at point of dispose contains: For more information take a look at the AssertionScopeSpecs.cs in Unit Tests. So, whatever the object you are asserting, all methods are available. These extension methods read like sentences. IEnumerable1 and all items in the collection are structurally equal. Moq provides a way to do this using MockSequence. There are so many possibilities and specialized methods that none of these examples do them good. This chaining can make your unit tests a lot easier to read. rev2023.3.1.43269. Looking at the existing thread-safety code, there doesn't seem to be a way to get access to anything other than a snapshot of the current invocation collection. The main advantage of using Fluent Assertions is that your unit tests will be more readable and less error-prone. The open-source game engine youve been waiting for: Godot (Ep. It gives you a guarantee that your code works up to specification and provides fast automated regression for refactorings and changes to the code. Thread-safety: Should user code receive a reference to the actual invocations collection, or a snapshot / copy of the actual invocations, whenever Mock.Invocations is queried? The extension methods for checking date and time variables is where fluent API really shines. Fluent Assertions will automatically find the corresponding assembly and use it for throwing the framework-specific exceptions. We want to check if an integer is equal to 5: You can also include an additional message to the Be method: When the above assert fails, the following error message will be displayed in the Test output window: A little bit of additional information for the error message parameter: A formatted phrase as is supported by System.String.Format(System.String,System.Object[]) explaining why the assertion is needed. Type, Method, and Property assertions - Fluent Assertions A very extensive set of extension methods that allow you to more naturally specify the expected outcome of a TDD or BDD-style unit tests. The goal of fluent interfaces is to make the code simple, readable, and maintainable. By Joydip Kanjilal, Ideally, youd be able to understand why a test failed just by looking at the failure message and then quickly fix the problem. I mentioned this to @kzu, and he was suggesting that you migrate to Moq 5, which offers much better introspection into a mock's state and already includes the possibility to look at all invocations that have occurred on a mock. Moq provides a way to do this using MockSequence. This is meant to maximize code readability. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. : an exception is thrown) then you know something went wrong and you can start digging. The two most common forms of assertion are : MustHaveHappened () (no arguments) asserts that the call was made 1 or more times, and A Shouldly assertion framework is a tool used for verifying the behavior of applications. Asking for help, clarification, or responding to other answers. They already deal with the pain of walking through an object graph and dealing with the dangers of cyclic references, etc, and give you control to exclude/include properties, whether ordering matters in collections and other nuanced details of object comparisons. Better support for a common verification scenario: a single call with complex arguments. If, for some unknown reason, Fluent Assertions fails to find the assembly, and youre running under .NET 4.7 or a .NET Core 3.0 project, try specifying the framework explicitly using a configuration setting in the projects app.config. Fluent Assertions supports a lot of different unit testing frameworks. Making a "fluent assertion" on something will automatically integrate with your test framework, registering a failed test if something doesn't quite match. You can find more information about Fluent Assertions in the official documentation. Is it possible to pass number of times invocation is met as parameter to a unit test class method? 5 Secret Steps To Improve Your Code Quality. Occasional writer. . When mocking a service interface, I want to make assertions that a method on the interface was called with a given set of arguments. When I'm not glued to my computer screen, I like to spend time with my wife and two kids. Object. If you are a developer, then you know that the most important job is to create software that meets business needs.But to have the most success, the software also needs to be of high quality. Like this: You can also perform assertions on all of methods return types to check class contract. Expected member Property4 to be "pt@gmail.com", but found . I'm going to keep referring to Fluent Assertions (because they really do seem to have a firm grasp of what's really involved in scenario-based testing) where their model uses a configuration object to customise how the comparison of complex types is made. warning? Moq and Fluent Assertions can be categorized as "Testing Frameworks" tools. Well use this project in the subsequent sections of this article. Has 90% of ice around Antarctica disappeared in less than a decade? Note that because the return type of Save is void, the method chain shown in the preceding code snippet ends there. Perhaps it's best to think about redesign InvocationCollection first to a cleaner, more solid design that adheres to the usual .NET collection patterns better; perhaps then it would be ready to be exposed without an additional interface. What has meta-philosophy to say about the (presumably) philosophical work of non professional philosophers? The contract defined by Invocation is that the Return methods should ensure that these get properly written back for the calling code. One of the best instructional methods to serve various technology-enhanced learning activities was Project-Based Learning. I feel like I want to write extension methods: But right now the information is internal, so I need to have some Setup calls to capture the arguments for myself. Fluent Assertions vs Shouldly: which one should you use? Select the console application project we created above in the Solution Explorer window and create a new class called OrderBL. What are some alternatives to Fluent Assertions? Expected person.Name to be "benes", but "Benes" differs near "Bennes" (index 0). In order to use AssertJ, you need to include the following section in your pom.xml file: This dependency covers only the basic Java assertions. You should now specify return this; from these participating methods. You're saying that Moq's verification error messages are less helpful than they could be, which becomes apparent when they're contrasted with Fluent Assertions' messages. Fluent interfaces and method chaining are two concepts that attempt to make your code readable and simple. The above will batch the two failures, and throw an exception at the point of disposing the AssertionScope displaying both errors. ), (It just dawned on me that you're probably referring to the problem where verifying argument values with Verify comes too late because the argument's type is a reference type, and Moq does not actually capture the precise state of the reference type at the moment when an invocation is happening. How do I verify a method was called exactly once with Moq? The following code snippet illustrates how methods are chained. There are many generic matchers like toEqual, toContain, toBeTruthy that can be used to assert any conditions. You can write your custom assertions that validate your custom classes and fail if the condition fails. Fluent assertions are an example of a fluent interface, a design practice that has become popular in the last two decades. One neat feature is the ability to chain a specific assertion on top of an assertion that acts on a collection or graph of objects. I cannot judge whether migration to Moq 5 would actually be feasible for you, since I don't know the exact release date for Moq 5, nor whether it will be sufficiently feature-complete to cover your usage scenarios. The following test uses the built-in assertions to check if the two references are pointing to the same object: Compare this with the FluentAssertions equivalent using Should().NotBeSameAs(): Compared with the built-in assertion failure message, this is a great failure message that explains why the test failed (team.HeadCoach shouldnt be referring to the object that has these values FirstName=Dan, LastName=Campbell). Both strategies then raise the question: how much of the Invocation type should be made public? So I hope you don't mind if I close this issue as well (but I'll tag it as "unresolved"). This makes your test code much cleaner and easier to read. It provides a fluent API for testing and validating REST services. Not the answer you're looking for? Windows store for Windows 8. This article presented a small subset of functionality. The unit test stopped once the first assert failed. Perhaps I'm overthinking this. Its quite common to have classes with the same properties. The get method makes a GET request into the application, while the assertStatus method asserts that the returned response should have the given HTTP status code. You can assert methods or properties from all types in an assembly that apply to certain filters, like this: Alternatively you can use this more fluent syntax instead. Method chaining is a technique in which methods are called on a sequence to form a chain and each of these methods return an instance of a class. 1. using FluentAssertions; Let's write some basic unit tests to become comfortable with FluentAssertions. Fluent Assertions are important in unit testing because they allow the code to be easily read and followed. This same test with fluent assertions would look like this: The chaining of the Should and Be methods represents a fluent interface. It is a type of method chaining in which the context is maintained using a chain. In contrast to not using them, where you have to re-execute the same test over and over again until all assertions are fixed. (Something similar has been previously discussed in #84.) Fluent assertions make your tests more readable and easier to maintain. You can batch multiple assertions into an AssertionScope so that FluentAssertions throws one exception at the end of the scope with all failures. But when tests are taken a little bit longer to run, e.g. Moq Namespace. All that is required to do is get the expected outcome of the test in a result then use the should () assertion and other extensions to test the use case. (Please take the discussion in #84 into consideration.). Consider this code that moves a noticeId from one list to another within a Unit of Work: In testing this, it is important we can verify that the calls remain in the correct order. The coding of Kentor.AuthServices was a perfect opportunity for me to do some . His early life habits were resumedhis early rising, his frugal breakfast, his ride over his estate, and his exact method in everything. Also, you dont have to override Equals(object o) to get this functionality. as in example? As a developer, I have acquired a wealth of experience and knowledge in C#, software architecture, unit testing, DevOps, and Azure. The most minimal, but still feasible API when we want to focus on Verify without blowing up the Setup stage might look like this: // Arrange: var a = new Mock < IFoo > (); var b = new Mock < IFoo > (); var seq = MockSequence. With Assertion Scopes provided by the FluentAssertions library, we can group multiple assertions into a single "transaction". If we perform the same test using Fluent Assertions library, the code will look something like this: Like this: If you also want to assert that an attribute has a specific property value, use this syntax. link to Integration Testing: Who's in Charge? Example of a REST service REST Assured REST APIs are ubiquitous. This has the benefit that when a test fails, you are immediately presented with the bigger picture. Whether you are a new or experienced developer, with these few tricks, you will confidently improve your code quality. The resolution seems to be "wait for Moq 5". Verify(Action) ? The library is test runner agnostic, meaning that it can be used with MSTest, XUnit, NUnit, and others. Thats why we are creating an extension method that takes StringAssertions as a parameter. Of course, this test fails because the expected names are not correct. Was the method call at all? You'd need to consider all these things when producing a diagnostic message (and probably some more), so a message might easily get really long and far too detailed, which would again be unhelpful. If you have never heard of FluentAssertions, it's a library that, as the name entails, lets you write test assertions with a fluent API instead of using the methods that are available on Assert. Notice that actual behavior is determined by the global defaults managed by FluentAssertions.AssertionOptions. I enjoy working on complex systems that require creative solutions. to your account. An invoked method can also have multiple parameters. Copyright 2023 IDG Communications, Inc. How to use named and optional parameters in C#, Sponsored item title goes here as designed, How to benchmark C# code using BenchmarkDotNet, How to use const, readonly, and static in C#, When to use an abstract class vs. interface in C#, How to work with Action, Func, and Predicate delegates in C#, How to implement the repository design pattern in C#, How to build your own task scheduler in C#, Exploring virtual and abstract methods in C#, How to use the flyweight design pattern in C#, How to choose a low-code development platform. In method chaining, the methods may return instances of any class. For information about Human Kinetics' coverage in other areas of the world, please visit our website: www.HumanKinetics.com . Assert.AreNotSame(team.HeadCoach, copy.HeadCoach); team.HeadCoach.Should().NotBeSameAs(copy.HeadCoach); Assert.AreEqual(team.HeadCoach.FirstName, copy.HeadCoach.FirstName); Assert.AreEqual(team.HeadCoach.LastName, copy.HeadCoach.LastName); team.HeadCoach.Should().BeEquivalentTo(copy.HeadCoach); copy.FirstName.Should().Be(player.FirstName); DeepCopyTest_ValuesAreCopied_ButReferencesArentCopied. The Return methods could be marked internal and the Arguments property changed to IReadOnlyList
FluentAssertions provides a fluent interface (hence the 'fluent' in the name), allowing you chain method calls together. Box 5076 Champaign, IL 61825-5076 Website: www.HumanKinetics.com In the United States, email info@hkusa.com or call 800-747-4457. You can also perform assertions on multiple methods or properties in a certain type by using the Methods() or Properties() extension methods and some optional filtering methods. Performed invocations: SomeInheritedOrDirectlyDecoratedAttribute, "because this is required to intercept exceptions", "because all Actions with HttpPost require ValidateAntiForgeryToken", "all the return types should be immutable". Well, fluent API means that the library relies on method chaining. The main point to keep in mind is that your mocks have to be strict mocks for the order of calls to be important; using the default Loose . In this article, Ill show a few examples of how FluentAssertions can improve unit tests by comparing it with the built-in assertions (from Microsoft.VisualStudio.TestTools.UnitTesting). Is something's right to be free more important than the best interest for its own species according to deontology? Fluent Assertions is a library for asserting that a C# object is in a specific state. It contains methods for dealing with Task in the style of Fluent Assertions, cutting down on boilerplate and improving readability. Added ForConstraint method to AssertionScope that allows you to use an OccurrenceConstraint in your custom assertion extensions that can verify a number against a constraint, e.g. Multiple asserts . Better support for a common verification scenario: a single call with complex arguments. We have added a number of assertions on types and on methods and properties of types. Could there be a way to extend Verify to perform more complex assertions and report on failures more clearly? When working in applications you might often find that the source code has become so complex that it is difficult to understand and maintain. This method can screw you over. If this method fails (e.g. Overloading a property based on accessibility isn't actually possible (except through explicit interface implementation, but that's not an option), so we might have to juggle some things around. Fluent Assertions is a library for asserting that a C# object is in a specific state. Pretty simple syntax. As a result, everyone can easier read and understand unit tests, making it easier to locate the failing assert. No setups configured. Ill have more to say about fluent interfaces and method chaining in a future post here. Does Cast a Spell make you a spellcaster? Even though callbacks in Moq isnt ment to fix this, it solves the problem quite well. to verify if all side effects are triggered. As a result, they increase the quality of your codebase, and they reduce the risk of introducing bugs. As usual, it is highly recommended to implement automa ted tests for verifying these services, for instance, by using REST Assured.REST Assured is a popular open source (Apache 2.0 license) Java library for testing REST services. but "Benes" differs near "Bennes" (index 0). NUnit tracks the count of assertions for each test. Ill compare the failure messages below. YTA. Exception thrown at point of dispose contains: For more information take a look at the AssertionScopeSpecs.cs in Unit Tests. So, whatever the object you are asserting, all methods are available. These extension methods read like sentences. IEnumerable1 and all items in the collection are structurally equal. Moq provides a way to do this using MockSequence. There are so many possibilities and specialized methods that none of these examples do them good. This chaining can make your unit tests a lot easier to read. rev2023.3.1.43269. Looking at the existing thread-safety code, there doesn't seem to be a way to get access to anything other than a snapshot of the current invocation collection. The main advantage of using Fluent Assertions is that your unit tests will be more readable and less error-prone. The open-source game engine youve been waiting for: Godot (Ep. It gives you a guarantee that your code works up to specification and provides fast automated regression for refactorings and changes to the code. Thread-safety: Should user code receive a reference to the actual invocations collection, or a snapshot / copy of the actual invocations, whenever Mock.Invocations is queried? The extension methods for checking date and time variables is where fluent API really shines. Fluent Assertions will automatically find the corresponding assembly and use it for throwing the framework-specific exceptions. We want to check if an integer is equal to 5: You can also include an additional message to the Be method: When the above assert fails, the following error message will be displayed in the Test output window: A little bit of additional information for the error message parameter: A formatted phrase as is supported by System.String.Format(System.String,System.Object[]) explaining why the assertion is needed. Type, Method, and Property assertions - Fluent Assertions A very extensive set of extension methods that allow you to more naturally specify the expected outcome of a TDD or BDD-style unit tests. The goal of fluent interfaces is to make the code simple, readable, and maintainable. By Joydip Kanjilal, Ideally, youd be able to understand why a test failed just by looking at the failure message and then quickly fix the problem. I mentioned this to @kzu, and he was suggesting that you migrate to Moq 5, which offers much better introspection into a mock's state and already includes the possibility to look at all invocations that have occurred on a mock. Moq provides a way to do this using MockSequence. This is meant to maximize code readability. 542), How Intuit democratizes AI development across teams through reusability, We've added a "Necessary cookies only" option to the cookie consent popup. : an exception is thrown) then you know something went wrong and you can start digging. The two most common forms of assertion are : MustHaveHappened () (no arguments) asserts that the call was made 1 or more times, and A Shouldly assertion framework is a tool used for verifying the behavior of applications. Asking for help, clarification, or responding to other answers. They already deal with the pain of walking through an object graph and dealing with the dangers of cyclic references, etc, and give you control to exclude/include properties, whether ordering matters in collections and other nuanced details of object comparisons. Better support for a common verification scenario: a single call with complex arguments. If, for some unknown reason, Fluent Assertions fails to find the assembly, and youre running under .NET 4.7 or a .NET Core 3.0 project, try specifying the framework explicitly using a configuration setting in the projects app.config. Fluent Assertions supports a lot of different unit testing frameworks. Making a "fluent assertion" on something will automatically integrate with your test framework, registering a failed test if something doesn't quite match. You can find more information about Fluent Assertions in the official documentation. Is it possible to pass number of times invocation is met as parameter to a unit test class method? 5 Secret Steps To Improve Your Code Quality. Occasional writer. . When mocking a service interface, I want to make assertions that a method on the interface was called with a given set of arguments. When I'm not glued to my computer screen, I like to spend time with my wife and two kids. Object. If you are a developer, then you know that the most important job is to create software that meets business needs.But to have the most success, the software also needs to be of high quality. Like this: You can also perform assertions on all of methods return types to check class contract. Expected member Property4 to be "pt@gmail.com", but found . I'm going to keep referring to Fluent Assertions (because they really do seem to have a firm grasp of what's really involved in scenario-based testing) where their model uses a configuration object to customise how the comparison of complex types is made. warning? Moq and Fluent Assertions can be categorized as "Testing Frameworks" tools. Well use this project in the subsequent sections of this article. Has 90% of ice around Antarctica disappeared in less than a decade? Note that because the return type of Save is void, the method chain shown in the preceding code snippet ends there. Perhaps it's best to think about redesign InvocationCollection first to a cleaner, more solid design that adheres to the usual .NET collection patterns better; perhaps then it would be ready to be exposed without an additional interface. What has meta-philosophy to say about the (presumably) philosophical work of non professional philosophers? The contract defined by Invocation is that the Return methods should ensure that these get properly written back for the calling code. One of the best instructional methods to serve various technology-enhanced learning activities was Project-Based Learning. I feel like I want to write extension methods: But right now the information is internal, so I need to have some Setup calls to capture the arguments for myself. Fluent Assertions vs Shouldly: which one should you use? Select the console application project we created above in the Solution Explorer window and create a new class called OrderBL. What are some alternatives to Fluent Assertions? Expected person.Name to be "benes", but "Benes" differs near "Bennes" (index 0). In order to use AssertJ, you need to include the following section in your pom.xml file: This dependency covers only the basic Java assertions. You should now specify return this; from these participating methods. You're saying that Moq's verification error messages are less helpful than they could be, which becomes apparent when they're contrasted with Fluent Assertions' messages. Fluent interfaces and method chaining are two concepts that attempt to make your code readable and simple. The above will batch the two failures, and throw an exception at the point of disposing the AssertionScope displaying both errors. ), (It just dawned on me that you're probably referring to the problem where verifying argument values with Verify comes too late because the argument's type is a reference type, and Moq does not actually capture the precise state of the reference type at the moment when an invocation is happening. How do I verify a method was called exactly once with Moq? The following code snippet illustrates how methods are chained. There are many generic matchers like toEqual, toContain, toBeTruthy that can be used to assert any conditions. You can write your custom assertions that validate your custom classes and fail if the condition fails. Fluent assertions are an example of a fluent interface, a design practice that has become popular in the last two decades. One neat feature is the ability to chain a specific assertion on top of an assertion that acts on a collection or graph of objects. I cannot judge whether migration to Moq 5 would actually be feasible for you, since I don't know the exact release date for Moq 5, nor whether it will be sufficiently feature-complete to cover your usage scenarios. The following test uses the built-in assertions to check if the two references are pointing to the same object: Compare this with the FluentAssertions equivalent using Should().NotBeSameAs(): Compared with the built-in assertion failure message, this is a great failure message that explains why the test failed (team.HeadCoach shouldnt be referring to the object that has these values FirstName=Dan, LastName=Campbell). Both strategies then raise the question: how much of the Invocation type should be made public? So I hope you don't mind if I close this issue as well (but I'll tag it as "unresolved"). This makes your test code much cleaner and easier to read. It provides a fluent API for testing and validating REST services. Not the answer you're looking for? Windows store for Windows 8. This article presented a small subset of functionality. The unit test stopped once the first assert failed. Perhaps I'm overthinking this. Its quite common to have classes with the same properties. The get method makes a GET request into the application, while the assertStatus method asserts that the returned response should have the given HTTP status code. You can assert methods or properties from all types in an assembly that apply to certain filters, like this: Alternatively you can use this more fluent syntax instead. Method chaining is a technique in which methods are called on a sequence to form a chain and each of these methods return an instance of a class. 1. using FluentAssertions; Let's write some basic unit tests to become comfortable with FluentAssertions. Fluent Assertions are important in unit testing because they allow the code to be easily read and followed. This same test with fluent assertions would look like this: The chaining of the Should and Be methods represents a fluent interface. It is a type of method chaining in which the context is maintained using a chain. In contrast to not using them, where you have to re-execute the same test over and over again until all assertions are fixed. (Something similar has been previously discussed in #84.) Fluent assertions make your tests more readable and easier to maintain. You can batch multiple assertions into an AssertionScope so that FluentAssertions throws one exception at the end of the scope with all failures. But when tests are taken a little bit longer to run, e.g. Moq Namespace. All that is required to do is get the expected outcome of the test in a result then use the should () assertion and other extensions to test the use case. (Please take the discussion in #84 into consideration.). Consider this code that moves a noticeId from one list to another within a Unit of Work: In testing this, it is important we can verify that the calls remain in the correct order. The coding of Kentor.AuthServices was a perfect opportunity for me to do some . His early life habits were resumedhis early rising, his frugal breakfast, his ride over his estate, and his exact method in everything. Also, you dont have to override Equals(object o) to get this functionality. as in example? As a developer, I have acquired a wealth of experience and knowledge in C#, software architecture, unit testing, DevOps, and Azure. The most minimal, but still feasible API when we want to focus on Verify without blowing up the Setup stage might look like this: // Arrange: var a = new Mock < IFoo > (); var b = new Mock < IFoo > (); var seq = MockSequence. With Assertion Scopes provided by the FluentAssertions library, we can group multiple assertions into a single "transaction". If we perform the same test using Fluent Assertions library, the code will look something like this: Like this: If you also want to assert that an attribute has a specific property value, use this syntax. link to Integration Testing: Who's in Charge? Example of a REST service REST Assured REST APIs are ubiquitous. This has the benefit that when a test fails, you are immediately presented with the bigger picture. Whether you are a new or experienced developer, with these few tricks, you will confidently improve your code quality. The resolution seems to be "wait for Moq 5". Verify(Action) ? The library is test runner agnostic, meaning that it can be used with MSTest, XUnit, NUnit, and others. Thats why we are creating an extension method that takes StringAssertions as a parameter. Of course, this test fails because the expected names are not correct. Was the method call at all? You'd need to consider all these things when producing a diagnostic message (and probably some more), so a message might easily get really long and far too detailed, which would again be unhelpful. If you have never heard of FluentAssertions, it's a library that, as the name entails, lets you write test assertions with a fluent API instead of using the methods that are available on Assert. Notice that actual behavior is determined by the global defaults managed by FluentAssertions.AssertionOptions. I enjoy working on complex systems that require creative solutions. to your account. An invoked method can also have multiple parameters. Copyright 2023 IDG Communications, Inc. How to use named and optional parameters in C#, Sponsored item title goes here as designed, How to benchmark C# code using BenchmarkDotNet, How to use const, readonly, and static in C#, When to use an abstract class vs. interface in C#, How to work with Action, Func, and Predicate delegates in C#, How to implement the repository design pattern in C#, How to build your own task scheduler in C#, Exploring virtual and abstract methods in C#, How to use the flyweight design pattern in C#, How to choose a low-code development platform. In method chaining, the methods may return instances of any class. For information about Human Kinetics' coverage in other areas of the world, please visit our website: www.HumanKinetics.com . Assert.AreNotSame(team.HeadCoach, copy.HeadCoach); team.HeadCoach.Should().NotBeSameAs(copy.HeadCoach); Assert.AreEqual(team.HeadCoach.FirstName, copy.HeadCoach.FirstName); Assert.AreEqual(team.HeadCoach.LastName, copy.HeadCoach.LastName); team.HeadCoach.Should().BeEquivalentTo(copy.HeadCoach); copy.FirstName.Should().Be(player.FirstName); DeepCopyTest_ValuesAreCopied_ButReferencesArentCopied. The Return methods could be marked internal and the Arguments property changed to IReadOnlyList
