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Should you Unit Test Extension methods?
Keep your extension methods simple; they should not be complicated. Remember that the extension method cannot be mocked; unit tests for a class that is using it will test both this class logic and extension method’s logic. Do not create a new object inside extension methods.
How do you tests if two objects are equal in C#?
The most common way to compare objects in C# is to use the == operator. For predefined value types, the equality operator (==) returns true if the values of its operands are equal, false otherwise. For reference types other than string, == returns true if its two operands refer to the same object.
Which statement in a unit test testing framework verifies that two objects have the same values?
Equal() to test whether our actual object’s attributes are equal to our expected object’s attributes. We could override the default equality comparer for our class… however, this is a test code smell called Equality Pollution, falling under a larger umbrella (cloud – if you will…)
What is JavaScript unit testing?
JavaScript Unit Testing is a testing method in which JavaScript test code written for a web page or web application module is combined with HTML as an inline event handler and executed in the browser to test if all functionalities work fine. These unit tests are then organized in the test suite.
Can extension methods be mocked?
But how can we mock an extension method? You can create a non-static method on a class that implements an interface, mock the method on the interface, and then create a extension method that acts as a wrapper around either the original method or the mocked method.
Which of the following is a JUnit extension?
Cactus. Cactus is a simple test framework for unit testing server-side java code (Servlets, EJBs, Tag Libs, Filters). The intent of Cactus is to lower the cost of writing tests for server-side code. It uses JUnit and extends it.
What is unit testing C#?
Unit tests inform the developer when a change in one unit interferes with the functionality of another. Modern unit testing frameworks are typically implemented using the same code used by the system under test. This enables a developer who is writing application code in C# to write their unit tests in C# as well.
How to assert equality in a unit test?
W hen you start creating your first unit tests you are bound to encounter some situations in which you are trying to compare two values, an actual and an expected. All their properties have the exactly same content, however the Assert.Equal (or Assert.AreEqual if you are using NUnit) will simply not state that they are equal.
How to compare object instances in your unit tests quickly?
Depending on the depth of your object graph, you can either use FluentAssertions.ShouldBeEquivalentTo () implement your own equality assertions ( only within your test assembly, NOT your SUT ). With Fluent Assertions you get some nice configuration options and lots of additional assertion extension methods.
Can you roll your own equality assertion method?
If you can’t (or don’t want to) rely on an external extension to your testing framework, you can also roll your own equality assertion method via System.Reflection. This is from a Stack Overflow answer here:
When to use reference equality in C #?
Reference equality means that the object variables that are compared refer to the same object. If the current instance is a value type, the Equals (Object) method tests for value equality.