Here’s what people are saying about Unit Testing

Popular Unit Testing Frameworks

Unit Testing for C#

NUnit 

Nunit falls under xUnit is a type of unit testing. XUnit is basically a collection of a number of unit testing frameworks. NUnit can be used for .NET files. Originally Nunit was ported from JUnit and the recent version is 3. This version has been designed in a new way to offer new features.

Unit Testing for Java

JUnit

JUnit is a type of unit testing used for Java that follows the concept of testing first and then coding. It is an open-source testing framework. The data is first tested as stated above and then put in the code. It gives an easy way of writing code.

TestNG

TestNG is used for Java Programming. It is similar to JUnit except there are some more functionalities that make it easier than JUnit and stronger.TestNG is capable of concurrent testing. It is an open-source framework that can do annotations too. The execution model used by TestNG is an important aspect of it too.

Unit Testing Framework for C and C++

Embunit

It is used for C and C++ languages. This unit testing tool can be used by both testers and developers. It is an open-source testing framework where source code used in the tests is automatically formed.

Unit Testing Framework for JavaScript

HtmlUnit

HtmlUnit is used for JavaScript. It is an open-source testing framework. Different GUI features like links, tables, forms can be obtained by it. The GUI-less browser in the Java library that is offered by HtmlUnit is used for Java Programs.

Unit Testing Best Practices

The best practices for Unit testing are:

• Unit tests should be easy to read and understand.
• The aim should be that the unit test can only fail if the code is broken and not in any other scenario. Thus the unit test must be trustworthy.
• Unit tests should verify and validate only a single use case. This makes the tests easy and more understandable. It is also recommended to use as few assertions as possible.
• The Unit Tests should not be dependent and should be able to run on any machine.
• The Unit tests should follow an automated process and the results should be accessible and reviewed all in the team.

Advantages and Disadvantages of Unit Testing

Advantages

• It helps in building confidence about changing or in maintenance of code.
• The codes are less dependent on each other because of unit testing therefore if changes take place the impact on the overall code is less.
• With the use of unit testing the codes become more reusable.
• If a bug is found while doing unit testing the cost of  fixing it is lesser compared to when found in other levels.
• The process of debugging is comparatively easier.

Disadvantages

• Writing a good unit test is time-consuming and difficult.
• Because of the above reason the tester or the software developer can make errors putting the whole system in jeopardy.
• Sometimes errors cannot be found. This is because in unit testing the modules are tested away from each other and then clubbed.
• Integration and system errors might go unnoticed.

What is unit testing?

Unit testing is used to check how correct a particular code is. The unit part of the function or code in the application is tested in the process.

What are the different techniques of Unit Testing?

The different types of unit testing are:

• Black Box Testing
• White Box Testing
• Gray Box Testing

What are some of the popular unit testing frameworks?

The different unit testing tools are:

• NUnit
• JUnit
• TestNG
• Mockito
• PHPUnit

How Unit Testing is done?

In the coding phase or development phase, unit testing is usually conducted. The tests are done by separating a part of the code and running the tests on it. This separated part may be a method or an object or a module depending on the situation.