An Ultimate Guide For Successful Unit Testing To Boost Your Business Growth in 2021

 

Today, software testing is carried out in many procedures. Mostly, organizations strive to create the best products before it reaches the end-user. In this timeframe, the testing phrase comes into play depending on your requirement specific tests are considered to run on new software for identifying any bugs and errors in the modules.

Do you know? there are four different levels where software testing is performed:

1.     Unit Testing

2.     Integration Testing

3.     System Testing

4.     Acceptance Testing

 What is Unit Testing?

Unit testing is a software testing process in which components of the software are tested. The mission of this testing is to validate each component of the software code as we expected. Unit testing is also known as component testing and it’s performed during the coding phase of an application by the developers right before the integration testing.  

What’s Unique About Unit Testing?

Unit testing helps developers to uncover what type of functionality is offered by a unit along with getting to understand how the API responds. Further, it lets the programmers refine the code properly

·       It helps to fix the bugs and reduces costs

·       Allows developers to make changes in the testing code

·       Executing in-depth unit tests serve as a project documentation

You can re-use the code and even migrate to a whole new project along with the previous test reports

 

Wondering How Does Unit Tests Look Like?

The unit code could be anything whether it’s a line of code, class, or method. In general, smaller tests gives an edge over their granular view of how that particular is performing. One of the key aspects of testing the small units results in unlocking the lightning speed where you can do thousands of tests in a fraction of a second. 

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 Insights of the sample code:

def divider (a, b)

  return a/b

end

By Using Ruby, those small tests similarly look like this:

 

class smallTest < MiniTest::Unit::testCase

  def tiny_test

     @a=10

     @b=2

     assert_equal(2, divider(a, b))

  end

end

 

Why Do We Need Unit Testing?

Unit testing increases the speed of testing. It enables to make changes in the code. However, writing test cases take a lot of time. Which it comes to unit testing, it is more reliable and the development process is faster. After running the test, if a test fails then only the newest changes need to be debugged.

 

Benefits of Unit Testing

·       Makes the coding process more Agile

·       Revamp the quality of the code

·       Finds issues right at the early stages

·       Reduces defects in the newly developed features

·       Provides documentation of the system (API)

·       Helps in debugging the process

·       Saves time and money

·       Increases performance

·       Reduces code complexity

 

Techniques of Unit Testing 

Black Box Testing – In black box testing, the functionality of the apps is deeply tested even without having the coding knowledge.  Mostly, it focuses on the input and output of the software application. This black box testing is also called behavioral testing.

White Box Testing –  In white box testing, the internal structure, design, and code of the software are tested. Even the code is visible to the testers. This white box testing is also called as open box testing or glass testing.

Gray Box Testing - It is a software testing process in which the apps or products are tested by professionals who have enough knowledge of the internal structure of the software application. This type of testing drastically increases the test coverage and detects several bugs in the software testing.

Best Unit Testing Frameworks

NUnit – It is a tool that allows writing test scripts manually.

JMockit – Supports 3 types of code coverage.

Emma – An open-source toolkit that measures Java code coverage.

Quilt HTTP – A free cross-platform Java software development tool.

HtmlUnit – An open-source java library that supports JavaScript.

Embunit – It’s a tool designed for developers and testers.

SimpleTest – A PHP programming language that supports SSL, forms, and proxies.

ABAP Unit – Performs both automatically and manually unit testing.

Typemock – A free tool that reduces time consumption for fixing bugs.

LDRA – Performs starts to end-to-end quality checks.

Microsoft unit testing framework – Supports data-driven testing with a group of elements 

 

Best Practices of Unit Tests

1.     Run tests as fast as possible

2.     Keep tests with low cyclomatic complexity

3.     Prevent duplicate implementation logic

4.     Tests must be readable

5.     Representing the same behavior if no changes were made to the code

6.     Use test doubles

7.     Tests should have the names which reflect the whole scenario

8.     Never couple the tests with implementation details

Conclusion  

Unit testing plays an indispensable role in the process of software testing. In earlier times, it’s a task that is performed manually by the developers and testers. Due to the advancements in the software industry, every task has been automated by using the latest testing tools. In unit testing, rigorous discipline, consistency are required throughout the entire process of software development. Further, it saves a lot of time and upfront costs.

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