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Description

JUnit is a simple framework to write repeatable tests. It is a Java based framework and is an instance of the xUnit architecture for unit testing frameworks.

Support and updates

  • Junit has 5285 stars, 1199 forks.
  • It has 2 major releases in the past 6 months.
  • It has 2 commits and there are 17 open pull requests.
  • It has 144 open issues and 1792 have been closed.

Code statistics

  • Junit has 24 packages.
  • Junit has 186 classes and 706 methods.

Blogs

Check out the latest blogs from LambdaTest on this topic:

NUnit Tutorial: Parameterized Tests With Examples

This article is a part of our Content Hub. For more in-depth resources, check out our content hub on Selenium NUnit Tutorial.

8 Actionable Insights To Write Better Automation Code

As you start on with automation you may come across various approaches, techniques, framework and tools you may incorporate in your automation code. Sometimes such versatility leads to greater complexity in code than providing better flexibility or better means of resolving issues. While writing an automation code it’s important that we are able to clearly portray our objective of automation testing and how are we achieving it. Having said so it’s important to write ‘clean code’ to provide better maintainability and readability. Writing clean code is also not an easy cup of tea, you need to keep in mind a lot of best practices. The below topic highlights 8 silver lines one should acquire to write better automation code.

What I Learned While Moving From Waterfall To Agile Testing?

I still remember the day when our delivery manager announced that from the next phase, the project is going to be Agile. After attending some training and doing some online research, I realized that as a traditional tester, moving from Waterfall to agile testing team is one of the best learning experience to boost my career. Testing in Agile, there were certain challenges, my roles and responsibilities increased a lot, workplace demanded for a pace which was never seen before. Apart from helping me to learn automation tools as well as improving my domain and business knowledge, it helped me get close to the team and participate actively in product creation. Here I will be sharing everything I learned as a traditional tester moving from Waterfall to Agile.

How To Perform Automation Testing With Cucumber And Nightwatch JS?

This article is a part of our Content Hub. For more in-depth resources, check out our content hub on Selenium Cucumber Tutorial.

How To Create Data Driven Framework In Selenium

The efficiency of test automation largely depends on how well the ‘functionality under test’ is behaving against different input combinations. For instance, an email provider would have to verify different screens like login, sign-up, etc., by supplying different input values to the scenarios. However, the effort involved in maintaining the test code rises significantly with new functionalities in the web product.

JUnit Tutorial:

LambdaTest also has a detailed JUnit tutorial explaining its features, importance, advanced use cases, best practices, and more to help you get started with running your automation testing scripts.

JUnit Tutorial Chapters:

Here are the detailed JUnit testing chapters to help you get started:

  • Importance of Unit testing - Learn why Unit testing is essential during the development phase to identify bugs and errors.
  • Top Java Unit testing frameworks - Here are the upcoming JUnit automation testing frameworks that you can use in 2023 to boost your unit testing.
  • What is the JUnit framework
  • Why is JUnit testing important - Learn the importance and numerous benefits of using the JUnit testing framework.
  • Features of JUnit - Learn about the numerous features of JUnit and why developers prefer it.
  • JUnit 5 vs. JUnit 4: Differences - Here is a complete comparison between JUnit 5 and JUnit 4 testing frameworks.
  • Setting up the JUnit environment - Learn how to set up your JUnit testing environment.
  • Getting started with JUnit testing - After successfully setting up your JUnit environment, this chapter will help you get started with JUnit testing in no time.
  • Parallel testing with JUnit - Parallel Testing can be used to reduce test execution time and improve test efficiency. Learn how to perform parallel testing with JUnit.
  • Annotations in JUnit - When writing automation scripts with JUnit, we can use JUnit annotations to specify the type of methods in our test code. This helps us identify those methods when we run JUnit tests using Selenium WebDriver. Learn in detail what annotations are in JUnit.
  • Assertions in JUnit - Assertions are used to validate or test that the result of an action/functionality is the same as expected. Learn in detail what assertions are and how to use them while performing JUnit testing.
  • Parameterization in JUnit - Parameterized Test enables you to run the same automated test scripts with different variables. By collecting data on each method's test parameters, you can minimize time spent on writing tests. Learn how to use parameterization in JUnit.
  • Nested Tests In JUnit 5 - A nested class is a non-static class contained within another class in a hierarchical structure. It can share the state and setup of the outer class. Learn about nested annotations in JUnit 5 with examples.
  • Best practices for JUnit testing - Learn about the best practices, such as always testing key methods and classes, integrating JUnit tests with your build, and more to get the best possible results.
  • Advanced Use Cases for JUnit testing - Take a deep dive into the advanced use cases, such as how to run JUnit tests in Jupiter, how to use JUnit 5 Mockito for Unit testing, and more for JUnit testing.

JUnit Certification:

You can also check out our JUnit certification if you wish to take your career in Selenium automation testing with JUnit to the next level.

License

Junit is lincensed under the Other

LambdaTest Community Discussions

Questions
Discussion

How to Setup JUnit and Write Your First Test

What is the correct way to mock a final class with Mockito?

Sachin Ghuge | LambdaTest Certified 🎓

What is the best way to verify a method was called on an object created within a method using Mockito?

What is the difference between mockito-core and mockito-inline?

:question: Need help setting up your Java testing environment?

:eyes: Watch this video to learn how to get started with JUnit, install JDK & IntelliJ, and configure Maven for seamless testing! :rocket:

https://community.lambdatest.com/t/35731

StackOverFlow community discussions

Questions
Discussion

Mocking Logger and LoggerFactory with PowerMock and Mockito

Where do gradle unit tests for Google app engine expect persistence.xml?

JUnit: how to avoid "no runnable methods" in test utils classes

How to use stubs in JUnit and Java?

When a TrustManagerFactory is not a TrustManagerFactory (Java)

How to mock the HttpServletRequest?

Should the JUnit message state the condition of success or failure?

Junit test case for database insert method with DAO and web service

How to default the working directory for JUnit launch configurations in Eclipse?

JUnit Testing private variables?

EDIT 2020-09-21: Since 3.4.0, Mockito supports mocking static methods, API is still incubating and is likely to change, in particular around stubbing and verification. It requires the mockito-inline artifact. And you don't need to prepare the test or use any specific runner. All you need to do is :

@Test
public void name() {
    try (MockedStatic<LoggerFactory> integerMock = mockStatic(LoggerFactory.class)) {
        final Logger logger = mock(Logger.class);
        integerMock.when(() -> LoggerFactory.getLogger(any(Class.class))).thenReturn(logger);
        new Controller().log();
        verify(logger).warn(any());
    }
}

The two inportant aspect in this code, is that you need to scope when the static mock applies, i.e. within this try block. And you need to call the stubbing and verification api from the MockedStatic object.


@Mick, try to prepare the owner of the static field too, eg :

@PrepareForTest({GoodbyeController.class, LoggerFactory.class})

EDIT1 : I just crafted a small example. First the controller :

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class Controller {
    Logger logger = LoggerFactory.getLogger(Controller.class);

    public void log() { logger.warn("yup"); }
}

Then the test :

import org.junit.Test;
import org.junit.runner.RunWith;
import org.powermock.core.classloader.annotations.PrepareForTest;
import org.powermock.modules.junit4.PowerMockRunner;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import static org.mockito.Matchers.any;
import static org.mockito.Matchers.anyString;
import static org.mockito.Mockito.verify;
import static org.powermock.api.mockito.PowerMockito.mock;
import static org.powermock.api.mockito.PowerMockito.mockStatic;
import static org.powermock.api.mockito.PowerMockito.when;

@RunWith(PowerMockRunner.class)
@PrepareForTest({Controller.class, LoggerFactory.class})
public class ControllerTest {

    @Test
    public void name() throws Exception {
        mockStatic(LoggerFactory.class);
        Logger logger = mock(Logger.class);
        when(LoggerFactory.getLogger(any(Class.class))).thenReturn(logger);
        
        new Controller().log();
        
        verify(logger).warn(anyString());
    }
}

Note the imports ! Noteworthy libs in the classpath : Mockito, PowerMock, JUnit, logback-core, logback-clasic, slf4j


EDIT2 : As it seems to be a popular question, I'd like to point out that if these log messages are that important and require to be tested, i.e. they are feature / business part of the system then introducing a real dependency that make clear theses logs are features would be a so much better in the whole system design, instead of relying on static code of a standard and technical classes of a logger.

For this matter I would recommend to craft something like= a Reporter class with methods such as reportIncorrectUseOfYAndZForActionX or reportProgressStartedForActionX. This would have the benefit of making the feature visible for anyone reading the code. But it will also help to achieve tests, change the implementations details of this particular feature.

Hence you wouldn't need static mocking tools like PowerMock. In my opinion static code can be fine, but as soon as the test demands to verify or to mock static behavior it is necessary to refactor and introduce clear dependencies.

https://stackoverflow.com/questions/8948916/mocking-logger-and-loggerfactory-with-powermock-and-mockito

Test case code snippets

Database testing - Check data truncation

Description:

Check if input data is not truncated while saving. The field length shown to the user on the page and in the database schema should be the same.

General webpage functionality - Verify font style and formatting

Description:

Font size, style, and color for headline, description text, labels, infield data, and grid info should be standard as specified in SRS.

API Testing - Check custom header response

Description:

Verify that the API returns a response with a custom HTTP header when a specific request header is sent.

Accessibility testing - Meaningful source order for content

Description:

Ensure that the source order presents content meaningfully. When the page is viewed without styles, all content on the page should still appear in a meaningful and logical order.

Downloads

Junit can be downloaded from it’s GitHub repository - https://github.com/junit-team/junit5

Package and class index

org.junit.function

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Frameworks to try

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Active_mocker_ruby

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Gherkin-ruby

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Factory_bot_ruby

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FlaUI

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