In Eclipse, the JUnit view nicely visualizes execution status and results of JUnit tests. JUnit tests usually are Java classes with test methods or Java classes annotated with @SuiteClasses, which compose multiple other test classes or suites.
But JUnit is more powerful than that. It allows you to implement custom test runners. Those test runners are responsible for creating a tree structure of test descriptions. Later the runner needs to execute all leafs of that tree as test cases.
A node in this tree of tests is not necessarily backed by a Java class, as it is for test suites. It can be something purely virtual. JUnit itself ships with a test runner for which this is true: org.junit.runners.Parameterized.

The screenshots above shows a Parameterized test on the left-hand-side and the Eclipse JUnit View (after the test has been executed) on the right-hand-side. The method parameters() returns a list of test data sets and the Parameterized runner will call the constructor of this test class for each data set. Consequently, the number of constructor parameters must match the number of items in each data set. For each data set, all test methods are executed and what we get, effectively, is a matrix test.
In the screenshot of the JUnit view we can see how the Parameterized runner presents the test matrix as a tree: The test class itself is the root node, every data set is a subtree and every entry of the test matrix is a leaf.
As of now (Eclipse Mars M4), it is possible to run individual subtrees by choosing "run" from the context menu. This effectively means to execute a row from the test matrix.

Additionally, it is now possible to run a single column from the test matrix by running a single method from a Parameterized test.

Note that in the picture on the left-hand-side I'm explicitly clicking on the method's name. Clicking elsewhere would execute all test methods from the class.
The new mechanism to filter down test description trees can achieve this without being specific to the JUnit's Parameterized runner: The filter first extracts the leading part of the test desription's name which is a valid Java identifier. The test is executed if this leading part exists and if it equals the to-be-executed method's name.
I would like to thank NumberFour for having me implement this fix specifically for Xpect. Gratitude also goes to itemis, my employer, who gave me the time to generalize and contribute the fix to Eclipse JDT. Also I would like to thank the JDT team for accepting the contribution.
235 comments:
«Oldest ‹Older 201 – 235 of 235Splitting string in c++
Splitting string in c++ involves breaking a single string into smaller parts, typically based on a delimiter. This is useful when parsing text or processing input data. While C++ doesn't provide a built-in function for splitting strings, you can achieve this by using various techniques, such as using streams, iterating over the string, or utilizing functions from the Standard Library like find() and substr(). Efficient string splitting is important for tasks like tokenization and data processing in C++ applications.
String compareto
String compareto is a method used to compare two strings in programming languages like Java and C#. It compares the strings lexicographically, meaning it checks their alphabetical order based on Unicode values of characters. The result of **compareTo** helps determine if one string is greater, smaller, or equal to another. This method returns a value indicating the difference, where a positive value indicates the first string is lexicographically greater, a negative value indicates it's smaller, and zero means both strings are equal.
Efficiently Calculate Standard Deviation with NumPy
"Master the art of standard deviation with NumPy, a powerful library for numerical computations in Python. This guide walks you through the process of efficiently calculating standard deviation, with clear explanations, code examples, and best practices for handling large datasets. Whether you're a beginner or an experienced data analyst, you'll learn how to leverage NumPy’s built-in functions to streamline your statistical analysis and improve performance in your data-driven projects."
Why Every Developer Should Understand JavaScript Compilers
Understanding JavaScript compilers is crucial for developers to write efficient, high-performance code. They optimize JavaScript by transforming and enhancing it for better execution in modern engines. This knowledge helps developers debug effectively, leverage advanced features, and improve application speed. Mastering compilers empowers you to write cleaner, faster, and more scalable code.
Online Python Compiler
An online python compiler is a web-based tool that allows users to write, run, and test Python code instantly without installing any software. It’s ideal for beginners, students, and developers to experiment with code, debug, or practice programming from any device with internet access. Most compilers also support syntax highlighting and output display in real time.
Quick Python Testing with an Online Compiler
Need to test Python code fast? Quick Python Testing with an Online Compiler makes it easy to run, debug, and experiment with Python code directly in your browser—no installations or setup required. Whether you're learning, prototyping, or just fixing a bug, an online Python compiler offers a fast and hassle-free way to get results instantly. Perfect for beginners and pros alike, it’s the simplest way to bring your Python ideas to life, anytime, anywhere.
You have a great website here. These days, it's hard to discover writing of the caliber you do. Sincerely, I value people like you! Be careful!Best software Training Institute in Coimbatore
Becoming a Java Developer: A Step-by-Step Guide
Unlock your potential as a Java Developer! This tutorial covers essential Java concepts, tools, and frameworks to help you build dynamic applications. Perfect for beginners and those looking to level up their programming skills and career.
Java Code Explained: Step-by-Step for New Programmers
Unlock the power of programming with Java Code! This tutorial covers everything from basic syntax to advanced concepts, helping you write clean, efficient Java code. Perfect for beginners and experienced developers looking to enhance their skills.
Master Java Basics: The Foundation for Advanced Coding
Unlock the fundamentals of programming with Java Basics. This tutorial covers essential concepts like variables, data types, and control structures. Perfect for beginners, it will set you up with the skills needed to build Java applications confidently.
What is Java? A Beginner’s Guide to the Language
Discover the basics of Java with our tutorial, "What is Java?" Understand its core concepts, applications, and why it's one of the most popular programming languages. Perfect for beginners looking to dive into the world of software development.
Top Benefits of Using an Online Java Compiler for Your Projects
Our Online Java Compiler allows you to write, compile, and run Java code directly from your browser. It's perfect for beginners, students, and professionals looking for a fast, accessible, and easy way to test Java programs online.
Don’t Just Code—Class It Up with Python!
Don’t Just Code—Class It Up with Python! explores the power and purpose of using classes in Python programming. This beginner-friendly guide breaks down how Python classes help organize code, model real-world objects, and create scalable, reusable structures. Instead of just writing lines of code, you'll learn how to think in terms of objects, behaviors, and properties—making your code cleaner and more efficient. It's the perfect introduction to object-oriented thinking for anyone ready to level up their Python skills.
Online TypeScript Compiler vs Local Setup: Which Is Better?
Online TypeScript Compiler vs Local Setup: Which Is Better? dives into the pros and cons of using an online TypeScript compiler versus setting up a local development environment. This comparison helps developers decide which approach suits their workflow, offering insights into speed, convenience, flexibility, and performance. Whether you're a beginner looking for quick access or an experienced coder needing full control, this guide helps you choose the right setup for your TypeScript projects with clarity and confidence.
Brainery Spot Technology is the best Software training institute in Coimbatore, Python Course in Coimbatore, Java Course in Coimbatore, Full Stack Development Course in Coimbatore, Data Science Course in Coimbatore, Digital Marketing Course in Coimbatore, UI UX course in Coimbatore, AWS course in Coimbatore, Devops course in Coimbatore, and Internship Course in Coimbatore for college students, job seekers, career switchers, and working professionals
Thanks. Awesome post!
Skyappz Academy stands as the No.1 Training Institute in Coimbatore. We are the Best AI training institute in Coimbatore, offering Deep learning AI training in Coimbatore a range of IT and cloud training programs. You can choose your specialty and bridge the knowledge gap and technical skills by understanding the newest technologies.
Master the essentials of Python programming with this comprehensive tutorial. Learn variables, data types, loops, functions, and more—perfect for beginners and those looking to strengthen their coding skills through hands-on examples and clear explanations.
Kickstart your web development journey with "Learn ReactJS for Beginners." This hands-on tutorial covers the fundamentals of React, including components, state, and props, making it perfect for newcomers looking to build dynamic web applications confidently.
Learn the basics of CSS in this beginner-friendly tutorial. Discover how to style websites with colors, fonts, layouts, and more. Perfect for those new to web design, this course will help you build visually appealing and responsive web pages.
Master the fundamentals of C programming with this comprehensive tutorial. Ideal for beginners, it covers syntax, data types, functions, and more to build a strong programming foundation and enhance your coding skills. Start your C journey today!
Learn Python from scratch with this comprehensive Python Tutorial. Designed for beginners and intermediate learners, this Python Tutorial covers essential concepts, syntax, and real-world examples to help you code confidently and build powerful applications. Start your Python journey today with expert guidance!
Learn backend development with our Node.js Tutorial. This comprehensive guide covers everything from basics to advanced concepts, perfect for beginners and professionals. Master JavaScript on the server side with practical examples and hands-on coding. Start your Node.js Tutorial journey today and boost your skills!
Learn modern web development with this React Tutorial. Master components, hooks, state management, and more through hands-on examples. Whether you're a beginner or looking to refine your skills, this React Tutorial provides a clear, structured path to building dynamic and responsive user interfaces.
Learn the fundamentals of web design with our CSS Tutorial. This comprehensive guide covers styling, layout, and responsive design, helping you create visually appealing websites. Whether you're a beginner or need a refresher, our CSS Tutorial makes learning CSS easy and effective.
Master the C Programming Language Tutorial with this comprehensive guide designed for beginners and intermediate learners. Learn syntax, functions, pointers, and memory management step by step. This C Programming Language Tutorial builds a strong foundation for programming and prepares you for advanced coding concepts.
Etoile Info Solutions stands as the Best Website Designing Company In Delhi NCRR, offering innovative, user-friendly, and responsive web designs. We craft digital experiences that elevate your brand, drive engagement, and boost online conversions with creative precision and technical excellence.
Great Article… I love to read your articles because your writing style is too good, its is very very helpful for all of us
Great Python tutorial! This guide is perfect for beginners looking to learn Python programming. The explanations are clear and easy to follow, making it an excellent starting point. If you're new to coding, this Python tutorial will definitely help you build a strong foundation and gain confidence in programming.
Great Java tutorial! This guide is perfect for beginners looking to understand the fundamentals of Java. It explains the concepts clearly and step-by-step, making it easy to follow. Anyone wanting to learn Java programming language should definitely check this out. A solid starting point for mastering Java development!
Great JavaScript tutorial! This guide is super helpful for beginners looking to understand the basics of JavaScript. Clear explanations and structured steps make learning easy and fun. Perfect for anyone starting their coding journey. Thanks for sharing such valuable content to help others learn JavaScript effectively!
Great SQL tutorial! This guide is perfect for beginners looking to understand database concepts. It explains the basics clearly and helps build a strong foundation. If you're new to data management, this SQL tutorial is a great starting point to learn how to organize, query, and manage data effectively.
Great post! For anyone looking to get started with databases, a solid MySQL tutorial is essential. It helps you understand how to efficiently manage and query data, which is crucial for web development and applications. Thanks for sharing such helpful insights!
I must say that you are my favourite author. You always bring surprised things for me everytime I see your articles
Thanks for sharing this wonderful post with us. This is more helpful for explain how elder law lawyers thinks about families and their future. skyappz academy provide best data science course in coimbatore
This article is fantastic, providing valuable insights. Such content keeps users engaged. Keep sharing more informative posts. Best of luck!, we are providing a nice course click here Devops course fees
Post a Comment