Programming Concepts Beginner

What is Unit Testing?

Testing individual components or functions of a program in isolation to verify they work correctly.

Unit tests verify that individual functions, methods, or classes produce correct output for given inputs. They run fast, test in isolation (using mocks/stubs for dependencies), and provide immediate feedback when code breaks.

Popular frameworks include pytest (Python), JUnit (Java), Jest (JavaScript), and PHPUnit (PHP). Test-Driven Development (TDD) writes tests before implementation. Good tests are independent, repeatable, and cover edge cases.

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Related Terms

A data structure that follows Last-In-First-Out (LIFO) ordering, where elements are added and removed from the same end (top).

The smallest unit of execution within a process, allowing concurrent operations to run within a single program.

Event-Driven Architecture

A software design pattern where components communicate by producing and consuming events rather than direct method calls.

A software development methodology that emphasizes iterative development, collaboration, and rapid response to change.

DRY (Don't Repeat Yourself)

A software development principle that aims to reduce code duplication by abstracting common patterns into reusable components.

A step-by-step procedure for solving a problem or performing a computation, defined as a finite sequence of instructions.

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