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 linear data structure where elements are stored in nodes, each containing data and a pointer to the next node in the sequence.

A reusable solution template for commonly occurring problems in software design.

A bug that occurs when the behavior of software depends on the timing or order of uncontrolled events like thread scheduling.

DRY (Don't Repeat Yourself)

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

A data structure that follows First-In-First-Out (FIFO) ordering, where elements are added at the rear and removed from the front.

Functional Programming

A programming paradigm that treats computation as the evaluation of mathematical functions, avoiding state changes and mutable data.

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