Report an issue

Practice quizzes for Australian citizenship, driving, and immigration topics

Quizzes

AI Skills & Workflows

Writing the test first forces you to define the expected behaviour precisely, and a passing test after implementation proves the code actually satisfies that definition

Tests written after implementation run faster because they can be optimised based on the code structure

Writing a failing test first reserves a slot in the CI pipeline before the code is ready

The failing test alerts other developers that the feature is still in progress

A TDD skill mandates writing a failing test before writing any implementation code. Which scenario best illustrates why this order is critical?