Same test idea. Many open-source frameworks.

Side-by-side unit, TDD, BDD, HTTP, browser UX, performance, and security examples — with runnable samples and answers grounded in this repo.

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Unit, TDD, BDD, HTTP, browser UX, performance, and security ideas, each expressed in several open-source frameworks.

integration Assert a 404 JSON error contract
Missing resources return a stable JSON error shape. 3 frameworks
integration GET a resource over HTTP
Hit a real local HTTP handler and assert the JSON body. 3 frameworks
performance Smoke-load an HTTP GET
A few virtual users hit GET /items/1; fail if errors or p95 climb. 2 frameworks
performance Microbench a health handler
Burst GET /health and fail if errors or high-percentile latency climb. 2 frameworks
security Responses send isolation headers
GET /health must include nosniff and DENY framing headers. 3 frameworks
security Markup in a name does not run
Submit a script-like name and assert it is shown as text, not executed. 2 frameworks
unit Assert equality on a pure function
Call a pure function and assert the exact result. 4 frameworks
unit Specify a behavior with BDD
Write Given–When–Then in the team’s language, then bind those sentences to the SUT. 2 frameworks
unit Mock a collaborator
Replace a dependency so the unit under test stays isolated. 3 frameworks
unit Parametrize many inputs
Run the same assertion across a table of inputs. 3 frameworks
unit Grow a unit with TDD
Write a failing example first, then the smallest code that passes, then refactor. 3 frameworks
ux Invalid submit shows a message
Submit an empty form and assert the visible validation text. 2 frameworks
ux Click a link and assert the next page
Drive a real browser: click About and check the URL and heading. 2 frameworks