unit test
Test whether the input and output of the smallest unit (function/component) are correct. Quick, isolated, and easy to locate issues. Front end Jest/Vitest, backend Pytest/JUnit.
integration testing
Test whether multiple modules work together correctly, such as API interfaces and database interactions. Between unit testing and E2E.
E2E testing
Simulate real user operations and test the entire process from start to finish. Such as logging in → browsing → placing an order → payment. Tools: Cypress, Playwright, Selenium.
Performance Testing
Performance of the testing system under high concurrency: response time, throughput, and concurrent user count. Tools: JMeter, K6, Lighthouse.
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