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Day.js Testing – Jest Unit Testing Implementation

The dayjs library's testing suite demonstrates a comprehensive unit testing approach using Jest as the primary testing framework. The test suite includes 92 test cases covering core utilities, plugin functionality, and locale-specific features, with particular attention to datetime manipulation, formatting operations, and TypeScript declarations verification. Qodo Tests Hub provides developers with detailed insights into dayjs's testing patterns, making it easier to understand how to effectively test datetime libraries. Through the platform, developers can explore real-world examples of Jest unit tests, examine timezone handling implementations, and learn best practices for testing internationalization features. This practical knowledge helps teams implement more robust testing strategies in their own projects.

Path Test Type Language Description
test/issues/issue2027.swapped-order.test.js
unit
javascript This Jest unit test verifies Day.js plugin ordering and date manipulation operations between Duration and ObjectSupport plugins.
test/locale/ar-kw.test.js
unit
javascript This Jest unit test verifies Arabic (Kuwait) locale meridiem formatting in Day.js library.
test/locale/ar-ma.test.js
unit
javascript This Jest unit test verifies Arabic (Morocco) meridiem formatting functionality in the Day.js library
test/locale/ar-tn.test.js
unit
javascript This Jest unit test verifies Arabic-Tunisian locale meridiem formatting in Day.js library.
test/locale/ar-sa.test.js
unit
javascript This Jest unit test verifies Arabic (Saudi Arabia) meridiem formatting functionality in the Day.js library.
test/locale/ar-ly.test.js
unit
javascript This Jest unit test verifies Arabic (Libya) locale meridiem formatting in the Day.js library
test/locale/bn-bd.test.js
unit
javascript This Jest unit test verifies Bengali (Bangladesh) locale implementation in Day.js through comparison with Moment.js reference implementations.
test/locale/br.test.js
unit
javascript This Jest unit test verifies Breton locale formatting and relative time calculations in Day.js against Moment.js implementations.
test/locale/de.test.js
unit
javascript This Jest unit test verifies German locale implementations and relative time formatting in Day.js across multiple regional variants.
test/locale/bn.test.js
unit
javascript This Jest unit test verifies Bengali locale implementation in dayjs by comparing its output with moment.js reference implementation.