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/manipulate.test.js |
unit
|
javascript | This Jest unit test verifies date manipulation operations in Day.js by comparing against Moment.js implementation. |
| test/plugin/advancedFormat.test.js |
unit
|
javascript | This Jest unit test verifies Day.js advanced formatting functionality against Moment.js for format patterns, localization, and timezone handling. |
| test/plugin/badMutable.test.js |
unit
|
javascript | This Jest unit test verifies Day.js date manipulation methods maintain immutability while matching Moment.js behavior. |
| test/plugin/buddhistEra.test.js |
unit
|
javascript | This Jest unit test verifies Buddhist Era date formatting functionality in the dayjs library through comparison with moment.js implementations. |
| test/plugin/calendar.test.js |
unit
|
javascript | This Jest unit test verifies Day.js calendar plugin functionality including relative date formatting, custom formats, and locale-specific implementations. |
| test/plugin/isMoment.test.js |
unit
|
javascript | This Jest unit test verifies the isMoment plugin’s ability to correctly identify Day.js objects and distinguish them from native Date objects. |
| test/plugin/isSameOrBefore.test.js |
unit
|
javascript | This Jest unit test verifies the isSameOrBefore plugin functionality for date comparisons in Day.js across different time granularities. |
| test/plugin/isTomorrow.test.js |
unit
|
javascript | This Jest unit test verifies the isTomorrow plugin functionality for date comparison in Day.js library. |
| test/plugin/isoWeek.test.js |
unit
|
javascript | This Jest unit test verifies ISO week calculations and manipulations in Day.js against Moment.js reference implementations. |
| test/plugin/localeData.test.js |
unit
|
javascript | This Jest unit test verifies locale-specific date formatting and manipulation functionality in the Day.js library against Moment.js reference implementation. |