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/plugin/declarations.test.js |
unit
|
javascript | This Jest unit test verifies the presence of TypeScript declaration files for all Day.js plugins. |
| test/plugin/devHelper.test.js |
unit
|
javascript | This Jest unit test verifies developer warning messages and guidance functionality in Day.js timestamp parsing and locale handling. |
| test/plugin/duration.test.js |
unit
|
javascript | This Jest unit test verifies Day.js duration plugin functionality including creation, manipulation, formatting, and localization features. |
| test/plugin/isLeapYear.test.js |
unit
|
javascript | This Jest unit test verifies the isLeapYear plugin’s ability to correctly identify leap years in the dayjs library. |
| test/plugin/isBetween.test.js |
unit
|
javascript | This Jest unit test verifies the Day.js isBetween plugin’s date comparison and range validation functionality. |
| test/plugin/isToday.test.js |
unit
|
javascript | This Jest unit test verifies the isToday plugin’s ability to correctly identify current and non-current dates in dayjs. |
| test/plugin/isSameOrAfter.test.js |
unit
|
javascript | This Jest unit test verifies the isSameOrAfter plugin functionality for Day.js datetime comparisons across different time units. |
| test/plugin/isYesterday.test.js |
unit
|
javascript | This Jest unit test verifies the Day.js isYesterday plugin’s ability to correctly identify dates from the previous day. |
| test/plugin/localizedFormat.test.js |
unit
|
javascript | This Jest unit test verifies Day.js localized format plugin’s handling of date formatting across different locales and patterns. |
| test/plugin/negativeYear.test.js |
unit
|
javascript | This Jest unit test verifies Day.js’s negativeYear plugin functionality for parsing, manipulating, and comparing dates with negative years. |