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## Summary To prevent the flash of "loading..." and "calculating dimensions" when loading cached images only set loading set if longer than 250ms ## Changes - **What**: ImagePreview.vue - **Breaking**: <!-- Any breaking changes (if none, remove this line) --> - **Dependencies**: <!-- New dependencies (if none, remove this line) --> ## Review Focus <!-- Critical design decisions or edge cases that need attention --> <!-- If this PR fixes an issue, uncomment and update the line below --> <!-- Fixes #ISSUE_NUMBER --> ## Screenshots (if applicable) The retrigger loading is because i have throttled 4g slow in the demo. So cache takes time. Normally this doesn't happen. https://github.com/user-attachments/assets/335ca7e4-4ce1-43dd-b7d0-9ee88e187069 ┆Issue is synchronized with this [Notion page](https://www.notion.so/PR-7268-fix-loading-state-to-show-loader-only-if-it-takes-more-than-150ms-2c46d73d365081a6b311f78ba3e1cffd) by [Unito](https://www.unito.io)
ComfyUI Frontend Testing Guide
This guide provides an overview of testing approaches used in the ComfyUI Frontend codebase. These guides are meant to document any particularities or nuances of writing tests in this codebase, rather than being a comprehensive guide to testing in general. By reading these guides first, you may save yourself some time when encountering issues.
Testing Documentation
Documentation for unit tests is organized into three guides:
- Component Testing - How to test Vue components
- Unit Testing - How to test utility functions, composables, and other non-component code
- Store Testing - How to test Pinia stores specifically
Testing Structure
The ComfyUI Frontend project uses a mixed approach to unit test organization:
- Component Tests: Located directly alongside their components with a
.spec.tsextension - Unit Tests: Located in the
tests-ui/tests/directory - Store Tests: Located in the
tests-ui/tests/store/directory - Browser Tests: These are located in the
browser_tests/directory. There is a dedicated README in thebrowser_tests/directory, so it will not be covered here.
Test Frameworks and Libraries
Our tests use the following frameworks and libraries:
- Vitest - Test runner and assertion library
- @vue/test-utils - Vue component testing utilities
- Pinia - For store testing
Getting Started
To run the tests locally:
# Run unit tests
pnpm test:unit
# Run unit tests in watch mode
pnpm test:unit:dev
Refer to the specific guides for more detailed information on each testing type.