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Integration test: update README

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DC 2016-09-09 01:43:41 -07:00
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README.md
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@ -56,6 +56,28 @@ Restart the app automatically every time code changes. Useful during development
$ npm run watch
```
### Run linters
```
$ npm test
```
### Run integration tests
```
$ npm run integration-test
```
The integration tests use Spectron and Tape. They click through the app, taking screenshots and comparing each one to a reference. Why screenshots?
* Ad-hoc checking makes the tests a lot more work to write
* Even diffing the whole HTML is not as thorough as screenshot diffing. For example, it wouldn't catch an bug where hitting ESC from a video doesn't correctly restore window size.
* Chrome's own integration tests use screenshot diffing iirc
* Small UI changes will break a few tests, but the fix is as easy as deleting the offending screenshots and running the tests, which will recreate them with the new look.
* The resulting Github PR will then show, pixel by pixel, the exact UI changes that were made! Ses https://github.com/blog/817-behold-image-view-modes
For MacOS, you'll need a Retina screen for the integration tests to pass.
### Package the app
Builds app binaries for Mac, Linux, and Windows.