Restructure test files & npm scripts

Author: pimterry

.github/workflows/ci.yml

@@ -66,7 +66,7 @@ jobs:
           SENTRY_PROJECT: httptoolkit-server
           NPM_CONFIG_UNSAFE_PERM: true
 
-      - run: DOCKER_HOST=$DIND_HOST xvfb-run npm run test:release
+      - run: DOCKER_HOST=$DIND_HOST xvfb-run npm run test:integration:release
 
       - uses: actions/upload-artifact@v3
         with:

README.md

@@ -40,4 +40,5 @@ To get started:
 A few tips:
 
 * New interceptors need to be added to `src/interceptors/index.ts`. They will also need to be added to [the UI](https://github.com/httptoolkit/httptoolkit-ui).
-* The tests assume that the required applications are installed and some docker images are already pulled. See [ci.yml](.github/workflows/ci.yml) and the [build-base](https://github.com/httptoolkit/act-build-base/) image for an example of how to set this up (or just run the tests, look at the errors, and install whatever's missing).
+* Tests (both unit & integration) can be run with `npm test`, or `npm run test:unit`/`npm run test:integration` to run just the unit/integration tests.
+* Note that the integration tests assume the required applications are installed and some docker images are already pulled. See [ci.yml](.github/workflows/ci.yml) and the [build-base](https://github.com/httptoolkit/act-build-base/) image for an example of how to set this up (or just run the tests, look at the errors, and install whatever's missing).