55 lines
1.9 KiB
Markdown
55 lines
1.9 KiB
Markdown
# Integration tests for Angular
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This directory contains end-to-end tests for Angular. Each directory is a self-contained
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application that exactly mimics how a user might expect Angular to work, so they allow
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high-fidelity reproductions of real-world issues.
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For this to work, we first build the Angular distribution just like we would publish
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it to npm, then install the distribution into each app.
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## Writing an integration test
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The API for each test is:
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- Each sub-directory here is an integration test
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- Each test should have a `package.json` file
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- The test runner will run `yarn` and `yarn test` on the package
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This means that the test should be started by test script, like
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```
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'scripts' { 'test': 'runProgramA && assertResultIsGood' }
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```
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Note that the `package.json` file uses a special `file://../../dist` scheme
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to reference the Angular packages, so that the locally-built Angular
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is installed into the test app.
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Also, beware of floating (non-shrinkwrapped) dependencies. If in doubt
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you can install the package directly from `file:../../node_modules`. For example,
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this is useful for protractor, which has a slow post-install step
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(`webdriver-manager update`) that can be skipped when the package from
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Angular's `node_modules` is installed.
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## Running integration tests
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The first time you run the tests, you'll need some setup:
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```shell
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$ EXPERIMENTAL_ES2015_DISTRO=1 ./build.sh
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$ ./integration/build_rxjs_es6.sh
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```
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Now you can iterate on the tests by keeping the dist folder up-to-date.
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See the `package.json` of the test(s) you're debugging, to see which dist/ folders they install from.
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Then run the right `tsc --watch` command to keep those dist folders up-to-date, for example:
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```
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$ ./node_modules/.bin/tsc -p modules/@angular/core/tsconfig-build.json --target es2015 --outDir dist/packages-dist-es2015/core --watch
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```
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Now you can run the integration test, it will re-install from the dist/ folder on each run.
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```
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$ ./integration/run_tests.sh
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```
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