angular-cn/integration
Joey Perrott 6402a9ae2a build: rebuild yarn lock from scratch (#36377)
Rebuild the yarn lock file from scratch to collapse instances where
one package is able to satisfy multiple dependencies.  Currently we
have some situations where we have multiple versions when one would
work.

Example:
```
"@babel/code-frame@^7.0.0":
  version "7.0.0"
  resolved "https://registry.yarnpkg.com/@babel/cod
  integrity sha512-OfC2uemaknXr87bdLUkWog7nYuliM9Ij
  dependencies:
    "@babel/highlight" "^7.0.0"

"@babel/code-frame@^7.5.5":
  version "7.5.5"
  resolved "https://registry.yarnpkg.com/@babel/cod
  integrity sha512-27d4lZoomVyo51VegxI20xZPuSHusqbQ
  dependencies:
    "@babel/highlight" "^7.0.0"

"@babel/code-frame@^7.8.3":
  version "7.8.3"
  resolved "https://registry.yarnpkg.com/@babel/cod
  integrity sha512-a9gxpmdXtZEInkCSHUJDLHZVBgb1QS0j
  dependencies:
    "@babel/highlight" "^7.8.3"
```

becomes

```
"@babel/code-frame@^7.0.0", "@babel/code-frame@^7.5.5", "@babel/code-frame@^7.8.3":
  version "7.8.3"
  resolved "https://registry.yarnpkg.com/@babel/cod
  integrity sha512-a9gxpmdXtZEInkCSHUJDLHZVBgb1QS0j
  dependencies:
    "@babel/highlight" "^7.8.3"
```

PR Close #36377
2020-04-03 11:09:17 -07:00
..
bazel build(zone.js): update zone.js version to 0.10.3 (#36214) 2020-03-31 10:59:17 -07:00
bazel-schematics build: depend on bazelisk rather than directly on Bazel (#36078) 2020-03-16 10:58:06 -07:00
cli-hello-world build(zone.js): update zone.js version to 0.10.3 (#36214) 2020-03-31 10:59:17 -07:00
cli-hello-world-ivy-compat build(zone.js): update zone.js version to 0.10.3 (#36214) 2020-03-31 10:59:17 -07:00
cli-hello-world-ivy-i18n build(zone.js): update zone.js version to 0.10.3 (#36214) 2020-03-31 10:59:17 -07:00
cli-hello-world-ivy-minimal build(zone.js): update zone.js version to 0.10.3 (#36214) 2020-03-31 10:59:17 -07:00
cli-hello-world-lazy build(zone.js): update zone.js version to 0.10.3 (#36214) 2020-03-31 10:59:17 -07:00
cli-hello-world-lazy-rollup build(zone.js): update zone.js version to 0.10.3 (#36214) 2020-03-31 10:59:17 -07:00
dynamic-compiler build(zone.js): update zone.js version to 0.10.3 (#36214) 2020-03-31 10:59:17 -07:00
hello_world__closure build(zone.js): update zone.js version to 0.10.3 (#36214) 2020-03-31 10:59:17 -07:00
hello_world__systemjs_umd build(zone.js): update zone.js version to 0.10.3 (#36214) 2020-03-31 10:59:17 -07:00
i18n build(zone.js): update zone.js version to 0.10.3 (#36214) 2020-03-31 10:59:17 -07:00
injectable-def build(zone.js): update zone.js version to 0.10.3 (#36214) 2020-03-31 10:59:17 -07:00
ivy-i18n build(zone.js): update zone.js version to 0.10.3 (#36214) 2020-03-31 10:59:17 -07:00
language_service_plugin build: typescript 3.8 support (#35864) 2020-03-10 17:51:20 -04:00
ng_elements build(zone.js): update zone.js version to 0.10.3 (#36214) 2020-03-31 10:59:17 -07:00
ng_elements_schematics build: fix integration tests flakes using local yarn cache for bazel-schematics & ng_elements_schematics demos (#35877) 2020-03-05 15:30:20 -05:00
ng_update build(zone.js): update zone.js version to 0.10.3 (#36214) 2020-03-31 10:59:17 -07:00
ng_update_migrations feat(core): undecorated-classes migration should handle derived abstract classes (#35339) 2020-04-02 10:51:49 -07:00
ngcc build(zone.js): update zone.js version to 0.10.3 (#36214) 2020-03-31 10:59:17 -07:00
platform-server build(zone.js): update zone.js version to 0.10.3 (#36214) 2020-03-31 10:59:17 -07:00
service-worker-schema build(zone.js): update zone.js version to 0.10.3 (#36214) 2020-03-31 10:59:17 -07:00
side-effects Revert "refactor: use isObservable provided by rxjs 6.1+ (#27668)" 2019-11-27 13:00:59 -08:00
terser build(zone.js): update zone.js version to 0.10.3 (#36214) 2020-03-31 10:59:17 -07:00
typings_test_ts36 build(zone.js): update zone.js version to 0.10.3 (#36214) 2020-03-31 10:59:17 -07:00
typings_test_ts37 build(zone.js): update zone.js version to 0.10.3 (#36214) 2020-03-31 10:59:17 -07:00
typings_test_ts38 build(zone.js): update zone.js version to 0.10.3 (#36214) 2020-03-31 10:59:17 -07:00
.gitignore build: add npm package manifest to npm_integration_test (#35669) 2020-02-26 12:58:35 -08:00
BUILD.bazel build: remove legacy integration test runner (#35985) 2020-03-11 15:12:33 -07:00
README.md build: remove legacy integration test runner (#35985) 2020-03-11 15:12:33 -07:00
_payload-limits.json build: rebuild yarn lock from scratch (#36377) 2020-04-03 11:09:17 -07:00
angular_integration_test.bzl build: depend on bazelisk rather than directly on Bazel (#36078) 2020-03-16 10:58:06 -07:00
check-dependencies.js ci: check versions of non-local integration project dependencies (#33968) 2019-11-26 16:08:33 -08:00
run_tests.sh build: remove legacy integration test runner (#35985) 2020-03-11 15:12:33 -07:00

README.md

Integration tests for Angular

This directory contains end-to-end tests for Angular. Each directory is a self-contained application that exactly mimics how a user might expect Angular to work, so they allow high-fidelity reproductions of real-world issues.

For this to work, we first build the Angular distribution via ./scripts/build/build-packages-dist.js, then install the distribution into each app.

To test Angular CLI applications, we use the cli-hello-world-* integration tests. When a significant change is released in the CLI, the applications should be updated with ng update:

$ cd integration/cli-hello-world[-*]
$ yarn install
$ yarn ng update @angular/cli @angular-devkit/build-angular
$ yarn build
$ yarn test

Afterwards the @angular/cli and @angular-devkit/build-angular should be reverted to the file:../ urls and the main package.json should be updated with the new versions.

Render3 tests

The directory cli-hello-world-ivy-compat contains a test for render3 used with the angular cli.

The cli-hello-world-ivy-minimal contains a minimal ivy app that is meant to mimic the bazel equivalent in packages/core/test/bundling/hello_world, and should be kept similar.

Writing an integration test

The API for each test is:

  • Each sub-directory here is an integration test
  • Each test should have a package.json file
  • The test runner will run yarn and yarn test on the package

This means that the test should be started by test script, like

"scripts": {"test": "runProgramA && assertResultIsGood"}

Note that the package.json file uses a special file:../../dist scheme to reference the Angular packages, so that the locally-built Angular is installed into the test app.

Also, beware of floating (non-locked) dependencies. If in doubt, you can install the package directly from file:../../node_modules.

WARNING

Always ensure that yarn.lock files are up-to-date with the corresponding package.json files (wrt the non-local dependencies - i.e. dependencies whose versions do not start with file:).

You can update a yarn.lock file by running yarn install in the project subdirectory.

Running integration tests

$ ./integration/run_tests.sh

The test runner will first re-build any stale npm packages, then cd into each subdirectory to execute the test.

Running integration tests under Bazel

The PR https://github.com/angular/angular/pull/33927 added the ability to run integration tests with Bazel. These tests can be resource intensive so it is recommended to limit the number of concurrent test jobs with the --local_test_jobs bazel flag.

Locally, if Bazel uses all of your cores to run the maximum number of integration tests in parallel then this can lead to test timeouts and flakes and freeze up your machine while these tests are running. You can limit the number of concurrent local integration tests that run with:

yarn bazel test --local_test_jobs=<N> //integration/...

Set a reasonable local_test_jobs limit for your local machine to prevent full cpu utilization during local development test runs.

To avoid having to specify this command line flag, you may want to include it in your .bazelrc.user file:

test --local_test_jobs=<N>

The downside of this is that this will apply to all tests and not just the resource intensive integration tests.

Bazel-in-bazel integration tests

Two of the integration tests that run Bazel-in-Bazel are particularly resource intensive and are tagged "manual" and "exclusive". To run these tests use,

yarn bazel test //integration:bazel_test
yarn bazel test //integration:bazel-schematics_test

Adding a new integration test

When adding a new integration test, follow the steps below to add a bazel test target for the new test.

  1. Add new test to INTEGRATION_TESTS object in /integration/BUILD.bazel (and tag as "no-ivy-aot" if not meant to be run against ivy bundles).
  2. If test requires ports and does not support ethereal ports then make sure the port is unique and add it to the "manually configured ports" comment to document which port it is using
  3. Add at least the following two entries .bazelignore (as they may contain BUILD files)
    1. integration/new_test/node_modules
    2. integration/new_test/.yarn_local_cache
  4. Add any other untracked folders to .bazelignore that may contain BUILD files
  5. If there are tracked BUILD files in the integration test folder (integration/bazel has these for example) add those folders to the build --deleted_packages and query --deleted_packages lines in .bazelrc

Browser tests

For integration tests we use the puppeteer provisioned version of Chrome. For both Karma and Protractor tests we set a number of browser testing flags. To avoid duplication, they will be listed and explained here and the code will reference this file for more information.

No Sandbox: --no-sandbox

The sandbox needs to be disabled with the --no-sandbox flag for both Karma and Protractor tests, because it causes Chrome to crash on some environments.

See: http://chromedriver.chromium.org/help/chrome-doesn-t-start See: https://github.com/puppeteer/puppeteer/blob/v1.0.0/docs/troubleshooting.md#chrome-headless-fails-due-to-sandbox-issues

Headless: --headless

So that browsers are not popping up and tearing down when running these tests we run Chrome in headless mode. The --headless flag puts Chrome in headless mode and a number of other flags are recommended in this mode as well:

  • --headless
  • --disable-gpu
  • --disable-dev-shm-usage
  • --hide-scrollbars
  • --mute-audio

These come from the flags that puppeteer passes to chrome when it launches it in headless mode: 18f2ecdffd/lib/Launcher.js (L91)

And from the flags that the Karma ChromeHeadless browser passes to Chrome: 5f70a76de8/index.js (L171)

Disable shared memory space: --disable-dev-shm-usage

The --disable-dev-shm-usage flag disables the usage of /dev/shm because it causes Chrome to crash on some environments.

On CircleCI, the puppeteer provisioned Chrome crashes with CI we get Root cause: org.openqa.selenium.WebDriverException: unknown error: DevToolsActivePort file doesn't exist which resolves without this flag.

See: https://github.com/puppeteer/puppeteer/blob/v1.0.0/docs/troubleshooting.md#tips See: https://stackoverflow.com/questions/50642308/webdriverexception-unknown-error-devtoolsactiveport-file-doesnt-exist-while-t