95c729f5d1
This commit adds support in the Angular monorepo and in the Angular compiler(s) for TypeScript 3.8. All packages can now compile with TS 3.8. For most of the repo, only a handful few typings adjustments were needed: * TS 3.8 has a new `CustomElementConstructor` DOM type, which enforces a zero-argument constructor. The `NgElementConstructor` type previously declared a required `injector` argument despite the fact that its implementation allowed `injector` to be optional. The interface type was updated to reflect the optionality of the argument. * Certain error messages were changed, and expectations in tests were updated as a result. * tsserver (part of language server) now returns performance information in responses, so test expectations were changed to only assert on the actual body content of responses. For compiler-cli and schematics (which use the TypeScript AST) a major breaking change was the introduction of the export form: ```typescript export * as foo from 'bar'; ``` This is a `ts.NamespaceExport`, and the `exportClause` of a `ts.ExportDeclaration` can now take this type as well as `ts.NamedExports`. This broke a lot of places where `exportClause` was assumed to be `ts.NamedExports`. For the most part these breakages were in cases where it is not necessary to handle the new `ts.NamedExports` anyway. ngtsc's design uses the `ts.TypeChecker` APIs to understand syntax and so automatically supports the new form of exports. The View Engine compiler on the other hand extracts TS structures into metadata.json files, and that format was not designed for namespaced exports. As a result it will take a nontrivial amount of work if we want to support such exports in View Engine. For now, these new exports are not accounted for in metadata.json, and so using them in "folded" Angular expressions will result in errors (probably claiming that the referenced exported namespace doesn't exist). Care was taken to only use TS APIs which are present in 3.7/3.6, as Angular needs to remain compatible with these for the time being. This commit does not update angular.io. PR Close #35864 |
||
|---|---|---|
| .. | ||
| bazel | ||
| bazel-schematics | ||
| cli-hello-world | ||
| cli-hello-world-ivy-compat | ||
| cli-hello-world-ivy-i18n | ||
| cli-hello-world-ivy-minimal | ||
| cli-hello-world-lazy | ||
| cli-hello-world-lazy-rollup | ||
| dynamic-compiler | ||
| hello_world__closure | ||
| hello_world__systemjs_umd | ||
| i18n | ||
| injectable-def | ||
| ivy-i18n | ||
| language_service_plugin | ||
| ng_elements | ||
| ng_elements_schematics | ||
| ng_update | ||
| ng_update_migrations | ||
| ngcc | ||
| platform-server | ||
| service-worker-schema | ||
| side-effects | ||
| terser | ||
| typings_test_ts36 | ||
| typings_test_ts37 | ||
| typings_test_ts38 | ||
| .gitignore | ||
| BUILD.bazel | ||
| README.md | ||
| _payload-limits.json | ||
| angular_integration_test.bzl | ||
| check-dependencies.js | ||
| get-sharded-tests.js | ||
| run_tests.sh | ||
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.jsonfile - The test runner will run
yarnandyarn teston 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.lockfiles are up-to-date with the correspondingpackage.jsonfiles (wrt the non-local dependencies - i.e. dependencies whose versions do not start withfile:).You can update a
yarn.lockfile by runningyarn installin 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.
- Add new test to
INTEGRATION_TESTSobject in/integration/BUILD.bazel(and tag as"no-ivy-aot"if not meant to be run against ivy bundles). NB: if the test requires any special attribute then make a new angular_integration_test target instead. - 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
- Add at least the following two entries
.bazelignore(as they may contain BUILD files)integration/new_test/node_modulesintegration/new_test/.yarn_local_cache
- Add any other untracked folders to
.bazelignorethat may containBUILDfiles - If there are tracked BUILD files in the integration test folder (
integration/bazelhas these for example) add those folders to thebuild --deleted_packagesandquery --deleted_packageslines 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