* [ts] upgrade to 3.5.2
* [ts] run from cwd so that relative paths are correct
* move eslint-disable-line comment into jsx attribute
* autofix eslint violations
* avoid generic type, it's not necessary and problematic
* make elasticsearch.cluster optional, many instances don't have them
* remove invalid prop
* expand AllowUnknownProperties to cleanly handle arrays
* esfilter values can sometimes be an array of strings
* allow exception objects to have unknown properties
* define accumulator as a boolean
* fix return type
* return a 404 if beat isn't found after update
* use Object.values for better types
* define return type of get() call
* define value type for Set
* define return value of get()
* define State property type
* use less get(), so ts can infer types
* define Set item type
* map state type
* make default_operator optional, since it's not always defined
* remove seemingly unused prop
* define return type of get() fn
* define inner type for state
* don't define base types are objects with index signatues
* regenerate public api docs
* make indices privileges optional too
* remove unnecessary index-signature from Exception interface
* use variadic _arg instead
* [core/plugin] use Record<string, any> rather than {}
* replace a couple more instances of {}
* revert some unnecessary changes
* remove unused types
* [reporting] output, payload, and meta are required properties
* bump to latest patch version
# Cypress Tests
The `siem/cypress` directory contains end to end tests (specific to the `SIEM` app) that execute via [Cypress](https://www.cypress.io/).
At present, these tests are only executed in a local development environment; they are **not** integrated in the Kibana CI infrastructure, and therefore do **not** run automatically when you submit a PR.
See the `Server and Authentication Requirements` section below for additional details.
## Organizing Tests and (Mock) Data
- Code and CSS selectors that may be re-used across tests should be added to `siem/cypress/integration/lib`, as described below
- Smoke Tests are located in `siem/cypress/integration/smoke_tests`
- Mocked responses from the server are located in `siem/cypress/fixtures`
### `cypress/integration/lib`
The `cypress/integration/lib` folder contains code intended to be re-used across many different tests.
- Files named `helpers.ts` (e.g. `siem/cypress/integration/lib/login/helpers.ts`) contain functions (e.g. `login`) that may be imported and invoked from multiple tests.
- Files named `selectors.ts` export CSS selectors for re-use. For example, `siem/cypress/integration/lib/login/selectors.ts` exports the following selector that matches the Username text area in the Kibana login page:
```
export const USERNAME = '[data-test-subj="loginUsername"]';
```
## Server and Authentication Requirements
The current version of the Smoke Tests require running a local Kibana server that connects to an instance of `elasticsearch`. A file named `config/kibana.dev.yml` like the example below is required to run the tests:
```yaml
elasticsearch:
username: 'elastic'
password: '<password>'
hosts: ['https://<server>:9200']
```
The `username` and `password` from `config/kibana.dev.yml` will be read by the `login` test helper function when tests authenticate with Kibana.
See the `Running Tests Interactively` section for details.
## Running Tests Interactively
To run tests in interactively via the Cypress test runner:
1. Create and configure a `config/kibana.dev.yml`, as described in the `Server and Authentication Requirements` section above.
2. Start a local instance of the Kibana development server:
```
yarn start --no-base-path
```
3. Launch the Cypress interactive test runner:
```sh
cd x-pack/legacy/plugins/siem
yarn cypress:open
```
4. Click the `Run all specs` button in the Cypress test runner
https://github.com/elastic/ingest-dev/issues/515
* chore(NA): add transpile with babel the typescript files on xpack when build.
* chore(NA): fix the globs for public folders inside server paths
* docs(NA): add comments to explain globs.
* chore(NA): use pipeline instead of async pipeline promise from dev utils. chore(NA): change globs definitions to match the overall convention.
* chore(NA): apply documented way to use stream pipeline.
* chore(NA): exclude test files from the build transpilation.
* chore(NA): add ignore for eslint complexity warning
* chore(na): fix bad added type files.
* fix(NA): unused type exports
* Pin dependencies
* include core-js in babel packages
* specify core-js version when using `useBuiltIns`
* dedupe @babel/types to avoid "range of null" problem
getopts added the `string` option in a recent version, which I didn't realize when I made updates to src/dev/run/run.ts, which rely on this option. To make sure it is available this updates getopts in all projects from `2.x` to `^2.2.4`
* chore(NA): first changes on every package.json order to support new babel 7. chore(NA): build for kbn-pm with babel 7.
* chore(NA): patch babel register to load typescrit
* chore(NA): first working version with babel 7 replacing typescript compiler.
* fix(NA): common preset declaration in order to make it work with babel-loader.
* chore(na): organizing babel preset env package json.
* chore(NA): mocha tests enabled.
* fix(NA): typo on importing
* test(NA): majority of x-pack tests ported to use babel-jest
* fix(NA): report info button test with babel-jest.
* fix(NA): polling service tests.
* test(na): fix server plugins plugin tests.
* test(NA): batch of test fixs for jest tests under babel-jest hoisting.
* chore(NA): add babel plugin to hoist mock prefixed vars on jest tests.
* chore(NA): update yarn.lock file.
* chore(NA): tests passing.
* chore(NA): remove wrong dep
* chore(NA): fix tsconfig
* chore(NA): skip babel for ts-jest.
* chore(NA): selectively apply the plugin to strip off namespace from ts files.
* chore(NA): remove not needed changes from ts tests
* chore(NA): removed ts-jest dependency. chore(NA): migrate ts tests on x-pack to use babel-jest with the new pattern.
* chore(NA): migrate kibana default distribution typescript tests to run with babel-jest and the new test mock pattern.
* chore(NA): merge and solve conflicts with master.
* chore(NA): fix problems reported by eslint
* chore(NA): fix license ovveride for babel-plugin-mock-imports
* chore(NA): update jest integration tests for kbn pm
* chore(NA): update babel jest integration tests for kbn pm.
* test(NA): update jest integration snapshot for kbn pm.
* chore(NA): apply changes according to the pull request reviews.
* chore(NA): apply changes according to the pull request reviews.
* refact(NA): migrate jest tests to the new pattern.
* fix(NA): babel 7 polyfill in the tests bundle.
* chore(NA): restore needed step in order to compile x-pack with typescript.
* chore(NA): change build to compile typescript with babel for the oss code. chore(NA): change transpile typescript task to only transpile types for x-pack. refact(NA): common preset for babel 7
* Revert "chore(NA): change build to compile typescript with babel for the oss code. chore(NA): change transpile typescript task to only transpile types for x-pack. refact(NA): common preset for babel 7"
This reverts commit 2707d538f5.
* fix(NA): import paths for tabConfigConst
* chore(NA): fix transpiling error on browser tests
* chore(NA): simplify kbn babel preset package.
* chore(NA): migrate build to use babel transpiler for typescript excluding xpack.
* fix(NA): introduced error on test quick task.
* fix(NA): fix preset for client side code on build.
* fix(NA): build with babel
* fix(NA): negated patterns in the end.
* fix(NA): kbn_tp_sample_panel_action creation.
* fix(NA): babel typescript transform plugin workaround when exporting interface name.
* refact(NA): remove not needed type cast to any on jest test.
* docs(NA): add developement documentation about jest mocks test pattern.
* chore(NA): missing unmerged path.
* chore(NA): fix jest tests for template.
* [CCR] Client integration tests (table lists) (#33525)
* Force user to re-authenticate if token refresh fails with `400` status code. (#33774)
* Improve performance of the Logstash Pipeline Viewer (#33793)
Resolves#27513.
_This PR is a combination of #31293 (the code changes) + #33570 (test updates). These two PRs were individually reviewed and merged into a feature branch. This combo PR here simply sets up the merge from the feature branch to `master`._
Summary of changes, taken from #31293:
## Before this PR
The Logstash Pipeline Viewer UI would make a single Kibana API call to fetch all the information necessary to render the Logstash pipeline. This included information necessary to render the detail drawer that opens up when a user clicks on an individual vertex in the pipeline.
Naturally, this single API call fetched _a lot_ of data, not just from the Kibana server but also, in turn, from Elasticsearch as well. The "pro" of this approach was that the user would see instantaneous results if they clicked on a vertex in a pipeline and opened the detail drawer for that vertex. The "cons" were the amount of computation Elasticsearch had to perform and the amount of data being transferred over the wire between Elasticsearch and the Kibana server as well as between the Kibana server and the browser.
## With this PR
This PR makes the Kibana API call to fetch data necessary for **initially** rendering the pipeline — that is, with the detail drawer closed — much lighter. When the user clicks on a vertex in a pipeline, a second API call is then made to fetch data necessary for the detail drawer.
## Gains, by the numbers
Based on a simple, 1-input, 1-filter, and 1-output pipeline.
* Before this PR, the Elasticsearch `logstash_stats` API responses (multiple calls were made using the `composite` aggregation over the `date_histogram` aggregation) generated a total of 1228 aggregation buckets (before any `filter_path`s were applied but across all `composite` "pages"). With this PR, the single `logstash_stats` API response (note that this is just for the initial rendering of the pipeline, with the detail drawer closed) generated 12 buckets (also before any `filter_path`s were applied). That's a **99.02% reduction** in number of buckets.
* Before this PR, the Elasticsearch `logstash_stats` API responses added up to 70319 bytes. With this PR, the single `logstash_stats` API response for the same pipeline is 746 bytes. That's a **98.93% reduction** in size.
* Before this PR, the Elasticsearch `logstash_state` API response was 7718 bytes. With this PR, the API response for the same pipeline is 2328 bytes. That's a **69.83% reduction** in size.
* Before this PR the Kibana API response was 51777 bytes. With this PR, the API response for the same pipeline is 2567 bytes (again, note that this is just for the initial rendering of the pipeline, with the detail drawer closed). That's a **95.04% reduction** in size.
* [Maps] split settings into layer and source panels (#33788)
* [Maps] split settings into layer and source panels
* fix SCSS import
* [env] exit if starting as root (#21563)
* [env] exit if starting as root
* fix windows
* s/--allow-root
* Typescript sample panel action (#33602)
* Typescript sample panel action
* Update EUI version to match main cabana version
* update yarn.lock
* add back typings include
* use correct relative path
* Home page "recent links" should communicate saved object type #21896 (#33694)
* adds object type for screen order
* adds object type for pointer hovering
* Update src/legacy/ui/public/chrome/directives/header_global_nav/components/header.tsx
Co-Authored-By: rockfield <philipp.b@ya.ru>
* Prefer third-party plugin development in plugins instead of kibana-extra
* Fix failing recursive directory creation and removal
* Add new built version of kbn-pm
* bump typescript version to 3.3.3333
* fix tests after updating TS version
* suppress type errors until they fixed appropriately
* address comments
* add type def for UnconnectedKibanaLink
* remove fix @ts-ignore
* fix snapshot test. provide displayName
* udpate jest, jest-cli, @types/jest to v24
* fix type error in kibana-i18n package
* return serivce explicitly to fix typings
* add explicit never
* suppress typings errors
* update jest versions in x-pack
* make tests in x-pack more robust and fix incompatibility
* suppress CallCluster mock typings
Mock interface doesn't match CallCluster. Requires
additional work
* x-pack. resolve other typing conflicts
* remove unused types/jest
* fix snapshots
* restore mocks after jest.spyOn
* remove outdated definitions for jest
* cleanup x-pack package.json and update @types/jest
* fix tests merged from master
* updated yarn.lock and log errors for scripts/type_check
* This commit fixes error in TS, which failed on parsing the file.
* suppress type errors from master
* jest-cli is devDep
* feat(NA): upgrade node js version on file configs.
* chore(NA): migrate configs and 3rd party dependencies to work on node js 10.x
* fix(NA): add missing async function declaration.
* chore(NA): updated elastic/good package to work with node10
* chore(NA): update lockfiles.
* fix(NA): add missing dep.
* fix(NA): types for node 10.
* test(NA): fix error return type for node10.
* fix(NA): kbn-pm webpack config to unlazy a require using lazy-cache. fix(NA): build to work with node 10.
* test(NA): jest integration test for kbn-pluin-helpers.
* test(NA): fix jest tests for kbn-es.
* fix(NA): use ostmpdir instead of a tmp folder inside the fixtures.
* fix(NA): change afterEach on kbn es decompress test.
* fix(NA): change afterEach on kbn es decompress test.
* fix(NA): readd mock-fs for the tests that still use it on kbn-es and that works on node10.
* fix(NA): readd mock-fs for the tests that still use it on kbn-es and that works on node10.
* refact(NA): rewrite tests using mock-fs and completely remove this dependency.
* fix(NA): failing test implementation using jest mock in order to replace mock-fs.
* fix(NA): update jest snapshots to match new ones generated one node 10.
* fix(NA): cli/cluster mock to spyOn off method instead off spyOn removeListener as this was changed on Node 10.
* fix(NA): tests for cluster_manager to also spyOn off and on instead of addListener and removeListener
* test(NA): fix management advance settings image field test flow.
* fix(NA): apply missing types for src/core/server/plugins/discovery/plugins_discovery.ts.
* test(NA): updated 2 missing snapshots for KuiCodeEditor on kbn-ui-framework.
* refact(NA): fix eslint errors.
* refact(NA): fix ts code with tslint fix. chore(NA): update jest snapshots.
* chore(NA): migrate kbn config schema peer dependency to last used joi version to avoid warning on bootstrap.
* fix(NA): tslint errors.
* chore(NA): upgrade types node to the last version.
* fix(NA): missing utf8 input format encoding when reading a file.
* chore(NA): upgrade to node 10.14.1
* fix(NA): Buffer api usage to avoid deprecation warnings.
* feat(NA): first dll bundler code.
* chore(NA): upgrade to webpack 4.
* chore(NA): updated package.json
* chore(NA): removed old code.
* chore(NA): add parallel option.
* chore(NA): removed console log and old var about node modules.
* chore(NA): turn off unsafe cache.
* chore(NA): update lock files.
* chore(NA): new config for dll generation.
* chore(NA): update stats emit.
* chore(NA): update dependencies.
* chore(NA): right cache loaders.
* chore(NA): remove ui_bundles alias.
* feat(20749): init implementation on bridge plugin for dll bundler.
* feat(20749): init implementation for dll compiler.
* feat(20749): dll bundler init from other process and webpack wrapper..
* feat(20749): optimizer changes to integrate with dll bundler.
* chore(20749): split into different processes.
* refact(20749): change to single running process.
* refact(NA): improvements on dll bundler plugin.
* refact(NA): removing including loop on plugins.
* refact(20749): only run dllReference once.
* chore(20749): todo on result.request path building.
* chore(NA): lock files updated.
* chore(NA): avoiding dll paths being removed.
* chore(NA): tests on sync generation.
* chore(NA): changes on entry paths compiler.
* chore(NA): different hooks tests.
* chore(20749): first working version, single process, for dynamic building dll.
* feat(20749): last gross features for the dynamicdllplugin.
* refact(20749): string interpolation when creating the path to delete in every optimizer cycle. feat(20749): creating the DynamicDllPlugin foundations.
* chore(NA): updated base optimizer run function args.
* chore(20749): first working solution with vendor dll both for prod and dev.
* chore(20749): useful todos on client dlls.
* feat(NA): auto built blacklist for server node_modules.
* refact(NA): removed unused code.
* chore(NA): update all webpack and loaders stuff to last versions.
* refact(NA): first refacts on clean taks related with dll. feat(NA): added clean empty folders task.
* refact(NA): removed support for console logs during the build.
* refact(NA): removed extra space.
* refact(NA): removed extra space.
* refact(NA): getDllModules function.
* chore(NA): removed unsafeCache option.
* feat(NA): removed unsafeCache option.
* refact(NA): apply general inheritance principles to the optimizer: hooks, and init. refact(NA): merge dynamic dll plugin into the common config. refact(NA): restore old template structure - vendors.dll style is always emitted.
* fix(NA): fs_optimizer run function by not returning inside async func.
* fix(NA): change template anchor name from vendor to vendors.
* docs(NA): added info about files were keeping when cleaning the bundles.
* fix(NA): filtering elible dll modules to delete.
* refact(NA): removed old dll bundler in favor on new dynamic dll plugin.
* refact(NA): initial split for clean modules on dll task.
* refact(NA): update new dll config model. refact(NA): update config on dynamicdllplugin.
* refact(NA): major work refactor for dynamic dll plugin.
* refact(NA): extract clean node modules on dll task to its own folder.
* refact(NA): organize imports.
* docs(NA): add docs to registerCompilerHooks function for the optimizer.
* refact(NA): finished refactor for dynamic dll plugin with correct error handling for runWebpack function.
* refact(NA): basic structure for clean client modules on dll task.
* fix(NA): resolve path for dll manifest during cclean build tasks.
* refact(NA): split webpack dll related functions to their own file for clean client modules on dll task.
* refact(NA): added error handling for the clean client modules on dll task - webpack dll related functions.
* docs(NA): added license header.
* refact(NA): complete split out the functions from the clean modules on dll task to the code_parser file.
* refact(NA): main task entries compose.
* docs(NA): extend docs for the getDependenciesFromFile function.
* refact(NA): final structure split for clean client node modules dll task.
* fix(NA): added missing param to calculate top level dependencies.
* docs(NA): completed todo description about dll location.
* fix(NA): add production option to webpack config on kbn-pm.
* docs(NA): extended documentation about style extraction.
* refact(NA): removed extra comments.
* feat(NA): env variable to force dll creation.
* feat(NA): include option to define folders to keep on delete empty folders task.
* refact(NA): remove unused method from dll compiler.
* feat(NA): move dlls outside bundles folder and support request for /dlls from a browser perspective.
* chore(NA): gitignore updated to include new dlls folder.
* chore(NA): eslintignore updated.
* chore(NA): removed strange file from repo.
* test(NA): fix failing tests for bundles_route.
* fix(NA): change paths array to path string in a server route config.
* fix(NA): remove infinite loop calls on register hooks functions.
* fix(NA): readFile should only override the file in case it not exists.
* refact(NA): removed dll compiler finish log on success with stats.
* fix(NA): dll compiler alias.
* fix(NA): dynamic dll plugin flow on needs compile.
* fix(NA): raw alias config.
* Revert "fix(NA): raw alias config."
This reverts commit ebb245a786.
* feat(NA): raw alias for moment on dll config model.
* fix(NA): removed uiBundles from base_optimizer call on dynamicdllplugin.
* chore(NA): decrease moment versions.
* chore(NA): temporary changes on dll compiler.
* fix(NA): majority of problems between dll approach, webpackshims and browser tests.
* fix(NA): webpackShims integration with client vendors dll. fix(NA): enable esm modules mutability for development. fix(NA): only clean dll contents from build when they belong to node_modules.
* fix(NA): fix for endless dll compilation loop.
* fix(NA): removed esm plugin and skipped test using wrong stub strategy.
* docs(NA): added some comments for the skipped test.
* feat(NA): considering requires inside webpackShims valid entry paths to add to the dll entry file.
* fix(NA): small fix for the max compilation logic.
* docs(NA): add small explanatory note.
* fix(NA): building requires results with relative requires found onn webpackShims.
* docs(NA): add small note for error handling on dll compiler.
* fix(NA): move precinct to prod dependencies.
* test(NA): testing running functional tests on production.
* fix(NA): restore tests run config for development flag. feat(NA): force dll creation with uiBundles is Dev flag.
* chore(NA): update dependencies.
* feat(NA): test update dll to completely match base optimizer one.
* fix(NA): removed ts.
* refact(NA): removed unused consts.
* fix(NA): set back transpile sacss task in place.
* fix(NA): fix resolve remoing ts and tsx.
* fix(NA): set back transpile sacss task in place.
* fix(NA): removing isDevmode from mustCompileDll.
* fix(NA): add search for import statements into the dependencies visitor.
* fix(NA): add dll suffix to vendors resource on ui bootstrap template.
* fix(NA): some configs for unrelated dll work projects.
* chore(NA): upgrade canvas plugins webpack build to webpack4.
* chore(NA): add shim for moment-duration-format.
* chore(NA): stup moment-duration-format into the moment webpackShim.
* chore(NA): setup moment-duration-format into the moment-timezone webpackShim.
* fix(NA): moment and moment-timezone webpackShims
* chore(NA): added moment and moment-timezone webpackShims to x-pack. fix(NA): revert changes on webpackShims for oss kibana.
* fix(NA): xpack webpackshims for moment.
* fix(NA): remove xpack webpakcshims for moment.
* fix(NA): webpakcshims for moment.
* fix(NA): remove every changes from webpackShims and xpack webpackShims.
* fix(NA): fix visitors to gather server dependencies resulting from export * from and export x, 'x' from.
* chore(NA): update some webpack related dependencies.
* fix(NA): in the dll the plugins need to have their own dependencies. It is the same for the ones into the tests relying on test against distributable.
* feat(NA): including test/plugin_functional plugins into the kbn-pm bootstrap tasks.
* fix(NA): wrong built yarn lock files.
* chore(NA): updated webpack related dependencies.
* feat(NA): add missing color for dynamic_dll_plugin logging tag.
* chore(NA): removed forgotten console.log.
* chore(NA): removed forgotten dead code.
* chore(NA): removed missing old comment.
* docs(NA): added missing notice for 2 tools we have relied on.
* refact(NA): added is to a boolean variable to keep the consistency inside the code parser strategies.
* fix(NA): update notice cli to exclude search inside dlls bundles. chore(NA): update notice file.
* feat(NA): use lodash matches in the code parser visitors logic.
* docs(NA): updated notice file related with the code parser visitors logic..
* docs(NA): added explanation for the process that decides if we should build a new dll or not.
* test(NA): added missing tests for some usefull parts of the code.
* refact(NA): split registerCompileHook function into small ones.
* chore(NA): uncomment scripts from tests.
* feat(NA): isolate code-parser in a kbn package
* fix(NA): missing relative dot into the cwd function.
* chore(NA): update all inter deps to match.
* fix(NA): rebuild the yarn locks and the package jsons based on master ones.
* fix(NA): move babel-code-parser to the prod deps.
* chore(NA): include build path instead of the base root path.
* refact(NA): integrate plugin_functional test plugins with workspaces.
* fix(NA): include missing license for plugin functional test plugins.
* fix(NA): always write posix paths into the dll entry file in order to make the dlls compilation working on windows too. chore(NA): improve error handling into dll compiler.
* fix(NA): revert wrong moved line from canvas.
* fix(NA): match ts-loader version between kibana and x-pack.
* fix(NA): sync dll compiler with base_optimizer.
* fix(NA): exclude kbn-interpreter from the dll.
* refact(NA): remove exclusion of kbn-interpretor from base_optimizer.
* chore(NA): add dlls folder to the yarn kbn clean script.
* fix(NA): missing utf8 input format encoding when reading a file to create the hash into the watch optimizer cahce.
* refact(NA): re-engineering to the dynamic_dll_plugin logs and lifecycle.
* fix(NA): update clean node modules task to search under legacy/core_plugins.
* fix(NA): fix build on windows with globby on cleaning dlls for the watch optimizer cache.
* docs(NA): update documentation for the clean client node modules build task.
* docs(NA): added extra comment to clarify the purpose for the built entrypoints.
* chore(NA): update clean client node_modules code to use posix path.
* feat(NA): add support for discovering server entries over the legacy plugins and the new plugins.
We need to share `@kbn/datemath` with `@elastic/eui`, and rather than making them rely on Kibana for their dependencies we've decided to republish `@kbn/datemath` as `@elastic/datemath`. This isn't something we want to do often, so please check with the platform team if you'd like to do this for another module.
I noticed some discussion about how kbn clean should probably clear out the `.eslintcache` file, since it doesn't handle changes in related modules (for things like the import plugin) and it would be nice if `yarn kbn clean` took care of the issue. I figured it's not a bad idea, but adding `.eslintcache` directly to `@kbn/pm` felt wrong, so instead I've added another config options that can go in the package.json file, `clean.extraPatterns`. This array of patterns is passed into `del()` so that it can include things like negation.
As the name suggests this doesn't override the initial paths, just adds some extras that will be checked and cleared when `yarn kbn clean` is run.
* chore(19834): upgraded yargs dependency to 4.8.1 in order to remove pkg-conf dependency license conflict.
* chore(19834): override xmldom to one of the allowed licenses (MIT).
* chore(19834): added some overrides and whitelistenig for Apache2.
* chore(19834): correct overides for some apache2 licenses.
* chore(NA): updated specific dependency needs.
* chore(19834): added some more info on updated licenses.
* chore(19834): small note on dependencies use versions.
* feat(NA): add the ability to white list licenses only valid for dev only dependencies.
* chore(NA): update yarn lock files to include integrity check.
* fix(NA): yarn lock file for kbn ui framework.
* docs(NA): fix uncompleted comment left on the code.
* feat(NA): remove red color from the kbn-pm logs.
* refact(NA): removed gray color from the generateColors function.
* chore(NA): update missing km pm dist file.
I was surprised when I tried to spread a `Set` in TypeScript and the browser complained about `Set.slice()` not being defined. This is because TypeScript does not automatically enable support for iterators when targeting earlier ES versions, like we do in the browser, unless you use the `"downlevelIteration": true` compiler option. This injects some helpers into the necessary files for reading/spreading iterators, which can be stuffed behind an import statement with using the `"importHelpers": true` compiler option and include `tslib` in our dependencies. This is already a dependency of several of our packages, so it shouldn't cause any additional modules.
I'd really like to upgrade to Typescript 3 for its `unknown` type, but we need to upgrade to `jest@23` to support a recent version of `ts-jest@23`.
The [jest changelog](https://github.com/facebook/jest/blob/master/CHANGELOG.md) breaks down the breaking changes in 23.x, but I found it to be slightly incomplete so I've broken down the changes that actually caused breaks for us here, and addressed each in individual commits to make review a little easier:
- the `testURL` config default was changed from `about:blank` to `http://localhost`
- this cause some XHR requests powered by JSdom to start failing. It seems these requests just do nothing in master but start to fail when JSdom is initialized with an actual URL... I think we would ideally stop sending meaningless XHR requests in the tests, but it was a lot easier to just set the config to `about:blank` for now, and we can worry about cleanup later if necessary
- `expect(...).toThrow()` only passes if an actual error was thrown.
- In two places in the index pattern code we were throwing strings, which broke the assertions. Fortunately/Unfortunately the errors are not being consumed by anything, so I was able to wrap them in `new Error()` without causing any issues.
- snapshots of mock functions now include a `results` array, detailing the return values of the function
- React fragments are now serialized as `<React.Fragment>` instead of `<UNDEFINED>`
- undefined props in React components are now stripped from snapshots
- minor changes to the ordering of mocks, imports resolution, and before hooks caused the uiSettings API tests to start breaking, but I'm replacing them with totally new tests in #22694 so I just deleted them here
- mocks created with `jest.spyOn()` that are restored now have their `mock.calls` reset, so some of the kbn-pm tests stated failing. This was fixed by restoring them with `jest.restoreAllMocks()` rather than trying to do it before the assertions
