[@kbn/expect] "fork" expect.js into repo (#33761)

* [@kbn/expect] "fork" expect.js into repo

* [eslint] autofix references to expect.js

* [tslint] autofix all expect.js imports

* now that expect.js is in strict mode, avoid reassigning fn.length

Author: Spencer

.eslintrc.js

@@ -47,6 +47,15 @@ module.exports = {
   rules: {
     'no-restricted-imports': [2, restrictedModules],
     'no-restricted-modules': [2, restrictedModules],
+    '@kbn/eslint/module_migration': [
+      'error',
+      [
+        {
+          from: 'expect.js',
+          to: '@kbn/expect',
+        },
+      ],
+    ],
   },
 
   overrides: [

TYPESCRIPT.md

@@ -111,7 +111,7 @@ If yarn doesn't find the module it may not have types.  For example, our `rison_
 
 1. Contribute types into the DefinitelyTyped repo itself, or
 2. Create a top level `types` folder and point to that in the tsconfig. For example, Infra team already handled this for `rison_node` and added: `x-pack/plugins/infra/types/rison_node.d.ts`. Other code uses it too so we will need to pull it up. Or,
-3. Add a `// @ts-ignore` line above the import. This should be used minimally, the above options are better. However, sometimes you have to resort to this method. For example, the `expect.js` module will require this line. We don't have type definitions installed for this library. Installing these types would conflict with the jest typedefs for expect, and since they aren't API compatible with each other, it's not possible to make both test frameworks happy. Since we are moving from mocha => jest, we don't see this is a big issue.
+3. Add a `// @ts-ignore` line above the import. This should be used minimally, the above options are better. However, sometimes you have to resort to this method.
 
 ### TypeScripting react files
 

docs/development/core/development-functional-tests.asciidoc

@@ -82,7 +82,7 @@ Use the `--help` flag for more options.
 [float]
 ===== Environment
 
-The tests are written in https://mochajs.org[mocha] using https://github.com/Automattic/expect.js[expect] for assertions.
+The tests are written in https://mochajs.org[mocha] using https://github.com/elastic/kibana/tree/master/packages/kbn-expect[@kbn/expect] for assertions.
 
 We use https://sites.google.com/a/chromium.org/chromedriver/[chromedriver], https://theintern.github.io/leadfoot[leadfoot], and https://github.com/theintern/digdug[digdug] for automating Chrome. When the `FunctionalTestRunner` launches, digdug opens a `Tunnel` which starts chromedriver and a stripped-down instance of Chrome. It also creates an instance of https://theintern.github.io/leadfoot/module-leadfoot_Command.html[Leadfoot's `Command`] class, which is available via the `remote` service. The `remote` communicates to Chrome through the digdug `Tunnel`. See the https://theintern.github.io/leadfoot/module-leadfoot_Command.html[leadfoot/Command API] docs for all the commands you can use with `remote`.
 
@@ -122,11 +122,11 @@ A test suite is a collection of tests defined by calling `describe()`, and then
 [float]
 ===== Anatomy of a test file
 
-The annotated example file below shows the basic structure every test suite uses. It starts by importing https://github.com/Automattic/expect.js[`expect.js`] and defining its default export: an anonymous Test Provider. The test provider then destructures the Provider API for the `getService()` and `getPageObjects()` functions. It uses these functions to collect the dependencies of this suite. The rest of the test file will look pretty normal to mocha.js users. `describe()`, `it()`, `before()` and the lot are used to define suites that happen to automate a browser via services and objects of type `PageObject`.
+The annotated example file below shows the basic structure every test suite uses. It starts by importing https://github.com/elastic/kibana/tree/master/packages/kbn-expect[`@kbn/expect`] and defining its default export: an anonymous Test Provider. The test provider then destructures the Provider API for the `getService()` and `getPageObjects()` functions. It uses these functions to collect the dependencies of this suite. The rest of the test file will look pretty normal to mocha.js users. `describe()`, `it()`, `before()` and the lot are used to define suites that happen to automate a browser via services and objects of type `PageObject`.
 
 ["source","js"]
 ----
-import expect from 'expect.js';
+import expect from '@kbn/expect';
 // test files must `export default` a function that defines a test suite
 export default function ({ getService, getPageObject }) {
 

package.json

@@ -258,6 +258,7 @@
     "@kbn/es": "1.0.0",
     "@kbn/eslint-import-resolver-kibana": "2.0.0",
     "@kbn/eslint-plugin-eslint": "1.0.0",
+    "@kbn/expect": "1.0.0",
     "@kbn/plugin-generator": "1.0.0",
     "@kbn/test": "1.0.0",
     "@octokit/rest": "^15.10.0",
@@ -346,7 +347,6 @@
     "eslint-plugin-prefer-object-spread": "^1.2.1",
     "eslint-plugin-prettier": "^2.6.2",
     "eslint-plugin-react": "^7.11.1",
-    "expect.js": "0.3.1",
     "faker": "1.1.0",
     "fetch-mock": "7.3.0",
     "geckodriver": "1.12.2",

packages/elastic-datemath/test/index.js

@@ -20,7 +20,7 @@
 import dateMath from '../src/index';
 import moment from 'moment';
 import sinon from 'sinon';
-import expect from 'expect.js';
+import expect from '@kbn/expect';
 
 /**
  * Require a new instance of the moment library, bypassing the require cache.

packages/kbn-dev-utils/package.json

@@ -20,8 +20,8 @@
   },
   "devDependencies": {
     "@kbn/babel-preset": "1.0.0",
+    "@kbn/expect": "1.0.0",
     "babel-cli": "^6.26.0",
-    "chance": "1.0.6",
-    "expect.js": "0.3.1"
+    "chance": "1.0.6"
   }
 }

packages/kbn-es-query/package.json

@@ -22,8 +22,8 @@
     "@babel/preset-typescript": "^7.3.3",
     "@kbn/babel-preset": "1.0.0",
     "@kbn/dev-utils": "1.0.0",
+    "@kbn/expect": "1.0.0",
     "del": "^3.0.0",
-    "expect.js": "0.3.1",
     "getopts": "^2.2.3",
     "supports-color": "^6.1.0",
     "typescript": "^3.3.3333"

packages/kbn-es-query/src/es_query/__tests__/_migrate_filter.js

@@ -17,7 +17,7 @@
  * under the License.
  */
 
-import expect from 'expect.js';
+import expect from '@kbn/expect';
 import _ from 'lodash';
 import { migrateFilter } from '../migrate_filter';
 

packages/kbn-es-query/src/es_query/__tests__/build_es_query.js

@@ -17,7 +17,7 @@
  * under the License.
  */
 
-import expect from 'expect.js';
+import expect from '@kbn/expect';
 import { buildEsQuery } from '../build_es_query';
 import indexPattern from '../../__fixtures__/index_pattern_response.json';
 import { fromKueryExpression, toElasticsearchQuery } from '../../kuery';

packages/kbn-es-query/src/es_query/__tests__/decorate_query.js

@@ -17,7 +17,7 @@
  * under the License.
  */
 
-import expect from 'expect.js';
+import expect from '@kbn/expect';
 import { decorateQuery } from '../decorate_query';
 
 describe('Query decorator', function () {