chore: move jest configuration to test folder

Author: calvinl

jest.setup.js

@@ -124,7 +124,7 @@
       }
     },
     "test": {
-      "command": "$(npm bin)/jest",
+      "command": "$(npm bin)/jest -c ./test/support/jest.config.js",
       "env": {
         "NODE_ENV": "test"
       }

package.json

@@ -1,9 +1,12 @@
 const { mapValues, mapKeys } = require('lodash');
-const { _moduleAliases } = require('./package.json');
+const { _moduleAliases } = require('../../package.json');
+const escapeStringRegexp = require('escape-string-regexp');
+
+const toRegex = (alias) => `^${escapeStringRegexp(alias)}/(.*)$`;
 
 // Maps _moduleAliases in package.json to Jest's regex format that it can read
 const moduleAliasesMap = mapValues(
-  mapKeys(_moduleAliases, (_, alias) => `${alias}/(.*)$`),
+  mapKeys(_moduleAliases, (_, alias) => toRegex(alias)),
   path => `<rootDir>/${path}/$1`
 );
 
@@ -15,8 +18,10 @@ const staticFiles =
 module.exports = {
   verbose: true,
   moduleFileExtensions: ['js', 'jsx'],
+  rootDir: process.cwd(),
   snapshotSerializers: ['enzyme-to-json/serializer'],
-  setupTestFrameworkScriptFile: '<rootDir>/jest.setup.js',
+  setupTestFrameworkScriptFile: '<rootDir>/test/support/jest.setup.js',
+  globalSetup: '<rootDir>/test/support/jest.globalSetup.js',
   moduleNameMapper: {
     ...moduleAliasesMap,
     [staticFiles]: '<rootDir>/__mocks__/fileMock.js',

jest.config.js renamed to test/support/jest.config.js

@@ -0,0 +1,4 @@
+module.exports = async () => {
+  // This module can be used to do any sort of global setup before tests are
+  // run, such as connecting to or seeding a database.
+};

test/support/jest.globalSetup.js

@@ -0,0 +1,5 @@
+import { configure } from 'enzyme';
+import Adapter from 'enzyme-adapter-react-16';
+
+// configure an adapter for enzyme
+configure({ adapter: new Adapter() });