refactor: simplify jest config (#42136)

* refactor: bring api jest tests to root

* refactor: pull client tests to root

* fix: remove ancient curriculum babelrc

* feat: run all jest tests at once

* fix: remove unused babelrcRoot

* chore: remove more jests

jest.config.js

@@ -1,5 +1,26 @@
-// TODO: remove this once /tools/dashboard's tests are configured correctly
-
 module.exports = {
-  testPathIgnorePatterns: ['/node_modules/', '/tools/dashboard']
+  // TODO: remove /tools/dashboard when the tests are configured correctly
+  testPathIgnorePatterns: ['/node_modules/', '/tools/dashboard'],
+  moduleNameMapper: {
+    '\\.(jpg|jpeg|png|svg|woff|woff2)$':
+      '<rootDir>/client/src/__mocks__/fileMock.js',
+    // Plain CSS - match css files that don't end with
+    // '.module.css' https://regex101.com/r/VzwrKH/4
+    '^(?!.*\\.module\\.css$).*\\.css$':
+      '<rootDir>/client/src/__mocks__/styleMock.js',
+    // CSS Modules - match files that end with 'module.css'
+    '\\.module\\.css$': 'identity-obj-proxy',
+    'react-i18next': '<rootDir>/client/src/__mocks__/react-i18nextMock.js',
+    '^lodash-es$': 'lodash'
+  },
+  globals: {
+    __PATH_PREFIX__: ''
+  },
+  verbose: true,
+  transform: {
+    '^.+\\.js$': '<rootDir>/jest.transform.js'
+  },
+  roots: ['.', './client', './api-server'],
+  transformIgnorePatterns: ['node_modules/(?!(gatsby)/)'],
+  setupFilesAfterEnv: ['./jest.setup.js']
 };