Split client and server tests into separate Jest "projects"

- server tests now use the "node" jest environment, removing the
  mongoose warning
- both projects can use their own jest.setup.js file

client/jest.setup.js

@@ -0,0 +1,8 @@
+
+// eslint-disable-next-line import/no-extraneous-dependencies
+import { configure } from 'enzyme';
+// eslint-disable-next-line import/no-extraneous-dependencies
+import Adapter from 'enzyme-adapter-react-16';
+import '@babel/polyfill';
+
+configure({ adapter: new Adapter() });

jest.setup.js

@@ -1,8 +0,0 @@
-import { configure } from 'enzyme'
-import Adapter from 'enzyme-adapter-react-16'
-import '@babel/polyfill'
-import mongoose from 'mongoose'
-
-mongoose.Promise = global.Promise;
-
-configure({ adapter: new Adapter() })

package.json

@@ -13,6 +13,9 @@
     "build:server": "cross-env NODE_ENV=production webpack --config webpack/config.server.js",
     "build:examples": "cross-env NODE_ENV=production webpack --config webpack/config.examples.js",
     "test": "jest",
+    "xxtest": "npm run test:server && npm run test:client",
+    "test:server": "jest server --config=./jest.server.config.js",
+    "test:client": "jest --config=./client/jest.config.js",
     "test:ci": "npm run lint && npm run test",
     "fetch-examples": "cross-env NODE_ENV=development node ./server/scripts/fetch-examples.js",
     "fetch-examples-gg": "cross-env NODE_ENV=development node ./server/scripts/fetch-examples-gg.js",
@@ -36,12 +39,30 @@
     ]
   },
   "jest": {
-    "setupFiles": [
-      "<rootDir>/jest.setup.js"
+    "projects": [
+      {
+        "displayName": "server",
+        "testEnvironment": "node",
+        "setupFilesAfterEnv": [
+          "<rootDir>/server/jest.setup.js"
+        ],
+        "testMatch": [
+          "<rootDir>/server/**/*.test.(js|jsx)"
+        ]
+      },
+      {
+        "displayName": "client",
+        "setupFilesAfterEnv": [
+          "<rootDir>/client/jest.setup.js"
         ],
         "moduleNameMapper": {
           "^.+\\.(jpg|jpeg|png|gif|eot|otf|webp|svg|ttf|woff|woff2|mp4|webm|wav|mp3|m4a|aac|oga)$": "<rootDir>/client/__test__/mocks/fileMock.js"
+        },
+        "testMatch": [
+          "<rootDir>/client/**/*.test.(js|jsx)"
+        ]
       }
+    ]
   },
   "main": "index.js",
   "author": "Cassie Tarakajian",
@@ -80,7 +101,6 @@
     "@svgr/webpack": "^5.4.0",
     "babel-core": "^7.0.0-bridge.0",
     "babel-eslint": "^9.0.0",
-    "babel-jest": "^24.9.0",
     "babel-loader": "^8.0.0",
     "babel-plugin-transform-react-remove-prop-types": "^0.2.12",
     "css-loader": "^3.4.2",
@@ -94,7 +114,7 @@
     "eslint-plugin-react": "^7.18.3",
     "file-loader": "^2.0.0",
     "husky": "^4.2.5",
-    "jest": "^24.9.0",
+    "jest": "^26.0.1",
     "lint-staged": "^10.1.3",
     "mini-css-extract-plugin": "^0.8.2",
     "node-sass": "^4.13.1",

server/jest.setup.js

@@ -0,0 +1,4 @@
+import '@babel/polyfill';
+import mongoose from 'mongoose';
+
+mongoose.Promise = global.Promise;