install jest

.eslintrc.js

@@ -2,10 +2,11 @@ module.exports = {
   extends: [
     'weseek',
     'weseek/react',
+    "plugin:jest/recommended",
   ],
   env: {
-    mocha: true,
     jquery: true,
+    "jest/globals": true,
   },
   globals: {
     $: true,
@@ -15,7 +16,7 @@ module.exports = {
     window: true,
   },
   plugins: [
-    'chai-friendly',
+    "jest",
   ],
   rules: {
     'indent': [
@@ -35,8 +36,5 @@ module.exports = {
     ],
     // eslint-plugin-import rules
     'import/no-unresolved': [2, { ignore: ['^@'] }], // ignore @alias/..., @commons/..., ...
-    // eslint-plugin-chai-friendly rules
-    'no-unused-expressions': 0,
-    'chai-friendly/no-unused-expressions': 2,
   },
 };

package.json

@@ -147,7 +147,6 @@
     "browser-bunyan": "^1.3.0",
     "browser-sync": "^2.26.3",
     "bunyan-debug": "^2.0.0",
-    "chai": "^4.1.0",
     "cli": "~1.0.1",
     "codemirror": "^5.42.0",
     "colors": "^1.2.5",
@@ -160,13 +159,14 @@
     "eazy-logger": "^3.0.2",
     "eslint": "^5.15.1",
     "eslint-config-weseek": "^1.0.1",
-    "eslint-plugin-chai-friendly": "^0.4.1",
     "eslint-plugin-import": "^2.16.0",
     "eslint-plugin-react": "^7.12.4",
+    "eslint-plugin-jest": "^22.6.4",
     "file-loader": "^4.0.0",
     "handsontable": "^6.0.1",
     "i18next-browser-languagedetector": "^3.0.1",
     "imports-loader": "^0.8.0",
+    "jest": "^24.8.0",
     "jquery-slimscroll": "^1.3.8",
     "jquery-ui": "^1.12.1",
     "jquery.cookie": "~1.4.1",
@@ -184,7 +184,6 @@
     "markdown-table": "^1.1.1",
     "metismenu": "^3.0.3",
     "mini-css-extract-plugin": "^0.7.0",
-    "mocha": "^6.0.1",
     "morgan": "^1.9.0",
     "node-dev": "^4.0.0",
     "node-sass": "^4.11.0",
@@ -210,8 +209,6 @@
     "reveal.js": "^3.5.0",
     "sass-loader": "^7.1.0",
     "simple-load-script": "^1.0.2",
-    "sinon": "^7.2.2",
-    "sinon-chai": "^3.3.0",
     "socket.io-client": "^2.0.3",
     "style-loader": "^0.23.0",
     "stylelint-config-recess-order": "^2.0.1",