docs: update README

README.md

@@ -12,7 +12,9 @@ Answers to [openfullstack.com](https://fullstackopen.com) course exercises from
 - [Exercises 4.3.-4.7.](https://fullstackopen.com/en/part4/structure_of_backend_application_introduction_to_testing#exercises-4-3-4-7)
   _Details solutions: [4.3](https://github.com/patchamama/fullstackopen-part4-bloglist/commit/0f1a759e78310de711531ed481917496e2f50ec8) | [4.4](https://github.com/patchamama/fullstackopen-part4-bloglist/commit/2585dc72841e8382123fa481aa149d19dd611482) | [4.5](https://github.com/patchamama/fullstackopen-part4-bloglist/commit/4fd94b8779e33ea32b3703a6e6a823291d247e0c) | [4.6](https://github.com/patchamama/fullstackopen-part4-bloglist/commit/c9d554cf41d5cbe5992fd2e2005564fab816d8ad) | [4.7](https://github.com/patchamama/fullstackopen-part4-bloglist/commit/27b41a689bf77cb20a9853fb4f7eaaa998262022)_
 
-### Test can be execute:
+_The exercise 4.7 was done with [lodash library](https://github.com/patchamama/fullstackopen-part4-bloglist/commit/27b41a689bf77cb20a9853fb4f7eaaa998262022) and [without additonal libraries](https://github.com/patchamama/fullstackopen-part4-bloglist/commit/e402cbc35bd3566eb016a75641c9401e53eb5a37)_
+
+### Tests can be execute as follow:
 
 ```
 npm test

package.json

@@ -4,9 +4,9 @@
   "description": "Answers to part4 of fullstackopen course",
   "main": "node index.js",
   "scripts": {
-    "start": "node index.js",
-    "dev": "nodemon index.js",
-    "test": "jest --verbose",
+    "start": "cross-env NODE_ENV=production node index.js",
+    "dev": "cross-env NODE_ENV=development nodemon index.js",
+    "test": "cross-env NODE_ENV=test jest --verbose --runInBand",
     "lint": "eslint ."
   },
   "repository": {
@@ -23,13 +23,15 @@
     "cors": "2.8.5",
     "dotenv": "16.3.1",
     "express": "4.18.2",
-    "lodash": "^4.17.21",
+    "lodash": "4.17.21",
     "mongoose": "7.5.0"
   },
   "devDependencies": {
+    "cross-env": "7.0.3",
     "eslint": "8.49.0",
-    "jest": "^29.6.4",
-    "nodemon": "3.0.1"
+    "jest": "29.6.4",
+    "nodemon": "3.0.1",
+    "supertest": "6.3.3"
   },
   "jest": {
     "testEnvironment": "node"

utils/config.js

@@ -1,7 +1,10 @@
 require('dotenv').config()
 
 const PORT = process.env.PORT
-const MONGODB_URI = process.env.MONGODB_URI
+let MONGODB_URI = process.env.MONGODB_URI
+if (process.env.NODE_ENV === 'test') {
+  MONGODB_URI = process.env.TEST_MONGODB_URI
+}
 
 module.exports = {
   MONGODB_URI,