diff --git a/examples/index.js b/examples/index.js
new file mode 100644
index 0000000..57e7c85
--- /dev/null
+++ b/examples/index.js
@@ -0,0 +1,5 @@
+/* eslint-disable */
+
+function blah() {
+  return true;
+}
diff --git a/examples/test.js b/examples/test.js
new file mode 100644
index 0000000..95857bc
--- /dev/null
+++ b/examples/test.js
@@ -0,0 +1,243 @@
+/* global require ok test deepEqual notDeepEqual equal */
+
+'use strict';
+
+const dir = './';
+const pathInMemory = 'model-inmemory.js';
+const pathServer = 'server.js';
+const pathImage = __dirname;
+const GONE = { status: 'gone' };
+
+const fs = require('fs');
+
+const db = require(dir + pathInMemory);
+
+test(
+  'Check if the `model-inmemory.js` file is loaded correctly.',
+  () => {
+    try {
+      fs.accessSync(dir + 'examples/' + pathInMemory, fs.F_OK);
+      ok(true, pathInMemory + ' is here.');
+    } catch (e) {
+      ok(false, pathInMemory + ' is missing');
+    }
+  },
+);
+
+test(
+  'Check if the `server.js` file is loaded correctly.',
+  () => {
+    try {
+      fs.accessSync(dir + 'examples/' + pathServer, fs.F_OK);
+      ok(true, pathServer + ' is here.');
+    } catch (e) {
+      ok(false, pathServer + ' is missing');
+    }
+  },
+);
+
+test(
+  '`listPictures()`.',
+  () => {
+    deepEqual(
+      db.listPictures(db.title, 'asc'),
+      [
+        { id: 1, title: 'I caught a little fish...', file: '/img/1.png' },
+        { id: 4, title: 'I caught the biggest fish you\'ve ever seen.', file: '/img/4.png' },
+        { id: 3, title: 'The fish I caught was quite big.', file: '/img/3.png' },
+        { id: 2, title: 'The fish I caught was this big.', file: '/img/2.png' },
+      ],
+      'It works in ascending order.',
+    );
+
+    notDeepEqual(
+      db.listPictures(db.title, 'asc'),
+      [
+        { id: 1, title: 'I caught a little fish...', file: '/img/1.png' },
+        { id: 2, title: 'The fish I caught was this big.', file: '/img/2.png' },
+        { id: 4, title: 'I caught the biggest fish you\'ve ever seen.', file: '/img/4.png' },
+        { id: 3, title: 'The fish I caught was quite big.', file: '/img/3.png' },
+      ],
+      'It does not work in ascending order.',
+    );
+
+    deepEqual(
+      db.listPictures(db.title, 'a2z'),
+      [
+        { id: 1, title: 'I caught a little fish...', file: '/img/1.png' },
+        { id: 4, title: 'I caught the biggest fish you\'ve ever seen.', file: '/img/4.png' },
+        { id: 3, title: 'The fish I caught was quite big.', file: '/img/3.png' },
+        { id: 2, title: 'The fish I caught was this big.', file: '/img/2.png' },
+      ],
+      'It works in ascending order.',
+    );
+
+    deepEqual(
+      db.listPictures(db.title, 'desc'),
+      [
+        { id: 2, title: 'The fish I caught was this big.', file: '/img/2.png' },
+        { id: 3, title: 'The fish I caught was quite big.', file: '/img/3.png' },
+        { id: 4, title: 'I caught the biggest fish you\'ve ever seen.', file: '/img/4.png' },
+        { id: 1, title: 'I caught a little fish...', file: '/img/1.png' },
+      ],
+      'It works in descending order.',
+    );
+    deepEqual(
+      db.listPictures(db.title, 'z2a'),
+      [
+        { id: 2, title: 'The fish I caught was this big.', file: '/img/2.png' },
+        { id: 3, title: 'The fish I caught was quite big.', file: '/img/3.png' },
+        { id: 4, title: 'I caught the biggest fish you\'ve ever seen.', file: '/img/4.png' },
+        { id: 1, title: 'I caught a little fish...', file: '/img/1.png' },
+      ],
+    );
+
+    notDeepEqual(
+      db.listPictures(db.title, 'desc'),
+      [
+        { id: 1, title: 'I caught a little fish...', file: '/img/1.png' },
+        { id: 2, title: 'The fish I caught was this big.', file: '/img/2.png' },
+        { id: 4, title: 'I caught the biggest fish you\'ve ever seen.', file: '/img/4.png' },
+        { id: 3, title: 'The fish I caught was quite big.', file: '/img/3.png' },
+      ],
+      'It does not work in descending order.',
+    );
+
+    deepEqual(
+      db.listPictures(db.title),
+      [
+        { id: 4, title: 'I caught the biggest fish you\'ve ever seen.', file: '/img/4.png' },
+        { id: 3, title: 'The fish I caught was quite big.', file: '/img/3.png' },
+        { id: 2, title: 'The fish I caught was this big.', file: '/img/2.png' },
+        { id: 1, title: 'I caught a little fish...', file: '/img/1.png' },
+      ],
+      'The default case works.',
+    );
+
+    deepEqual(
+      db.listPictures(db.title, 'old'),
+      [
+        { id: 1, title: 'I caught a little fish...', file: '/img/1.png' },
+        { id: 2, title: 'The fish I caught was this big.', file: '/img/2.png' },
+        { id: 3, title: 'The fish I caught was quite big.', file: '/img/3.png' },
+        { id: 4, title: 'I caught the biggest fish you\'ve ever seen.', file: '/img/4.png' },
+      ],
+      'It works in order from oldest to newest.',
+    );
+
+    equal(
+      db.listPictures(db.title, 'random').length,
+      4,
+      'Returns the good number of values when random.',
+    );
+    equal(
+      db.listPictures(db.title, 'rnd').length,
+      4,
+    );
+
+    deepEqual(
+      db.listPictures(db.title, 'new'),
+      [
+        { id: 4, title: 'I caught the biggest fish you\'ve ever seen.', file: '/img/4.png' },
+        { id: 3, title: 'The fish I caught was quite big.', file: '/img/3.png' },
+        { id: 2, title: 'The fish I caught was this big.', file: '/img/2.png' },
+        { id: 1, title: 'I caught a little fish...', file: '/img/1.png' },
+      ],
+      'It works in order from newest to oldest.',
+    );
+  },
+);
+
+test(
+  '`uploadPicture()`.',
+  async () => {
+    const picture = {
+      mimetype: 'image/png',
+      filename: 'toDelete',
+      path: pathImage + '/webpages/img/toDelete.png',
+    };
+
+    try {
+      const file = fs.openSync(picture.path, 'w');
+      fs.close(file);
+    } catch (e) {
+      console.log(e);
+    }
+
+    deepEqual(
+      await db.uploadPicture(picture, 'testTitle', 'testAuthor'),
+      { id: 5, title: 'testTitle', file: '/img/toDelete.png' },
+      'The picture was correctly uploaded.',
+    );
+
+    deepEqual(
+      db.listPictures(db.title, 'new'),
+      [
+        { id: 5, title: 'testTitle', file: '/img/toDelete.png' },
+        { id: 4, title: 'I caught the biggest fish you\'ve ever seen.', file: '/img/4.png' },
+        { id: 3, title: 'The fish I caught was quite big.', file: '/img/3.png' },
+        { id: 2, title: 'The fish I caught was this big.', file: '/img/2.png' },
+        { id: 1, title: 'I caught a little fish...', file: '/img/1.png' },
+      ],
+      'The picture is in the memory.',
+    );
+
+    picture.path = 'wrongpath/wrongimage.png';
+    picture.filename = 'wrongimage';
+
+    try {
+      await db.uploadPicture(picture, 'testTitle', 'testAuthor');
+      ok(false, 'It didn\'t throw anything.');
+    } catch (e) {
+      ok(e[0] === 'failed to move incoming file', 'It threw the right exception.');
+    }
+  },
+);
+
+test(
+  '`deletePicture()`.',
+  async () => {
+    await db.deletePicture(5);
+
+    deepEqual(
+      db.listPictures(db.title, 'new'),
+      [
+        { id: 4, title: 'I caught the biggest fish you\'ve ever seen.', file: '/img/4.png' },
+        { id: 3, title: 'The fish I caught was quite big.', file: '/img/3.png' },
+        { id: 2, title: 'The fish I caught was this big.', file: '/img/2.png' },
+        { id: 1, title: 'I caught a little fish...', file: '/img/1.png' },
+      ],
+      'The picture was deleted.',
+    );
+
+    try {
+      await db.deletePicture(6);
+      ok(false, 'It didn\'t throw anything.');
+    } catch (e) {
+      deepEqual(e, GONE, 'It threw the right exception GONE.');
+    }
+
+    const wrongPicture = {
+      mimetype: 'image/png',
+      filename: 'toDelete2',
+      path: pathImage + '/webpages/img/toDelete2.png',
+    };
+
+    try {
+      const file = fs.openSync(wrongPicture.path, 'w');
+      fs.close(file);
+      await db.uploadPicture(wrongPicture, 'testThrowException', 'students');
+      fs.unlinkSync(wrongPicture.path);
+    } catch (e) {
+      console.log(e);
+    }
+
+
+    try {
+      await db.deletePicture(6);
+      ok(false, 'It didn\'t throw anything.');
+    } catch (e) {
+      deepEqual(e[0], 'failed fs delete of ' + wrongPicture.path, 'It threw the right exception FS.');
+    }
+  },
+);
diff --git a/package.json b/package.json
index fdad668..92dec71 100644
--- a/package.json
+++ b/package.json
@@ -8,7 +8,8 @@
     "start": "node examples/server",
     "nodemon": "node_modules/.bin/nodemon -i examples/webpages/ examples/server",
     "forever": "node_modules/.bin/nodemon -i examples/webpages/ examples/server",
-    "initsql": "mysql -u root -p < examples/sql_init.sql"
+    "initsql": "mysql -u root -p < examples/sql_init.sql",
+    "test": "node ./node_modules/qunit/bin/cli.js -c ./examples/index.js -t ./examples/test.js | cat"
   },
   "keywords": [
     "node"
@@ -16,17 +17,28 @@
   "author": "Jacek Kopecky <jacek@jacek.cz> (http://jacek.cz/)",
   "license": "ISC",
   "devDependencies": {
-    "eslint": "^4.12.0",
+    "eslint": "^4.19.1",
     "eslint-config-airbnb": "^16.1.0",
     "eslint-plugin-import": "^2.8.0",
     "eslint-plugin-jsx-a11y": "^6.0.2",
     "eslint-plugin-react": "^7.5.1",
-    "nodemon": "^1.12.1"
+    "nodemon": "^1.12.1",
+    "qnit": "^0.13.0",
+    "qunit": "^0.9.1"
   },
   "repository": "https://github.com/portsoc/ws_api.git",
   "dependencies": {
     "express": "^4.16.2",
     "multer": "^1.3.0",
-    "mysql2": "^1.5.1"
+    "mysql2": "^1.5.1",
+    "node-fetch": "^1.7.3"
+  },
+  "jshintConfig": {
+    "globalstrict": true,
+    "predef": [
+      "QUnit",
+      "window",
+      "document"
+    ]
   }
 }