Tests: Start implementing tests

Only convertDateToISOString for now

.github/workflows/run_node_tests.yml

@@ -0,0 +1,18 @@
+name: discord bot tests
+
+on: [push]
+
+jobs:
+  discord_bot_tests:
+    runs-on: node
+    name: discord bot tests
+    steps:
+    - uses: actions/checkout@v4
+    - name: Use Node.js
+      uses: actions/setup-node@v4
+      with:
+        node-version: 'latest'
+    - name: install dependencies
+      run: npm install
+    - name: run tests
+      run: npm test 

package.json

@@ -15,12 +15,15 @@
     "valid-url": "^1.0.9"
   },
   "scripts": {
-    "test": "echo \"Error: no test specified\" && exit 1"
+    "test": "jest"
   },
   "repository": {
     "type": "git",
     "url": "git+https://github.com/SileNce5k/discord_bot.git"
   },
   "author": "SileNce5k",
-  "license": "UNLICENSE"
+  "license": "UNLICENSE",
+  "devDependencies": {
+    "jest": "^29.7.0"
+  }
 }

tests/convertDateToISOString.test.js

@@ -0,0 +1,12 @@
+const convertDateToISOString = require('../util/convertDateToISOString');
+
+
+let dates = [new Date("2020-01-01"), new Date(0), new Date(5600000), new Date(1000200000000)]
+let expectedDateStrings = ["2020-01-01 00:00:00", "1970-01-01 00:00:00", "1970-01-01 01:33:20", "2001-09-11 09:20:00"]
+for (let i = 0; i < dates.length; i++) {
+
+    test('Converts to human readable date string', () => {
+            expect(convertDateToISOString(dates[i])).toBe(expectedDateStrings[i]);
+    });
+
+}