Add jest, mock and test example (#58)

* Add jest, mock and test example

* Added test automation on the repo

* Added first part unit test for stock count

* fix: feedback correction and finalise unit test

* fix: conflicts and merge master into here

* fix:contacts forms are removed

* fix: unit test failing

.github/workflows/build.yml

@@ -0,0 +1,25 @@
+name: CI
+
+on: [push]
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    timeout-minutes: 15
+
+    defaults:
+      run:
+        working-directory: .
+
+    strategy:
+      matrix:
+        node-version: [16.x]
+
+    steps:
+    - uses: actions/checkout@v3
+    - name: Use Node.js ${{ matrix.node-version }}
+      uses: actions/setup-node@v3
+      with:
+        node-version: ${{ matrix.node-version }}
+    - run: npm ci
+    - run: npm test

.vscode/launch.json

@@ -0,0 +1,17 @@
+{
+    "version": "0.2.0",
+    "configurations": [
+      {
+        "type": "node",
+        "request": "launch",
+        "name": "Run Jest Tests",
+        "program": "${workspaceFolder}/node_modules/jest/bin/jest.js",
+        "args": [
+          "${workspaceFolder}/test/stock-count.spec.js",
+          "--runInBand",
+          "--verbose"
+        ],
+        "console": "integratedTerminal"
+      }
+    ]
+  }