fix tests & run on github runners

Author: hansmorb

.github/workflows/tests.yml

@@ -0,0 +1,24 @@
+name: Jest Tests
+on:
+    push:
+        branches:
+          - 'master'
+    pull_request:
+        branches:
+            - 'master'
+jobs:
+    test:
+        runs-on: ubuntu-latest
+        strategy:
+            matrix:
+                node-version: [14.x, 16.x, 18.x]
+        steps:
+            - uses: actions/checkout@v3
+            - name: Use Node.js
+              uses: actions/setup-node@v3
+              with:
+                node-version: ${{ matrix['node-version'] }}
+            - name: Test
+              run: |
+                npm install
+                npm run test

tests/litepicker.test.ts

@@ -184,6 +184,7 @@ test('Litepicker date range - setOptions', () => {
     startDate,
     endDate,
     inlineMode: true,
+    onChangeMonth: () => {}
   });
 
   expect(picker.getStartDate().toDateString() === startDate.toDateString()