feat: Change the date format display in widget (#1528)

Co-authored-by: Pranav <pranav@chatwoot.com>

app/javascript/shared/helpers/specs/DateHelper.spec.js

@@ -0,0 +1,42 @@
+import { formatDate, formatUnixDate } from '../DateHelper';
+
+describe('#DateHelper', () => {
+  it('should format unix date correctly without dateFormat', () => {
+    expect(formatUnixDate(1576340626)).toEqual('Dec 14, 2019');
+  });
+
+  it('should format unix date correctly without dateFormat', () => {
+    expect(formatUnixDate(1608214031, 'MM/dd/yyyy')).toEqual('12/17/2020');
+  });
+
+  it('should format date', () => {
+    expect(
+      formatDate({
+        date: 'Dec 14, 2019',
+        todayText: 'Today',
+        yesterdayText: 'Yesterday',
+      })
+    ).toEqual('Dec 14, 2019');
+  });
+  it('should format date as today ', () => {
+    expect(
+      formatDate({
+        date: new Date(),
+        todayText: 'Today',
+        yesterdayText: 'Yesterday',
+      })
+    ).toEqual('Today');
+  });
+  it('should format date as yesterday ', () => {
+    const today = new Date();
+    const yesterday = new Date(today);
+    yesterday.setDate(yesterday.getDate() - 1);
+    expect(
+      formatDate({
+        date: yesterday,
+        todayText: 'Today',
+        yesterdayText: 'Yesterday',
+      })
+    ).toEqual('Yesterday');
+  });
+});