minor provider code modifications

kafka-ui-react-app/src/lib/dateTimeHelpers.ts

@@ -6,14 +6,15 @@ export const formatTimestamp = (
     return '';
   }
 
+  // empty array gets the default one from the browser
   const date = new Date(timestamp);
 
-  try {
-    // empty array gets the default one from the browser
-    return date.toLocaleString([], format);
-  } catch (e) {
+  // invalid date
+  if (Number.isNaN(date.getTime())) {
     return '';
   }
+
+  return date.toLocaleString([], format);
 };
 
 export const formatMilliseconds = (input = 0) => {

kafka-ui-react-app/src/lib/hooks/__tests__/dateTimeHelpers.spec.ts

@@ -0,0 +1,23 @@
+import { formatTimestamp } from 'lib/dateTimeHelpers';
+
+describe('dateTimeHelpers', () => {
+  describe('formatTimestamp', () => {
+    it('should check the empty case', () => {
+      expect(formatTimestamp('')).toBe('');
+    });
+
+    it('should check the invalid case', () => {
+      expect(formatTimestamp('invalid')).toBe('');
+    });
+
+    it('should output the correct date', () => {
+      const date = new Date();
+      expect(formatTimestamp(date)).toBe(
+        date.toLocaleString([], { hour12: false })
+      );
+      expect(formatTimestamp(date.getTime())).toBe(
+        date.toLocaleString([], { hour12: false })
+      );
+    });
+  });
+});