[MD] Validate length of title to be less or equal than 32 characters

Signed-off-by: Zhongnan Su <szhongna@amazon.com>

src/plugins/data_source_management/public/components/validation/datasource_form_validation.test.ts

@@ -40,6 +40,11 @@ describe('DataSourceManagement: Form Validation', () => {
       );
       expect(result).toBe(false);
     });
+    test('should fail validation when title is longer than 32 characters', () => {
+      form.title = 'test'.repeat(10);
+      const result = performDataSourceFormValidation(form, [], '', authenticationMethodRegistry);
+      expect(result).toBe(false);
+    });
     test('should fail validation when endpoint is not valid', () => {
       form.endpoint = mockDataSourceAttributesWithAuth.endpoint;
       const result = performDataSourceFormValidation(form, [], '', authenticationMethodRegistry);

src/plugins/data_source_management/public/components/validation/datasource_form_validation.ts

@@ -50,7 +50,7 @@ export const isTitleValid = (
     error: '',
   };
   /* Title validation */
-  if (!title?.trim?.().length) {
+  if (!title.trim().length) {
     isValid.valid = false;
   } else if (
     title.toLowerCase() !== existingTitle.toLowerCase() &&
@@ -62,6 +62,12 @@ export const isTitleValid = (
     isValid.error = i18n.translate('dataSourcesManagement.validation.titleExists', {
       defaultMessage: 'This title is already in use',
     });
+  } else if (title.length > 32) {
+    /* title length validation */
+    isValid.valid = false;
+    isValid.error = i18n.translate('dataSourcesManagement.validation.titleLength', {
+      defaultMessage: 'Title must be less than 32 characters',
+    });
   }
   return isValid;
 };