fix: used regular expressions and added a clear mocking function

src/utils/errorHandler.test.tsx

@@ -21,7 +21,11 @@ describe('Test if errorHandler is working properly', () => {
     return key;
   };
 
-  it('should call toast.error with the correct message if error message is "Failed to fetch"', () => {
+  beforeEach(() => {
+    jest.clearAllMocks();
+  });
+
+  it('should call toast.error with the correct message if error message is "Failed to fetch"', async () => {
     const error = new Error('Failed to fetch');
     errorHandler(t, error);
 
@@ -31,7 +35,7 @@ describe('Test if errorHandler is working properly', () => {
   it('should call toast.error with the correct message if error message contains this substring "Value is not a valid phone number"', () => {
     const error = new Error('This value is not a valid phone number');
     errorHandler(t, error);
-
+    console.log(toast.error);
     expect(toast.error).toHaveBeenCalledWith(tErrors('invalidPhoneNumber'));
   });
 

src/utils/errorHandler.tsx

@@ -5,23 +5,23 @@ import i18n from './i18n';
 /** 
   This function is used to handle api errors in the application.
   It takes in the error object and displays the error message to the user.
-  If the error is due to the Talawa API being unavailable, it displays a custom message.
+  If the error is due to the Talawa API being unavailable, it displays a custom message. And for other error cases, it is using regular expression (case-insensitive) to match and show valid messages
 */
 export const errorHandler = (a: unknown, error: unknown): void => {
   const tErrors: TFunction = i18n.getFixedT(null, 'errors');
   if (error instanceof Error) {
     const errorMessage = error.message;
     if (errorMessage === 'Failed to fetch') {
       toast.error(tErrors('talawaApiUnavailable'));
-    } else if (errorMessage.includes('Value is not a valid phone number')) {
+    } else if (errorMessage.match(/value is not a valid phone number/i)) {
       toast.error(tErrors('invalidPhoneNumber'));
-    } else if (errorMessage.includes('does not exist in "EducationGrade"')) {
+    } else if (errorMessage.match(/does not exist in "EducationGrade"/i)) {
       toast.error(tErrors('invalidEducationGrade'));
-    } else if (errorMessage.includes('does not exist in "EmploymentStatus"')) {
+    } else if (errorMessage.match(/does not exist in "EmploymentStatus"/i)) {
       toast.error(tErrors('invalidEmploymentStatus'));
-    } else if (errorMessage.includes('does not exist in "MaritalStatus"')) {
+    } else if (errorMessage.match(/does not exist in "MaritalStatus"/i)) {
       toast.error(tErrors('invalidMaritalStatus'));
-    } else if (errorMessage.includes('status code 400')) {
+    } else if (errorMessage.match(/status code 400/i)) {
       toast.error(tErrors('error400'));
     } else {
       toast.error(errorMessage);