fix: auth interceptor reading status if undefined

When an error occurred in an axios request before the request was even
sent, i.e. when a request interceptor causes an error, the
authInterceptor causes an error as it tries to read the property status.

Fixed authInterceptor to accept errors without response.

src/utils.ts

@@ -12,8 +12,8 @@ export function getXSRFToken(): string {
  * Axios interceptor to automatically log the user out in the Redux store
  * when the request you sent returns a 401 Not Authenticated.
  */
-export function authInterceptor(error: { response: { status: number } }) {
-  if (error.response.status === 401) {
+export function authInterceptor(error: { response?: { status: number } }) {
+  if (error.response?.status === 401) {
     getService().logout();
   }
 

tests/utils.test.ts

@@ -35,6 +35,23 @@ describe('authInterceptor', () => {
 
     expect(logoutSpy).toBeCalledTimes(0);
   });
+
+  it('should not call logout when error has no response (when axios errors occur before sending request)', async () => {
+    expect.assertions(1);
+
+    const logoutSpy = jest.fn();
+    jest.spyOn(config, 'getService').mockReturnValue({
+      login: jest.fn(),
+      subscribe: jest.fn(),
+      unsubscribe: jest.fn(),
+      getState: jest.fn(),
+      logout: logoutSpy
+    });
+
+    await authInterceptor({}).catch(() => undefined);
+
+    expect(logoutSpy).toBeCalledTimes(0);
+  });
 });
 
 describe('authFetch', () => {