Refactor specs to use shared variable

spec/frontend/members/store/mutations_spec.js

@@ -44,18 +44,16 @@ describe('Vuex members mutations', () => {
       describe('when error has a message', () => {
         it('shows error message', () => {
           const error = new Error('Request failed with status code 422');
+          const message =
+            'User email "john.smith@gmail.com" does not match the allowed domain of example.com';
+
           error.response = {
-            data: {
-              message:
-                'User email "john.smith@gmail.com" does not match the allowed domain of example.com',
-            },
+            data: { message },
           };
           mutations[types.RECEIVE_MEMBER_ROLE_ERROR](state, { error });
 
           expect(state.showError).toBe(true);
-          expect(state.errorMessage).toBe(
-            'User email "john.smith@gmail.com" does not match the allowed domain of example.com',
-          );
+          expect(state.errorMessage).toBe(message);
         });
       });
     });
@@ -90,18 +88,16 @@ describe('Vuex members mutations', () => {
       describe('when error has a message', () => {
         it('shows error message', () => {
           const error = new Error('Request failed with status code 422');
+          const message =
+            'User email "john.smith@gmail.com" does not match the allowed domain of example.com';
+
           error.response = {
-            data: {
-              message:
-                'User email "john.smith@gmail.com" does not match the allowed domain of example.com',
-            },
+            data: { message },
           };
           mutations[types.RECEIVE_MEMBER_EXPIRATION_ERROR](state, { error });
 
           expect(state.showError).toBe(true);
-          expect(state.errorMessage).toBe(
-            'User email "john.smith@gmail.com" does not match the allowed domain of example.com',
-          );
+          expect(state.errorMessage).toBe(message);
         });
       });
     });