Update cypress mock methods

client/cypress.e2e.ts

@@ -1,9 +1,21 @@
 import {defineConfig} from 'cypress';
+import {readFileSync} from "fs";
+import {resolve} from "path";
 export default defineConfig( {
   e2e: {
     "baseUrl": "http://localhost:8000",
     specPattern: 'cypress/e2e/e2e/**/*.{spec,cy}.{js,ts}',
     supportFile: 'cypress/support/e2e.ts',
+    setupNodeEvents(on, config) {
+      on('task', {
+        getSchema() {
+          return readFileSync(
+            resolve(__dirname, '../server/schema.graphql'),
+            'utf8'
+          );
+        }
+      });
+    },
   },
   "videoUploadOnPasses": false,
   "reporter": "junit",

client/cypress/support/commands.ts

@@ -67,7 +67,7 @@ declare global {
 // import 'cypress-graphql-mock';
 import mocks from '../fixtures/mocks';
 import {addMocksToSchema} from "@graphql-tools/mock";
-import {graphql} from "graphql";
+import {graphql, GraphQLError} from "graphql";
 
 Cypress.Commands.add('apolloLogin', (username, password) => {
   const payload = {
@@ -150,6 +150,29 @@ Cypress.Commands.add('mockGraphql', (options?: any) => {
       const {operationName, query, variables} = req.body;
       const rootValue = getRootValue(currentOperations, operationName, variables);
 
+      if (!rootValue) {
+        return req;
+      }
+
+      if (
+        // Additional checks here because of transpilation.
+        // We will lose instanceof if we are not using specific babel plugin, or using pure TS to compile front-end
+        rootValue instanceof GraphQLError ||
+        rootValue.constructor === GraphQLError ||
+        rootValue.constructor.name === "GraphQLError"
+      ) {
+        return Promise.resolve()
+          .then(
+            () =>
+              new Response(
+                JSON.stringify({
+                  data: {},
+                  errors: [rootValue]
+                })
+              )
+          );
+      }
+
       graphql({
         schema: schemaWithMocks,
         source: query,