fix(testing): correctly migrate plugins file if present

packages/cypress/src/generators/migrate-to-cypress-ten/__snapshots__/migrate-to-cypress-ten.spec.ts.snap

@@ -202,7 +202,7 @@ Object {
 exports[`convertToCypressTen convertCypressProject should update project w/customized config 1`] = `
 "import { defineConfig } from 'cypress'
 import { nxE2EPreset } from '@nrwl/cypress/plugins/cypress-preset';
-import setupNodeEvents from './src/plugins/index.js';
+import setupNodeEvents from './src/plugins/index';
 
 const cypressJsonConfig = {
 \\"fileServerFolder\\": \\".\\",

packages/cypress/src/generators/migrate-to-cypress-ten/conversion.util.ts

@@ -344,3 +344,45 @@ export function addConfigToTsConfig(
     );
   }
 }
+
+export function updatePluginFile(
+  tree: Tree,
+  projectConfig: ProjectConfiguration,
+  cypressConfigs: {
+    cypressConfigTs: Record<string, any>;
+    cypressConfigJson: Record<string, any>;
+  }
+) {
+  // if ts file change module.exports = to export default
+  // if js file don't do anything
+  // update cypressConfigTs.e2e to remove file extension
+  const pluginsFile = cypressConfigs.cypressConfigTs?.e2e?.pluginsFile;
+  if (!pluginsFile) {
+    return cypressConfigs;
+  }
+  const ext = extname(pluginsFile);
+  const updatedCypressConfigs = {
+    ...cypressConfigs,
+    cypressConfigTs: {
+      e2e: {
+        ...cypressConfigs.cypressConfigTs.e2e,
+        pluginsFile: pluginsFile.replace(ext, ''),
+      },
+    },
+  };
+
+  const pluginFilePath = joinPathFragments(projectConfig.root, pluginsFile);
+
+  if (ext === '.ts' && tree.exists(pluginFilePath)) {
+    const pluginFileContent = tree.read(pluginFilePath, 'utf-8');
+
+    tree.write(
+      pluginFilePath,
+      pluginFileContent
+        .replace('module.exports =', 'export default')
+        .replace(/module\.exports\.(.*?)=/g, 'export const $1=')
+    );
+  }
+
+  return updatedCypressConfigs;
+}

packages/cypress/src/generators/migrate-to-cypress-ten/migrate-to-cypress-ten.spec.ts

@@ -13,6 +13,7 @@ import { cypressProjectGenerator } from '../cypress-project/cypress-project';
 import {
   createSupportFileImport,
   updateImports,
+  updatePluginFile,
   updateProjectPaths,
 } from './conversion.util';
 import { migrateCypressProject } from './migrate-to-cypress-ten';
@@ -447,4 +448,89 @@ describe('a', () => {
       });
     });
   });
+
+  describe(updatePluginFile.name, () => {
+    it('should update module.exports for ts files', () => {
+      tree.write(
+        'apps/app-e2e/src/plugins/index.ts',
+        `
+function myCoolFunction() {
+  console.log('cool') 
+}
+
+module.exports = function(on, config) {
+  // do stuff
+}
+
+module.exports.blah = myCoolFunction;
+`
+      );
+      const actual = updatePluginFile(
+        tree,
+        { root: 'apps/app-e2e' },
+        {
+          cypressConfigJson: {},
+          cypressConfigTs: { e2e: { pluginsFile: './src/plugins/index.ts' } },
+        }
+      );
+
+      expect(actual.cypressConfigTs.e2e.pluginsFile).toEqual(
+        './src/plugins/index'
+      );
+      expect(tree.read('apps/app-e2e/src/plugins/index.ts', 'utf-8')).toEqual(`
+function myCoolFunction() {
+  console.log('cool') 
+}
+
+export default function(on, config) {
+  // do stuff
+}
+
+export const blah = myCoolFunction;
+`);
+    });
+    it('should not update .js file', () => {
+      const pluginFileContent = `
+function myCoolFunction() {
+  console.log('cool') 
+}
+
+module.exports = function(on, config) {
+  // do stuff
+}
+
+module.exports.blah = myCoolFunction;
+`;
+      tree.write('apps/app-e2e/src/plugins/index.js', pluginFileContent);
+      const actual = updatePluginFile(
+        tree,
+        { root: 'apps/app-e2e' },
+        {
+          cypressConfigJson: {},
+          cypressConfigTs: { e2e: { pluginsFile: './src/plugins/index.js' } },
+        }
+      );
+
+      expect(actual.cypressConfigTs.e2e.pluginsFile).toEqual(
+        './src/plugins/index'
+      );
+      expect(tree.read('apps/app-e2e/src/plugins/index.js', 'utf-8')).toEqual(
+        pluginFileContent
+      );
+    });
+
+    it('should not update if no file is preset', () => {
+      const actual = updatePluginFile(
+        tree,
+        { root: 'apps/app-e2e' },
+        {
+          cypressConfigJson: {},
+          cypressConfigTs: { e2e: { pluginsFile: false } },
+        }
+      );
+
+      expect(actual.cypressConfigTs.e2e.pluginsFile).toBeFalsy();
+      expect(tree.exists('apps/app-e2e/src/plugins/index.ts')).toBeFalsy();
+    });
+  });
 });

packages/cypress/src/generators/migrate-to-cypress-ten/migrate-to-cypress-ten.ts

@@ -4,19 +4,23 @@ import {
   installPackagesTask,
   joinPathFragments,
   logger,
+  ProjectConfiguration,
   readProjectConfiguration,
   stripIndents,
   Tree,
   updateJson,
   updateProjectConfiguration,
 } from '@nrwl/devkit';
 import { forEachExecutorOptions } from '@nrwl/workspace/src/utilities/executor-options-utils';
+import { tsquery } from '@phenomnomnominal/tsquery';
+import { extname } from 'path';
 import { CypressExecutorOptions } from '../../executors/cypress/cypress.impl';
 import { cypressVersion } from '../../utils/versions';
 import {
   addConfigToTsConfig,
   createNewCypressConfig,
   findCypressConfigs,
+  updatePluginFile,
   updateProjectPaths,
   writeNewConfig,
 } from './conversion.util';
@@ -39,13 +43,18 @@ export async function migrateCypressProject(tree: Tree) {
           tree.exists(cypressConfigPathJson) &&
           !tree.exists(cypressConfigPathTs)
         ) {
-          const cypressConfigs = createNewCypressConfig(
+          let cypressConfigs = createNewCypressConfig(
             tree,
             projectConfig,
             cypressConfigPathJson
           );
 
           updateProjectPaths(tree, projectConfig, cypressConfigs);
+          cypressConfigs = updatePluginFile(
+            tree,
+            projectConfig,
+            cypressConfigs
+          );
           writeNewConfig(tree, cypressConfigPathTs, cypressConfigs);
           addConfigToTsConfig(
             tree,