no promise chaining

code/lib/builder-manager/src/utils/files.ts

@@ -12,7 +12,8 @@ export async function readOrderedFiles(
       // convert deeply nested paths to a single level, also remove special characters
       const { location, url } = sanitizePath(file, addonsDir);
 
-      await fs.ensureFile(location).then(() => fs.writeFile(location, file.contents));
+      await fs.ensureFile(location);
+      await fs.writeFile(location, file.contents);
       return url;
     }) || []
   );

code/lib/core-server/src/core-presets.test.ts

@@ -53,15 +53,15 @@ jest.mock('@storybook/telemetry', () => ({
 }));
 jest.mock('fs-extra', () => ({
   copy: jest.fn(() => undefined),
-  ensureFile: jest.fn(() => undefined),
-  writeFile: jest.fn(() => undefined),
-  readFile: jest.fn((f) => ''),
   emptyDir: jest.fn(() => undefined),
-  ensureDir: jest.fn(() => undefined),
-  writeJSON: jest.fn(() => undefined),
-  remove: jest.fn(() => undefined),
-  readJSON: jest.fn(() => ({})),
+  ensureDir: jest.fn(() => true),
+  ensureFile: jest.fn(() => undefined),
   pathExists: jest.fn(() => true),
+  readFile: jest.fn((f) => ''),
+  readJSON: jest.fn(() => ({})),
+  remove: jest.fn(() => undefined),
+  writeFile: jest.fn(() => undefined),
+  writeJSON: jest.fn(() => undefined),
 }));
 
 jest.mock('./utils/StoryIndexGenerator', () => {