feat: 🎸 implement basic rename() method, only for files

src/fsa-to-node/FsaNodeFs.ts

@@ -320,6 +320,19 @@ export class FsaNodeFs implements FsCallbackApi, FsCommonObjects {
   public readonly rename: FsCallbackApi['rename'] = (oldPath: misc.PathLike, newPath: misc.PathLike, callback: misc.TCallback<void>): void => {
     const oldPathFilename = pathToFilename(oldPath);
     const newPathFilename = pathToFilename(newPath);
+    const [oldFolder, oldName] = pathToLocation(oldPathFilename);
+    const [newFolder, newName] = pathToLocation(newPathFilename);
+    (async () => {
+      const oldFile = await this.getFile(oldFolder, oldName, 'rename');
+      const newDir = await this.getDir(newFolder, false, 'rename');
+      const newFile = await newDir.getFileHandle(newName, { create: true });
+      const writable = await newFile.createWritable({ keepExistingData: false });
+      const oldData = await oldFile.getFile();
+      await writable.write(await oldData.arrayBuffer());
+      await writable.close();
+      const oldDir = await this.getDir(oldFolder, false, 'rename');
+      await oldDir.removeEntry(oldName);
+    })().then(() => callback(null), error => callback(error));
   };
 
   public readonly exists: FsCallbackApi['exists'] = (

src/fsa-to-node/__tests__/FsaNodeFs.test.ts

@@ -451,3 +451,15 @@ describe('.access()', () => {
     });
   });
 });
+
+describe('.rename()', () => {
+  test('can rename a file', async () => {
+    const { fs, mfs } = setup({ folder: { file: 'test' }, 'empty-folder': null, 'f.html': 'test' });
+    await fs.promises.rename('/folder/file', '/folder/file2');
+    expect(mfs.__vol.toJSON()).toStrictEqual({
+      '/mountpoint/folder/file2': 'test',
+      '/mountpoint/empty-folder': null,
+      '/mountpoint/f.html': 'test',
+    });
+  });
+});