add optional "caseInsensitivity" for volume - to reproduce windows behaviour

package.json

@@ -61,7 +61,7 @@
     "demo:webfs": "webpack serve --config ./src/webfs/webpack.config.js",
     "prettier": "prettier --ignore-path .gitignore --write \"src/**/*.{ts,js}\"",
     "prettier:diff": "prettier -l \"src/**/*.{ts,js}\"",
-    "test": "jest --maxWorkers 2",
+    "test": "jest",
     "test:coverage": "jest --coverage",
     "test:watch": "jest --watch",
     "tslint": "tslint \"src/**/*.ts\" -t verbose",

src/__tests__/volume.test.ts

@@ -786,7 +786,7 @@ describe('volume', () => {
       });
     });
     describe('.symlink(target, path[, type], callback)', () => {
-      xit('...', () => {});
+      xit('...', () => { });
     });
     describe('.realpathSync(path[, options])', () => {
       const vol = new Volume();
@@ -899,7 +899,7 @@ describe('volume', () => {
       });
     });
     describe('.lstat(path, callback)', () => {
-      xit('...', () => {});
+      xit('...', () => { });
     });
     describe('.statSync(path)', () => {
       const vol = new Volume();
@@ -944,7 +944,7 @@ describe('volume', () => {
       });
     });
     describe('.stat(path, callback)', () => {
-      xit('...', () => {});
+      xit('...', () => { });
     });
     describe('.fstatSync(fd)', () => {
       const vol = new Volume();
@@ -992,7 +992,7 @@ describe('volume', () => {
       });
     });
     describe('.fstat(fd, callback)', () => {
-      xit('...', () => {});
+      xit('...', () => { });
     });
     describe('.linkSync(existingPath, newPath)', () => {
       const vol = new Volume();
@@ -1012,7 +1012,7 @@ describe('volume', () => {
       });
     });
     describe('.link(existingPath, newPath, callback)', () => {
-      xit('...', () => {});
+      xit('...', () => { });
     });
     describe('.readdirSync(path)', () => {
       it('Returns simple list', () => {
@@ -1039,7 +1039,7 @@ describe('volume', () => {
       });
     });
     describe('.readdir(path, callback)', () => {
-      xit('...', () => {});
+      xit('...', () => { });
     });
     describe('.readlinkSync(path[, options])', () => {
       it('Simple symbolic link to one file', () => {
@@ -1087,7 +1087,7 @@ describe('volume', () => {
       });
     });
     describe('.ftruncate(fd[, len], callback)', () => {
-      xit('...', () => {});
+      xit('...', () => { });
     });
     describe('.truncateSync(path[, len])', () => {
       const vol = new Volume();
@@ -1114,7 +1114,7 @@ describe('volume', () => {
       });
     });
     describe('.truncate(path[, len], callback)', () => {
-      xit('...', () => {});
+      xit('...', () => { });
     });
     describe('.utimesSync(path, atime, mtime)', () => {
       const vol = new Volume();
@@ -1134,7 +1134,7 @@ describe('volume', () => {
       });
     });
     describe('.utimes(path, atime, mtime, callback)', () => {
-      xit('...', () => {});
+      xit('...', () => { });
     });
     describe('.mkdirSync(path[, options])', () => {
       it('Create dir at root', () => {
@@ -1180,8 +1180,8 @@ describe('volume', () => {
       });
     });
     describe('.mkdir(path[, mode], callback)', () => {
-      xit('...', () => {});
-      xit('Create /dir1/dir2/dir3', () => {});
+      xit('...', () => { });
+      xit('Create /dir1/dir2/dir3', () => { });
     });
     describe('.mkdtempSync(prefix[, options])', () => {
       it('Create temp dir at root', () => {
@@ -1200,14 +1200,14 @@ describe('volume', () => {
       });
     });
     describe('.mkdtemp(prefix[, options], callback)', () => {
-      xit('Create temp dir at root', () => {});
+      xit('Create temp dir at root', () => { });
       it('throws when prefix is not a string', () => {
         const vol = new Volume();
-        expect(() => vol.mkdtemp({} as string, () => {})).toThrow(TypeError);
+        expect(() => vol.mkdtemp({} as string, () => { })).toThrow(TypeError);
       });
       it('throws when prefix contains null bytes', () => {
         const vol = new Volume();
-        expect(() => vol.mkdtemp('/tmp-\u0000', () => {})).toThrow(/path.+string.+null bytes/i);
+        expect(() => vol.mkdtemp('/tmp-\u0000', () => { })).toThrow(/path.+string.+null bytes/i);
       });
     });
     describe('.rmdirSync(path)', () => {
@@ -1226,7 +1226,7 @@ describe('volume', () => {
       });
     });
     describe('.rmdir(path, callback)', () => {
-      xit('Remove single dir', () => {});
+      xit('Remove single dir', () => { });
       it('Async remove dir /dir1/dir2/dir3 recursively', done => {
         const vol = new Volume();
         vol.mkdirSync('/dir1/dir2/dir3', { recursive: true });
@@ -1370,7 +1370,7 @@ describe('volume', () => {
           vol.writeFileSync('/lol.txt', '2');
         }, 1);
       });
-      xit('Multiple listeners for one file', () => {});
+      xit('Multiple listeners for one file', () => { });
     });
     describe('.unwatchFile(path[, listener])', () => {
       it('Stops watching before .writeFile', done => {
@@ -1421,4 +1421,32 @@ describe('volume', () => {
       expect(new StatWatcher(vol).vol).toBe(vol);
     });
   });
+  describe('caseSensitive: false', () => {
+    it('is case insensitive', () => {
+      const vol = new Volume(undefined, false);
+      vol.mkdirSync('/dir');
+      vol.writeFileSync('/Dir/Foo.txt', 'foo');
+      expect(vol.readFileSync('/dir/foo.TXT', { encoding: 'utf8' })).toBe('foo');
+      vol.unlinkSync('/dir/foo.txt');
+      expect(vol.existsSync('/Dir/Foo.txt')).toBe(false)
+    });
+    it('preserve original filename casing', () => {
+      const vol = new Volume(undefined, false);
+      vol.mkdirSync('/dir/lchild', { recursive: true });
+      vol.mkdirSync('/Dir/UCHILD', { recursive: true });
+
+      expect(vol.readdirSync('/', { encoding: 'utf8' })).toEqual(['dir']);
+      expect(vol.readdirSync('/dIr/lChIlD', { encoding: 'utf8' })).toEqual([]);
+      expect(vol.readdirSync('/DiR/uChIld', { encoding: 'utf8' })).toEqual([]);
+
+      vol.writeFileSync('/DiR/lChIlD/foo.txt', 'lfoo');
+      vol.writeFileSync('/dIr/uChIlD/FOO.txt', 'UFOO');
+
+      expect(vol.readdirSync('/dIr/lChIlD', { encoding: 'utf8' })).toEqual(["foo.txt"]);
+      expect(vol.readdirSync('/DiR/uChIld', { encoding: 'utf8' })).toEqual(["FOO.txt"]);
+
+      expect(vol.readFileSync('/DiR/lChIlD/FoO.TXT', { encoding: 'utf8' })).toBe('lfoo');
+      expect(vol.readFileSync('/dIr/UcHiLd/fOo.TXT', { encoding: 'utf8' })).toBe('UFOO');
+    });
+  });
 });

src/node.ts

@@ -371,7 +371,7 @@ export class Link extends EventEmitter {
   }
 
   setChild(name: string, link: Link = new Link(this.vol, this, name)): Link {
-    this.children.set(name, link);
+    this.children.set(this.vol.caseSensitive ? name : name.toLowerCase(), link)
     link.parent = this;
     this.length++;
 
@@ -393,16 +393,19 @@ export class Link extends EventEmitter {
       link.children.delete('..');
       this.getNode().nlink--;
     }
-    this.children.delete(link.getName());
+    let name = link.getName();
+
+    this.children.delete(this.vol.caseSensitive ? name : name.toLowerCase());
     this.length--;
 
     this.getNode().mtime = new Date();
     this.emit('child:delete', link, this);
   }
 
   getChild(name: string): Link | undefined {
+    const tmp = !this.vol.caseSensitive ? name = name.toLowerCase() : name;
     this.getNode().mtime = new Date();
-    return this.children.get(name);
+    return this.children.get(tmp);
   }
 
   getPath(): string {

src/volume.ts

@@ -122,7 +122,7 @@ export type TFlagsCopy =
 // ---------------------------------------- Options
 
 // Options for `fs.appendFile` and `fs.appendFileSync`
-export interface IAppendFileOptions extends opts.IFileOptions {}
+export interface IAppendFileOptions extends opts.IFileOptions { }
 
 // Options for `fs.watchFile`
 export interface IWatchFileOptions {
@@ -284,6 +284,8 @@ export class Volume implements FsCallbackApi, FsSynchronousApi {
   // Current number of open files.
   openFiles = 0;
 
+  caseSensitive: boolean;
+
   StatWatcher: new () => StatWatcher;
   ReadStream: new (...args) => misc.IReadStream;
   WriteStream: new (...args) => IWriteStream;
@@ -302,9 +304,10 @@ export class Volume implements FsCallbackApi, FsSynchronousApi {
     return this.promisesApi;
   }
 
-  constructor(props = {}) {
+  constructor(props = {}, caseSensitive = true) {
     this.props = Object.assign({ Node, Link, File }, props);
 
+    this.caseSensitive = caseSensitive;
     const root = this.createLink();
     root.setNode(this.createNode(true));
 
@@ -1483,11 +1486,12 @@ export class Volume implements FsCallbackApi, FsSynchronousApi {
     }
 
     const list: TDataOut[] = [];
-    for (const name of link.children.keys()) {
-      if (name === '.' || name === '..') {
+    for (const [childName, childLink] of link.children.entries()) {
+      if (childLink === undefined || childName === '.' || childName === '..') {
         continue;
       }
-      list.push(strToEncoding(name, options.encoding));
+
+      list.push(strToEncoding(this.caseSensitive ? childName : childLink.getName(), options.encoding));
     }
 
     if (!isWin && options.encoding !== 'buffer') list.sort();
@@ -2243,7 +2247,7 @@ export interface IWriteStream extends Writable {
   bytesWritten: number;
   path: string;
   pending: boolean;
-  new (path: PathLike, options: opts.IWriteStreamOptions);
+  new(path: PathLike, options: opts.IWriteStreamOptions);
   open();
   close();
 }