Fix #576: remove unnecessary methods from fs.promises, adjust tests to match

src/filesystem/interface.js

@@ -265,46 +265,52 @@ function FileSystem(options, callback) {
   });
   FileSystem.prototype.promises = {};
   /**
-   * Public API for FileSystem
+   * Public API for FileSystem. All node.js methods that are
-  */
+   * exposed on fs.promises include `promise: true`.  We also
+   * include our own extra methods, but skip the fd versions
+   * to match node.js, which puts these on a FileHandle object.
+   */
   [
-    'open',
+    { name: 'open', promises: true },
-    'access',
+    { name: 'access', promises: true },
-    'chmod',
+    { name: 'chmod', promises: true },
-    'fchmod',
+    { name: 'fchmod' },
-    'chown',
+    { name: 'chown', promises: true },
-    'fchown',
+    { name: 'fchown' },
-    'close',
+    { name: 'close' },
-    'mknod',
+    { name: 'mknod', promises: true },
-    'mkdir',
+    { name: 'mkdir', promises: true },
-    'rmdir',
+    { name: 'rmdir', promises: true },
-    'stat',
+    { name: 'stat', promises: true },
-    'fstat',
+    { name: 'fstat' },
-    'link',
+    { name: 'link', promises: true },
-    'unlink',
+    { name: 'unlink', promises: true },
-    'read',
+    { name: 'read' },
-    'readFile',
+    { name: 'readFile', promises: true },
-    'write',
+    { name: 'write' },
-    'writeFile',
+    { name: 'writeFile', promises: true },
-    'appendFile',
+    { name: 'appendFile', promises: true },
-    'exists',
+    { name: 'exists' },
-    'lseek',
+    { name: 'lseek' },
-    'readdir',
+    { name: 'readdir', promises: true },
-    'rename',
+    { name: 'rename', promises: true },
-    'readlink',
+    { name: 'readlink', promises: true },
-    'symlink',
+    { name: 'symlink', promises: true },
-    'lstat',
+    { name: 'lstat', promises: true },
-    'truncate',
+    { name: 'truncate', promises: true },
-    'ftruncate',
+    { name: 'ftruncate' },
-    'utimes',
+    { name: 'utimes', promises: true },
-    'futimes',
+    { name: 'futimes' },
-    'setxattr',
+    { name: 'setxattr', promises: true },
-    'getxattr',
+    { name: 'getxattr', promises: true },
-    'fsetxattr',
+    { name: 'fsetxattr' },
-    'fgetxattr',
+    { name: 'fgetxattr' },
-    'removexattr',
+    { name: 'removexattr', promises: true },
-    'fremovexattr'
+    { name: 'fremovexattr' }
-  ].forEach(function(methodName) {
+  ].forEach(function(method) {
+    var methodName = method.name;
+    var shouldPromisify = method.promises === true;
+
     FileSystem.prototype[methodName] = function() {
       var fs = this;
       var args = Array.prototype.slice.call(arguments, 0);
@@ -349,7 +355,10 @@ function FileSystem(options, callback) {
       }
     };
     
-    FileSystem.prototype.promises[methodName] = promisify(FileSystem.prototype[methodName].bind(fs));
+    // Add to fs.promises if appropriate
+    if(shouldPromisify) {
+      FileSystem.prototype.promises[methodName] = promisify(FileSystem.prototype[methodName].bind(fs));
+    }
   });
 
 }

tests/spec/fs.chmod.spec.js

@@ -112,36 +112,3 @@ describe('fsPromise.chmod', function() {
       .catch( err => { throw err; });
   });
 });
-
-describe('fsPromise.fchmod', function() {
-  beforeEach(util.setup);
-  afterEach(util.setup);
-
-  it('should be a function', function() {
-    var fsPromise = util.fs().promises;
-    expect(typeof fsPromise.fchmod).to.equal('function');
-  });
-
-  it('should be a promise', function() {
-    var fsPromise = util.fs().promises;
-    expect(fsPromise.fchmod()).to.be.a('Promise');
-  });
-
-  it('should allow for updating mode of a given file', function() {
-    var fsPromise = util.fs().promises;
-    var fdesc;
-
-    return fsPromise.open('/file', 'w')
-      .then( fd => {
-        fdesc = fd;
-        return fsPromise.fchmod(fd, 0o777);
-      })
-      .then( () => {
-        return fsPromise.fstat(fdesc);
-      })
-      .then( stats => {
-        expect(stats.mode & 0o777).to.equal(0o777);
-      })
-      .catch( err => { throw err; });
-  });
-});

tests/spec/fs.read.spec.js

@@ -103,87 +103,3 @@ describe('fs.read', function() {
     });
   });
 });
-
-describe('fs.promises.read', function() {
-  beforeEach(util.setup);
-  afterEach(util.cleanup);
-
-  it('should be a function', function() {
-    var fsPromises = util.fs().promises;
-    expect(fsPromises.read).to.be.a('function');
-  });
-
-  it('should return a promise', function() {
-    var fsPromises = util.fs().promises;
-    expect(fsPromises.read()).to.be.a('Promise');
-  });
-  it('should read data from a file', function() {
-    var fsPromises = util.fs().promises;
-    var wbuffer = new Filer.Buffer([1, 2, 3, 4, 5, 6, 7, 8]);
-    var rbuffer = new Filer.Buffer(wbuffer.length);
-    var fdesc;
-    rbuffer.fill(0);
-
-    return fsPromises.open('/myfile', 'w+')
-      .then((fd)=>{
-        fdesc=fd;
-        return fsPromises.write(fd, wbuffer, 0, wbuffer.length, 0);
-      })
-      .then((result)=>{
-        expect(result).to.equal(wbuffer.length);
-        return fsPromises.read(fdesc, rbuffer,0,rbuffer.length,0);
-      })
-      .then((result)=>{
-        expect(result).to.equal(rbuffer.length);
-        expect(wbuffer).to.deep.equal(rbuffer);
-      })
-    ;
-  });
-
-  it('should update the current file position', function() {
-    var fsPromises = util.fs().promises;
-    var wbuffer = new Filer.Buffer([1, 2, 3, 4, 5, 6, 7, 8]);
-    var rbuffer = new Filer.Buffer(wbuffer.length);
-    rbuffer.fill(0);
-    var _result = 0;
-    var fdesc;
-
-    return fsPromises.open('/myfile', 'w+')
-      .then((fd)=>{
-        fdesc=fd;
-        return fsPromises.write(fd, wbuffer, 0, wbuffer.length, 0 );
-      })
-      .then((result)=>{
-        expect(result).to.equal(wbuffer.length);
-        return fsPromises.read(fdesc, rbuffer, 0, rbuffer.length / 2, undefined);
-      })
-      .then((result)=>{
-        _result += result;
-        return fsPromises.read(fdesc,rbuffer,rbuffer.length / 2, rbuffer.length, undefined);
-      })
-      .then((result)=>{
-        _result+=result;
-        expect(_result).to.equal(rbuffer.length);
-        expect(wbuffer).to.deep.equal(rbuffer);
-      })
-    ;
-  });
-
-  it('should fail to read a directory', function() {
-    var fsPromises = util.fs().promises;
-    var buf = new Filer.Buffer(20);
-    var buf2 = new Filer.Buffer(20);
-    buf.fill(0);
-    buf2.fill(0);
-
-    return fsPromises.mkdir('/mydir')
-      .then(()=>fsPromises.open('/mydir', 'r'))
-      .then(fd=>fsPromises.read(fd, buf, 0, buf.length, 0))
-      .catch((error)=>{
-        expect(error).to.exist;
-        expect(error.code).to.equal('EISDIR');
-        expect(buf).to.deep.equal(buf2);
-      })
-    ;
-  });
-});

tests/spec/fs.readdir.spec.js

@@ -96,8 +96,7 @@ describe('fsPromises.readdir', function() {
   it('should return an error if the path is a file', function() {
     var fsPromises = util.fs().promises;
 
-    return fsPromises.open('/myfile', 'w')
+    return fsPromises.writeFile('/myfile', 'contents')
-      .then(fd => fsPromises.close(fd))
       .then(() => fsPromises.readdir('/myfile'))
       .catch(error => {
         expect(error).to.exist;

tests/spec/fs.utimes.spec.js

@@ -78,18 +78,6 @@ describe('fs.utimes', function() {
     });
   });
 
-  it('should error when file descriptor is invalid', function(done) {
-    var fs = util.fs();
-    var atime = Date.parse('1 Oct 2000 15:33:22');
-    var mtime = Date.parse('30 Sep 2000 06:43:54');
-
-    fs.futimes(1, atime, mtime, function (error) {
-      expect(error).to.exist;
-      expect(error.code).to.equal('EBADF');
-      done();
-    });
-  });
-
   it('should change atime and mtime of a file path', function(done) {
     var fs = util.fs();
     var atime = Date.parse('1 Oct 2000 15:33:22');
@@ -110,28 +98,6 @@ describe('fs.utimes', function() {
     });
   });
 
-  it ('should change atime and mtime for a valid file descriptor', function(done) {
-    var fs = util.fs();
-    var ofd;
-    var atime = Date.parse('1 Oct 2000 15:33:22');
-    var mtime = Date.parse('30 Sep 2000 06:43:54');
-
-    fs.open('/testfile', 'w', function (error, result) {
-      if (error) throw error;
-
-      ofd = result;
-      fs.futimes(ofd, atime, mtime, function (error) {
-        expect(error).not.to.exist;
-
-        fs.fstat(ofd, function (error, stat) {
-          expect(error).not.to.exist;
-          expect(stat.mtime).to.equal(mtime);
-          done();
-        });
-      });
-    });
-  });
-
   it('should update atime and mtime of directory path', function(done) {
     var fs = util.fs();
     var atime = Date.parse('1 Oct 2000 15:33:22');
@@ -237,18 +203,6 @@ describe('fs.promises.utimes', function () {
       });
   });
 
-  it('should error when file descriptor is invalid', function () {
-    var fs = util.fs().promises;
-    var atime = Date.parse('1 Oct 2000 15:33:22');
-    var mtime = Date.parse('30 Sep 2000 06:43:54');
-
-    return fs.futimes(1, atime, mtime)
-      .catch(function (error) {
-        expect(error).to.exist;
-        expect(error.code).to.equal('EBADF');
-      });
-  });
-
   it('should change atime and mtime of a file path', function () {
     var fs = util.fs().promises;
     var atime = Date.parse('1 Oct 2000 15:33:22');
@@ -275,34 +229,6 @@ describe('fs.promises.utimes', function () {
       });
   });
 
-  it('should change atime and mtime for a valid file descriptor', function () {
-    var fs = util.fs().promises;
-    var ofd;
-    var atime = Date.parse('1 Oct 2000 15:33:22');
-    var mtime = Date.parse('30 Sep 2000 06:43:54');
-
-    return fs.open('/testfile', 'w')
-      .then(function (result) {
-        ofd = result;
-        fs.futimes(ofd, atime, mtime)
-          .then(function () {
-            fs.fstat(ofd)
-              .then(function (stat) {
-                expect(stat.mtime).to.equal(mtime);
-              })
-              .catch(function (error) {
-                expect(error).not.to.exist;
-              });
-          })
-          .catch(function (error) {
-            expect(error).not.to.exist;
-          });
-      })
-      .catch(function (error) {
-        throw error;
-      });
-  });
-
   it('should update atime and mtime of directory path', function () {
     var fs = util.fs().promises;
     var atime = Date.parse('1 Oct 2000 15:33:22');