[issue249] fixed Buffer prototype & tests

src/buffer.js

@@ -9,6 +9,11 @@ function FilerBuffer (subject, encoding, nonZero) {
   return new Buffer(subject, encoding, nonZero);
 };
 
+// Inherit prototype from Buffer
+FilerBuffer.prototype = Object.create(Buffer.prototype);
+FilerBuffer.prototype.constructor = FilerBuffer;
+
+// Also copy static methods onto FilerBuffer ctor
 Object.keys(Buffer).forEach(function (p) {
   if (Buffer.hasOwnProperty(p)) {
     FilerBuffer[p] = Buffer[p];

tests/bugs/issue249.js

@@ -12,3 +12,31 @@ describe('Filer.Buffer should accept initialized ArrayBuffers, issue 249', funct
     done();
   });
 });
+
+describe('Filer.Buffer static methods are in tact, issue 249', function() {
+  beforeEach(util.setup);
+  afterEach(util.cleanup);
+
+  it('should proxy Buffer.isBuffer', function(done) {
+    expect(Filer.Buffer.isBuffer(new Filer.Buffer([]))).to.equal(true);
+    expect(Filer.Buffer.isBuffer('')).to.equal(false);
+    done();
+  });
+
+  it('should proxy Buffer.isEncoding', function(done) {
+    expect(Filer.Buffer.isEncoding('utf8')).to.equal(true);
+    expect(Filer.Buffer.isEncoding('smoop')).to.equal(false);
+    done();
+  });
+
+  it('should proxy Buffer.byteLength', function(done) {
+    expect(Filer.Buffer.byteLength('01100111', 'binary')).to.equal(8);
+    done();
+  });
+
+  it('should proxy Buffer.concat', function(done) {
+    expect(Filer.Buffer.concat([new Filer.Buffer(1), new Filer.Buffer(2)]).length).to.equal(3);
+    done();
+  });
+});
+