Updating write* methods to return offsets, fill to return the Buffer, and making isBuffer a type guard.

node/node-tests.ts

@@ -34,7 +34,7 @@ assert.doesNotThrow(() => {
 fs.writeFile("thebible.txt",
     "Do unto others as you would have them do unto you.",
     assert.ifError);
-    
+
 fs.write(1234, "test");
 
 fs.writeFile("Harry Potter",
@@ -87,6 +87,25 @@ function bufferTests() {
     console.log(Buffer.byteLength('xyz123', 'ascii'));
     var result1 = Buffer.concat([utf8Buffer, base64Buffer]);
     var result2 = Buffer.concat([utf8Buffer, base64Buffer], 9999999);
+
+    // Test that TS 1.6 works with the 'as Buffer' annotation
+    // on isBuffer.
+    var a: Buffer | number;
+    a = new Buffer(10);
+    if (Buffer.isBuffer(a)) {
+        a.writeUInt8(3, 4);
+    }
+
+    // write* methods return offsets.
+    var b = new Buffer(16);
+    var result: number = b.writeUInt32LE(0, 0);
+    result = b.writeUInt16LE(0, 4);
+    result = b.writeUInt8(0, 6);
+    result = b.writeInt8(0, 7);
+    result = b.writeDoubleLE(0, 8);
+
+    // fill returns the input buffer.
+    b.fill('a').fill('b');
 }