KDF - Added support for Buffer.compare(buffer1, buffer2)

Readme.md

@@ -1,11 +1,15 @@
 # buffer-compare-polyfill
 
-Polyfills Node v0.10.x with v0.12.x `Buffer.prototype.compare` functionality.
+Polyfills Node v0.10.x with v0.12.x `Buffer.compare` and `Buffer.prototype.compare` functionality.
 
 See [v.12 API Docs](http://nodejs.org/api/buffer.html#buffer_buf_compare_otherbuffer)
 
 ```js
   Buffer('123').compare(Buffer('123')); // 0
   Buffer('123').compare(Buffer('1230')); // -1
   Buffer('1230').compare(Buffer('123')); // 1
+
+  Buffer.compare(Buffer('123'), Buffer('123')); // 0
+  Buffer.compare(Buffer('123'), Buffer('1230')); // -1
+  Buffer.compare(Buffer('1230'), Buffer('123')); // 1
 ```

index.js

@@ -1,5 +1,9 @@
 var compare = require('buffer-compare');
 
+Buffer.compare = Buffer.compare || function (buffer1, buffer2) {
+  return compare(buffer1, buffer2);
+};
+
 Buffer.prototype.compare = Buffer.prototype.compare || function (buffer) {
   return compare(this, buffer);
-}
+};

test.js

@@ -17,3 +17,18 @@ console.log('Passed');
 console.log('should return -1 when there is no match');
 console.assert(A.compare(C) === -1, 'Failed:' + A.compare(C));
 console.log('Passed');
+
+console.log('Buffer.compare : ');
+
+console.log('should return 0 when a byte sequences matches and buffers are of equal length');
+console.assert(Buffer.compare(A, A) === 0, 'Failed:' + Buffer.compare(A, A));
+console.log('Passed');
+console.log('should return 1 when a byte sequence matches and the left buffer is smaller');
+console.assert(Buffer.compare(A, B) === 1, 'Failed:' + Buffer.compare(A, B));
+console.log('Passed');
+console.log('should return 1 when a byte sequence matches and the left buffer is larger');
+console.assert(Buffer.compare(B, A) === -1, 'Failed:' + Buffer.compare(B, A));
+console.log('Passed');
+console.log('should return -1 when there is no match');
+console.assert(Buffer.compare(A, C) === -1, 'Failed:' + Buffer.compare(A, C));
+console.log('Passed');