Implement Filler

felixge · felixge · commit 35ae21b7417c · 2011-12-29T17:36:47.000+01:00
diff --git a/lib/protocol/types/Filler.js b/lib/protocol/types/Filler.js
@@ -0,0 +1,13 @@
+// "(filler) always 0x00"
+// -- http://forge.mysql.com/wiki/MySQL_Internals_ClientServer_Protocol#Handshake_Initialization_Packet
+
+module.exports = Filler;
+function Filler(length) {
+  this.length = length;
+}
+
+Filler.prototype.copy = function(buffer, offset) {
+  for (var i = 0; i < this.length; i++) {
+    buffer[i + offset] = 0x00;
+  }
+};
diff --git a/test/unit/protocol/types/test-Filler.js b/test/unit/protocol/types/test-Filler.js
@@ -0,0 +1,34 @@
+var common = require('../../../common');
+var assert = require('assert');
+var test   = require('utest');
+var Filler = require(common.dir.lib + '/protocol/types/Filler');
+
+test('Filler', {
+  '1 byte': function() {
+    var filler = new Filler(1);
+    var buffer = new Buffer([255]);
+
+    filler.copy(buffer, 0);
+
+    assert.deepEqual(buffer, new Buffer([0]));
+  },
+
+  '10 bytes': function() {
+    var filler = new Filler(10);
+    var buffer = new Buffer([0, 1, 2, 3, 4, 5, 6, 7, 8, 9]);
+
+    filler.copy(buffer, 0);
+
+    assert.deepEqual(buffer, new Buffer([0, 0, 0, 0, 0, 0, 0, 0, 0, 0]));
+  },
+
+  'offset': function() {
+    var filler = new Filler(1);
+    var buffer = new Buffer([1, 2, 3]);
+
+    filler.copy(buffer, 1);
+
+    assert.deepEqual(buffer, new Buffer([1, 0, 3]));
+  },
+});
+
