first post

Nodejs-Socketio-Mysql-Demo/node_modules/mysql/test/unit/legacy/test-outgoing-packet.js

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+var common = require('./common');
+var OutgoingPacket = require(common.dir.lib + '/outgoing_packet'),
+    Buffer = require('buffer').Buffer;
+
+function test(test) {
+  gently = new Gently();
+  test();
+  gently.verify(test.name);
+}
+
+test(function constructor() {
+  var packet = new OutgoingPacket(10, 5);
+  assert.equal(packet.buffer.length, 14);
+  assert.deepEqual(
+    packet.buffer.slice(0, 3),
+    new Buffer([10, 0, 0])
+  );
+  assert.equal(packet.buffer[3], 5);
+  assert.equal(packet.index, 4);
+});
+
+test(function writeNumber() {
+  var packet = new OutgoingPacket(4);
+  packet.writeNumber(4, 257);
+  assert.deepEqual(
+    packet.buffer.slice(4, 8),
+    new Buffer([1, 1, 0, 0])
+  );
+});
+
+test(function writeFiller() {
+  var packet = new OutgoingPacket(5);
+  packet.writeFiller(5);
+  assert.equal(packet.index, 9);
+  assert.deepEqual(
+    packet.buffer.slice(4, 9),
+    new Buffer([0, 0, 0, 0, 0])
+  );
+});
+
+test(function write() {
+  (function testBuffer() {
+    var packet = new OutgoingPacket(3),
+        BUFFER = new Buffer([1, 2, 3]);
+
+    packet.write(BUFFER);
+    assert.equal(packet.index, 7);
+    assert.deepEqual(packet.buffer.slice(4, 7), BUFFER);
+  })();
+
+  (function testString() {
+    var packet = new OutgoingPacket(3),
+        STRING = 'abc';
+
+    packet.write(STRING);
+    assert.equal(packet.index, 7);
+    assert.equal(packet.buffer.slice(4, 7).toString(), STRING);
+  })();
+});
+
+test(function writeNullTerminated() {
+  var packet = new OutgoingPacket(4),
+      BUFFER = new Buffer([17, 23, 42]);
+
+  packet.buffer[7] = 100; // set last byte to non-0
+
+  gently.expect(packet, 'write', function(buffer) {
+    assert.strictEqual(buffer, BUFFER);
+    this.index += buffer.length;
+  });
+
+  packet.writeNullTerminated(BUFFER);
+  assert.equal(packet.buffer[7], 0);
+  assert.equal(packet.index, 8);
+});
+
+test(function writeLengthCoded() {
+  (function test1ByteNumber() {
+    var packet = new OutgoingPacket(1);
+    packet.writeLengthCoded(250);
+    assert.equal(packet.buffer[4], 250);
+    assert.equal(packet.index, 5);
+  })();
+
+  (function test2ByteNumber() {
+    var packet = new OutgoingPacket(6);
+    packet.writeLengthCoded(251);
+    assert.equal(packet.buffer[4], 252);
+    assert.equal(packet.buffer[5], 251);
+    assert.equal(packet.buffer[6], 0);
+    assert.equal(packet.index, 7);
+
+    packet.writeLengthCoded(257);
+    assert.equal(packet.buffer[7], 252);
+    assert.equal(packet.buffer[8], 1);
+    assert.equal(packet.buffer[9], 1);
+    assert.equal(packet.index, 10);
+  })();
+
+  (function test3ByteNumber() {
+    var packet = new OutgoingPacket(4);
+    packet.writeLengthCoded(Math.pow(256, 0) * 5 + Math.pow(256, 1) * 6 + Math.pow(256, 2) * 7);
+    assert.equal(packet.buffer[4], 253);
+    assert.equal(packet.buffer[5], 5);
+    assert.equal(packet.buffer[6], 6);
+    assert.equal(packet.buffer[7], 7);
+    assert.equal(packet.index, 8);
+  })();
+
+  (function testNull() {
+    var packet = new OutgoingPacket(1);
+    packet.writeLengthCoded(null);
+    assert.equal(packet.buffer[4], 251);
+    assert.equal(packet.index, 5);
+  })();
+
+  (function testBuffer() {
+    var packet = new OutgoingPacket(4),
+        BUFFER = new Buffer([17, 23, 42]);
+
+    packet.writeLengthCoded(BUFFER);
+    assert.equal(packet.buffer[4], 3);
+    assert.deepEqual(packet.buffer.slice(5, 8), BUFFER);
+  })();
+
+  (function testString() {
+    var packet = new OutgoingPacket(6),
+        STRING = 'über';
+
+    packet.writeLengthCoded(STRING);
+    assert.equal(packet.buffer[4], 5);
+    assert.equal(packet.buffer.slice(5, 10).toString(), STRING);
+  })();
+});