Add connection_breaker test tool for redis#622

connection_breaker.js

@@ -0,0 +1,80 @@
+var net = require('net');
+
+var proxyPort = 6379;
+var counter = 0;
+
+function breaker(conn) {
+    conn.end();
+    conn.destroy();
+}
+
+var server = net.createServer(function(conn) {
+    counter++;
+    var proxyConn = net.createConnection({
+        port: proxyPort
+    });
+    conn.pipe(proxyConn);
+    proxyConn.pipe(conn);
+    proxyConn.on('end', function() {
+        conn.end();
+    });
+    conn.on('end', function() {
+        proxyConn.end();
+    });
+    conn.on('close', function() {
+        proxyConn.end();
+    });
+    proxyConn.on('close', function() {
+        conn.end();
+    });
+    proxyConn.on('error', function() {
+        conn.end();
+    });
+    conn.on('error', function() {
+        proxyConn.end();
+    });
+
+    setTimeout(breaker.bind(null, conn), Math.floor(Math.random() * 2000));
+});
+server.listen(6479);
+
+var redis = require('./');
+
+var port = 6479;
+
+var client = redis.createClient(6479, 'localhost');
+
+function iter() {
+    var k = "k" + Math.floor(Math.random() * 10);
+    var coinflip = Math.random() > 0.5;
+    if (coinflip) {
+        client.set(k, k, function(err, resp) {
+            if (!err && resp !== "OK") {
+                console.log("Unexpected set response " + resp);
+            }
+        });
+    } else {
+        client.get(k, function(err, resp) {
+            if (!err) {
+                if (k !== resp) {
+                    console.log("Key response mismatch: " + k + " " + resp);
+                }
+            }
+        });
+    }
+}
+
+function iters() {
+    for (var i = 0; i < 100; ++i) {
+        iter();
+    }
+    setTimeout(iters, 10);
+}
+
+client.on("connect", function () {
+    iters();
+});
+
+client.on("error", function (err) {
+    console.log("Client error " + err);
+});