remove some commands from cluster, npm update, clean code,

lib/client/socket.spec.ts

@@ -0,0 +1,38 @@
+import { strict as assert } from 'assert';
+import { SinonFakeTimers, useFakeTimers, spy } from 'sinon';
+import RedisSocket from './socket';
+
+describe('Socket', () => {
+    describe('reconnectStrategy', () => {
+        let clock: SinonFakeTimers;
+        beforeEach(() => clock = useFakeTimers());
+        afterEach(() => clock.uninstall());
+
+        it('custom strategy', () => {
+            const reconnectStrategy = spy((retries: number): number | Error => {
+                assert.equal(retries + 1, reconnectStrategy.callCount);
+
+                if (retries === 50) {
+                    return Error('50');
+                }
+
+                const time = retries * 2;
+                queueMicrotask(() => clock.tick(time));
+                return time;
+            });
+
+            const socket = new RedisSocket(undefined, {
+                host: 'error',
+                reconnectStrategy
+            });
+
+            socket.on('error', () => {
+                // ignore errors
+            });
+
+            return assert.rejects(socket.connect(), {
+                message: '50'
+            });
+        })
+    });
+});