support command LATENCY DOCTOR (#2053)

* The Latency Doctor Command has been added to the project

* Update LATENCY_DOCTOR.ts

* Update LATENCY_DOCTOR.spec.ts

* Update LATENCY_DOCTOR.spec.ts

Co-authored-by: QuentinRK <q.rankin@outlook.com>
Co-authored-by: Leibale Eidelman <leibale1998@gmail.com>

packages/client/lib/client/commands.ts

@@ -84,6 +84,7 @@ import * as SWAPDB from '../commands/SWAPDB';
 import * as TIME from '../commands/TIME';
 import * as UNWATCH from '../commands/UNWATCH';
 import * as WAIT from '../commands/WAIT';
+import * as LATENCY_DOCTOR from '../commands/LATENCY_DOCTOR';
 
 export default {
     ...CLUSTER_COMMANDS,
@@ -193,6 +194,8 @@ export default {
     keys: KEYS,
     LASTSAVE,
     lastSave: LASTSAVE,
+    LATENCY_DOCTOR,
+    latencyDoctor: LATENCY_DOCTOR,
     LOLWUT,
     lolwut: LOLWUT,
     MEMOERY_DOCTOR,

packages/client/lib/commands/LATENCY_DOCTOR.spec.ts

@@ -0,0 +1,19 @@
+import {strict as assert} from 'assert';
+import testUtils, {GLOBAL} from '../test-utils';
+import { transformArguments } from './LATENCY_DOCTOR';
+
+describe('LATENCY DOCTOR', () => {
+    it('transformArguments', () => {
+        assert.deepEqual(
+            transformArguments(),
+            ['LATENCY', 'DOCTOR']
+        );
+    });
+
+    testUtils.testWithClient('client.latencyDoctor', async client => {
+        assert.equal(
+            typeof (await client.latencyDoctor()),
+            'string'
+        );
+    }, GLOBAL.SERVERS.OPEN);
+});

packages/client/lib/commands/LATENCY_DOCTOR.ts

@@ -0,0 +1,5 @@
+export function transformArguments(): Array<string> {
+    return ['LATENCY', 'DOCTOR'];
+}
+
+export declare function transformReply(): string;