Update doctest client with latest v4 release (#2844)

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

@@ -0,0 +1,30 @@
+import { strict as assert } from 'assert';
+import testUtils, { GLOBAL } from '../test-utils';
+import { transformArguments } from './PUBSUB_SHARDCHANNELS';
+
+describe('PUBSUB SHARDCHANNELS', () => {
+    testUtils.isVersionGreaterThanHook([7]);
+    
+    describe('transformArguments', () => {
+        it('without pattern', () => {
+            assert.deepEqual(
+                transformArguments(),
+                ['PUBSUB', 'SHARDCHANNELS']
+            );
+        });
+
+        it('with pattern', () => {
+            assert.deepEqual(
+                transformArguments('patter*'),
+                ['PUBSUB', 'SHARDCHANNELS', 'patter*']
+            );
+        });
+    });
+
+    testUtils.testWithClient('client.pubSubShardChannels', async client => {
+        assert.deepEqual(
+            await client.pubSubShardChannels(),
+            []
+        );
+    }, GLOBAL.SERVERS.OPEN);
+});