fix #1959 - LCS (#2129)

* fix #1959 - LCS

* newlines at end of files

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

@@ -0,0 +1,28 @@
+import { strict as assert } from 'assert';
+import testUtils, { GLOBAL } from '../test-utils';
+import { transformArguments } from './LCS_LEN';
+
+describe('LCS_LEN', () => {
+    testUtils.isVersionGreaterThanHook([7]);
+
+    it('transformArguments', () => {
+        assert.deepEqual(
+            transformArguments('1', '2'),
+            ['LCS', '1', '2', 'LEN']
+        );
+    });
+
+    testUtils.testWithClient('client.lcsLen', async client => {
+        assert.equal(
+            await client.lcsLen('1', '2'),
+            0
+        );
+    }, GLOBAL.SERVERS.OPEN);
+
+    testUtils.testWithCluster('cluster.lcsLen', async cluster => {
+        assert.equal(
+            await cluster.lcsLen('{tag}1', '{tag}2'),
+            0
+        );
+    }, GLOBAL.CLUSTERS.OPEN);
+});