From 3a169d5e35b73b4c35f4df37781737d405699030 Mon Sep 17 00:00:00 2001
From: leibale <leibale1998@gmail.com>
Date: Mon, 20 Sep 2021 18:59:42 -0400
Subject: [PATCH] fix #1660 - add support for client.HSET('key', 'field',
 'value')

---
 lib/commands/HSET.spec.ts |  9 ++++++++-
 lib/commands/HSET.ts      | 13 +++++++++++--
 2 files changed, 19 insertions(+), 3 deletions(-)

diff --git a/lib/commands/HSET.spec.ts b/lib/commands/HSET.spec.ts
index af7bcb6eb2..601e7f967e 100644
--- a/lib/commands/HSET.spec.ts
+++ b/lib/commands/HSET.spec.ts
@@ -4,6 +4,13 @@ import { TestRedisServers, itWithClient, TestRedisClusters, itWithCluster } from
 
 describe('HSET', () => {
     describe('transformArguments', () => {
+        it('field, value', () => {
+            assert.deepEqual(
+                transformArguments('key', 'field', 'value'),
+                ['HSET', 'key', 'field', 'value']
+            );
+        });
+
         it('Map', () => {
             assert.deepEqual(
                 transformArguments('key', new Map([['field', 'value']])),
@@ -30,7 +37,7 @@ describe('HSET', () => {
 
     itWithClient(TestRedisServers.OPEN, 'client.hSet', async client => {
         assert.equal(
-            await client.hSet('key', { field: 'value' }),
+            await client.hSet('key', 'field', 'value'),
             1
         );
     });
diff --git a/lib/commands/HSET.ts b/lib/commands/HSET.ts
index 3edaa64b4e..cbd46061ad 100644
--- a/lib/commands/HSET.ts
+++ b/lib/commands/HSET.ts
@@ -1,3 +1,4 @@
+import { TransformArgumentsReply } from '.';
 import { transformReplyString } from './generic-transformers';
 
 type HSETObject = Record<string | number, string | number>;
@@ -8,10 +9,18 @@ type HSETTuples = Array<[string, string]> | Array<string>;
 
 export const FIRST_KEY_INDEX = 1;
 
-export function transformArguments(key: string, value: HSETObject | HSETMap | HSETTuples): Array<string> {
+type GenericArguments = [key: string];
+
+type SingleFieldArguments = [...generic: GenericArguments, field: string, value: string];
+
+type MultipleFieldsArguments = [...generic: GenericArguments, value: HSETObject | HSETMap | HSETTuples];
+
+export function transformArguments(...[ key, value, fieldValue ]: SingleFieldArguments | MultipleFieldsArguments): TransformArgumentsReply {
     const args = ['HSET', key];
 
-    if (value instanceof Map) {
+    if (typeof value === 'string') {
+        args.push(value, fieldValue!);
+    } else if (value instanceof Map) {
         pushMap(args, value);
     } else if (Array.isArray(value)) {
         pushTuples(args, value);