legacy mode

packages/client/lib/client/legacy-mode.spec.ts

@@ -0,0 +1,111 @@
+import { strict as assert } from 'assert';
+import testUtils, { GLOBAL } from '../test-utils';
+import { promisify } from 'util';
+import { RedisLegacyClientType } from './legacy-mode';
+import { ErrorReply } from '../errors';
+import { RedisClientType } from '.';
+import { once } from 'events';
+
+function testWithLegacyClient(title: string, fn: (legacy: RedisLegacyClientType, client: RedisClientType) => Promise<unknown>) {
+  testUtils.testWithClient(title, client => fn(client.legacy(), client), GLOBAL.SERVERS.OPEN);
+}
+
+describe.only('Legacy Mode', () => {
+  describe('client.sendCommand', () => {
+    testWithLegacyClient('resolve', async client => {
+      assert.equal(
+        await promisify(client.sendCommand).call(client, 'PING'),
+        'PONG'
+      );
+    });
+
+    testWithLegacyClient('reject', async client => {
+      await assert.rejects(
+        promisify(client.sendCommand).call(client, 'ERROR'),
+        ErrorReply
+      );
+    });
+
+    testWithLegacyClient('reject without a callback', async (legacy, client) => {
+      legacy.sendCommand('ERROR');
+      const [err] = await once(client, 'error');
+      assert.ok(err instanceof ErrorReply);
+    });
+  });
+
+  describe('hGetAll (TRANSFORM_LEGACY_REPLY)', () => {  
+    testWithLegacyClient('resolve', async client => {
+      await promisify(client.hSet).call(client, 'key', 'field', 'value');
+      assert.deepEqual(
+        await promisify(client.hGetAll).call(client, 'key'),
+        Object.create(null, {
+          field: {
+            value: 'value',
+            configurable: true,
+            enumerable: true
+          }
+        })
+      );
+    });
+
+    testWithLegacyClient('reject', async client => {
+      await assert.rejects(
+        promisify(client.hGetAll).call(client),
+        ErrorReply
+      );
+    });
+  });
+
+  describe('client.set', () => {
+    testWithLegacyClient('vardict', async client => {
+      assert.equal(
+        await promisify(client.set).call(client, 'a', 'b'),
+        'OK'
+      );
+    });
+
+    testWithLegacyClient('array', async client => {
+      assert.equal(
+        await promisify(client.set).call(client, ['a', 'b']),
+        'OK'
+      );
+    });
+
+    testWithLegacyClient('vardict & arrays', async client => {
+      assert.equal(
+        await promisify(client.set).call(client, ['a'], 'b', ['EX', 1]),
+        'OK'
+      );
+    });
+
+    testWithLegacyClient('reject without a callback', async (legacy, client) => {
+      legacy.set('ERROR');
+      const [err] = await once(client, 'error');
+      assert.ok(err instanceof ErrorReply);
+    });
+  });
+
+  describe('client.multi', () => {
+    testWithLegacyClient('resolve', async client => {
+      const multi = client.multi().ping().sendCommand('PING');
+      assert.deepEqual(
+        await promisify(multi.exec).call(multi),
+        ['PONG', 'PONG']
+      );
+    });
+    
+    testWithLegacyClient('reject', async client => {
+      const multi = client.multi().sendCommand('ERROR');
+      await assert.rejects(
+        promisify(multi.exec).call(multi),
+        ErrorReply
+      );
+    });
+
+    testWithLegacyClient('reject without a callback', async (legacy, client) => {
+      legacy.multi().sendCommand('ERROR').exec();
+      const [err] = await once(client, 'error');
+      assert.ok(err instanceof ErrorReply);
+    });
+  });
+});

packages/client/lib/client/legacy-mode.ts

@@ -91,7 +91,7 @@ export class RedisLegacyClient {
     this._Multi = LegacyMultiCommand.factory(RESP);
   }
 
-  sendCommand(...args: LegacyArguments) {
+  sendCommand(...args: LegacyCommandArguments) {
     const redisArgs: CommandArguments = [],
       callback = RedisLegacyClient._transformArguments(redisArgs, args),
       promise = this._client.sendCommand(redisArgs);
@@ -115,15 +115,16 @@ type MultiWithCommands = {
   [P in keyof typeof COMMANDS]: (...args: LegacyCommandArguments) => RedisLegacyMultiType;
 };
 
-export type RedisLegacyMultiType = Omit<LegacyMultiCommand, '_client'> & MultiWithCommands;
+export type RedisLegacyMultiType = LegacyMultiCommand & MultiWithCommands;
 
-class LegacyMultiCommand extends RedisMultiCommand {
+class LegacyMultiCommand {
   private static _createCommand(name: string, command: Command, resp: RespVersions) {
     const transformReply = RedisLegacyClient.getTransformReply(command, resp);
     return function (this: LegacyMultiCommand, ...args: LegacyArguments) {
       const redisArgs = [name];
       RedisLegacyClient.pushArguments(redisArgs, args);
-      return this.addCommand(redisArgs, transformReply);
+      this._multi.addCommand(redisArgs, transformReply);
+      return this;
     };
   }
 
@@ -144,21 +145,22 @@ class LegacyMultiCommand extends RedisMultiCommand {
     };
   }
 
-  private _client: RedisClientType<RedisModules, RedisFunctions, RedisScripts>;
+  private readonly _multi = new RedisMultiCommand();
+  private readonly _client: RedisClientType<RedisModules, RedisFunctions, RedisScripts>;
 
   constructor(client: RedisClientType<RedisModules, RedisFunctions, RedisScripts>) {
-    super();
     this._client = client;
   }
 
   sendCommand(...args: LegacyArguments) {
     const redisArgs: CommandArguments = [];
     RedisLegacyClient.pushArguments(redisArgs, args);
-    return this.addCommand(redisArgs);
+    this._multi.addCommand(redisArgs);
+    return this;
   }
 
   exec(cb?: (err: ErrorReply | null, replies?: Array<unknown>) => unknown) {
-    const promise = this._client.executeMulti(this.queue);
+    const promise = this._client.executeMulti(this._multi.queue);
 
     if (!cb) {
       promise.catch(err => this._client.emit('error', err));
@@ -166,7 +168,7 @@ class LegacyMultiCommand extends RedisMultiCommand {
     }
 
     promise
-      .then(results => cb(null, this.transformReplies(results)))
+      .then(results => cb(null, this._multi.transformReplies(results)))
       .catch(err => cb?.(err));
   }
 }