add renamenx (stipsan#152)

* add renamenx

* update preversion script to auto commit compat table updates

* chore(compat): update feature table

* 1.9.1

* fix quotes

* update script

* chore(compat): update feature table

* 1.10.0

compat.md

@@ -105,7 +105,7 @@
 |[readonly](http://redis.io/commands/READONLY)|:white_check_mark:|:x:|
 |[readwrite](http://redis.io/commands/READWRITE)|:white_check_mark:|:x:|
 |[rename](http://redis.io/commands/RENAME)|:white_check_mark:|:white_check_mark:|
-|[renamenx](http://redis.io/commands/RENAMENX)|:white_check_mark:|:x:|
+|[renamenx](http://redis.io/commands/RENAMENX)|:white_check_mark:|:white_check_mark:|
 |[replconf](http://redis.io/commands/REPLCONF)|:white_check_mark:|:x:|
 |[restore](http://redis.io/commands/RESTORE)|:white_check_mark:|:x:|
 |[restore-asking](http://redis.io/commands/RESTORE-ASKING)|:white_check_mark:|:x:|

package.json

@@ -1,12 +1,12 @@
 {
   "name": "ioredis-mock",
-  "version": "1.9.0",
+  "version": "1.10.0",
   "description": "This library emulates ioredis by performing all operations in-memory.",
   "main": "./lib",
   "scripts": {
     "clean": "rimraf lib",
     "prepublish": "npm run clean && npm run build",
-    "preversion": "node scripts/update-compat",
+    "preversion": "node scripts/update-compat && git add . && git commit --allow-empty -m \"chore(compat): update feature table\"",
     "build": "mkdirp lib && babel src --out-dir lib",
     "build:watch": "npm run build -- --watch",
     "test": "mocha --compilers js:babel-register --recursive",

src/commands/index.js

@@ -26,6 +26,7 @@ export * from './lrem';
 export * from './mget';
 export * from './publish';
 export * from './rename';
+export * from './renamenx';
 export * from './rpoplpush';
 export * from './rpush';
 export * from './sadd';

src/commands/renamenx.js

@@ -0,0 +1,11 @@
+import { rename } from './rename';
+
+export function renamenx(key, newKey) {
+  if ({}.hasOwnProperty.call(this.data, newKey)) {
+    return '0';
+  }
+
+  rename.call(this, key, newKey);
+
+  return '1';
+}

test/commands/renamenx.js

@@ -0,0 +1,26 @@
+import expect from 'expect';
+
+import MockRedis from '../../src';
+
+describe('renamenx', () => {
+  it('should return integer 1 on key rename', () => {
+    const redis = new MockRedis({
+      data: {
+        foo: 'baz',
+      },
+    });
+    return redis.renamenx('foo', 'bar').then(status => expect(status).toBe('1'))
+      .then(() => expect(redis.data).toEqual({ bar: 'baz' }));
+  });
+
+  it('should return integer 0 if new key already exist', () => {
+    const redis = new MockRedis({
+      data: {
+        foo: 'baz',
+        bar: 'foobar',
+      },
+    });
+    return redis.renamenx('foo', 'bar').then(status => expect(status).toBe('0'))
+      .then(() => expect(redis.data).toEqual({ foo: 'baz', bar: 'foobar' }));
+  });
+});