feat: adds support for unlink cmd (#32)

Co-authored-by: eaddingtonwhite <[email protected]>

src/momento-redis-adapter.ts

@@ -184,6 +184,8 @@ export interface MomentoIORedis {
   flushdb(async: 'ASYNC'): Promise<'OK'>;
   flushdb(sync: 'SYNC'): Promise<'OK'>;
 
+  unlink(...args: [...keys: RedisKey[]]): Promise<number>;
+
   quit(): Promise<'OK'>;
 }
 
@@ -805,6 +807,11 @@ export class MomentoRedisAdapter
     return 0;
   }
 
+  async unlink(...args: [...keys: RedisKey[]]): Promise<number> {
+    await this.del(...args);
+    return args.length;
+  }
+
   async flushdb(): Promise<'OK'> {
     const rsp = await this.momentoClient.flushCache(this.cacheName);
     if (rsp instanceof CacheFlush.Success) {

test/get-set-delete.test.ts

@@ -233,3 +233,30 @@ describe('setex', () => {
     expect(getResult2).toBeNull();
   });
 });
+
+describe('unlink', () => {
+  it('happy path set get update unlink test', async () => {
+    const key = v4();
+    const value1 = v4();
+    const value2 = v4();
+    // Set initial key value
+    await client.set(key, value1);
+
+    // Get value
+    let result = await client.get(key);
+    expect(result).toEqual(value1);
+
+    // Update value
+    await client.set(key, value2);
+
+    // Read updated value
+    result = await client.get(key);
+    expect(result).toEqual(value2);
+    // Unlink key aka "Delete"
+    await client.unlink(key);
+
+    // Should get null back now
+    result = await client.get(key);
+    expect(result).toBeNull();
+  });
+});