Add support for BF.CARD command (#2376)

* Add support for BF.CARD command

* Update index.ts

* Update CARD.ts

* Update CARD.spec.ts

Co-authored-by: Leibale Eidelman <me@leibale.com>

packages/bloom/lib/commands/bloom/CARD.spec.ts

@@ -0,0 +1,19 @@
+import { strict as assert } from 'assert';
+import testUtils, { GLOBAL } from '../../test-utils';
+import { transformArguments } from './CARD';
+
+describe('BF CARD', () => {
+    it('transformArguments', () => {
+        assert.deepEqual(
+            transformArguments('bloom'),
+            ['BF.CARD', 'bloom']
+        );
+    });
+
+    testUtils.testWithClient('client.bf.card', async client => {
+        assert.equal(
+            await client.bf.card('key'),
+            0
+        );
+    }, GLOBAL.SERVERS.OPEN);
+});

packages/bloom/lib/commands/bloom/CARD.ts

@@ -0,0 +1,9 @@
+export const FIRST_KEY_INDEX = 1;
+
+export const IS_READ_ONLY = true;
+
+export function transformArguments(key: string): Array<string> {
+    return ['BF.CARD', key];
+}
+
+export declare function transformReply(): number;

packages/bloom/lib/commands/bloom/index.ts

@@ -1,4 +1,5 @@
 import * as ADD from './ADD';
+import * as CARD from './CARD';
 import * as EXISTS from './EXISTS';
 import * as INFO from './INFO';
 import * as INSERT from './INSERT';
@@ -11,6 +12,8 @@ import * as SCANDUMP from './SCANDUMP';
 export default {
     ADD,
     add: ADD,
+    CARD,
+    card: CARD,
     EXISTS,
     exists: EXISTS,
     INFO,