use dockers for tests, use npm workspaces, add rejson & redisearch modules, fix some bugs

packages/client/lib/commands/EXISTS.spec.ts

@@ -0,0 +1,28 @@
+import { strict as assert } from 'assert';
+import testUtils, { GLOBAL } from '../test-utils';
+import { transformArguments } from './EXISTS';
+
+describe('EXISTS', () => {
+    describe('transformArguments', () => {
+        it('string', () => {
+            assert.deepEqual(
+                transformArguments('key'),
+                ['EXISTS', 'key']
+            );
+        });
+
+        it('array', () => {
+            assert.deepEqual(
+                transformArguments(['1', '2']),
+                ['EXISTS', '1', '2']
+            );
+        });
+    });
+
+    testUtils.testWithClient('client.exists', async client => {
+        assert.equal(
+            await client.exists('key'),
+            false
+        );
+    }, GLOBAL.SERVERS.OPEN);
+});