implement some GEO commands, improve scan generic transformer, expose RPUSHX

lib/commands/GEOPOS.spec.ts

@@ -0,0 +1,35 @@
+import { strict as assert } from 'assert';
+import { TestRedisServers, itWithClient, TestRedisClusters, itWithCluster } from '../test-utils';
+import { transformArguments } from './GEOPOS';
+
+describe('GEOPOS', () => {
+    describe('transformArguments', () => {
+        it('single member', () => {
+            assert.deepEqual(
+                transformArguments('key', 'member'),
+                ['GEOPOS', 'key', 'member']
+            );
+        });
+
+        it('multiple members', () => {
+            assert.deepEqual(
+                transformArguments('key', ['1', '2']),
+                ['GEOPOS', 'key', '1', '2']
+            );
+        });
+    });
+
+    itWithClient(TestRedisServers.OPEN, 'client.geoPos', async client => {
+        assert.deepEqual(
+            await client.geoPos('key', 'member'),
+            [null]
+        );
+    });
+
+    itWithCluster(TestRedisClusters.OPEN, 'cluster.geoPos', async cluster => {
+        assert.deepEqual(
+            await cluster.geoPos('key', 'member'),
+            [null]
+        );
+    });
+});