Support RedisTimeSeries (#1757)

* Implement missing commands and add test

* Update DECRBY.spec.ts

* Small changes

* clean code

* Update MGET_WITHLABELS.ts

Use map in transformReply

Co-authored-by: leibale <leibale1998@gmail.com>

packages/time-series/lib/commands/MREVRANGE.spec.ts

@@ -0,0 +1,50 @@
+import { strict as assert } from 'assert';
+import testUtils, { GLOBAL } from '../test-utils';
+import { transformArguments } from './MREVRANGE';
+import { TimeSeriesAggregationType, TimeSeriesReducers } from '.';
+
+describe('MREVRANGE', () => {
+    it('transformArguments', () => {
+        assert.deepEqual(
+            transformArguments('-', '+', 'label=value', {
+                FILTER_BY_TS: [0],
+                FILTER_BY_VALUE: {
+                    min: 0,
+                    max: 1
+                },
+                COUNT: 1,
+                ALIGN: '-',
+                AGGREGATION: {
+                    type: TimeSeriesAggregationType.AVARAGE,
+                    timeBucket: 1
+                },
+                GROUPBY: {
+                    label: 'label',
+                    reducer: TimeSeriesReducers.SUM
+                },
+            }),
+            ['TS.MREVRANGE', '-', '+', 'FILTER_BY_TS', '0', 'FILTER_BY_VALUE', '0', '1',
+            'COUNT', '1', 'ALIGN', '-', 'AGGREGATION', 'avg', '1', 'FILTER', 'label=value',
+            'GROUPBY', 'label', 'REDUCE', 'sum']
+        );
+    });
+
+    testUtils.testWithClient('client.ts.mRevRange', async client => {
+        await client.ts.add('key', 0, 0, {
+            LABELS: { label: 'value'}
+        });
+
+        assert.deepEqual(
+            await client.ts.mRevRange('-', '+', 'label=value', {
+                COUNT: 1
+            }),
+            [{
+                key: 'key',
+                samples: [{
+                    timestamp: 0,
+                    value: 0
+                }]
+            }]
+        );
+    }, GLOBAL.SERVERS.OPEN);
+});