feat(metrics): increase maximum dimensions to 29 (#1072)

* improv(metrics): Add support to 30 dimensions

* docs(metrics): update max dimensions

Author: sthuber90

Diff for: docs/core/metrics.md

@@ -301,7 +301,7 @@ If you do not use the middleware or decorator, you have to flush your metrics ma
 !!! warning "Metric validation"
     If metrics are provided, and any of the following criteria are not met, a **`RangeError`** exception will be thrown:
 
-    * Maximum of 9 dimensions
+    * Maximum of 29 dimensions
     * Namespace is set only once (or none)
     * Metric units must be [supported by CloudWatch](https://docs.aws.amazon.com/AmazonCloudWatch/latest/APIReference/API_MetricDatum.html)
 

Diff for: packages/metrics/src/Metrics.ts

@@ -14,7 +14,7 @@ import {
 } from './types';
 
 const MAX_METRICS_SIZE = 100;
-const MAX_DIMENSION_COUNT = 9;
+const MAX_DIMENSION_COUNT = 29;
 const DEFAULT_NAMESPACE = 'default_namespace';
 
 /**

Diff for: packages/metrics/tests/unit/Metrics.test.ts

@@ -13,7 +13,7 @@ import { Metrics, MetricUnits } from '../../src/';
 import { populateEnvironmentVariables } from '../helpers';
 
 const MAX_METRICS_SIZE = 100;
-const MAX_DIMENSION_COUNT = 9;
+const MAX_DIMENSION_COUNT = 29;
 const DEFAULT_NAMESPACE = 'default_namespace';
 
 const consoleSpy = jest.spyOn(console, 'log').mockImplementation();
@@ -371,7 +371,7 @@ describe('Class: Metrics', () => {
       }
     });
 
-    test('Error should be thrown on empty metrics when throwOnEmptyMetrics() is callse', async () => {
+    test('Error should be thrown on empty metrics when throwOnEmptyMetrics() is called', async () => {
       expect.assertions(1);
 
       const metrics = new Metrics({ namespace: 'test' });
@@ -459,6 +459,7 @@ describe('Class: Metrics', () => {
     });
 
     test('Should throw an error if the same metric name is added again with a different unit', ()=> {
+      expect.assertions(1);
       const metrics = new Metrics();
 
       metrics.addMetric('test_name', MetricUnits.Count, 2);