Exporter/Stats/Stackdriver: Fix MetricDescriptors ValueType (#197)

* StackdriverStatsExporter: valueType to string

* Remove MONEY, STRING and BOOL ValueTypes

Author: mayurkale22

packages/opencensus-exporter-stackdriver/src/types.ts

@@ -72,13 +72,10 @@ export enum MetricKind {
 }
 
 export enum ValueType {
-  VALUE_TYPE_UNSPECIFIED,
-  BOOL,
-  INT64,
-  DOUBLE,
-  STRING,
-  DISTRIBUTION,
-  MONEY
+  VALUE_TYPE_UNSPECIFIED = 'VALUE_TYPE_UNSPECIFIED',
+  INT64 = 'INT64',
+  DOUBLE = 'DOUBLE',
+  DISTRIBUTION = 'DISTRIBUTION'
 }
 
 export interface LabelDescriptor {

packages/opencensus-exporter-stackdriver/test/test-stackdriver-monitoring.ts

@@ -14,16 +14,12 @@
  * limitations under the License.
  */
 
-import {AggregationType, BaseView, logger, Logger, Measure, Measurement, MeasureType, MeasureUnit, Stats, View} from '@opencensus/core';
+import {AggregationType, BaseView, logger, Logger, Measurement, MeasureType, MeasureUnit, Stats, View} from '@opencensus/core';
 import * as assert from 'assert';
 import * as fs from 'fs';
-import * as mocha from 'mocha';
 import * as nock from 'nock';
-import * as path from 'path';
-
 import {StackdriverStatsExporter} from '../src/stackdriver-monitoring';
-import {LabelDescriptor, MetricDescriptor, MetricKind, StackdriverExporterOptions, TimeSeries, ValueType} from '../src/types';
-
+import {MetricDescriptor, MetricKind, StackdriverExporterOptions, TimeSeries, ValueType} from '../src/types';
 import * as nocks from './nocks';
 
 let PROJECT_ID = 'fake-project-id';