fix config logging at startup (#78)

Fixes #77.

package.json

@@ -1,6 +1,6 @@
 {
   "name": "nflx-spectator",
-  "version": "2.0.0",
+  "version": "2.0.1",
   "author": "Matthew Johnson <[email protected]>",
   "main": "src/index.js",
   "types": "src/index.d.ts",

src/registry.js

@@ -174,7 +174,7 @@ class AtlasRegistry {
       return;
     }
 
-    this.logger.info(`Starting spectator registry with config: ${c}`);
+    this.logger.info(`Starting spectator registry with config: ${JSON.stringify(c)}`);
     this.started = true;
     this.startId = setInterval(AtlasRegistry._publish, c.frequency || 5000, this);
     this.startId.unref();

test/registry.test.js

@@ -6,19 +6,30 @@ const assert = chai.assert;
 const AtlasRegistry = require('../src/registry');
 const MeterId = require('../src/meter_id');
 
-function newRegistry() {
-  const c = {
+function newConfig() {
+  return {
     strictMode: true,
     commonTags: {
       'nf.node': 'i-12345',
       'nf.cluster': 'app-main',
       'nf.app': 'app'
     }
   };
+}
+
+function newRegistry() {
+  const c = newConfig();
   return new AtlasRegistry(c);
 }
 
 describe('AtlasRegistry', () => {
+  it('should log config correctly', () => {
+    const c = newConfig();
+    const log = `${JSON.stringify(c)}`;
+    const expected = '{"strictMode":true,"commonTags":{"nf.node":"i-12345","nf.cluster":"app-main","nf.app":"app"}}';
+    assert.deepEqual(log, expected);
+  });
+
   it('measurements', () => {
     const r = newRegistry();
     r.counter('c').increment();