enabling speaker_lbels message passthrough for result extractor

Author: nfriedly

dist/watson-speech.js

@@ -46,6 +46,8 @@ ResultExtractor.prototype._transform = function(data, encoding, next) {
       cloned.index = data.result_index;
       this.push(cloned);
     }, this);
+  } else {
+    this.push(data);
   }
   next();
 };

speech-to-text/result-extractor.js

@@ -1,6 +1,7 @@
 'use strict';
 
 var assert = require('assert');
+var clone = require('clone');
 var ResultExtractor = require('../speech-to-text/result-extractor.js');
 
 describe('ResultExtractor', function() {
@@ -17,4 +18,21 @@ describe('ResultExtractor', function() {
     stream.write(source);
   });
 
+  it('should pass through speaker_labels messages', function(done) {
+    var stream = new ResultExtractor();
+    var source = {speaker_labels: [{
+      from: 28.92,
+      to: 29.17,
+      speaker: 1,
+      confidence: 0.641,
+      final: false
+    }]};
+    var expected = clone(source);
+    stream.on('data', function(actual) {
+      assert.deepEqual(actual, expected);
+      done();
+    });
+    stream.on('error', done);
+    stream.write(source);
+  });
 });