added ids to exception objects (#475)

Author: willarmiros

packages/core/lib/segments/attributes/captured_exception.js

@@ -1,3 +1,5 @@
+const crypto = require('crypto');
+
 /**
  * Represents a captured exception.
  * @constructor
@@ -16,6 +18,7 @@ CapturedException.prototype.init = function init(err, remote) {
   this.type = e.name;
   this.stack = [];
   this.remote = !!remote;
+  this.id = crypto.randomBytes(8).toString('hex');
 
   if (e.stack) {
     var stack = e.stack.split('\n');

packages/core/test/unit/segments/attributes/captured_exception.test.js

@@ -9,6 +9,7 @@ describe('CapturedException', function() {
 
       assert.equal(captured.message, err);
       assert.equal(captured.type, '');
+      assert.equal(captured.id.length, 16);
       assert.deepEqual(captured.stack, []);
     });
 
@@ -18,6 +19,7 @@ describe('CapturedException', function() {
 
       assert.equal(captured.message, err.message);
       assert.equal(captured.type, err.name);
+      assert.equal(captured.id.length, 16);
       assert.isArray(captured.stack);
     });