Set constructor name when possible

closes #12

Author: dougwilson

HISTORY.md

@@ -1,6 +1,7 @@
 unreleased
 ==========
 
+  * Set constructor name when possible
   * deps: statuses@'>= 1.5.0 < 2'
 
 2018-03-29 / 1.6.3

index.js

@@ -162,6 +162,7 @@ function createClientErrorConstructor (HttpError, name, code) {
   }
 
   inherits(ClientError, HttpError)
+  nameFunc(ClientError, className)
 
   ClientError.prototype.status = code
   ClientError.prototype.statusCode = code
@@ -209,6 +210,7 @@ function createServerErrorConstructor (HttpError, name, code) {
   }
 
   inherits(ServerError, HttpError)
+  nameFunc(ServerError, className)
 
   ServerError.prototype.status = code
   ServerError.prototype.statusCode = code
@@ -217,6 +219,20 @@ function createServerErrorConstructor (HttpError, name, code) {
   return ServerError
 }
 
+/**
+ * Set the name of a function, if possible.
+ * @private
+ */
+
+function nameFunc (func, name) {
+  var desc = Object.getOwnPropertyDescriptor(func, 'name')
+
+  if (desc.configurable) {
+    desc.value = name
+    Object.defineProperty(func, 'name', desc)
+  }
+}
+
 /**
  * Populate the exports object with constructors for every error class.
  * @private