Merge pull request #232 from laconbass/assert-throws

Avoid error instantiation if possible on assert.throws
chaijs · Jan 29, 2014 · be23285 · be23285
2 parents b01eba7 + 3741f05
commit be23285
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/lib/chai/core/assertions.js b/lib/chai/core/assertions.js
@@ -1040,7 +1040,10 @@ module.exports = function (chai, _) {
       constructor = null;
       errMsg = null;
     } else if (typeof constructor === 'function') {
-      name = (new constructor()).name;
+      name = constructor.prototype.name || constructor.name;
+      if (name === 'Error' && constructor !== Error) {
+        name = (new constructor()).name;
+      }
     } else {
       constructor = null;
     }