Use check-error to get expected constructor name

We now use the check-error package to get the constructor name of the error we expect to get with `rejectedWith`. For recent versions of Chai, this makes `rejectedWith` consistent in behavior with Chai's `throw`.

Fixes #64.

lib/chai-as-promised.js

@@ -3,21 +3,21 @@
     /* istanbul ignore else */
     if (typeof require === "function" && typeof exports === "object" && typeof module === "object") {
         // NodeJS
-        module.exports = factory();
+        module.exports = factory(require("check-error"));
     } else if (typeof define === "function" && define.amd) {
         // AMD
-        define(factory);
+        define(["check-error"], factory);
     } else {
         /*global self: false */
 
         // Other environment (usually <script> tag): plug in to global chai instance directly.
-        var chaiAsPromised = factory();
+        var chaiAsPromised = factory(self.checkError);
         chai.use(chaiAsPromised);
 
         // Expose as a property of the global object so that consumers can configure the `transferPromiseness` property.
         self.chaiAsPromised = chaiAsPromised;
     }
-}(function () {
+}(function (checkError) {
     "use strict";
 
     chaiAsPromised.transferPromiseness = function (assertion, promise) {
@@ -32,6 +32,13 @@
         var Assertion = chai.Assertion;
         var assert = chai.assert;
 
+        // If we are using a version of Chai that has checkError on it,
+        // we want to use that version to be consistent. Otherwise, we use
+        // what was passed to the factory.
+        if (utils.checkError) {
+            checkError = utils.checkError;
+        }
+
         function isLegacyJQueryPromise(thenable) {
             // jQuery promises are Promises/A+-compatible since 3.0.0. jQuery 3.0.0 is also the first version
             // to define the catch method.
@@ -154,7 +161,7 @@
                 Constructor = null;
                 message = null;
             } else if (typeof Constructor === "function") {
-                constructorName = (new Constructor()).name;
+                constructorName = checkError.getConstructorName(Constructor);
             } else {
                 Constructor = null;
             }

package.json

@@ -30,14 +30,15 @@
     "cover": "istanbul cover node_modules/mocha/bin/_mocha && opener ./coverage/lcov-report/lib/chai-as-promised.js.html"
   },
   "peerDependencies": {
-    "chai": ">= 2.1.2 < 4"
+    "chai": ">= 2.1.2 < 4",
+    "check-error": "^1.0.2"
   },
   "devDependencies": {
     "chai": "^3.0.0",
     "coffee-script": "1.10.0",
-    "istanbul": "0.4.1",
     "ecstatic": "^1.3.1",
     "glob": "^6.0.1",
+    "istanbul": "0.4.1",
     "jshint": "^2.8.0",
     "mocha": "^2.3.4",
     "opener": "^1.4.1",