Add ProblemType.prototype.reject() method

README.md

@@ -230,6 +230,12 @@ Create a new instance of this problem type and return it. The
 `options` argument is the same as the `options` for the
 `Problem` constructor.
 
+### Method: `<void> Problem.Type.prototype.reject([options])`
+
+Create a new instance of this problem type and create a rejected
+Promise with the Error. The `options` argument is the same as the
+`options` for the `Problem` constructor.
+
 ### Constants:
 
  *  `<Problem.Type> Problem.BLANK` - The `about:blank` Problem Type

index.js

@@ -94,6 +94,9 @@ ProblemType.prototype = {
   },
   throw : function(options) {
     throw this.raise(options);
+  },
+  reject : function(options) {
+    return Promise.reject(this.raise(options));
   }
 };
 Object.defineProperty(ProblemType.prototype, 'status', statusDef);

package.json

@@ -1,6 +1,6 @@
 {
   "name": "http-problem",
-  "version": "0.2.0",
+  "version": "0.3.0",
   "description": "HTTP Problem",
   "main": "index.js",
   "scripts": {
@@ -17,5 +17,7 @@
     "mocha": "^2.3.2",
     "request": "^2.62.0"
   },
-  "dependencies": {}
+  "dependencies": {
+    "http-status": "^0.2.3"
+  }
 }

test/test.js

@@ -87,13 +87,39 @@ describe('Problem', function() {
       'accounts': ['http://example.net/account/12345',
                    'http://example.net/account/67890']
     };
-    let problem = Problem.wrap(obj);
-    assert.throws(function() {
-      problem.throw();
-    });
+    var thrown = false;
+    try {
+      Problem.GONE.throw();
+    } catch(error) {
+      thrown = true;
+      assert.equal(error.status, 410);
+    }
+    assert(thrown);
     done();
   });
 
+  it('should reject', function(done) {
+    let obj = {
+      'type': 'http://example.com/probs/out-of-credit',
+      'title': 'You do not have enough credit.',
+      'detail': 'Your current balance is 30, but that costs 50.',
+      'instance': 'http://example.net/account/12345/msgs/abc',
+      'balance': 30,
+      'accounts': ['http://example.net/account/12345',
+                   'http://example.net/account/67890']
+    };
+    Problem.GONE.reject().then(
+      function onSuccess() {
+        assert.fail();
+        done();
+      },
+      function onError(error) {
+        assert(error);
+        assert.equal(error.status, 410);
+        done();
+      }
+    );
+  });
 });
 
 describe('Problem.middleware', function() {