Pass iframe errors up to the parent error handler (if there is one).

app/assets/javascripts/konacha/iframe.js

@@ -5,6 +5,13 @@ window.Konacha = {
   }
 };
 
+// Push errors to parent iframe.
+window.onerror = function() {
+  if (parent.onerror) {
+    return parent.onerror.apply(parent, arguments);
+  }
+};
+
 window.Mocha = Object.create(parent.Mocha);
 window.mocha = Object.create(parent.mocha);
 

spec/dummy/spec/javascripts/failing_spec.js

@@ -8,4 +8,13 @@ describe("failure", function(){
     // throwing real Error objects.
     throw new Error("this one errors out");
   });
+
+  it("errors asynchronously", function(done) {
+    setTimeout(function() {
+      (2 + 2).should.equal(5);
+    }, 0);
+    setTimeout(function() {
+      done();
+    }, 10);
+  });
 });

spec/runner_spec.rb

@@ -89,6 +89,20 @@
            'error'           => {'message' => 'this one errors out', 'name' => 'Error'}}}
       end
 
+      let(:error_async) do
+        {'event' => 'fail',
+         'type'  => 'test',
+         'data'  => {
+           'title'           => 'errors asynchronously',
+           'fullTitle'       => 'failure errors asynchronously',
+           'parentFullTitle' => 'failure',
+           'status'          => 'failed',
+           'path'            => 'failing_spec.js',
+           # Accept anything for 'message' since async errors have URLs, which
+           # vary on every run, and line #, which may change in Chai releases.
+           'error'           => {'message' => anything(), 'name' => 'Error'}}}
+      end
+
       let(:pass) do
         {'event' => 'pass',
          'type'  => 'test',
@@ -122,6 +136,7 @@
         subject.reporter.should_receive(:process_mocha_event).with(test)
         subject.reporter.should_receive(:process_mocha_event).with(failure)
         subject.reporter.should_receive(:process_mocha_event).with(error)
+        subject.reporter.should_receive(:process_mocha_event).with(error_async)
         subject.reporter.should_receive(:process_mocha_event).with(pass)
         subject.reporter.should_receive(:process_mocha_event).with(pending)
         subject.reporter.should_receive(:process_mocha_event).with(end_event)