public void read_a_fixture_failure()
        {
            var exception = new NotImplementedException();

            builder.LogFixtureFailure("bad fixture", exception);

            FixtureGraph fixture = builder.Library.FixtureFor("bad fixture");

            fixture.AllErrors().Count().ShouldEqual(1);

            GrammarError error = fixture.AllErrors().First();

            error.Message.ShouldEqual("Fixture 'bad fixture' could not be loaded");
            error.ErrorText.ShouldEqual(exception.ToString());
        }