Shouldly.ShouldAssertException : task.Result.ShouldBeFalse();
            }
        }

        [Fact]
        public void CanDownloadToFolder()
        {
            using (TestEnvironment testEnvironment = TestEnvironment.Create())
            {
                TransientTestFolder folder = testEnvironment.CreateFolder(createFolder: false);

                DownloadFile downloadFile = new DownloadFile
                {
                    BuildEngine = _mockEngine,
                    TaskEnvironment = TaskEnvironmentHelper.CreateForTest(),
                    DestinationFolder = new TaskItem(folder.Path),
                    HttpMessageHandler = new MockHttpMessageHandler((message, token) => new HttpResponseMessage(HttpStatusCode.OK)
                    {
                        Content = new StringContent("Success!"),
                        RequestMessage = new HttpRequestMessage(HttpMethod.Get, "http://success/foo.txt")
                    }),
                    SourceUrl = "http://success/foo.txt"
                };

                downloadFile.Execute()
    should be
True
    but was
False