public void NavigateBack()
 {
     history.Setup(i => i.Pop()).Returns("Bar");
     sut.NavigateToPriorPage();
     Assert.Equal("Bar", sut.Content);
     history.Verify(i => i.Pop(), Times.Once);
     history.VerifyNoOtherCalls();
 }
        public void DefaultBackNavigationDoesNothing()
        {
            sut.NavigateTo("Foo");
            var str = "content";

            sut.NavigateTo(str);
            sut.NavigateToPriorPage();
            Assert.Equal(str, sut.Content);
        }