public void MockUrlHelper()
{
//Arrange
var expectedPath = "~/Path/To/File";
var expectedContent = "<p>Fake content here<p>";
var urlHelperMock = new Mock <UrlHelper>();
urlHelperMock
.Setup(m => m.Content(expectedPath))
.Returns(expectedContent)
.Verifiable();
var sut = new ExampleController();
sut.Url = urlHelperMock.Object; //Set mock UrlHelper
//Act
var actualContent = sut.GetContent();
//Assert
urlHelperMock.Verify();
Assert.AreEqual(expectedContent, actualContent);
}