public void Get_ServiceReturnsNumber_CorrectResponseProvided()
{
// ARRANGE
string word = "word";
int numberOfCharacters = 4;
string expectedResponse = $"The word '{word}' contains {numberOfCharacters} characters.";
Mock <ICountCharactersService> mock = new Mock <ICountCharactersService>();
mock
.Setup(m => m.CountCharacters(It.IsAny <string>()))
.Returns(numberOfCharacters);
DummyController controller = new DummyController(mock.Object);
// ACT
IActionResult response = controller.Get(word);
// ASSERT
Assert.IsType <OkObjectResult>(response);
OkObjectResult okResponse = (OkObjectResult)response;
Assert.IsType <string>(okResponse.Value);
string content = (string)okResponse.Value;
Assert.Equal(expectedResponse, content);
}