public async Task GivenTestInput_WhenDeleteDocument_ShouldSucceed()
        {
            // Arrange
            var sut = new DocumentsServiceLocal();

            // Act
            var response = await sut.Delete("imag3.png");

            // Assert
            response.ShouldBeTrue();
        }
        public async Task GivenTestInput_WhenGetDocumentCount_ShouldAgree()
        {
            // Arrange
            var sut = new DocumentsServiceLocal();

            // Act
            var response = await sut.Count();

            // Assert
            response.ShouldBe(3);
        }
        public async Task GivenTestInput_WhenGetDocument_ShouldMatch()
        {
            // Arrange
            var sut = new DocumentsServiceLocal();

            // Act
            var response = await sut.Get("Fred.txt");

            // Assert
            response.ShouldNotBeNull();
            response.Length.ShouldBeGreaterThan(0);
        }
        public async Task GivenTestInput_WhenGetDocumentList_ShouldMatch()
        {
            // Arrange
            var sut = new DocumentsServiceLocal();

            // Act
            var response = await sut.ListAll();

            // Assert
            response.ShouldBe(new List <string> {
                "dummy.pdf", "Fred.txt", "image.png"
            });
        }