public void ExistsTest_SuccessFalse()
        {
            // arrange
            DashboardFileFactory target = new DashboardFileFactory();
            DashboardFile file = target.CreateFile(this.contents, this.filename);

            // act
            bool actual = target.Exists(file);

            // assert
            Assert.IsFalse(actual);
        }
        public void ExistsTest_FailureParamFile()
        {
            // arrange
            DashboardFileFactory target = new DashboardFileFactory();

            // act
            try
            {
                target.Exists(null);
                Assert.Fail("exception not thrown");
            }
            catch (ArgumentNullException)
            {
            }
            catch
            {
                Assert.Fail("Invalid exception");
            }
        }