public void ExistsWrongTest(string key, string value)
        {
            // Align
            var facts = new FactsBase();
            // Act
            var resultOfAdd = facts.Add("test_key_1", "test_value_1");
            var actual      = facts.Exists(key, value);

            // Assert
            Assert.True(resultOfAdd);
            Assert.False(actual);
        }
        public void ExistsTest()
        {
            // Align
            var facts = new FactsBase();
            var today = DateTime.Today;
            // Act
            var resultOfAdd = facts.Add(today.DayOfYear.ToString(), today.ToString());
            var actual      = facts.Exists(today.DayOfYear.ToString(), today.ToString());

            // Assert
            Assert.True(resultOfAdd);
            Assert.True(actual);
        }