fn store_operation_test_get_adjacent_sample_at_timestamp()

in below/store/src/advance.rs [529:601]

• 56 lines of code
• 2 McCabe index (conditional complexity)

    fn store_operation_test_get_adjacent_sample_at_timestamp() {
        let mut store = FakeStore::new();

        macro_rules! check_sample {
            ($query:tt, $direction:expr, $expected_sample:expr) => {
                let timestamp = util::get_system_time($query);
                let res =
                    store.get_adjacent_sample_at_timestamp(timestamp, $direction, &get_logger());
                assert_eq!(
                    store
                        .to_model(&res.expect("Failed to get sample"))
                        .expect("Failed to convert sample to model"),
                    $expected_sample
                );
            };
            ($query:tt, $direction:expr) => {
                let timestamp = util::get_system_time($query);
                let res =
                    store.get_adjacent_sample_at_timestamp(timestamp, $direction, &get_logger());
                assert!(res.is_none());
            };
        }

        // case 1: timestamp at the available sample
        for direction in [Direction::Forward, Direction::Reverse] {
            // [3, 10, 20, 50]
            check_sample!(
                10, /*query*/
                direction,
                "3_10_10_7" /*old_new_timestamp_duraion*/
            );
        }

        // case 2: timestamp between two available samples
        // [3, 10, 20, 50]
        check_sample!(
            7, /*query*/
            Direction::Forward,
            "3_10_10_7" /*old_new_timestamp_duraion*/
        );

        check_sample!(
            7, /*query*/
            Direction::Reverse,
            "3_3" /*new_timestamp*/
        );

        check_sample!(
            12, /*query*/
            Direction::Reverse,
            "3_10_10_7" /*old_new_timestamp_duraion*/
        );

        // case 3: timestamp before first sample
        // [3, 10, 20, 50]
        check_sample!(
            0, /*query*/
            Direction::Forward,
            "3_3" /*new_timestamp*/
        );

        check_sample!(0 /*query*/, Direction::Reverse);

        // case 4: timestamp after the last sample
        // [3, 10, 20, 50]
        check_sample!(
            60, /*query*/
            Direction::Reverse,
            "20_50_50_30" /*old_new_timestamp_duraion*/
        );

        check_sample!(60 /*query*/, Direction::Forward);
    }