fn parse()

in rust/driver/snowflake/src/duration.rs [133:280]
148 lines of code
1 McCabe index (conditional complexity)

    fn parse() {
        assert_eq!(parse_duration("0"), Ok(Duration::from_secs(0)));
        assert_eq!(parse_duration("0000.0000s"), Ok(Duration::from_secs(0)));
        assert_eq!(parse_duration("5s"), Ok(Duration::from_secs(5)));
        assert_eq!(parse_duration("30s"), Ok(Duration::from_secs(30)));
        assert_eq!(parse_duration("1478s"), Ok(Duration::from_secs(1478)));
        assert_eq!(parse_duration("-5s"), Ok(Duration::from_secs(5)));
        assert_eq!(parse_duration("+5s"), Ok(Duration::from_secs(5)));
        assert_eq!(parse_duration("-0"), Ok(Duration::from_secs(0)));
        assert_eq!(parse_duration("+0"), Ok(Duration::from_secs(0)));
        assert_eq!(parse_duration("5.0s"), Ok(Duration::from_secs(5)));
        assert_eq!(
            parse_duration("5.6s"),
            Ok(Duration::from_secs(5) + Duration::from_millis(600))
        );
        assert_eq!(parse_duration("5.s"), Ok(Duration::from_secs(5)));
        assert_eq!(parse_duration(".5s"), Ok(Duration::from_millis(500)));
        assert_eq!(parse_duration("1.0s"), Ok(Duration::from_secs(1)));
        assert_eq!(parse_duration("1.00s"), Ok(Duration::from_secs(1)));
        assert_eq!(
            parse_duration("1.004s"),
            Ok(Duration::from_secs(1) + Duration::from_millis(4))
        );
        assert_eq!(
            parse_duration("1.0040s"),
            Ok(Duration::from_secs(1) + Duration::from_millis(4))
        );
        assert_eq!(
            parse_duration("100.00100s"),
            Ok(Duration::from_secs(100) + Duration::from_millis(1))
        );
        assert_eq!(parse_duration("10ns"), Ok(Duration::from_nanos(10)));
        assert_eq!(parse_duration("11us"), Ok(Duration::from_micros(11)));
        assert_eq!(parse_duration("12µs"), Ok(Duration::from_micros(12)));
        assert_eq!(parse_duration("12μs"), Ok(Duration::from_micros(12)));
        assert_eq!(parse_duration("13ms"), Ok(Duration::from_millis(13)));
        assert_eq!(parse_duration("14s"), Ok(Duration::from_secs(14)));
        assert_eq!(parse_duration("15m"), Ok(Duration::from_secs(60 * 15)));
        assert_eq!(parse_duration("16h"), Ok(Duration::from_secs(60 * 60 * 16)));
        assert_eq!(
            parse_duration("3h30m"),
            Ok(Duration::from_secs(60 * 60 * 3) + Duration::from_secs(60 * 30))
        );
        assert_eq!(
            parse_duration("10.5s4m"),
            Ok(Duration::from_secs(10) + Duration::from_millis(500) + Duration::from_secs(60 * 4))
        );
        assert_eq!(
            parse_duration("-2m3.4s"),
            Ok(Duration::from_secs(60 * 2) + Duration::from_secs(3) + Duration::from_millis(400))
        );
        assert_eq!(
            parse_duration("1h2m3s4ms5us6ns"),
            Ok(Duration::from_secs(60 * 60)
                + Duration::from_secs(60 * 2)
                + Duration::from_secs(3)
                + Duration::from_millis(4)
                + Duration::from_micros(5)
                + Duration::from_nanos(6))
        );
        assert_eq!(
            parse_duration("39h9m14.425s"),
            Ok(Duration::from_secs(60 * 60 * 39)
                + Duration::from_secs(60 * 9)
                + Duration::from_secs(14)
                + Duration::from_millis(425))
        );
        assert_eq!(
            parse_duration("52763797000ns"),
            Ok(Duration::from_nanos(52763797000))
        );
        assert_eq!(
            parse_duration("0.3333333333333333333h"),
            Ok(Duration::from_secs(60 * 20))
        );
        assert_eq!(
            parse_duration("9007199254740993ns"),
            Ok(Duration::from_nanos(9007199254740993))
        );
        assert_eq!(
            parse_duration("9223372036854775807ns"),
            Ok(Duration::from_nanos(9223372036854775807))
        );
        assert_eq!(
            parse_duration("9223372036854775.807us"),
            Ok(Duration::from_micros(9223372036854775) + Duration::from_nanos(807))
        );
        assert_eq!(
            parse_duration("9223372036s854ms775us807ns"),
            Ok(Duration::from_secs(9223372036)
                + Duration::from_millis(854)
                + Duration::from_micros(775)
                + Duration::from_nanos(807))
        );
        assert_eq!(
            parse_duration("-9223372036854775808ns"),
            Ok(Duration::from_nanos(9223372036854775808))
        );
        assert_eq!(
            parse_duration("-9223372036854775.808us"),
            Ok(Duration::from_micros(9223372036854775) + Duration::from_nanos(808))
        );
        assert_eq!(
            parse_duration("-9223372036s854ms775us808ns"),
            Ok(Duration::from_secs(9223372036)
                + Duration::from_millis(854)
                + Duration::from_micros(775)
                + Duration::from_nanos(808))
        );
        assert_eq!(
            parse_duration("-9223372036854775808ns"),
            Ok(Duration::from_nanos(9223372036854775808))
        );
        assert_eq!(
            parse_duration("-2562047h47m16.854775808s"),
            Ok(Duration::from_secs(60 * 60 * 2562047)
                + Duration::from_secs(60 * 47)
                + Duration::from_secs(16)
                + Duration::from_nanos(854775808))
        );
        assert_eq!(
            parse_duration("0.100000000000000000000h"),
            Ok(Duration::from_secs(60 * 6))
        );
        assert_eq!(
            parse_duration("0.830103483285477580700h"),
            Ok(Duration::from_secs(60 * 49)
                + Duration::from_secs(48)
                + Duration::from_nanos(372539828))
        );
        let bad_input = Err(invalid_arg("invalid duration (valid durations are a sequence of decimal numbers, each with optional fraction and a unit suffix, such as 300ms, 1.5h, 2h45m, valid time units are ns, us, ms, s, m, h)"));
        assert_eq!(parse_duration(""), bad_input);
        assert_eq!(parse_duration("3"), bad_input);
        assert_eq!(parse_duration("-"), bad_input);
        assert_eq!(parse_duration("s"), bad_input);
        assert_eq!(parse_duration("."), bad_input);
        assert_eq!(parse_duration("-."), bad_input);
        assert_eq!(parse_duration(".s"), bad_input);
        assert_eq!(parse_duration("+.s"), bad_input);
        assert_eq!(parse_duration("1d"), bad_input);
        assert_eq!(
            parse_duration("1.1ns"),
            Err(invalid_arg(
                "unexpected fractional part for duration with ns unit"
            ))
        );
        assert_eq!(parse_duration("9999999999999999h"), Err(overflow()));
    }