const PositionUtil = require("./position_util"); test('can truncate string position to provided decimal places', () => { expect(PositionUtil.truncateDecimalPlaces("12.3456789", 0)).toBe("12"); expect(PositionUtil.truncateDecimalPlaces("12.3456789", 1)).toBe("12.3"); expect(PositionUtil.truncateDecimalPlaces("12.3456789", 2)).toBe("12.34"); expect(PositionUtil.truncateDecimalPlaces("12.3456789", 3)).toBe("12.345"); expect(PositionUtil.truncateDecimalPlaces("12.3456789", 4)).toBe("12.3456"); expect(PositionUtil.truncateDecimalPlaces("12.3456789", 5)).toBe("12.34567"); expect(PositionUtil.truncateDecimalPlaces("12.3456789", 6)).toBe("12.345678"); expect(PositionUtil.truncateDecimalPlaces("12.3456789", 7)).toBe("12.3456789"); expect(PositionUtil.truncateDecimalPlaces("12.3", 7)).toBe("12.3"); expect(PositionUtil.truncateDecimalPlaces(null, 2)).toBe(null); expect(PositionUtil.truncateDecimalPlaces("", 2)).toBe(""); expect(PositionUtil.truncateDecimalPlaces("12", 2)).toBe("12"); expect(PositionUtil.truncateDecimalPlaces("123", 2)).toBe("123"); expect(PositionUtil.truncateDecimalPlaces("1234.", 2)).toBe("1234"); }); test('can set integer position precision to provided bits', () => { // these tests are using the auckland sky tower position // auckland sky tower: -36.84844007222091, 174.76221115261924 // the outputs we are expecting, are the same values returned by the code in the meshtastic firmware // https://github.com/meshtastic/firmware/blob/0a93261c0646f93aea518cc0599e547e9dc0e997/src/modules/PositionModule.cpp#L187 // set precision to 32 bits (within 0 meters) // -36.8484400, 174.7622111 -> -36.8484400, 174.7622111 expect(PositionUtil.setPositionPrecision(-368484400, 32)).toBe(-368484400); expect(PositionUtil.setPositionPrecision(1747622111, 32)).toBe(1747622111); // set precision to 16 bits (within ~364 meters) // -36.8484400, 174.7622111 -> -36.8476160, 174.7615744 expect(PositionUtil.setPositionPrecision(-368484400, 16)).toBe(-368476160); expect(PositionUtil.setPositionPrecision(1747622111, 16)).toBe(1747615744); // set precision to 13 bits (within ~2.9 kilometers) // -36.8484400, 174.7622111 -> -36.8312320, 174.7714048 expect(PositionUtil.setPositionPrecision(-368484400, 13)).toBe(-368312320); expect(PositionUtil.setPositionPrecision(1747622111, 13)).toBe(1747714048); // set precision to 11 bits (within ~11.6 kilometers) // -36.8484400, 174.7622111 -> -36.8050176, 174.7976192 expect(PositionUtil.setPositionPrecision(-368484400, 11)).toBe(-368050176); expect(PositionUtil.setPositionPrecision(1747622111, 11)).toBe(1747976192); });