dlms-protocol/tests/DlmsDateTime.test.js

DLMS Protocol parser for JavaScript

import DlmsDateTime from "../src/typesDLMS/DlmsDateTime";

describe("DlmsDateTime class", () => {
    test("should initialize from a Date object", () => {
        const date = new Date(2023, 4, 15, 14, 30, 45); // 15 May 2023, 14:30:45
        const dlmsDateTime = new DlmsDateTime(date);

        expect(dlmsDateTime.yearHighbyte).toBe(0x07); // 2023 in hex: 0x07E7
        expect(dlmsDateTime.yearLowbyte).toBe(0xE7);
        expect(dlmsDateTime.month).toBe(5); // May
        expect(dlmsDateTime.dayOfMonth).toBe(15);
        expect(dlmsDateTime.dayOfWeek).toBe(1); // Monday
        expect(dlmsDateTime.hour).toBe(14);
        expect(dlmsDateTime.minute).toBe(30);
        expect(dlmsDateTime.second).toBe(45);
        expect(dlmsDateTime.hundredthsOfSecond).toBe(0xff);
        expect(dlmsDateTime.deviationHighbyte).toBe(0x80);
        expect(dlmsDateTime.deviationLowbyte).toBe(0x00);
        expect(dlmsDateTime.clockStatus).toBe(0x00);
        expect(dlmsDateTime.value).toBe("2023-05-15 17:30:45");
    });

    test("should initialize from a byte array", () => {
        const bytes = [
            0x07, 0xE7, // Year 2023
            0x05, // May
            0x15, // 21th
            0x01, // Monday
            0x14, // 20 hours
            0x1E, // 30 minutes
            0x2D, // 45 seconds
            0xFF, // Hundredths of second
            0x00, 0x80, // Deviation
            0x00, // Clock status
        ];

        const dlmsDateTime = new DlmsDateTime(bytes);

        expect(dlmsDateTime.yearHighbyte).toBe(0x07);
        expect(dlmsDateTime.yearLowbyte).toBe(0xE7);
        expect(dlmsDateTime.month).toBe(0x05);
        expect(dlmsDateTime.dayOfMonth).toBe(0x15); // Matches the byte array
        expect(dlmsDateTime.dayOfWeek).toBe(0x01); // Monday
        expect(dlmsDateTime.hour).toBe(0x14);
        expect(dlmsDateTime.minute).toBe(0x1E);
        expect(dlmsDateTime.second).toBe(0x2D);
        expect(dlmsDateTime.valueTime).toEqual(new Date(2023, 4, 21, 20, 30, 45));
        expect(dlmsDateTime.value).toBe("21/05/2023 20:30");
    });

    test("should throw an error if byte array length is less than 12", () => {
        const bytes = [0x07, 0xE7, 0x05, 0x15]; // Incomplete byte array
        expect(() => new DlmsDateTime(bytes)).toThrow("Invalid byte array length");
    });

    test("should throw an error for invalid day of the week", () => {
        const dlmsDateTime = new DlmsDateTime();
        expect(() => dlmsDateTime.getDayOfWeekValue(8)).toThrow("Invalid day of the week");
    });

    test("should return the correct date with getValue()", () => {
        const date = new Date(2023, 4, 15, 14, 30, 45);
        const dlmsDateTime = new DlmsDateTime(date);
        expect(dlmsDateTime.getValue()).toEqual(date);
    });

    test("should return the correct byte representation with getBytes()", () => {
        const date = new Date(2023, 4, 15, 14, 30, 45);
        const dlmsDateTime = new DlmsDateTime(date);

        const expectedBytes = [
            0x07, 0xE7, // Year 2023
            0x05, // May
            0x0F, // 15th
            0x01, // Monday
            0x0E, // 14 hours
            0x1E, // 30 minutes
            0x2D, // 45 seconds
            0xFF, // Hundredths of second
            0x80, 0x00, // Deviation
            0x00, // Clock status
        ];

        expect(dlmsDateTime.getBytes()).toEqual(expectedBytes);
    });
});