dlms-protocol/tests/DlmsUint8.test.js

DLMS Protocol parser for JavaScript

import DlmsUint8 from "../src/typesDLMS/DlmsUint8";
import DlmsDataType from "../src/enum/DlmsDataType";

describe("DlmsUint8 class", () => {
    test("should initialize with default values when no data is provided", () => {
        const dlmsUint8 = new DlmsUint8();

        expect(dlmsUint8.tag).toBe(DlmsDataType.UINT8);
        expect(dlmsUint8.totalBytes).toBe(0);
        expect(dlmsUint8.rawValue).toEqual([]);
        expect(dlmsUint8.bodyBytes).toEqual([]);
        expect(dlmsUint8.value).toBe(0);
    });

    test("should correctly initialize from a byte array", () => {
        const data = [DlmsDataType.UINT8, 0x7F]; // UINT8 tag and value (127)
        const dlmsUint8 = new DlmsUint8(data);

        expect(dlmsUint8.tag).toBe(DlmsDataType.UINT8);
        expect(dlmsUint8.totalBytes).toBe(2);
        expect(dlmsUint8.rawValue).toEqual([DlmsDataType.UINT8, 0x7F]);
        expect(dlmsUint8.bodyBytes).toEqual([0x7F]);
        expect(dlmsUint8.value).toBe(127);
    });

    test("should throw an error if tag does not match when inserting data", () => {
        const data = [0xFF, 0x7F]; // Invalid tag
        const dlmsUint8 = new DlmsUint8();

        expect(() => dlmsUint8.insertData(data)).toThrow("Tag mismatch.");
    });

    test("should correctly initialize from a numeric value", () => {
        const dlmsUint8 = new DlmsUint8(200);

        expect(dlmsUint8.tag).toBe(DlmsDataType.UINT8);
        expect(dlmsUint8.totalBytes).toBe(2);
        expect(dlmsUint8.rawValue).toEqual([DlmsDataType.UINT8, 0xC8]); // 200 in hexadecimal
        expect(dlmsUint8.bodyBytes).toEqual([0xC8]);
        expect(dlmsUint8.value).toBe(200);
    });

    test("should return the correct standard length", () => {
        const dlmsUint8 = new DlmsUint8();
        expect(dlmsUint8.getStandardLength()).toBe(2);
    });

    test("should return the correct value with getValue()", () => {
        const data = [DlmsDataType.UINT8, 0x05];
        const dlmsUint8 = new DlmsUint8(data);

        expect(dlmsUint8.getValue()).toBe(5);
    });

    test("should correctly insert data from a byte array", () => {
        const dlmsUint8 = new DlmsUint8();
        dlmsUint8.insertData([DlmsDataType.UINT8, 0x0A]);

        expect(dlmsUint8.tag).toBe(DlmsDataType.UINT8);
        expect(dlmsUint8.totalBytes).toBe(2);
        expect(dlmsUint8.rawValue).toEqual([DlmsDataType.UINT8, 0x0A]);
        expect(dlmsUint8.bodyBytes).toEqual([0x0A]);
        expect(dlmsUint8.value).toBe(10);
    });

    test("should correctly insert data from a numeric value", () => {
        const dlmsUint8 = new DlmsUint8();
        dlmsUint8.insertDataFromValue(45);

        expect(dlmsUint8.tag).toBe(DlmsDataType.UINT8);
        expect(dlmsUint8.totalBytes).toBe(2);
        expect(dlmsUint8.rawValue).toEqual([DlmsDataType.UINT8, 0x2D]); // 45 in hexadecimal
        expect(dlmsUint8.bodyBytes).toEqual([0x2D]);
        expect(dlmsUint8.value).toBe(45);
    });
});