dlms-protocol/tests/ActionResponse.test.js

DLMS Protocol parser for JavaScript

import ActionResponse from "../src/messages/ActionResponse";
import MessageType from "../src/enum/MessageType";
import DlmsDatas from "../src/typesDLMS/DlmsDatas";

jest.mock("../src/typesDLMS/DlmsDatas");

describe("ActionResponse class", () => {
    beforeEach(() => {
        DlmsDatas.factory.mockClear();
    });

    const mockDlmsData = {
        rawValue: [0x12, 0x34, 0x56],
        insertData: jest.fn(),
    };

    DlmsDatas.factory.mockReturnValue(mockDlmsData);

    test("should initialize with default values when no bytes are provided", () => {
        const actionResponse = new ActionResponse();

        expect(actionResponse.SetType).toBeNull();
        expect(actionResponse.InvokeIdAndPriority).toBeNull();
        expect(actionResponse.DataAcessResult).toBeNull();
        expect(actionResponse.ReturnParameters).toBeNull();
        expect(actionResponse.ParameterType).toBeNull();
        expect(actionResponse.DlmsData).toBeNull();
        expect(actionResponse.GetDataAcessResult).toBeNull();
        expect(actionResponse.Value).toBeNull();
    });

    test("should correctly parse bytes with ReturnParameters = 0", () => {
        const bytes = [MessageType.ACTION_RESPONSE, 0x01, 0xC3, 0x00, 0x00];
        const actionResponse = new ActionResponse(bytes);

        expect(actionResponse.SetType).toBe(0x01);
        expect(actionResponse.InvokeIdAndPriority).toBe(0xC3);
        expect(actionResponse.DataAcessResult).toBe(0x00);
        expect(actionResponse.ReturnParameters).toBe(0x00);
        expect(actionResponse.ParameterType).toBeNull();
        expect(actionResponse.DlmsData).toBeNull();
        expect(actionResponse.GetDataAcessResult).toBeNull();
        expect(actionResponse.Value).toEqual(bytes);
    });

    test("should correctly parse bytes with ParameterType = 0 (DlmsData)", () => {
        const bytes = [
            MessageType.ACTION_RESPONSE,
            0x01,
            0xC3,
            0x00,
            0x01,
            0x00, // ParameterType
            0x12, // DlmsData type
            0x34,
            0x56,
        ];
        const actionResponse = new ActionResponse(bytes);

        expect(actionResponse.SetType).toBe(0x01);
        expect(actionResponse.InvokeIdAndPriority).toBe(0xC3);
        expect(actionResponse.DataAcessResult).toBe(0x00);
        expect(actionResponse.ReturnParameters).toBe(0x01);
        expect(actionResponse.ParameterType).toBe(0x00);
        expect(actionResponse.DlmsData).toEqual(mockDlmsData);
        expect(mockDlmsData.insertData).toHaveBeenCalledWith([0x12, 0x34, 0x56]);
        expect(actionResponse.GetDataAcessResult).toBeNull();
    });

    test("should correctly parse bytes with ParameterType != 0 (GetDataAcessResult)", () => {
        const bytes = [
            MessageType.ACTION_RESPONSE,
            0x01,
            0xC3,
            0x00,
            0x01,
            0x01, // ParameterType
            0x05, // GetDataAcessResult
        ];
        const actionResponse = new ActionResponse(bytes);

        expect(actionResponse.SetType).toBe(0x01);
        expect(actionResponse.InvokeIdAndPriority).toBe(0xC3);
        expect(actionResponse.DataAcessResult).toBe(0x00);
        expect(actionResponse.ReturnParameters).toBe(0x01);
        expect(actionResponse.ParameterType).toBe(0x01);
        expect(actionResponse.DlmsData).toBeNull();
        expect(actionResponse.GetDataAcessResult).toBe(0x05);
    });

    test("should return the correct byte array with getBytes()", () => {
        const bytes = [
            MessageType.ACTION_RESPONSE,
            0x01,
            0xC3,
            0x00,
            0x01,
            0x00, // ParameterType
            0x12, 0x34, 0x56, // DlmsData rawValue
        ];
        const actionResponse = new ActionResponse(bytes);
        const result = actionResponse.getBytes();

        expect(result).toEqual(Buffer.from(bytes));
    });

    test("should return the correct hexadecimal string with getHexString()", () => {
        const bytes = [
            MessageType.ACTION_RESPONSE,
            0x01,
            0xC3,
            0x00,
            0x01,
            0x00, // ParameterType
            0x12, 0x34, 0x56, // DlmsData rawValue
        ];
        const actionResponse = new ActionResponse(bytes);
        const hexString = actionResponse.getHexString();

        const expectedHex = bytes
            .map(byte => byte.toString(16).toUpperCase().padStart(2, "0"))
            .join(" ");

        expect(hexString).toBe(expectedHex);
    });
});