obd-raw-data-parser/dist/src/__tests__/DTC-status.test.js

A lightweight TypeScript library for parsing OBD-II raw data into human readable format. Based on the excellent work of obd-utils by Nishkalkashyap.

import { DTCBaseDecoder } from "../index.js";
describe("DTC Status Tests", () => {
    const baseConfig = {
        logPrefix: "TEST",
    };
    describe("Status Byte Parsing", () => {
        const decoder = new DTCBaseDecoder({
            ...baseConfig,
            isCan: true,
            serviceMode: "03",
            troubleCodeType: "CURRENT",
        });
        test("should parse status byte with all flags set", () => {
            const status = decoder.parseDTCStatus(0xFF);
            expect(status).toEqual({
                milActive: true,
                dtcCount: 127,
                currentError: true,
                pendingError: true,
                confirmedError: true,
                egrSystem: true,
                oxygenSensor: true,
                catalyst: true,
            });
        });
        test("should parse status byte with no flags set", () => {
            const status = decoder.parseDTCStatus(0x00);
            expect(status).toEqual({
                milActive: false,
                dtcCount: 0,
                currentError: false,
                pendingError: false,
                confirmedError: false,
                egrSystem: false,
                oxygenSensor: false,
                catalyst: false,
            });
        });
        test("should parse status byte with only MIL active", () => {
            const status = decoder.parseDTCStatus(0x80);
            expect(status).toEqual({
                milActive: true,
                dtcCount: 0,
                currentError: false,
                pendingError: false,
                confirmedError: false,
                egrSystem: false,
                oxygenSensor: false,
                catalyst: false,
            });
        });
        test("should parse status byte with DTC count only", () => {
            const status = decoder.parseDTCStatus(0x03);
            expect(status).toEqual({
                milActive: false,
                dtcCount: 3,
                currentError: false,
                pendingError: false,
                confirmedError: false,
                egrSystem: false,
                oxygenSensor: false,
                catalyst: false,
            });
        });
        test("should parse status byte with specific error flags", () => {
            // Set current error and EGR system flags
            const status = decoder.parseDTCStatus(0x24);
            expect(status).toEqual({
                milActive: false,
                dtcCount: 4,
                currentError: true,
                pendingError: false,
                confirmedError: false,
                egrSystem: true,
                oxygenSensor: false,
                catalyst: false,
            });
        });
    });
    describe("Error Response Handling", () => {
        test("should handle service mode errors", () => {
            const decoder = new DTCBaseDecoder({
                ...baseConfig,
                isCan: true,
                serviceMode: "FF", // Invalid mode
                troubleCodeType: "CURRENT",
            });
            const response = [
                [48, 49, 48, 13, 48, 58, 52, 51, 48, 55, 48, 49, 48, 49, 48, 49, 49, 51, 13],
                [13, 62]
            ];
            const result = decoder.decodeDTCs(response);
            expect(result).toEqual([]);
        });
        test("should handle error frames", () => {
            const decoder = new DTCBaseDecoder({
                ...baseConfig,
                isCan: true,
                serviceMode: "03",
                troubleCodeType: "CURRENT",
            });
            const response = [
                // Error frame
                [55, 50, 51, 13], // "7" indicates error
                [13, 62]
            ];
            const result = decoder.decodeDTCs(response);
            expect(result).toEqual([]);
        });
    });
});