barcode-tool/src/components/getSupportedFormats/getSupportedFormat.test.ts

lightweight npm package that facilitates barcode generation and detection. It leverages the Barcode Detection API for barcode scanning directly in web browsers and provides an intuitive interface for generating various barcode formats. Seamlessly integrat

import { getSupportedFormats } from './getSupportedFormats';

// Mock the BarcodeDetector with a static method
const mockBarcodeDetector = {
    getSupportedFormats: jest.fn().mockResolvedValue(['ean_13', 'qr_code']),
};

describe('getSupportedFormats', () => {
    afterEach(() => {
        jest.clearAllMocks();
    });

    it('should return an array of supported formats when BarcodeDetector is supported', async() => {
        // Mock BarcodeDetector API
        (window as any).BarcodeDetector = mockBarcodeDetector;

        const supportedFormats = await getSupportedFormats();
        expect(supportedFormats).toEqual({
            detector: ['ean_13', 'qr_code'],
            generator: [
                "CODE39",
                "CODE128", "CODE128A", "CODE128B", "CODE128C",
                "EAN13", "EAN8", "EAN5", "EAN2", "UPC", "UPCE",
                "ITF14",
                "ITF",
                "MSI", "MSI10", "MSI11", "MSI1010", "MSI1110",
                "pharmacode",
                "codabar",
                "GenericBarcode",
            ],
        });
    });

    it('should return an empty array for detector formats when BarcodeDetector is not supported', async() => {
        delete (window as any).BarcodeDetector;

        const supportedFormats = await getSupportedFormats();
        expect(supportedFormats.detector).toEqual([]);
    });

    it('should return generator formats even when BarcodeDetector is not supported', async() => {
        delete (window as any).BarcodeDetector;

        const supportedFormats = await getSupportedFormats();
        expect(supportedFormats.generator).toEqual([
            "CODE39",
            "CODE128", "CODE128A", "CODE128B", "CODE128C",
            "EAN13", "EAN8", "EAN5", "EAN2", "UPC", "UPCE",
            "ITF14",
            "ITF",
            "MSI", "MSI10", "MSI11", "MSI1010", "MSI1110",
            "pharmacode",
            "codabar",
            "GenericBarcode",
        ]);
    });

    it('should throw an error when BarcodeDetector throws an error', async() => {
        // Mock BarcodeDetector API to throw an error
        (window as any).BarcodeDetector = {
            getSupportedFormats: jest.fn().mockRejectedValue(new Error('Failed to get supported formats')),
        };

        await expect(getSupportedFormats()).rejects.toThrowError('Failed to get supported formats');
    });
});