@pdfme/pdf-lib/dist/esm/__tests__/core/objects/PDFNull.spec.js

Create and modify PDF files with JavaScript

import { PDFNull } from '../../../src/core';
import { toCharCode, typedArrayFor } from '../../../src/utils';
describe(`PDFNull`, () => {
    it(`cannot be publicly constructed`, () => {
        expect(() => new PDFNull()).toThrow();
    });
    it(`can be converted to null`, () => {
        expect(PDFNull.asNull()).toBe(null);
    });
    it(`can be cloned`, () => {
        expect(PDFNull.clone()).toBe(PDFNull);
    });
    it(`can be converted to a string`, () => {
        expect(String(PDFNull)).toBe('null');
    });
    it(`can provide its size in bytes`, () => {
        expect(PDFNull.sizeInBytes()).toBe(4);
    });
    it(`can be serialized`, () => {
        const buffer = new Uint8Array(8).fill(toCharCode(' '));
        expect(PDFNull.copyBytesInto(buffer, 3)).toBe(4);
        expect(buffer).toEqual(typedArrayFor('   null '));
    });
});
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