pdfkit/tests/unit/font.spec.js

import PDFFontFactory from '../../lib/font_factory';
import PDFDocument from '../../lib/document';

describe('EmbeddedFont', () => {
  test('no fontLayoutCache option', () => {
    const document = new PDFDocument();
    const font = PDFFontFactory.open(
      document,
      'tests/fonts/Roboto-Regular.ttf'
    );
    const runSpy = jest.spyOn(font, 'layoutRun');

    font.layout('test');
    font.layout('test');
    font.layout('test');
    font.layout('test');

    expect(runSpy).toBeCalledTimes(1);
  });

  test('fontLayoutCache = false', () => {
    const document = new PDFDocument({ fontLayoutCache: false });
    const font = PDFFontFactory.open(
      document,
      'tests/fonts/Roboto-Regular.ttf'
    );
    const runSpy = jest.spyOn(font, 'layoutRun');

    font.layout('test');
    font.layout('test');
    font.layout('test');
    font.layout('test');

    expect(runSpy).toBeCalledTimes(4);
  });

  describe('emebed', () => {
    test('sets BaseName based on font id and postscript name', () => {
      const document = new PDFDocument();
      const font = PDFFontFactory.open(
        document,
        'tests/fonts/Roboto-Regular.ttf',
        undefined,
        'F1099'
      );
      const dictionary = {
        end: () => {},
      };
      font.dictionary = dictionary;
      font.embed();

      expect(dictionary.data.BaseFont).toBe('BAJJZZ+Roboto-Regular');
    });
  });
});