it('should fail output to a nonexistent directory', async () => {
   try {
     mockFs();
     const cr = new HtmlPdf.CreateResult('dGVzdA==');
     await cr.toFile('myDir/file.pdf');
     expect.fail();
   } catch (err) {
     expect(err.message).to.contain('no such file or directory');
   } finally {
     mockFs.restore();
   }
 });

function a() {
	mock({
		'path/to/fake/dir': {
			'some-file.txt': 'file content here',
			'empty-dir': {/** empty directory */}
		},
		'path/to/some.png': new Buffer([8, 6, 7, 5, 3, 0, 9]),
		'some/other/path': {/** another empty directory */}
	});

	// after a test runs
	mock.restore();
}

    it('should inline the external html file content', () => {
      const sourceText = '@Component({templateUrl: "some-file.html" })';

      const d = {
        '/path/to/dir': {
          'some-file.html': '<div>hello</div>',
          'some-file.scss': 'body { color: red; }',
          'some-file.ts': sourceText,
        },
      };
      mockFs(d);

      const results = inlineTemplate(sourceText, '/path/to/dir/some-file.ts');

      expect(results).toEqual(`@Component({template:/*ion-inline-start:"/path/to/dir/some-file.html"*/'<div>hello</div>'/*ion-inline-end:"/path/to/dir/some-file.html"*/ })`);
      mockFs.restore();
    });

function restoreRealFileSystem() {
  mockFs.restore();
}

 afterEach(() => {
   mockFs.restore();
 });

			after(function(){
				mock.restore();
			});