47 lines
1.4 KiB
JavaScript
47 lines
1.4 KiB
JavaScript
|
import { HtmlStream } from '~/streaming/html_stream';
|
||
|
|
import { ChunkWriter } from '~/streaming/chunk_writer';
|
||
|
|
|
||
|
|
jest.mock('~/streaming/chunk_writer');
|
||
|
|
|
||
|
|
describe('HtmlStream', () => {
|
||
|
|
let write;
|
||
|
|
let close;
|
||
|
|
let streamingElement;
|
||
|
|
|
||
|
|
beforeEach(() => {
|
||
|
|
write = jest.fn();
|
||
|
|
close = jest.fn();
|
||
|
|
jest.spyOn(Document.prototype, 'write').mockImplementation(write);
|
||
|
|
jest.spyOn(Document.prototype, 'close').mockImplementation(close);
|
||
|
|
jest.spyOn(Document.prototype, 'querySelector').mockImplementation(() => {
|
||
|
|
streamingElement = document.createElement('div');
|
||
|
|
return streamingElement;
|
||
|
|
});
|
||
|
|
});
|
||
|
|
|
||
|
|
it('attaches to original document', () => {
|
||
|
|
// eslint-disable-next-line no-new
|
||
|
|
new HtmlStream(document.body);
|
||
|
|
expect(document.body.contains(streamingElement)).toBe(true);
|
||
|
|
});
|
||
|
|
|
||
|
|
it('can write to a document', () => {
|
||
|
|
const htmlStream = new HtmlStream(document.body);
|
||
|
|
htmlStream.write('foo');
|
||
|
|
htmlStream.close();
|
||
|
|
expect(write.mock.calls).toEqual([['<streaming-element>'], ['foo'], ['</streaming-element>']]);
|
||
|
|
expect(close).toHaveBeenCalledTimes(1);
|
||
|
|
});
|
||
|
|
|
||
|
|
it('returns chunked writer', () => {
|
||
|
|
const htmlStream = new HtmlStream(document.body).withChunkWriter();
|
||
|
|
expect(htmlStream).toBeInstanceOf(ChunkWriter);
|
||
|
|
});
|
||
|
|
|
||
|
|
it('closes on abort', () => {
|
||
|
|
const htmlStream = new HtmlStream(document.body);
|
||
|
|
htmlStream.abort();
|
||
|
|
expect(close).toHaveBeenCalled();
|
||
|
|
});
|
||
|
|
});
|