pen/test/test-socket-client.js

A better Markdown previewer

import assert from "assert";
import fs from "fs";
import helper from "./lib/helper";
import http from "http";
import MarkdownSocket from "../src/markdown-socket";
import SocketClient from "../src/frontend/socket-client";

describe("SocketClient", () => {
  let server;
  let mdSocket;

  beforeEach(done => {
    helper.makeDirectory("md-root");
    helper.createFile("md-root/test.md", "# hello");
    server = http.createServer((req, res) => res.end("hello"));
    mdSocket = new MarkdownSocket(helper.path("md-root"));
    mdSocket.listenTo(server);
    server.listen(1234, done);
  });

  afterEach(done => {
    helper.clean();
    mdSocket.close();
    server.close(done);
  });

  it("receives HTML data sent from a Markdown socket server", done => {
    let client = new SocketClient({
      host: "localhost:1234",
      pathname: "/test.md"
    });
    client.onData(html => {
      assert.equal(html, '<h1 id="hello">hello</h1>\n');
      done();
    });
  });

  it("receives the data whenever the file is updated", done => {
    const callback = err => {
      if (err) {
        done(err);
      }
    };

    let called = 0;
    let client = new SocketClient({
      host: "localhost:1234",
      pathname: "/test.md"
    });
    client.onData(html => {
      switch (called) {
        case 0:
          assert.equal(html, '<h1 id="hello">hello</h1>\n');
          fs.writeFile(
            helper.path("md-root/test.md"),
            "```js\nvar a=10;\n```",
            callback
          );
          break;
        case 1:
          assert.equal(
            html,
            '<pre><code class="hljs language-js"><span class="hljs-keyword">var</span> a=<span class="hljs-number">10</span>;\n</code></pre>\n'
          );
          fs.writeFile(
            helper.path("md-root/test.md"),
            "* nested\n  * nnested\n    * nnnested",
            callback
          );
          break;
        case 2:
          assert.equal(
            html,
            "<ul>\n<li>nested\n<ul>\n<li>nnested\n<ul>\n<li>nnnested</li>\n</ul>\n</li>\n</ul>\n</li>\n</ul>\n"
          );
          done();
          break;
      }
      called += 1;
    });
  });
});