electron/spec/api-ipc-spec.js

'use strict';

const assert = require('assert');
const path = require('path');

const ipcRenderer = require('electron').ipcRenderer;
const remote = require('electron').remote;

const ipcMain = remote.require('electron').ipcMain;
const BrowserWindow = remote.require('electron').BrowserWindow;

const comparePaths = function(path1, path2) {
  if (process.platform === 'win32') {
    path1 = path1.toLowerCase();
    path2 = path2.toLowerCase();
  }
  assert.equal(path1, path2);
};

describe('ipc module', function() {
  var fixtures = path.join(__dirname, 'fixtures');

  describe('remote.require', function() {
    it('should returns same object for the same module', function() {
      var dialog1 = remote.require('electron');
      var dialog2 = remote.require('electron');
      assert.equal(dialog1, dialog2);
    });

    it('should work when object contains id property', function() {
      var a = remote.require(path.join(fixtures, 'module', 'id.js'));
      assert.equal(a.id, 1127);
    });

    it('should search module from the user app', function() {
      comparePaths(path.normalize(remote.process.mainModule.filename), path.resolve(__dirname, 'static', 'main.js'));
      comparePaths(path.normalize(remote.process.mainModule.paths[0]), path.resolve(__dirname, 'static', 'node_modules'));
    });
  });

  describe('remote.createFunctionWithReturnValue', function() {
    it('should be called in browser synchronously', function() {
      var buf = new Buffer('test');
      var call = remote.require(path.join(fixtures, 'module', 'call.js'));
      var result = call.call(remote.createFunctionWithReturnValue(buf));
      assert.equal(result.constructor.name, 'Buffer');
    });
  });

  describe('remote object in renderer', function() {
    it('can change its properties', function() {
      var property = remote.require(path.join(fixtures, 'module', 'property.js'));
      assert.equal(property.property, 1127);
      property.property = 1007;
      assert.equal(property.property, 1007);
      var property2 = remote.require(path.join(fixtures, 'module', 'property.js'));
      assert.equal(property2.property, 1007);
      property.property = 1127;
    });

    it('can construct an object from its member', function() {
      var call = remote.require(path.join(fixtures, 'module', 'call.js'));
      var obj = new call.constructor;
      assert.equal(obj.test, 'test');
    });
  });

  describe('remote value in browser', function() {
    var print = path.join(fixtures, 'module', 'print_name.js');

    it('keeps its constructor name for objects', function() {
      var buf = new Buffer('test');
      var print_name = remote.require(print);
      assert.equal(print_name.print(buf), 'Buffer');
    });

    it('supports instanceof Date', function() {
      var now = new Date();
      var print_name = remote.require(print);
      assert.equal(print_name.print(now), 'Date');
      assert.deepEqual(print_name.echo(now), now);
    });
  });

  describe('remote promise', function() {
    it('can be used as promise in each side', function(done) {
      var promise = remote.require(path.join(fixtures, 'module', 'promise.js'));
      promise.twicePromise(Promise.resolve(1234)).then(function(value) {
        assert.equal(value, 2468);
        done();
      });
    });
  });

  describe('remote webContents', function() {
    it('can return same object with different getters', function() {
      var contents1 = remote.getCurrentWindow().webContents;
      var contents2 = remote.getCurrentWebContents();
      assert(contents1 == contents2);
    });
  });

  describe('remote class', function() {
    let cl = remote.require(path.join(fixtures, 'module', 'class.js'));
    let base = cl.base;
    let derived = cl.derived;

    it('can get methods', function() {
      assert.equal(base.method(), 'method');
    });

    it('can get properties', function() {
      assert.equal(base.readonly, 'readonly');
    });

    it('can change properties', function() {
      assert.equal(base.value, 'old');
      base.value = 'new';
      assert.equal(base.value, 'new');
      base.value = 'old';
    });

    it('has unenumerable methods', function() {
      assert(!base.hasOwnProperty('method'));
      assert(Object.getPrototypeOf(base).hasOwnProperty('method'));
    });

    it('keeps prototype chain in derived class', function() {
      assert.equal(derived.method(), 'method');
      assert.equal(derived.readonly, 'readonly');
      assert(!derived.hasOwnProperty('method'));
      let proto = Object.getPrototypeOf(derived);
      assert(!proto.hasOwnProperty('method'));
      assert(Object.getPrototypeOf(proto).hasOwnProperty('method'));
    });
  });

  describe('ipc.sender.send', function() {
    it('should work when sending an object containing id property', function(done) {
      var obj = {
        id: 1,
        name: 'ly'
      };
      ipcRenderer.once('message', function(event, message) {
        assert.deepEqual(message, obj);
        done();
      });
      ipcRenderer.send('message', obj);
    });

    it('can send instance of Date', function(done) {
      const currentDate = new Date();
      ipcRenderer.once('message', function(event, value) {
        assert.equal(value, currentDate.toISOString());
        done();
      });
      ipcRenderer.send('message', currentDate);
    });
  });

  describe('ipc.sendSync', function() {
    it('can be replied by setting event.returnValue', function() {
      var msg = ipcRenderer.sendSync('echo', 'test');
      assert.equal(msg, 'test');
    });

    it('does not crash when reply is not sent and browser is destroyed', function(done) {
      this.timeout(10000);

      var w = new BrowserWindow({
        show: false
      });
      ipcMain.once('send-sync-message', function(event) {
        event.returnValue = null;
        w.destroy();
        done();
      });
      w.loadURL('file://' + path.join(fixtures, 'api', 'send-sync-message.html'));
    });
  });

  describe('remote listeners', function() {
    var w = null;

    afterEach(function() {
      w.destroy();
    });

    it('can be added and removed correctly', function() {
      w = new BrowserWindow({
        show: false
      });
      var listener = function() {};
      w.on('test', listener);
      assert.equal(w.listenerCount('test'), 1);
      w.removeListener('test', listener);
      assert.equal(w.listenerCount('test'), 0);
    });
  });
});