gypwatcher/test/test.js

Automatically run node-gyp when your module's C++ files change

"use strict";

const _ = require('lodash');
const ChildProcess = require('child_process');
const Path = require('path');
const GypWatcher = require('..');
const Module = require('./');

describe('GypWatcher', function() {

  let defaultConfig = newConfig();
  let watcher = new GypWatcher(defaultConfig);

  describe('#constructor', () => {

    it('should select the current working directory', () => process.cwd().should.be.eql(watcher.cwd));

    it('should set the config', () => watcher.config.should.be.eql(defaultConfig));

    it('should format watch files properly', () => {
      let config = newConfig({ watchFiles: [ './abc', '/etc' ] });
      let watcher = new GypWatcher(config);
      watcher.watchFiles.forEach(file => /^\//.test(file).should.be.ok);
    });

    it('should find a node-gyp executable', () => /node-gyp/.test(defaultConfig.nodeGypScript).should.be.ok);

    it('should have a node-gyp post function', () => {
      watcher.postExec.should.be.a.function;

      let config = newConfig({nodeGypPost: './postExec'});
      let watcher2 = new GypWatcher(config);
      watcher2.postExec.should.be.a.function;

      config = newConfig({nodeGypPost: null});
      let watcher3 = new GypWatcher(config);
      (null === watcher3.postExec).should.be.true;
    });

    it('should have initialized a watcher', () => watcher.watcher.should.be.an.object);

  });

  describe('#watch', () => {

    it('should begin watching the current directory', () => {
      watcher.watch();
    });

    it('should run node-gyp when the C++ files change', (done) => {
      this.timeout(5000);

      // cause C++ file to change
      ChildProcess.execSync('touch Module.cc', {cwd: watcher.cwd});

      // wait for node-gyp to finish running
      watcher.on('finished', () => {

        // check that post exec ran
        watcher.didRun.should.be.true;

        done();
      });
    });

  });

});

function newConfig(config) {
  return _.merge({}, require('../config'), require('./gypwatcher'), config);
}