asdf-games/node_modules/watchify/test/errors_transform.js

84 lines
2.3 KiB
JavaScript

var test = require('tape');
var watchify = require('../');
var browserify = require('browserify');
var vm = require('vm');
var fs = require('fs');
var path = require('path');
var mkdirp = require('mkdirp');
var through = require('through2');
var os = require('os');
var tmpdir = path.join((os.tmpdir || os.tmpDir)(), 'watchify-' + Math.random());
var main = path.join(tmpdir, 'main.js');
var file = path.join(tmpdir, 'dep.jsnum');
mkdirp.sync(tmpdir);
fs.writeFileSync(main, 'require("./dep.jsnum")');
fs.writeFileSync(file, 'console.log(555)');
function someTransform(file) {
if (!/\.jsnum$/.test(file)) {
return through();
}
function write (chunk, enc, next) {
if (/\d/.test(chunk)) {
this.push(chunk);
} else {
this.emit('error', new Error('No number in this chunk'));
}
next();
}
return through(write);
}
test('errors in transform', function (t) {
t.plan(6);
var b = browserify(main, watchify.args);
b.transform(someTransform);
var w = watchify(b);
w.bundle(function (err, src) {
t.ifError(err);
t.equal(run(src), '555\n');
breakTheBuild();
});
function breakTheBuild() {
setTimeout(function() {
fs.writeFileSync(file, 'console.log()');
}, 1000);
w.once('update', function () {
w.bundle(function (err, src) {
t.ok(err instanceof Error, 'should be error');
t.ok(/^No number in this chunk/.test(err.message));
fixTheBuild();
});
});
}
function fixTheBuild() {
setTimeout(function() {
fs.writeFileSync(file, 'console.log(333)');
}, 1000);
var safety = setTimeout(function() {
t.fail("gave up waiting");
w.close();
t.end();
}, 5000);
w.once('update', function () {
clearTimeout(safety);
w.bundle(function (err, src) {
t.ifError(err);
t.equal(run(src), '333\n');
w.close();
});
});
}
});
function run (src) {
var output = '';
function log (msg) { output += msg + '\n' }
vm.runInNewContext(src, { console: { log: log } });
return output;
}