mirror of
https://github.com/nodejs/node.git
synced 2024-11-30 07:27:22 +01:00
1c84579031
When timeEnd() provided with label that doesn't exists it emits warning in the console, so developer get know about it. PR-URL: https://github.com/nodejs/node/pull/5901 Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
102 lines
2.6 KiB
JavaScript
102 lines
2.6 KiB
JavaScript
'use strict';
|
|
|
|
const util = require('util');
|
|
|
|
function Console(stdout, stderr) {
|
|
if (!(this instanceof Console)) {
|
|
return new Console(stdout, stderr);
|
|
}
|
|
if (!stdout || typeof stdout.write !== 'function') {
|
|
throw new TypeError('Console expects a writable stream instance');
|
|
}
|
|
if (!stderr) {
|
|
stderr = stdout;
|
|
} else if (typeof stderr.write !== 'function') {
|
|
throw new TypeError('Console expects writable stream instances');
|
|
}
|
|
|
|
var prop = {
|
|
writable: true,
|
|
enumerable: false,
|
|
configurable: true
|
|
};
|
|
prop.value = stdout;
|
|
Object.defineProperty(this, '_stdout', prop);
|
|
prop.value = stderr;
|
|
Object.defineProperty(this, '_stderr', prop);
|
|
prop.value = new Map();
|
|
Object.defineProperty(this, '_times', prop);
|
|
|
|
// bind the prototype functions to this Console instance
|
|
var keys = Object.keys(Console.prototype);
|
|
for (var v = 0; v < keys.length; v++) {
|
|
var k = keys[v];
|
|
this[k] = this[k].bind(this);
|
|
}
|
|
}
|
|
|
|
|
|
// As of v8 5.0.71.32, the combination of rest param, template string
|
|
// and .apply(null, args) benchmarks consistently faster than using
|
|
// the spread operator when calling util.format.
|
|
Console.prototype.log = function(...args) {
|
|
this._stdout.write(`${util.format.apply(null, args)}\n`);
|
|
};
|
|
|
|
|
|
Console.prototype.info = Console.prototype.log;
|
|
|
|
|
|
Console.prototype.warn = function(...args) {
|
|
this._stderr.write(`${util.format.apply(null, args)}\n`);
|
|
};
|
|
|
|
|
|
Console.prototype.error = Console.prototype.warn;
|
|
|
|
|
|
Console.prototype.dir = function(object, options) {
|
|
options = Object.assign({customInspect: false}, options);
|
|
this._stdout.write(`${util.inspect(object, options)}\n`);
|
|
};
|
|
|
|
|
|
Console.prototype.time = function(label) {
|
|
this._times.set(label, process.hrtime());
|
|
};
|
|
|
|
|
|
Console.prototype.timeEnd = function(label) {
|
|
const time = this._times.get(label);
|
|
if (!time) {
|
|
process.emitWarning(`No such label '${label}' for console.timeEnd()`);
|
|
return;
|
|
}
|
|
const duration = process.hrtime(time);
|
|
const ms = duration[0] * 1000 + duration[1] / 1e6;
|
|
this.log('%s: %sms', label, ms.toFixed(3));
|
|
this._times.delete(label);
|
|
};
|
|
|
|
|
|
Console.prototype.trace = function trace(...args) {
|
|
// TODO probably can to do this better with V8's debug object once that is
|
|
// exposed.
|
|
var err = new Error();
|
|
err.name = 'Trace';
|
|
err.message = util.format.apply(null, args);
|
|
Error.captureStackTrace(err, trace);
|
|
this.error(err.stack);
|
|
};
|
|
|
|
|
|
Console.prototype.assert = function(expression, ...args) {
|
|
if (!expression) {
|
|
require('assert').ok(false, util.format.apply(null, args));
|
|
}
|
|
};
|
|
|
|
|
|
module.exports = new Console(process.stdout, process.stderr);
|
|
module.exports.Console = Console;
|