node/test/parallel/test-console-instance.js
Rich Trott 082cc8d6d8 test: remove unnecessary assignments
common.js needs to be loaded in all tests so that there is checking
for variable leaks and possibly other things. However, it does not
need to be assigned to a variable if nothing in common.js is referred
to elsewhere in the test.

PR-URL: https://github.com/nodejs/node/pull/4408
Reviewed-By: James M Snell <jasnell@gmail.com>
2015-12-26 18:00:02 -08:00

60 lines
1.3 KiB
JavaScript

'use strict';
require('../common');
var assert = require('assert');
var Stream = require('stream');
var Console = require('console').Console;
var called = false;
// ensure the Console instance doesn't write to the
// process' "stdout" or "stderr" streams
process.stdout.write = process.stderr.write = function() {
throw new Error('write() should not be called!');
};
// make sure that the "Console" function exists
assert.equal('function', typeof Console);
// make sure that the Console constructor throws
// when not given a writable stream instance
assert.throws(function() {
new Console();
}, /Console expects a writable stream/);
var out = new Stream();
var err = new Stream();
out.writable = err.writable = true;
out.write = err.write = function(d) {};
var c = new Console(out, err);
out.write = err.write = function(d) {
assert.equal(d, 'test\n');
called = true;
};
assert(!called);
c.log('test');
assert(called);
called = false;
c.error('test');
assert(called);
out.write = function(d) {
assert.equal('{ foo: 1 }\n', d);
called = true;
};
called = false;
c.dir({ foo: 1 });
assert(called);
// ensure that the console functions are bound to the console instance
called = 0;
out.write = function(d) {
called++;
assert.equal(d, called + ' ' + (called - 1) + ' [ 1, 2, 3 ]\n');
};
[1, 2, 3].forEach(c.log);
assert.equal(3, called);