test: move getTTYfd() to common helpers
This utility is fairly generic and likely useful for more than one test. PR-URL: https://github.com/nodejs/node/pull/18800 Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Anna Henningsen <anna@addaleax.net>
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@ -679,6 +679,12 @@ The realpath of the testing temporary directory.
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Deletes and recreates the testing temporary directory.
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### getTTYfd()
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Attempts to get a valid TTY file descriptor. Returns `-1` if it fails.
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The TTY file descriptor is assumed to be capable of being writable.
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## WPT Module
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The wpt.js module is a port of parts of
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@ -775,6 +775,23 @@ exports.crashOnUnhandledRejection = function() {
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(err) => process.nextTick(() => { throw err; }));
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};
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exports.getTTYfd = function getTTYfd() {
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// Do our best to grab a tty fd.
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const tty = require('tty');
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// Don't attempt fd 0 as it is not writable on Windows.
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// Ref: ef2861961c3d9e9ed6972e1e84d969683b25cf95
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const ttyFd = [1, 2, 4, 5].find(tty.isatty);
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if (ttyFd === undefined) {
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try {
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return fs.openSync('/dev/tty');
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} catch (e) {
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// There aren't any tty fd's available to use.
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return -1;
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}
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}
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return ttyFd;
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};
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// Hijack stdout and stderr
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const stdWrite = {};
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function hijackStdWritable(name, listener) {
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@ -3,26 +3,9 @@
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const common = require('../common');
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const assert = require('assert').strict;
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/* eslint-disable no-restricted-properties */
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const { openSync } = require('fs');
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const tty = require('tty');
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const { WriteStream } = require('tty');
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// Do our best to grab a tty fd.
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function getTTYfd() {
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const ttyFd = [1, 2, 4, 5].find(tty.isatty);
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if (ttyFd === undefined) {
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try {
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return openSync('/dev/tty');
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} catch (e) {
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// There aren't any tty fd's available to use.
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return -1;
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}
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}
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return ttyFd;
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}
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const fd = getTTYfd();
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const fd = common.getTTYfd();
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// Give up if we did not find a tty
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if (fd === -1)
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