tty.js
No OneTemporary
Actions

Size

4 KB

Referenced Files

None

Subscribers

None

tty.js
View Options

	import { test, testThrows, summary } from './helpers.js';
	import * as tty from 'node:tty';

	console.log('TTY Tests\n');

	test('tty module exists', typeof tty, 'object');
	test('tty toStringTag', Object.prototype.toString.call(tty), '[object tty]');
	test('tty.isatty is function', typeof tty.isatty, 'function');
	test('tty.ReadStream is function', typeof tty.ReadStream, 'function');
	test('tty.WriteStream is function', typeof tty.WriteStream, 'function');

	test('tty.isatty(-1) is false', tty.isatty(-1), false);
	test('tty.isatty(0) is boolean', typeof tty.isatty(0), 'boolean');
	test('tty.isatty(1) is boolean', typeof tty.isatty(1), 'boolean');
	test('tty.isatty(2) is boolean', typeof tty.isatty(2), 'boolean');

	test('stdin has fd', typeof process.stdin.fd, 'number');
	test('stdout has fd', typeof process.stdout.fd, 'number');
	test('stderr has fd', typeof process.stderr.fd, 'number');

	test('stdin toStringTag', Object.prototype.toString.call(process.stdin), '[object ReadStream]');
	test('stdout toStringTag', Object.prototype.toString.call(process.stdout), '[object WriteStream]');
	test('stderr toStringTag', Object.prototype.toString.call(process.stderr), '[object WriteStream]');

	test('stdin.setRawMode is function', typeof process.stdin.setRawMode, 'function');
	test('stdout.clearLine is function', typeof process.stdout.clearLine, 'function');
	test('stdout.clearScreenDown is function', typeof process.stdout.clearScreenDown, 'function');
	test('stdout.cursorTo is function', typeof process.stdout.cursorTo, 'function');
	test('stdout.moveCursor is function', typeof process.stdout.moveCursor, 'function');
	test('stdout.getWindowSize is function', typeof process.stdout.getWindowSize, 'function');
	test('stdout.getColorDepth is function', typeof process.stdout.getColorDepth, 'function');
	test('stdout.hasColors is function', typeof process.stdout.hasColors, 'function');

	const ws = process.stdout.getWindowSize();
	test('getWindowSize returns array', Array.isArray(ws), true);
	test('getWindowSize length is 2', ws.length, 2);
	test('getWindowSize cols is number', typeof ws[0], 'number');
	test('getWindowSize rows is number', typeof ws[1], 'number');

	const depthDefault = process.stdout.getColorDepth();
	test('getColorDepth returns number', typeof depthDefault, 'number');
	test('getColorDepth returns valid depth', [1, 4, 8, 24].includes(depthDefault), true);

	const depthForced = process.stdout.getColorDepth({ FORCE_COLOR: '3' });
	test('getColorDepth(force truecolor) = 24', depthForced, 24);
	const depthNoColor = process.stdout.getColorDepth({ NO_COLOR: '1' });
	test('getColorDepth(NO_COLOR) = 1', depthNoColor, 1);

	test('hasColors() returns boolean', typeof process.stdout.hasColors(), 'boolean');
	test('hasColors(force truecolor) supports 16m', process.stdout.hasColors(16777216, { FORCE_COLOR: '3' }), true);
	test('hasColors(NO_COLOR) rejects 16 colors', process.stdout.hasColors(16, { NO_COLOR: '1' }), false);

	const clearLineResult = process.stdout.clearLine(0);
	test('clearLine returns stream', clearLineResult, process.stdout);
	const clearDownResult = process.stdout.clearScreenDown();
	test('clearScreenDown returns stream', clearDownResult, process.stdout);
	const cursorToResult = process.stdout.cursorTo(0);
	test('cursorTo returns stream', cursorToResult, process.stdout);
	const moveCursorResult = process.stdout.moveCursor(0, 0);
	test('moveCursor returns stream', moveCursorResult, process.stdout);

	if (process.stdin.isTTY) {
	const stdinCtor = new tty.ReadStream(0);
	test('new ReadStream(0) returns stdin-like stream', Object.prototype.toString.call(stdinCtor), '[object ReadStream]');
	test('ReadStream constructor reuses stdin stream', stdinCtor === process.stdin, true);

	const rawResult = process.stdin.setRawMode(false);
	test('stdin.setRawMode returns this', rawResult, process.stdin);
	test('stdin.isRaw is boolean', typeof process.stdin.isRaw, 'boolean');
	} else {
	testThrows('new ReadStream(0) throws when stdin is not TTY', () => new tty.ReadStream(0));
	}

	if (process.stdout.isTTY) {
	const stdoutCtor = new tty.WriteStream(1);
	test('new WriteStream(1) returns stdout-like stream', Object.prototype.toString.call(stdoutCtor), '[object WriteStream]');
	test('WriteStream constructor reuses stdout stream', stdoutCtor === process.stdout, true);
	} else {
	testThrows('new WriteStream(1) throws when stdout is not TTY', () => new tty.WriteStream(1));
	}

	if (process.stderr.isTTY) {
	const stderrCtor = new tty.WriteStream(2);
	test('new WriteStream(2) returns stderr-like stream', Object.prototype.toString.call(stderrCtor), '[object WriteStream]');
	test('WriteStream constructor reuses stderr stream', stderrCtor === process.stderr, true);
	} else {
	testThrows('new WriteStream(2) throws when stderr is not TTY', () => new tty.WriteStream(2));
	}

	summary();

File Metadata

Mime Type: application/javascript
Expires: Thu, Mar 26, 4:41 PM (1 d, 23 h)
Storage Engine: blob
Storage Format: Raw Data
Storage Handle: 511801
Default Alt Text: tty.js (4 KB)

Event Timeline