'use strict';

const tape = require('tape');

const common = require('../common');

function containsLine(lines, re) {

return lines.some(line => re.test(line.trim()));

}

tape('usage messages', (t) => {

t.timeoutAfter(30000);

const sess = common.Session.create('inspect-scenario.js');

sess.waitBreak((err) => {

t.error(err);

sess.send('v8 print');

});

sess.stderr.linesUntil(/USAGE/, (err, lines) => {

t.error(err);

const re = /^error: USAGE: v8 print expr$/;

t.ok(containsLine(lines, re), 'print usage message');

sess.send('v8 findjsinstances');

});

sess.stderr.linesUntil(/USAGE/, (err, lines) => {

t.error(err);

const re = /^error: USAGE: v8 findjsinstances \[flags\] instance_name$/;

t.ok(containsLine(lines, re), 'findjsinstances usage message');

sess.send('v8 findrefs');

});

sess.stderr.linesUntil(/USAGE/, (err, lines) => {

t.error(err);

const re = /^error: USAGE: v8 findrefs expr$/;

t.ok(containsLine(lines, re), 'findrefs usage message');

sess.quit();

t.end();

});

});