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'use strict';
const common = require('../common');
const assert = require('assert');
const spawn = require('child_process').spawn;
const child = spawn(process.execPath, ['debug']);
child.stderr.setEncoding('utf8');
const expectedUsageMessage = `Usage: node debug script.js
node debug <host>:<port>
node debug -p <pid>
`;
var actualUsageMessage = '';
child.stderr.on('data', function(data) {
actualUsageMessage += data.toString();
});
child.on('exit', common.mustCall(function(code) {
assert.strictEqual(code, 1);
assert.strictEqual(actualUsageMessage, expectedUsageMessage);
}));