node/test/parallel/test-error-reporting.js

// Copyright Joyent, Inc. and other Node contributors.
//
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//
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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'use strict';
const common = require('../common');
const assert = require('assert');
const exec = require('child_process').exec;
const path = require('path');

function errExec(script, callback) {
  const cmd = `"${process.argv[0]}" "${path.join(common.fixturesDir, script)}"`;
  return exec(cmd, function(err, stdout, stderr) {
    // There was some error
    assert.ok(err);

    // More than one line of error output.
    assert.ok(stderr.split('\n').length > 2);

    // Assert the script is mentioned in error output.
    assert.ok(stderr.includes(script));

    // Proxy the args for more tests.
    callback(err, stdout, stderr);
  });
}


// Simple throw error
errExec('throws_error.js', common.mustCall(function(err, stdout, stderr) {
  assert.ok(/blah/.test(stderr));
}));


// Trying to JSON.parse(undefined)
errExec('throws_error2.js', common.mustCall(function(err, stdout, stderr) {
  assert.ok(/SyntaxError/.test(stderr));
}));


// Trying to JSON.parse(undefined) in nextTick
errExec('throws_error3.js', common.mustCall(function(err, stdout, stderr) {
  assert.ok(/SyntaxError/.test(stderr));
}));


// throw ILLEGAL error
errExec('throws_error4.js', common.mustCall(function(err, stdout, stderr) {
  assert.ok(/\/\*\*/.test(stderr));
  assert.ok(/SyntaxError/.test(stderr));
}));

// Specific long exception line doesn't result in stack overflow
errExec('throws_error5.js', common.mustCall(function(err, stdout, stderr) {
  assert.ok(/SyntaxError/.test(stderr));
}));

// Long exception line with length > errorBuffer doesn't result in assertion
errExec('throws_error6.js', common.mustCall(function(err, stdout, stderr) {
  assert.ok(/SyntaxError/.test(stderr));
}));

// Object that throws in toString() doesn't print garbage
errExec('throws_error7.js', common.mustCall(function(err, stdout, stderr) {
  assert.ok(/<toString\(\) threw exception/.test(stderr));
}));