node/test/mjsunit/test-file-cat-noexist.js

include("mjsunit.js");
var got_error = false;

function onLoad () {
  var dirname = node.path.dirname(__filename);
  var fixtures = node.path.join(dirname, "fixtures");
  var filename = node.path.join(fixtures, "does_not_exist.txt");
  var promise = node.fs.cat(filename, "raw");
  
  promise.addCallback(function (content) {
    node.debug("cat returned some content: " + content);
    node.debug("this shouldn't happen as the file doesn't exist...");
    assertTrue(false);
  });

  promise.addErrback(function () {
    got_error = true;
  });
}

function onExit () {
  assertTrue(got_error);
}