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var common = require('../common');
var assert = require('assert');
var exec = require('child_process').exec;
var success_count = 0;
var error_count = 0;

exec("ls /", function (err, stdout, stderr) {
  if (err) {
    error_count++;
    console.log("error!: " + err.code);
    console.log("stdout: " + JSON.stringify(stdout));
    console.log("stderr: " + JSON.stringify(stderr));
    assert.equal(false, err.killed);
  } else {
    success_count++;
    console.dir(stdout);
  }
});


exec("ls /DOES_NOT_EXIST", function (err, stdout, stderr) {
  if (err) {
    error_count++;
    assert.equal("", stdout);
    assert.equal(true, err.code != 0);
    assert.equal(false, err.killed);
    assert.strictEqual(null, err.signal);
    console.log("error code: " + err.code);
    console.log("stdout: " + JSON.stringify(stdout));
    console.log("stderr: " + JSON.stringify(stderr));
  } else {
    success_count++;
    console.dir(stdout);
    assert.equal(true, stdout != "");
  }
});



var sleeperStart = new Date();
exec("sleep 3", { timeout: 50 }, function (err, stdout, stderr) {
  var diff = (new Date()) - sleeperStart;
  console.log("sleep 3 with timeout 50 took %d ms", diff);
  assert.ok(diff < 500);
  assert.ok(err);
  assert.ok(err.killed);
  assert.equal(err.signal, 'SIGTERM');
});




var startSleep3 = new Date();
var killMeTwice = exec("sleep 3", { timeout: 1000 }, killMeTwiceCallback);

process.nextTick(function(){
  console.log("kill pid %d", killMeTwice.pid); 
  // make sure there is no race condition in starting the process
  // the PID SHOULD exist directly following the exec() call.
  assert.equal('number', typeof killMeTwice._internal.pid);
  // Kill the process 
  killMeTwice.kill();
});

function killMeTwiceCallback(err, stdout, stderr) {
  var diff  = (new Date()) - startSleep3;
  // We should have already killed this process. Assert that
  // the timeout still works and that we are getting the proper callback
  // parameters.
  assert.ok(err);
  assert.ok(err.killed);
  assert.equal(err.signal, 'SIGTERM');

  // the timeout should still be in effect
  console.log("'sleep 3' was already killed. Took %d ms", diff);
  assert.ok(diff < 1500);
}



exec('python -c "print 200000*\'C\'"', { maxBuffer: 1000 }, function (err, stdout, stderr) {
  assert.ok(err);
  assert.ok(err.killed);
  assert.equal(err.signal, 'SIGTERM');
});

process.addListener("exit", function () {
  assert.equal(1, success_count);
  assert.equal(1, error_count);
});