node/test/simple/test-process-kill-null.js

var assert = require('assert');
var spawn = require('child_process').spawn;

var cat = spawn('cat');
var called;

process.kill(cat.pid, 0);

cat.stdout.on('data', function(){
  called = true;
  process.kill(cat.pid, 'SIGKILL');
});

// EPIPE when null sig fails
cat.stdin.write('test');

process.on('exit', function(){
  assert.ok(called);
});