Test case for b2ParticleSystem.GetParticleCount() and b2ParticleSystem.GetPositionBuffer()

gistfile1.js

function TestCreateParticle() {
  var psd = new b2ParticleSystemDef();
  var particleSystem= world.CreateParticleSystem(psd);

  var expectedParticleCount = 50;
  for(var i = 0; i < expectedParticleCount; i++) {
    var pd = new b2ParticleDef();
    pd.position = new b2Vec2(i, 0);
    particleSystem.CreateParticle(pd);
  }

  var assertParticleCount = "Expected particle count: " + expectedParticleCount + " actual: " + particleSystem.GetParticleCount();
  var assertPositionBuffer = "Expected position buffer size: " + (expectedParticleCount * 2) + " actual: " + particleSystem.GetPositionBuffer().length;

  console.log(assertParticleCount);
  console.log(assertPositionBuffer);
}