#! /usr/bin/env python

import yt
from pathlib import Path

# This test shoots a beam of electrons at cubic embedded boundary geometry
# At time step 40, none of the particles have hit the boundary yet. At time
# step 60, all of them should have been absorbed by the boundary. In the
# absence of the cube, none of the particles would have had time to exit
# the problem domain yet.

# all particles are still there
if Path("particle_scrape_plt00040").is_dir():
    filename = "particle_scrape_plt00040"
else:
    filename = "Python_particle_scrape_plt00040"
ds40 = yt.load(filename)
np40 = ds40.index.particle_headers['electrons'].num_particles
assert(np40 == 612)

# all particles have been removed
if Path("particle_scrape_plt00060").is_dir():
    filename = "particle_scrape_plt00060"
else:
    filename = "Python_particle_scrape_plt00060"
ds60 = yt.load(filename)
np60 = ds60.index.particle_headers['electrons'].num_particles
assert(np60 == 0)