import json
import os


def assert_(value, expected):
  if value != expected:
    print("assert failed:", value, expected)
    Exit(1)


env = Environment(toolpath=[os.environ.get('EMSCRIPTEN_TOOL_PATH')])
env['ENV'] = dict()

env.Tool('emscripten')

AddOption(
  '--expected-env',
  dest='expected',
  type='string',
  nargs=1,
  action='store',
  help='JSON with the expected environment parameters',
)

expected_env = json.loads(GetOption('expected'))
expected_env_env = expected_env.pop('ENV')

for key in expected_env_env:
  assert_(env['ENV'].get(key), expected_env_env[key])

for key in expected_env:
  assert_(env.get(key), expected_env[key])

Exit(0)