text: import pytest
  from threedi_api_client import ThreediApiClient
  
  
  def test_init_threedi_api_client_from_env_file(tmpdir):
      env_file = tmpdir / "env_file"
      with open(str(env_file), "w") as f:
          f.write("API_HOST=localhost:8000/v3.0\n")
          f.write("API_USERNAME=username\n")
          f.write("API_PASSWORD=password\n")
      with pytest.warns(UserWarning):
          ThreediApiClient(env_file=str(env_file))
  
  
  def test_init_threedi_api_client_from_env_vars(monkeypatch):
      monkeypatch.setenv("API_HOST", "localhost:8000/v3.0")
      monkeypatch.setenv("API_USERNAME", "username")
      monkeypatch.setenv("API_PASSWORD", "password")
      with pytest.warns(UserWarning):
          ThreediApiClient()
  
  
  def test_init_threedi_api_client_from_config():
      config = {
          "API_HOST": "localhost:8000/v3.0",
          "API_USERNAME": "username",
          "API_PASSWORD": "password",
      }
      with pytest.warns(UserWarning):
          ThreediApiClient(config=config)
  
  
  def test_init_threedi_api_client_without_version():
      config = {
          "API_HOST": "localhost:8000",
          "API_USERNAME": "username",
          "API_PASSWORD": "password",
      }
      with pytest.raises(ValueError):
          ThreediApiClient(config=config)
  