text: """
  Tests for pygmt.which
  """
  import os
  
  import pytest
  
  from .. import which
  from ..helpers import unique_name
  
  
  def test_which():
      "Make sure which returns file paths for @files correctly without errors"
      for fname in ["tut_quakes.ngdc", "tut_bathy.nc"]:
          cached_file = which(f"@{fname}", download="c")
          assert os.path.exists(cached_file)
          assert os.path.basename(cached_file) == fname
  
  
  def test_which_fails():
      "which should fail with a FileNotFoundError"
      bogus_file = unique_name()
      with pytest.raises(FileNotFoundError):
          which(bogus_file)
  