Handle the file argument properly

[yb66]

The argument is a file path but is called file and yet it's treated as a string.
If passed an actual File or a Pathname it will be properly handled.

[tenderlove]

@yb66 do you mind adding a test for this?

[MSP-Greg]

@yb66

Windows behaves a bit differently with file handles. The test below passes CI:

def test_filename_to_path
  tf = Tempfile.new 'thing'
  pn = Pathname tf.path
  db = SQLite3::Database.new pn
  assert_equal pn.expand_path.to_s, File.expand_path(db.filename)
ensure
  tf.close! if tf
end

[yb66]

Thanks @MSP-Greg.

Regards,
iain