not doing paths right at the beginning, will hurt in the long run

tests/integration/test_integration.py

 #!/usr/bin/env python
 from click.testing import CliRunner
-import os
+from pathlib import Path
 
 
-def test__main__py():
+def test__main__py(tmp_path):
     import saqc.__main__
 
     # if not run from project root
-    projpath = os.path.dirname(saqc.__file__) + "/../"
+    projpath = Path(saqc.__file__).parents[1]
     args = [
         "--config",
-        projpath + "ressources/data/config.csv",
+        Path(projpath, "ressources/data/config.csv"),
         "--data",
-        projpath + "ressources/data/data.csv",
+        Path(projpath, "ressources/data/data.csv"),
         "--outfile",
-        "/tmp/test.csv",  # the filesystem temp dir
+        Path(tmp_path, "test.csv"),  # the filesystem temp dir
     ]
     runner = CliRunner()
-
     for scheme in ["float", "positional", "dmp", "simple"]:
         result = runner.invoke(saqc.__main__.main, args + ["--scheme", scheme])
         assert result.exit_code == 0, result.output