Add symlink test for local checkout of cable

tests/test_workdir.py

@@ -85,16 +85,25 @@ def revision_log_file(self) -> Path:
     def pbs_job_file(self, request) -> Path:
         return Path(request.param)
 
-    def test_clean_realisation_files(self, src_path, revision_log_file):
-        """Success case: directory tree does not exist after clean."""
+    def test_clean_realisation_files(
+        self, src_path: Path, tmp_path: Path, revision_log_file: Path
+    ):
+        """Success case: Realisation files created by benchcab are removed after clean."""
         src_path.mkdir()
+        cable_symlink = src_path / "main"
+        # tmp_path contains the path being symlinked
+        local_cable_src_path = tmp_path / "CABLE"
+        local_cable_src_path.mkdir()
+        cable_symlink.symlink_to(local_cable_src_path)
         revision_log_file.touch()
         clean_realisation_files()
+
+        assert local_cable_src_path.exists()
         assert not src_path.exists()
         assert not revision_log_file.exists()
 
     def test_clean_submission_files(self, runs_path, pbs_job_file):
-        """Success case: log files in project root directory do not exist after clean."""
+        """Success case: Submission files created by benchcab are removed after clean."""
         runs_path.mkdir()
         pbs_job_file.touch()
         clean_submission_files()