orphan disk search update

tests/test-orphan-disks.py

@@ -82,12 +82,13 @@ class ReportTests(unittest.TestCase):
         self.assertEqual(len(coverage), 3)
         self.assertNotIn('/nodes/b/storage/shared/content', calls)
 
-    def test_csv_preserves_warnings_and_refuses_overwrite(self):
+    def test_csv_omits_warnings_and_refuses_overwrite(self):
         path = self.root / 'report.csv'
-        disks.export_csv(path, [], ['node offline'])
-        self.assertIn('node offline', path.read_text())
+        disks.export_csv(path, [])
+        self.assertNotIn('coverage_warnings', path.read_text())
+        self.assertEqual(len(path.read_text().splitlines()), 1)
         with self.assertRaises(FileExistsError):
-            disks.export_csv(path, [], [])
+            disks.export_csv(path, [])
 
     def test_disk_sizes_in_display_and_csv(self):
         for index, (size, expected) in enumerate([
@@ -103,7 +104,7 @@ class ReportTests(unittest.TestCase):
                     disks.render([row], [], [])
                 self.assertIn('Disk size: ' + expected, output.getvalue())
                 path = self.root / f'sizes-{index}.csv'
-                disks.export_csv(path, [row], [])
+                disks.export_csv(path, [row])
                 with path.open(newline='') as handle:
                     exported = next(csv.DictReader(handle))
                 self.assertEqual(exported['disk_size'], expected)
@@ -135,7 +136,7 @@ class ReportTests(unittest.TestCase):
             disks.render(rows, warnings, coverage)
         self.assertIn('Disk size: ~25.91 GiB', output.getvalue())
         path = self.root / 'approximate.csv'
-        disks.export_csv(path, rows, warnings)
+        disks.export_csv(path, rows)
         with path.open(newline='') as handle:
             exported = list(csv.DictReader(handle))
         self.assertEqual([row['disk_size'] for row in exported],