return true/false if clean was performed

lbry/blob/disk_space_manager.py

@@ -28,7 +28,7 @@ class DiskSpaceManager:
 
     def clean(self):
         if not self.config.blob_storage_limit:
-            return
+            return False
         used = 0
         files = []
         data_dir = os.path.join(self.config.data_dir, 'blobfiles')
@@ -39,11 +39,14 @@ class DiskSpaceManager:
                 files.append((file_stats.st_mtime, file_stats.st_size, file.path))
         files.sort()
         available = (self.config.blob_storage_limit*1024*1024) - used
+        cleaned = False
         for _, file_size, file in files:
             available += file_size
             if available > 0:
                 break
             os.remove(file)
+            cleaned = True
+        return cleaned
 
     async def cleaning_loop(self):
         while self.running:

tests/unit/blob/test_disk_space_manager.py

@@ -24,6 +24,7 @@ class ConfigurationTests(unittest.TestCase):
                 with open(os.path.join(config.data_dir, 'blobfiles', f'3mb-{file_no}'), 'w') as blob:
                     blob.write('0' * 1 * 1024 * 1024)
             self.assertEqual(10, dsm.space_used_mb)
-            dsm.clean()
+            self.assertTrue(dsm.clean())
             self.assertEqual(5, dsm.space_used_mb)
+            self.assertFalse(dsm.clean())