Add math.inf to all_time_ratio calculation

src/tribler/core/components/libtorrent/download_manager/download_state.py

@@ -4,6 +4,7 @@
 Author(s): Arno Bakker
 """
 import logging
+import math
 from typing import Optional
 
 from tribler.core.components.libtorrent.utils.libtorrent_helper import libtorrent
@@ -33,7 +34,7 @@ class DownloadState:
     cf. libtorrent torrent_status
     """
 
-    def __init__(self, download, lt_status: Optional[libtorrent.torrent_status], error):
+    def __init__(self, download, lt_status: Optional[libtorrent.torrent_status], error: Optional = None):
         """
         Internal constructor.
         @param download The download this state belongs too.
@@ -156,8 +157,12 @@ def total_payload_download(self) -> int:
     def get_all_time_ratio(self) -> float:
         """ Returns the accumulated seeding ratio of the download across multiple sessions.
         """
-        if not self.lt_status or not self.all_time_download:
+        if not self.lt_status:
             return 0
+
+        if not self.all_time_download:
+            return 0 if not self.all_time_upload else math.inf
+
         return self.all_time_upload / self.all_time_download
 
     def get_seeding_time(self):

src/tribler/core/components/libtorrent/tests/test_download_state.py

@@ -1,3 +1,4 @@
+import math
 from unittest.mock import Mock
 
 import pytest
@@ -61,7 +62,6 @@ def test_getters_setters_2(mock_download, mock_lt_status):
 
     assert download_state.all_time_upload == 200
     assert download_state.all_time_download == 1000
-    assert download_state.get_all_time_ratio() == 0.2
 
     assert download_state.get_eta() == 0.25
     assert download_state.get_num_seeds_peers() == (5, 5)
@@ -79,6 +79,51 @@ def test_getters_setters_2(mock_download, mock_lt_status):
     assert download_state.get_progress() == 0.75
 
 
+def test_all_time_ratio_no_lt_status():
+    # Test when lt_status is None
+    state = DownloadState(
+        download=Mock(),
+        lt_status=None,
+    )
+    assert state.get_all_time_ratio() == 0
+
+
+def test_all_time_ratio():
+    # Test all time ratio formula
+    state = DownloadState(
+        download=Mock(),
+        lt_status=Mock(
+            all_time_upload=200,
+            all_time_download=1000,
+        ),
+    )
+    assert state.get_all_time_ratio() == 0.2
+
+
+def test_all_time_ratio_no_all_time_download():
+    # Test all time ratio formula when all_time_download is 0 and all_time_upload is 0
+    state = DownloadState(
+        download=Mock(),
+        lt_status=Mock(
+            all_time_upload=0,
+            all_time_download=0,
+        ),
+    )
+    assert state.get_all_time_ratio() == 0
+
+
+def test_all_time_ratio_no_all_time_download_inf():
+    # Test all time ratio formula when all_time_download is 0 and all_time_upload is not 0
+    state = DownloadState(
+        download=Mock(),
+        lt_status=Mock(
+            all_time_upload=200,
+            all_time_download=0,
+        ),
+    )
+    assert state.get_all_time_ratio() == math.inf
+
+
 def test_get_files_completion(mock_download, mock_tdef):
     """
     Testing whether the right completion of files is returned

src/tribler/gui/widgets/downloadsdetailstabwidget.py

@@ -1,3 +1,4 @@
+import math
 import operator
 from enum import IntEnum
 from pathlib import PurePosixPath
@@ -174,8 +175,9 @@ def update_pages(self, new_download=False):
         all_time_upload = format_size(self.current_download['all_time_upload'])
         all_time_download = format_size(self.current_download['all_time_download'])
         all_time_ratio = self.current_download['all_time_ratio']
+        all_time_ratio = '∞' if all_time_ratio == math.inf else f'{all_time_ratio:.3f}'
         self.window().download_detail_ratio_label.setText(
-            f"{all_time_ratio:.3f}, upload: {all_time_upload}, download: {all_time_download}"
+            f"{all_time_ratio}, upload: {all_time_upload}, download: {all_time_download}"
         )
 
         self.window().download_detail_availability_label.setText(f"{self.current_download['availability']:.2f}")

src/tribler/gui/widgets/downloadwidgetitem.py

@@ -1,4 +1,5 @@
 import logging
+import math
 from datetime import datetime
 from typing import Dict, Optional
 
@@ -96,7 +97,11 @@ def update_item(self):
         self.setText(5, f"{self.download_info['num_connected_peers']} ({self.download_info['num_peers']})")
         self.setText(6, format_speed(self.download_info["speed_down"]))
         self.setText(7, format_speed(self.download_info["speed_up"]))
-        self.setText(8, f"{float(self.download_info['all_time_ratio']):.3f}")
+
+        all_time_ratio = self.download_info['all_time_ratio']
+        all_time_ratio = '∞' if all_time_ratio == math.inf else f'{all_time_ratio:.3f}'
+        self.setText(8, all_time_ratio)
+
         self.setText(9, "yes" if self.download_info["anon_download"] else "no")
         self.setText(10, str(self.download_info["hops"]) if self.download_info["anon_download"] else "-")
         self.setText(12, datetime.fromtimestamp(int(self.download_info["time_added"])).strftime('%Y-%m-%d %H:%M'))