Wait until all threads started by the test have finished

spyder_unittest/tests/conftest.py

@@ -10,6 +10,10 @@
 available for integration tests.
 """
 
+# Standard library import
+import os
+import threading
+
 # Third-party imports
 from qtpy.QtWidgets import QApplication
 import pytest
@@ -24,11 +28,15 @@
 from spyder.app import start
 from spyder.config.manager import CONF
 
+# Time to wait until the IPython console is ready to receive input
+# (in milliseconds)
+SHELL_TIMEOUT = 40000 if os.name == 'nt' else 20000
+
 SPYDER6 = spyder_version_info[0] == 6
 
 
 @pytest.fixture
-def main_window(monkeypatch):
+def main_window(monkeypatch, qtbot):
     """Main Window fixture"""
 
     if not SPYDER6:
@@ -42,10 +50,29 @@ def main_window(monkeypatch):
 
     # Start the window
     window = start.main()
+    qtbot.addWidget(window)
     QApplication.processEvents()
 
+    # Store all current threads
+    if os.name != 'nt':
+        # _DummyThread are created if current_thread() is called from them.
+        # They will always leak (From python doc) so we ignore them.
+        init_threads = [
+            repr(thread) for thread in threading.enumerate()
+            if not isinstance(thread, threading._DummyThread)]
+
+    # Yield so that test can run
     yield window
 
+    # Wait until all threads started by the test have finished
+    def threads_condition():
+        threads = [
+            thread for thread in threading.enumerate()
+            if not isinstance(thread, threading._DummyThread)]
+        return (len(init_threads) >= len(threads))
+
+    qtbot.waitUntil(threads_condition, timeout=SHELL_TIMEOUT)
+
     # Close main window
     window.closing(close_immediately=True)
     window.close()