1 files changed, 56 insertions, 0 deletions
diff --git a/tests/test_events.py b/tests/test_events.py
new file mode 100644
index 0000000..8f01a67
--- /dev/null
+++ b/tests/test_events.py
@@ -0,0 +1,56 @@
+"""Test the EventManager class."""
+
+import pytest
+
+from sphinx.errors import ExtensionError
+from sphinx.events import EventManager
+
+
+def test_event_priority():
+    result = []
+    events = EventManager(object())  # pass an dummy object as an app
+    events.connect('builder-inited', lambda app: result.append(1), priority = 500)
+    events.connect('builder-inited', lambda app: result.append(2), priority = 500)
+    events.connect('builder-inited', lambda app: result.append(3), priority = 200)  # eariler
+    events.connect('builder-inited', lambda app: result.append(4), priority = 700)  # later
+    events.connect('builder-inited', lambda app: result.append(5), priority = 500)
+
+    events.emit('builder-inited')
+    assert result == [3, 1, 2, 5, 4]
+
+
+class FakeApp:
+    def __init__(self, pdb: bool = False):
+        self.pdb = pdb
+
+
+def test_event_allowed_exceptions():
+    def raise_error(app):
+        raise RuntimeError
+
+    events = EventManager(FakeApp())  # pass an dummy object as an app
+    events.connect('builder-inited', raise_error, priority=500)
+
+    # all errors are converted to ExtensionError
+    with pytest.raises(ExtensionError):
+        events.emit('builder-inited')
+
+    # Allow RuntimeError (pass-through)
+    with pytest.raises(RuntimeError):
+        events.emit('builder-inited', allowed_exceptions=(RuntimeError,))
+
+
+def test_event_pdb():
+    def raise_error(app):
+        raise RuntimeError
+
+    events = EventManager(FakeApp(pdb=True))  # pass an dummy object as an app
+    events.connect('builder-inited', raise_error, priority=500)
+
+    # errors aren't converted
+    with pytest.raises(RuntimeError):
+        events.emit('builder-inited')
+
+    # Allow RuntimeError (pass-through)
+    with pytest.raises(RuntimeError):
+        events.emit('builder-inited', allowed_exceptions=(RuntimeError,))