Initial open-source release

Claude-Session: https://claude.ai/code/session_01B65qLEKnkeYTGdbwhLpjCu

fixtures/python-app/tests/test_models.py

@@ -0,0 +1,39 @@
+import os
+from datetime import date
+
+import pytest
+
+from tasks import Priority, TaskList
+
+
+def test_pending_is_sorted_by_priority():
+    tasks = TaskList()
+    tasks.add("low", Priority.LOW)
+    tasks.add("high", Priority.HIGH)
+    assert [t.title for t in tasks.pending()] == ["high", "low"]
+
+
+def test_complete_and_overdue():
+    tasks = TaskList()
+    tasks.add("late", Priority.NORMAL, date(2020, 1, 1))
+    assert [t.title for t in tasks.overdue(date(2024, 1, 1))] == ["late"]
+    tasks.complete("late")
+    assert tasks.overdue(date(2024, 1, 1)) == []
+
+
+def test_rejects_empty_titles():
+    with pytest.raises(ValueError):
+        TaskList().add("   ")
+
+
+def test_tags():
+    tasks = TaskList()
+    tasks.add("a", Priority.LOW, None, "x", "y")
+    tasks.add("b", Priority.LOW, None, "y")
+    assert len(tasks.by_tag("y")) == 2
+
+
+@pytest.mark.skipif(not os.environ.get("OPENIDEA_FAIL"), reason="set OPENIDEA_FAIL=1 to run")
+def test_intentionally_failing():
+    # FIXME: wrong on purpose (QA: failing test in the test tree)
+    assert len(TaskList()) == 1