feat(random): multi-theme groundwork, locked reroll export parity, duplicate export fix, expanded diagnostics and test coverage

code/tests/test_random_reroll_diagnostics_parity.py

@@ -0,0 +1,25 @@
+from __future__ import annotations
+import importlib
+import os
+from starlette.testclient import TestClient
+
+
+def _client(monkeypatch):
+    monkeypatch.setenv('RANDOM_MODES', '1')
+    monkeypatch.setenv('CSV_FILES_DIR', os.path.join('csv_files', 'testdata'))
+    app_module = importlib.import_module('code.web.app')
+    return TestClient(app_module.app)
+
+
+def test_reroll_diagnostics_match_full_build(monkeypatch):
+    client = _client(monkeypatch)
+    base = client.post('/api/random_full_build', json={'seed': 321})
+    assert base.status_code == 200
+    seed = base.json()['seed']
+    reroll = client.post('/api/random_reroll', json={'seed': seed})
+    assert reroll.status_code == 200
+    d_base = base.json().get('diagnostics') or {}
+    d_reroll = reroll.json().get('diagnostics') or {}
+    # Allow reroll to omit elapsed_ms difference but keys should at least cover attempts/timeouts flags
+    for k in ['attempts', 'timeout_hit', 'retries_exhausted']:
+        assert k in d_base and k in d_reroll