feat: chargements de pages best-effort au boot (tableau, sources) (#78)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

tests/test_page_loads.py

@@ -0,0 +1,61 @@
+import os
+
+
+def test_update_timestamp_falls_back_to_db_mtime(tmp_path, monkeypatch):
+    import src.utils as u
+    from src.utils import get_data_update_timestamp
+
+    def boom(*a, **k):
+        raise RuntimeError("net down")
+
+    monkeypatch.setattr(u, "get_last_modified", boom)
+    fb = tmp_path / "decp.duckdb"
+    fb.write_bytes(b"x")
+    assert get_data_update_timestamp("http://x", str(fb)) == os.path.getmtime(str(fb))
+
+
+def test_update_timestamp_none_when_all_fail(monkeypatch):
+    import src.utils as u
+    from src.utils import get_data_update_timestamp
+
+    def boom(*a, **k):
+        raise RuntimeError("net down")
+
+    monkeypatch.setattr(u, "get_last_modified", boom)
+    assert get_data_update_timestamp("http://x", None) is None
+
+
+def test_update_timestamp_nominal(monkeypatch):
+    import src.utils as u
+    from src.utils import get_data_update_timestamp
+
+    monkeypatch.setattr(u, "get_last_modified", lambda p: 123.0)
+    assert get_data_update_timestamp("http://x", None) == 123.0
+
+
+def test_sources_tables_none_path():
+    from src.figures import get_sources_tables
+
+    div = get_sources_tables(None)
+    assert "indisponible" in str(div.children).lower()
+
+
+def test_sources_tables_missing_file():
+    from src.figures import get_sources_tables
+
+    div = get_sources_tables("/does/not/exist.csv")
+    assert "indisponible" in str(div.children).lower()
+
+
+def test_sources_tables_valid_csv(tmp_path):
+    from dash import dash_table
+
+    from src.figures import get_sources_tables
+
+    csv = tmp_path / "s.csv"
+    csv.write_text(
+        "nom,organisation,nb_marchés,nb_acheteurs,code,url,unique\n"
+        "Source A,Org A,5,2,XA,http://a,1\n"
+    )
+    div = get_sources_tables(str(csv))
+    assert isinstance(div.children, dash_table.DataTable)