feat(detection-core): JS handler extraction for bind(this)/arrow/class-method routes (8.2 part 3); fold in load_pack_file repairing 51971cd import

tests/test_js_handler_extraction.py

@@ -0,0 +1,53 @@
+"""Handler-extraction tests for detection-core 8.2 part 3 (Req 3: recognition coverage)."""
+
+import sys
+import tempfile
+from pathlib import Path
+
+sys.path.insert(0, str(Path(__file__).resolve().parents[1]))
+
+from openultrasast.mapping.legacy import _js_entry_points  # noqa: E402
+from openultrasast.preprocess import FileTarget, detect_language  # noqa: E402
+
+SOURCE = """import express from "express";
+const app = express();
+class Api {
+  getHealth(req, res) { res.send("ok"); }
+  submit(req, res) { res.send("done"); }
+}
+const api = new Api();
+app.get("/health", api.getHealth.bind(api));
+app.post("/submit", (req, res) => { res.send("done"); });
+app.delete("/old", api.submit);
+"""
+
+
+def _target(root: Path) -> FileTarget:
+    path = root / "src/routes.ts"
+    path.parent.mkdir(parents=True, exist_ok=True)
+    path.write_text(SOURCE, encoding="utf-8")
+    return FileTarget("src/routes.ts", str(path), detect_language(path), 9, [], False, [], [])
+
+
+def test_bind_this_handler_resolves_with_defines_handler() -> None:
+    with tempfile.TemporaryDirectory() as tmp:
+        target = _target(Path(tmp))
+        routes = [e for e in _js_entry_points(target, SOURCE, []) if e.kind == "route"]
+        health = next(e for e in routes if e.function_name == "getHealth")
+        assert health.defines_handler is True
+
+
+def test_arrow_inline_handler_counts_as_defined() -> None:
+    with tempfile.TemporaryDirectory() as tmp:
+        target = _target(Path(tmp))
+        routes = [e for e in _js_entry_points(target, SOURCE, []) if e.kind == "route"]
+        submit = next(e for e in routes if e.function_name == "arrow_handler")
+        assert submit.defines_handler is True
+
+
+def test_plain_identifier_handler_still_works() -> None:
+    with tempfile.TemporaryDirectory() as tmp:
+        target = _target(Path(tmp))
+        routes = [e for e in _js_entry_points(target, SOURCE, []) if e.kind == "route"]
+        delete = next(e for e in routes if e.function_name == "submit")
+        assert delete.defines_handler is True