fix(lab): avoid runtime typing on Python 3.9

tests/test_lab_v1_component_adapter_image_installer.py

@@ -41,7 +41,7 @@ def test_component_image_installer_binds_bases_and_adapter_sources() -> None:
     for digest in (
         "58df7489c3f2276f9591d500a012dee03e23d35543ce3c390b4c001e6bf90794",
         "591cb382c099eeb05e7ec16e2371e0b2da54d2bb5c49ec0f4ac88dbf72b0f0cd",
-        "91c1878a58acf3ac35ce894f4de9b63cba3b7f29a65548e28df176063a2953c9",
+        "b7dcb3532a65ddc2d6988391056dd2f58f5f631a4db978ebfb5e170bde9c3916",
         "b48ef255403abcfd177a6550688410a52b0fbd29d2a54c8417cb5a0daa330ad5",
         "a398a43fe4069bf1b1fc2ec61b44df53dad6072cccb6d10a2627e76a96a94056",
     ):

tests/test_observatory_portable_lab_v1_component_adapters.py

@@ -1,5 +1,6 @@
 from __future__ import annotations
 
+import ast
 import hashlib
 import json
 import shutil
@@ -35,6 +36,20 @@ def test_component_entrypoints_keep_the_legacy_python39_syntax_floor() -> None:
     for path in paths:
         source = path.read_text(encoding="utf-8")
         assert "\ntype " not in source
+        module = ast.parse(source, filename=str(path), feature_version=(3, 9))
+        for statement in module.body:
+            if isinstance(statement, ast.Assign):
+                assert not any(
+                    isinstance(node, ast.BinOp) and isinstance(node.op, ast.BitOr)
+                    for node in ast.walk(statement.value)
+                ), f"runtime-evaluated PEP 604 alias in {path.name}"
+        for call in (node for node in ast.walk(module) if isinstance(node, ast.Call)):
+            if isinstance(call.func, ast.Name) and call.func.id == "cast":
+                assert call.args
+                assert not any(
+                    isinstance(node, ast.BinOp) and isinstance(node.op, ast.BitOr)
+                    for node in ast.walk(call.args[0])
+                ), f"runtime-evaluated PEP 604 cast in {path.name}"
     assert "slots=True" not in paths[0].read_text(encoding="utf-8")
     assert "slots=True" not in paths[2].read_text(encoding="utf-8")