[Router] Add composable scoring and eligibility policies (#37731)

Co-authored-by: inkcherry <mingzhi.liu@amd.com>

test/registered/unit/tools/test_cuda_ci_install_dependency.py

@@ -0,0 +1,46 @@
+import importlib.util
+import re
+import unittest
+from pathlib import Path
+
+REPO_ROOT = Path(__file__).resolve().parents[4]
+CI_REGISTER_PATH = REPO_ROOT / "python" / "sglang" / "test" / "ci" / "ci_register.py"
+INSTALL_SCRIPT = REPO_ROOT / "scripts" / "ci" / "cuda" / "ci_install_dependency.sh"
+
+
+def _load_module(name, path):
+    spec = importlib.util.spec_from_file_location(name, path)
+    module = importlib.util.module_from_spec(spec)
+    spec.loader.exec_module(module)
+    return module
+
+
+register_cpu_ci = _load_module("ci_register", CI_REGISTER_PATH).register_cpu_ci
+register_cpu_ci(est_time=0, suite="base-a-test-cpu")
+
+
+class TestCudaCiInstallDependencyTorchCache(unittest.TestCase):
+    def test_rebuilds_torch_extensions_before_editable_install(self):
+        script = INSTALL_SCRIPT.read_text()
+
+        self.assertRegex(
+            script,
+            re.compile(
+                r"setup_cargo_cache\s*\n"
+                r"\s*invalidate_torch_rust_cache\s*\n"
+                r"\s*install_sglang"
+            ),
+        )
+        self.assertIn('"${SGLANG_BUILD_RUST_EXTS:-}" = "none"', script)
+        self.assertRegex(
+            script,
+            re.compile(
+                r"cargo clean --release --manifest-path "
+                r"\"\$\{REPO_ROOT\}/rust/sglang-radix-tree/Cargo\.toml\"\s*\\\n"
+                r"\s*-p torch-sys -p sglang-radix-tree"
+            ),
+        )
+
+
+if __name__ == "__main__":
+    unittest.main()