Gate controller pairing behind BOOTSEL

tests/test_bootsel_pairing_button_native.py

@@ -0,0 +1,34 @@
+from __future__ import annotations
+
+import shutil
+import subprocess
+from pathlib import Path
+
+
+def test_bootsel_pairing_button_native(tmp_path: Path) -> None:
+    root = Path(__file__).resolve().parents[1]
+    compiler = shutil.which("c++") or shutil.which("g++")
+    assert compiler is not None, "a host C++ compiler is required"
+
+    for platform, rp2350 in (("rp2350", 1), ("rp2040", 0)):
+        executable = tmp_path / f"bootsel_pairing_button_test_{platform}"
+        subprocess.run(
+            [
+                compiler,
+                "-std=c++17",
+                "-Wall",
+                "-Wextra",
+                "-Werror",
+                "-pedantic",
+                f"-DPICO_RP2350={rp2350}",
+                f"-I{root / 'tests' / 'bootsel_native_stubs'}",
+                f"-I{root}",
+                str(root / "bootsel_pairing_button.cpp"),
+                str(root / "tests" / "bootsel_pairing_button_test.cpp"),
+                "-o",
+                str(executable),
+            ],
+            check=True,
+            cwd=root,
+        )
+        subprocess.run([str(executable)], check=True, cwd=root)