[libretiny] Reboot and report the previous boot's crash on BK7238 and BK7231N (#21012)

tests/component_tests/libretiny/config/bk7231t.yaml

@@ -0,0 +1,5 @@
+esphome:
+  name: test
+
+bk72xx:
+  board: generic-bk7231t-qfn32-tuya

tests/component_tests/libretiny/config/bk7238.yaml

@@ -0,0 +1,5 @@
+esphome:
+  name: test
+
+bk72xx:
+  board: generic-bk7238

tests/component_tests/libretiny/test_crash_handler.py

@@ -0,0 +1,37 @@
+"""Only BK7238 and BK7231N, the BK chips with an ITCM linker region, get the crash handler."""
+
+from __future__ import annotations
+
+from collections.abc import Callable
+from pathlib import Path
+
+import pytest
+
+from esphome.components.libretiny import BK_TRAP_HANDLERS
+from esphome.core import CORE
+
+
+@pytest.mark.parametrize(
+    ("config", "enabled"),
+    [
+        ("bk7238.yaml", True),
+        ("bk72xx.yaml", True),  # BK7231N
+        ("bk7231t.yaml", False),
+        ("ln882x.yaml", False),
+    ],
+)
+def test_crash_handler_family_gate(
+    generate_main: Callable[[str | Path], str],
+    component_config_path: Callable[[str], Path],
+    config: str,
+    enabled: bool,
+) -> None:
+    generate_main(component_config_path(config))
+    defines = {define.name for define in CORE.defines}
+    assert ("USE_LIBRETINY_CRASH_HANDLER" in defines) is enabled
+    assert ("USE_CRASH_HANDLER" in defines) is enabled
+    for trap in BK_TRAP_HANDLERS:
+        assert (f"-Wl,--wrap={trap}" in CORE.build_flags) is enabled
+    assert (
+        "pre:patch_noinit.py" in CORE.platformio_options["extra_scripts"]
+    ) is enabled