Merge branch 'dev' into store-yaml-firmware

tests/unit_tests/components/test_esp_stacktrace.py

@@ -45,6 +45,36 @@ def test_process_stacktrace_esp8266_backtrace(
     assert state is False
 
 
+def test_process_stacktrace_esp8266_crash_handler(
+    setup_core: Path, mock_esp8266_decode_pc: Mock
+) -> None:
+    """Test process_stacktrace handles ESP8266 crash handler backtrace lines."""
+    from esphome.components.esp8266 import process_stacktrace
+
+    config = {"name": "test"}
+
+    # Simulate crash handler log lines as they appear from the API/serial
+    line_pc = "[E][esp8266:191]:   PC: 0x40220060"
+    state = process_stacktrace(config, line_pc, False)
+    mock_esp8266_decode_pc.assert_called_once_with(config, "40220060")
+    assert state is False
+
+    mock_esp8266_decode_pc.reset_mock()
+
+    # Near-null data address (wild pointer) is not a code address, must be ignored
+    line_excvaddr = "[E][esp8266:193]:   EXCVADDR: 0x0000008A"
+    state = process_stacktrace(config, line_excvaddr, False)
+    mock_esp8266_decode_pc.assert_not_called()
+    assert state is False
+
+    mock_esp8266_decode_pc.reset_mock()
+
+    line_bt0 = "[E][esp8266:196]:   BT0: 0x40212345"
+    state = process_stacktrace(config, line_bt0, False)
+    mock_esp8266_decode_pc.assert_called_once_with(config, "40212345")
+    assert state is False
+
+
 def test_process_stacktrace_esp32_backtrace(
     setup_core: Path, mock_esp32_decode_pc: Mock
 ) -> None:

tests/unit_tests/components/test_time.py

@@ -1,6 +1,8 @@
 """Tests for time component cron expression parsing."""
 
 import errno
+import subprocess
+import sys
 from unittest.mock import MagicMock, patch
 
 import pytest
@@ -143,3 +145,43 @@ def test_validate_tz_accepts_posix_string_when_read_bytes_raises_einval() -> Non
         _mock_resources_with_error(OSError(errno.EINVAL, "Invalid argument")),
     ):
         assert validate_tz("<+08>-8") == "<+08>-8"
+
+
+def _modules_after(code: str) -> set[str]:
+    """Run code in a fresh interpreter and return the imported module names.
+
+    A subprocess is required because the test process itself has already
+    imported aioesphomeapi via other tests, so sys.modules here is useless.
+    """
+    result = subprocess.run(
+        [sys.executable, "-c", f"import sys\n{code}\nprint('\\n'.join(sys.modules))"],
+        capture_output=True,
+        text=True,
+        check=True,
+    )
+    return set(result.stdout.split())
+
+
+def test_importing_time_does_not_import_aioesphomeapi() -> None:
+    """Importing the time component must not drag in aioesphomeapi.
+
+    aioesphomeapi is a heavy import (it builds a large number of dataclasses at
+    import time). The time component is auto-loaded by many components, so
+    importing it for its schema during config validation must not pay that
+    cost. The import is deferred to the functions that actually need it.
+    """
+    modules = _modules_after("import esphome.components.time")
+    assert "aioesphomeapi" not in modules
+
+
+def test_validate_tz_imports_aioesphomeapi_lazily() -> None:
+    """Validating a non-empty timezone is what triggers the lazy import.
+
+    Documents the boundary: the cost is only paid when a timezone is actually
+    validated, not merely by loading the component.
+    """
+    modules = _modules_after(
+        "from esphome.components.time import validate_tz\n"
+        "validate_tz('EST5EDT,M3.2.0,M11.1.0')"
+    )
+    assert "aioesphomeapi" in modules