From 7dbec6abf7fea65e411c19dbf683f939e6b7a435 Mon Sep 17 00:00:00 2001
From: "J. Nick Koston" <nick@home-assistant.io>
Date: Fri, 16 Oct 2026 15:51:05 -1000
Subject: [PATCH] [ld6002b] Check each area_config setting on its own for
 duplicates, and test the check

---
 esphome/components/ld6002b/__init__.py        | 26 +++++---
 .../ld6002b/test_final_validate.py            | 61 ++++++++++++++++++-
 2 files changed, 79 insertions(+), 8 deletions(-)

diff --git a/esphome/components/ld6002b/__init__.py b/esphome/components/ld6002b/__init__.py
index 9663f3802a7..860f146bfa4 100644
--- a/esphome/components/ld6002b/__init__.py
+++ b/esphome/components/ld6002b/__init__.py
@@ -6,7 +6,7 @@ from esphome.const import CONF_ID, CONF_PLATFORM, CONF_WAKEUP_PIN
 import esphome.final_validate as fv
 from esphome.types import ConfigType
 
-from .const import CONF_AUTO_WAKE, CONF_LD6002B_ID, CONF_WAKEUP_PULSE
+from .const import CONF_AREA_CONFIG, CONF_AUTO_WAKE, CONF_LD6002B_ID, CONF_WAKEUP_PULSE
 
 CODEOWNERS = ["@hepter"]
 DEPENDENCIES = ["uart"]
@@ -84,11 +84,23 @@ def validate_unique_settings(domain: str, config: ConfigType) -> None:
         for entry in fv.full_config.get().get(domain, [])
         if entry.get(CONF_PLATFORM) == DOMAIN and entry.get(CONF_LD6002B_ID) == hub_id
     ]
-    for key in config:
+    for key, value in config.items():
         if key in (CONF_PLATFORM, CONF_LD6002B_ID):
             continue
-        if sum(key in entry for entry in entries) > 1:
-            raise cv.Invalid(
-                f"{key} is already set for this ld6002b in another {domain} block",
-                path=[key],
-            )
+        # area_config groups six settings, so each one is checked on its own
+        for path in (
+            [[key, sub] for sub in value] if key == CONF_AREA_CONFIG else [[key]]
+        ):
+            if sum(_has_path(entry, path) for entry in entries) > 1:
+                raise cv.Invalid(
+                    f"{'.'.join(path)} is already set for this ld6002b in another {domain} block",
+                    path=path,
+                )
+
+
+def _has_path(entry: ConfigType, path: list[str]) -> bool:
+    for key in path:
+        if key not in entry:
+            return False
+        entry = entry[key]
+    return True
diff --git a/tests/component_tests/ld6002b/test_final_validate.py b/tests/component_tests/ld6002b/test_final_validate.py
index 0bb091533b4..5a666c7f186 100644
--- a/tests/component_tests/ld6002b/test_final_validate.py
+++ b/tests/component_tests/ld6002b/test_final_validate.py
@@ -9,11 +9,17 @@ from __future__ import annotations
 
 import pytest
 
+from esphome.components.ld6002b import validate_unique_settings
 from esphome.components.ld6002b.button import (
     CONFIG_SCHEMA as BUTTON_CONFIG_SCHEMA,
     FINAL_VALIDATE_SCHEMA as BUTTON_FINAL_VALIDATE_SCHEMA,
 )
-from esphome.components.ld6002b.const import CONF_AREA_CONFIG, CONF_Z_MIN
+from esphome.components.ld6002b.const import (
+    CONF_AREA_CONFIG,
+    CONF_HOLD_DELAY,
+    CONF_Z_MAX,
+    CONF_Z_MIN,
+)
 from esphome.components.ld6002b.number import (
     CONFIG_SCHEMA as NUMBER_CONFIG_SCHEMA,
     FINAL_VALIDATE_SCHEMA as NUMBER_FINAL_VALIDATE_SCHEMA,
@@ -40,6 +46,7 @@ def _full_config(
     *,
     selects: list[ConfigType] | None = None,
     buttons: list[ConfigType] | None = None,
+    numbers: list[ConfigType] | None = None,
 ) -> Config:
     """A full config carrying one ld6002b hub, as the ID pass leaves it.
 
@@ -57,6 +64,8 @@ def _full_config(
         full["select"] = selects
     if buttons is not None:
         full[CONF_BUTTON] = buttons
+    if numbers is not None:
+        full["number"] = numbers
     return full
 
 
@@ -214,3 +223,53 @@ def test_area_config_without_select_is_rejected(
         ),
     ):
         _validated_numbers(_area_numbers())
+
+
+def _number_block(**settings: ConfigType) -> ConfigType:
+    """A number platform block on the shared hub, as final validation sees it."""
+    return {
+        "platform": "ld6002b",
+        "ld6002b_id": ID(HUB_ID, is_declaration=False, type="ld6002b"),
+        **settings,
+    }
+
+
+@pytest.mark.parametrize(
+    ("first", "second", "error"),
+    [
+        (
+            {CONF_HOLD_DELAY: {"name": "A"}},
+            {CONF_HOLD_DELAY: {"name": "B"}},
+            r"^hold_delay is already set .* @ data\['hold_delay'\]$",
+        ),
+        (
+            {CONF_AREA_CONFIG: {CONF_Z_MIN: {"name": "A"}}},
+            {CONF_AREA_CONFIG: {CONF_Z_MIN: {"name": "B"}}},
+            r"^area_config\.z_min is already set .* @ data\['area_config'\]\['z_min'\]$",
+        ),
+        (
+            {CONF_AREA_CONFIG: {CONF_Z_MIN: {"name": "A"}}},
+            {CONF_AREA_CONFIG: {CONF_Z_MAX: {"name": "B"}}},
+            None,
+        ),
+        ({CONF_HOLD_DELAY: {"name": "A"}}, {CONF_Z_MIN: {"name": "B"}}, None),
+    ],
+)
+def test_setting_in_two_blocks_of_one_hub(
+    set_core_config: SetCoreConfigCallable,
+    first: ConfigType,
+    second: ConfigType,
+    error: str | None,
+) -> None:
+    """Each setting maps to one entity pointer, so two blocks cannot share one."""
+    blocks = [_number_block(**first), _number_block(**second)]
+    set_core_config(
+        PlatformFramework.ESP32_IDF,
+        full_config=_full_config(_hub(wakeup_pin=False), numbers=blocks),
+    )
+
+    if error is None:
+        validate_unique_settings("number", blocks[1])
+        return
+    with pytest.raises(cv.Invalid, match=error):
+        validate_unique_settings("number", blocks[1])