[esp32_ble_server] Fix duplicate Device Information Service with string UUIDs (#16784)

tests/component_tests/esp32_ble_server/test_esp32_ble_server.py

@@ -0,0 +1,47 @@
+"""Tests for esp32_ble_server configuration helpers."""
+
+import pytest
+
+from esphome.components.esp32_ble_server import (
+    CCCD_DESCRIPTOR_UUID,
+    CUD_DESCRIPTOR_UUID,
+    DEVICE_INFORMATION_SERVICE_UUID,
+    uuid_is,
+)
+
+
+@pytest.mark.parametrize(
+    "uuid",
+    [
+        DEVICE_INFORMATION_SERVICE_UUID,  # int form (cv.hex_uint32_t)
+        "180A",  # 16 bit short form (bt_uuid)
+        "180a",  # lowercase is normalized by bt_uuid but guard anyway
+        "0000180A",  # 32 bit form
+        "0000180A-0000-1000-8000-00805F9B34FB",  # full 128 bit form
+    ],
+)
+def test_uuid_is_matches_all_representations(uuid) -> None:
+    """All representations of the same 16 bit UUID must compare equal."""
+    assert uuid_is(uuid, DEVICE_INFORMATION_SERVICE_UUID)
+
+
+@pytest.mark.parametrize(
+    "uuid",
+    [
+        0x1818,  # Cycling Power Service (different int)
+        "1818",  # different 16 bit short form
+        "0000180B",  # adjacent UUID
+        "0000180A-0000-1000-8000-00805F9B34FC",  # wrong base UUID suffix
+    ],
+)
+def test_uuid_is_rejects_other_uuids(uuid) -> None:
+    """A different UUID must not be mistaken for the device information service."""
+    assert not uuid_is(uuid, DEVICE_INFORMATION_SERVICE_UUID)
+
+
+@pytest.mark.parametrize("uuid16", [CUD_DESCRIPTOR_UUID, CCCD_DESCRIPTOR_UUID])
+def test_uuid_is_matches_descriptor_short_strings(uuid16) -> None:
+    """Reserved descriptor UUIDs match whether given as int or short string."""
+    assert uuid_is(uuid16, uuid16)
+    assert uuid_is(f"{uuid16:04X}", uuid16)
+    assert uuid_is(f"{uuid16:08X}", uuid16)