Build the shared rp2350 target on rpipico2w and test the slot accounting

tests/component_tests/rp2040_ble/test_connection_slots.py

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+"""Connection-slot accounting: consumers claim against MAX_CONNECTIONS and
+final validation rejects over-subscription with the consumer list."""
+
+from __future__ import annotations
+
+from collections.abc import Callable
+from pathlib import Path
+
+import pytest
+
+from esphome import config_validation as cv
+from esphome.components import rp2040_ble
+from esphome.core import CORE
+
+
+def test_proxy_claims_its_slots_through_the_shared_accounting(
+    generate_main: Callable[[str | Path], str],
+    component_config_path: Callable[[str], Path],
+) -> None:
+    # A default (3-slot) proxy build records one claim per slot, attributed
+    # to the consumer, and passes final validation.
+    generate_main(component_config_path("rp2_proxy_default.yaml"))
+    used = CORE.data[rp2040_ble.KEY_RP2040_BLE][rp2040_ble.KEY_USED_CONNECTION_SLOTS]
+    assert used == ["bluetooth_proxy"] * 3
+
+
+def test_oversubscription_is_rejected_with_the_consumer_list() -> None:
+    # No YAML shape reaches this today (the proxy schema caps at the same
+    # limit); the guard exists for a second consumer such as ble_client.
+    rp2040_ble.consume_connection_slots(3, "bluetooth_proxy")({})
+    rp2040_ble.consume_connection_slots(1, "ble_client")({})
+    with pytest.raises(
+        cv.Invalid,
+        match=r"4 connection slots.*maximum is 3.*bluetooth_proxy.*ble_client",
+    ):
+        rp2040_ble.validate_connection_slots()
+
+
+def test_at_cap_passes() -> None:
+    rp2040_ble.consume_connection_slots(3, "bluetooth_proxy")({})
+    rp2040_ble.validate_connection_slots()