test: wire pytest test harness with standard hass fixture

pyproject.toml

@@ -9,9 +9,11 @@ dependencies = []
 [dependency-groups]
 dev = [
     "pytest>=8.0.0",
+    "pytest-asyncio>=0.24",
     "voluptuous>=0.14",
 ]
 
 [tool.pytest.ini_options]
 testpaths = ["tests"]
 pythonpath = ["."]
+asyncio_mode = "auto"

tests/conftest.py

@@ -0,0 +1,58 @@
+"""Shared pytest fixtures for the NestQuest test suite.
+
+pytest-homeassistant-custom-component could not be adopted: it pins
+``pytest==9.0.3`` and ``voluptuous==0.13.1``, which conflicts with the dev
+group's ``voluptuous>=0.14`` (used directly by the options flow's schema and
+its tests), and its back-releases raise the floor to Python >=3.12 while this
+project supports >=3.11.  The documented fallback is therefore used:
+``pytest-asyncio`` plus a standard-shaped ``hass`` fixture below.
+
+The tests mock the ``homeassistant`` package via ``sys.modules`` injection;
+this conftest wires the mock modules before any test module import and
+provides the standard ``hass`` fixture shape (``config``, ``config_entries``,
+``data``, ``loop``) that HA's own harness exposes.
+"""
+
+from __future__ import annotations
+
+import asyncio
+import sys
+from types import SimpleNamespace
+from unittest.mock import MagicMock
+
+import pytest
+
+# Mock homeassistant modules if not installed in the environment.  Runs in
+# conftest so it precedes every test module's import of the integration.
+for _mod in (
+    "homeassistant",
+    "homeassistant.core",
+    "homeassistant.config_entries",
+    "homeassistant.data_entry_flow",
+):
+    sys.modules.setdefault(_mod, MagicMock())
+
+# Wire parent package attributes so "from homeassistant import config_entries"
+# resolves to the mocked submodule, mirroring real HA's package layout.
+sys.modules["homeassistant"].config_entries = sys.modules["homeassistant.config_entries"]
+sys.modules["homeassistant"].data_entry_flow = sys.modules["homeassistant.data_entry_flow"]
+
+
+@pytest.fixture
+def hass():
+    """Provide a standard-shaped hass fixture.
+
+    Mirrors the surface of Home Assistant's ``hass`` fixture: a ``config``
+    namespace, a ``config_entries`` manager, a ``data`` dict for integration
+    state, and the running event ``loop``.
+    """
+    hass = SimpleNamespace(
+        data={},
+        config=MagicMock(),
+        config_entries=MagicMock(),
+    )
+    hass.loop = asyncio.new_event_loop()
+    try:
+        yield hass
+    finally:
+        hass.loop.close()

uv.lock

@@ -28,6 +28,7 @@ source = { virtual = "." }
 [package.dev-dependencies]
 dev = [
     { name = "pytest" },
+    { name = "pytest-asyncio" },
     { name = "voluptuous" },
 ]
 
@@ -36,6 +37,7 @@ dev = [
 [package.metadata.requires-dev]
 dev = [
     { name = "pytest", specifier = ">=8.0.0" },
+    { name = "pytest-asyncio", specifier = ">=0.24" },
     { name = "voluptuous", specifier = ">=0.14" },
 ]
 
@@ -82,6 +84,28 @@ wheels = [
     { url = "https://files.pythonhosted.org/packages/24/25/1de2678b631f5a49215c6c96fff41ba892b0a34df68d6d80292b1b48aa7f/pytest-9.1.1-py3-none-any.whl", hash = "sha256:37a86b45efb9a47a61a36449063e8e18d0cab3161329fc099eb21783169c4f0c", size = 386536, upload-time = "2026-06-19T10:58:31.347Z" },
 ]
 
+[[package]]
+name = "pytest-asyncio"
+version = "1.4.0"
+source = { registry = "https://pypi.org/simple" }
+dependencies = [
+    { name = "pytest" },
+    { name = "typing-extensions", marker = "python_full_version < '3.13'" },
+]
+sdist = { url = "https://files.pythonhosted.org/packages/43/7c/d36d04db312ecf4298932ef77e6e4a9e8ad017906e24e34f0b0c361a2473/pytest_asyncio-1.4.0.tar.gz", hash = "sha256:c6c0d2259945122819f171a32ecea2c349ead889ee28176caaf492143424be42", size = 58514, upload-time = "2026-05-26T09:56:04.083Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/03/e2/08a497ef684b88559c9cc5f4ad53a37e7b99e727094a86d6ea32536d5d3c/pytest_asyncio-1.4.0-py3-none-any.whl", hash = "sha256:933ca923a23075a87fb7070c0ec272a6848489824d887c85c812670932835aa1", size = 16930, upload-time = "2026-05-26T09:56:02.576Z" },
+]
+
+[[package]]
+name = "typing-extensions"
+version = "4.16.0"
+source = { registry = "https://pypi.org/simple" }
+sdist = { url = "https://files.pythonhosted.org/packages/f6/cc/6253133b5bb138fc3306cebfbda2c520f545d36b5be2c7255cc528bb45d6/typing_extensions-4.16.0.tar.gz", hash = "sha256:dc983d19a509c94dba722ee6abd33940f7c05a89e243c47e907eb4db6f1a43e5", size = 113555, upload-time = "2026-07-02T08:40:05.92Z" }
+wheels = [
+    { url = "https://files.pythonhosted.org/packages/49/d3/b8441a820a491ddfc024b0b0cf0393375b75ea13866d9c66727e54c2fc80/typing_extensions-4.16.0-py3-none-any.whl", hash = "sha256:481caa481374e813c1b176ada14e97f1f67a4539ce9cfeb3f350d78d6370c2e8", size = 45571, upload-time = "2026-07-02T08:40:04.659Z" },
+]
+
 [[package]]
 name = "voluptuous"
 version = "0.16.0"