No update available if update cannot be installed on system

supervisor/addons/addon.py

@@ -285,9 +285,13 @@ def version(self) -> str | None:
     @property
     def need_update(self) -> bool:
         """Return True if an update is available."""
-        if self.is_detached:
+        if self.is_detached or self.version == self.latest_version:
             return False
-        return self.version != self.latest_version
+
+        with suppress(AddonsNotSupportedError):
+            self._validate_availability(self.data_store)
+            return True
+        return False
 
     @property
     def dns(self) -> list[str]:

tests/api/test_addons.py

@@ -4,6 +4,8 @@
 from unittest.mock import MagicMock, PropertyMock, patch
 
 from aiohttp.test_utils import TestClient
+from awesomeversion import AwesomeVersion
+import pytest
 
 from supervisor.addons.addon import Addon
 from supervisor.addons.build import AddonBuild
@@ -285,3 +287,37 @@ async def test_api_addon_uninstall_remove_config(
     assert resp.status == 200
     assert not coresys.addons.get("local_example", local_only=True)
     assert not test_folder.exists()
+
+
+async def test_api_update_available_validates_version(
+    api_client: TestClient,
+    coresys: CoreSys,
+    install_addon_example: Addon,
+    caplog: pytest.LogCaptureFixture,
+    tmp_supervisor_data,
+    path_extern,
+):
+    """Test update available field is only true if user can update to latest version."""
+    install_addon_example.data["ingress"] = False
+    install_addon_example.data_store["version"] = "1.3.0"
+    caplog.clear()
+
+    resp = await api_client.get("/addons/local_example/info")
+    assert resp.status == 200
+    result = await resp.json()
+    assert result["data"]["version"] == "1.2.0"
+    assert result["data"]["version_latest"] == "1.3.0"
+    assert result["data"]["update_available"] is True
+
+    # If new version can't be installed due to HA version, then no update is available
+    coresys.homeassistant.version = AwesomeVersion("2024.04.0")
+    install_addon_example.data_store["homeassistant"] = "2024.06.0"
+
+    resp = await api_client.get("/addons/local_example/info")
+    assert resp.status == 200
+    result = await resp.json()
+    assert result["data"]["version"] == "1.2.0"
+    assert result["data"]["version_latest"] == "1.3.0"
+    assert result["data"]["update_available"] is False
+
+    assert "Add-on local_example not supported" not in caplog.text