Support share mounts (#4318)

tests/backups/test_manager.py

@@ -427,6 +427,67 @@ async def test_backup_media_with_mounts(
     assert not mount_dir.exists()
 
 
+async def test_backup_share_with_mounts(
+    coresys: CoreSys,
+    all_dbus_services: dict[str, DBusServiceMock],
+    tmp_supervisor_data,
+    path_extern,
+):
+    """Test backing up share folder with mounts."""
+    systemd_service: SystemdService = all_dbus_services["systemd"]
+    systemd_service.response_get_unit = [
+        DBusError("org.freedesktop.systemd1.NoSuchUnit", "error"),
+        "/org/freedesktop/systemd1/unit/tmp_2dyellow_2emount",
+        DBusError("org.freedesktop.systemd1.NoSuchUnit", "error"),
+        "/org/freedesktop/systemd1/unit/tmp_2dyellow_2emount",
+        "/org/freedesktop/systemd1/unit/tmp_2dyellow_2emount",
+        "/org/freedesktop/systemd1/unit/tmp_2dyellow_2emount",
+    ]
+
+    # Make some normal test files
+    (test_file_1 := coresys.config.path_share / "test.txt").touch()
+    (test_dir := coresys.config.path_share / "test").mkdir()
+    (test_file_2 := coresys.config.path_share / "test" / "inner.txt").touch()
+
+    # Add a media mount
+    await coresys.mounts.load()
+    await coresys.mounts.create_mount(
+        Mount.from_dict(
+            coresys,
+            {
+                "name": "share_test",
+                "usage": "share",
+                "type": "cifs",
+                "server": "test.local",
+                "share": "test",
+            },
+        )
+    )
+    assert (mount_dir := coresys.config.path_share / "share_test").is_dir()
+
+    # Make a partial backup
+    coresys.core.state = CoreState.RUNNING
+    coresys.hardware.disk.get_disk_free_space = lambda x: 5000
+    backup: Backup = await coresys.backups.do_backup_partial("test", folders=["share"])
+
+    # Remove the mount and wipe the media folder
+    await coresys.mounts.remove_mount("share_test")
+    rmtree(coresys.config.path_share)
+    coresys.config.path_share.mkdir()
+
+    # Restore the backup and check that only the test files we made returned
+    async def mock_async_true(*args, **kwargs):
+        return True
+
+    with patch.object(HomeAssistantCore, "is_running", new=mock_async_true):
+        await coresys.backups.do_restore_partial(backup, folders=["share"])
+
+    assert test_file_1.exists()
+    assert test_dir.is_dir()
+    assert test_file_2.exists()
+    assert not mount_dir.exists()
+
+
 async def test_full_backup_to_mount(coresys: CoreSys, tmp_supervisor_data, path_extern):
     """Test full backup to and restoring from a mount."""
     (marker := coresys.config.path_homeassistant / "test.txt").touch()