ntoskrnl/tests: Add test for getting SPDRP_BASE_CONTAINERID from PnP driver.

dlls/ntoskrnl.exe/tests/driver_pnp.c

@@ -228,7 +228,10 @@ static NTSTATUS query_id(struct device *device, IRP *irp, BUS_QUERY_ID_TYPE type
         }
 
         case BusQueryContainerID:
-            return STATUS_NOT_SUPPORTED;
+            if (!(id = ExAllocatePool(PagedPool, 39 * sizeof(WCHAR))))
+                return STATUS_NO_MEMORY;
+            wcscpy(id, L"{12345678-1234-1234-1234-123456789123}");
+            break;
 
         default:
             ok(0, "Unexpected ID query type %#x.\n", type);

dlls/ntoskrnl.exe/tests/ntoskrnl.c

@@ -1462,6 +1462,7 @@ static void test_pnp_devices(void)
     static const char expect_compat_id[] = "winetest_compat\0winetest_compat_1\0";
 
     char buffer[200];
+    WCHAR buffer_w[200];
     SP_DEVICE_INTERFACE_DETAIL_DATA_A *iface_detail = (void *)buffer;
     SP_DEVICE_INTERFACE_DATA iface = {sizeof(iface)};
     SP_DEVINFO_DATA device = {sizeof(device)};
@@ -1646,6 +1647,11 @@ static void test_pnp_devices(void)
     ok(size == sizeof(expect_hardware_id), "got size %lu\n", size);
     ok(!memcmp(buffer, expect_hardware_id, size), "got hardware IDs %s\n", debugstr_an(buffer, size));
 
+    /* Using the WCHAR variant because Windows returns a WCHAR for this property even when using SetupDiGetDeviceRegistryPropertyA */
+    ret = SetupDiGetDeviceRegistryPropertyW(set, &device, SPDRP_BASE_CONTAINERID,
+            &type, (BYTE *)buffer_w, sizeof(buffer_w), &size);
+    todo_wine ok(ret, "got error %#lx\n", GetLastError());
+
     ret = SetupDiGetDeviceRegistryPropertyA(set, &device, SPDRP_COMPATIBLEIDS,
             &type, (BYTE *)buffer, sizeof(buffer), &size);
     ok(ret, "got error %#lx\n", GetLastError());