dinput8/tests: Add window name and window class name test.

dlls/dinput8/tests/device.c

@@ -628,7 +628,20 @@ static void test_mouse_keyboard(void)
     ok(raw_devices_count == 0, "Unexpected raw devices registered: %d\n", raw_devices_count);
 
     if (raw_devices[0].hwndTarget != NULL)
+    {
+        WCHAR di_hwnd_class[] = {'D','I','E','m','W','i','n',0};
+        WCHAR str[16];
+        int i;
+
         di_hwnd = raw_devices[0].hwndTarget;
+        i = GetClassNameW(di_hwnd, str, ARRAY_SIZE(str));
+        ok(i == lstrlenW(di_hwnd_class), "GetClassName returned incorrect length\n");
+        ok(!lstrcmpW(di_hwnd_class, str), "GetClassName returned incorrect name for this window's class\n");
+
+        i = GetWindowTextW(di_hwnd, str, ARRAY_SIZE(str));
+        ok(i == lstrlenW(di_hwnd_class), "GetClassName returned incorrect length\n");
+        ok(!lstrcmpW(di_hwnd_class, str), "GetClassName returned incorrect name for this window's class\n");
+    }
 
     hr = IDirectInputDevice8_Acquire(di_mouse);
     ok(SUCCEEDED(hr), "IDirectInputDevice8_Acquire failed: %08x\n", hr);