[PATCH] comctl32/tests: Fix propsheet template buffer size test on RTL locales

[Nikolay Sivov]

On 13.11.2017 8:13, Alex Henrie wrote:
> Fixes test failures on Arabic and Hebrew Windows. For some reason, on
> these locales Windows uses a different formula for allocating the
> template buffer, allocating a little more than 2 times the resource
> size on Hebrew and a little less on Arabic. Because we don't know how
> exactly the buffer size is determined on these locales, just accept a
> size near 2 times the resource size.
> 
> Signed-off-by: Alex Henrie <alexhenrie24 at gmail.com>
> ---
>  dlls/comctl32/tests/propsheet.c | 9 +++++++--
>  1 file changed, 7 insertions(+), 2 deletions(-)
> 
> diff --git a/dlls/comctl32/tests/propsheet.c b/dlls/comctl32/tests/propsheet.c
> index a3f910d2d5..68dce519bb 100644
> --- a/dlls/comctl32/tests/propsheet.c
> +++ b/dlls/comctl32/tests/propsheet.c
> @@ -58,16 +58,21 @@ static int CALLBACK sheet_callback(HWND hwnd, UINT msg, LPARAM lparam)
>      case PSCB_PRECREATE:
>        {
>          HMODULE module = GetModuleHandleA("comctl32.dll");
> +        HMODULE kernel32 = GetModuleHandleA("kernel32.dll");
> +        LANGID (WINAPI *pGetThreadUILanguage)(void) = (void *)GetProcAddress(kernel32, "GetThreadUILanguage");
>          DWORD size, buffer_size;
>          HRSRC hrsrc;
> +        int reading_layout;
>  
>          hrsrc = FindResourceA(module, MAKEINTRESOURCEA(1006 /* IDD_PROPSHEET */),
>                  (LPSTR)RT_DIALOG);
>          size = SizeofResource(module, hrsrc);
>          ok(size != 0, "Failed to get size of propsheet dialog resource\n");
>          buffer_size = HeapSize(GetProcessHeap(), 0, (void *)lparam);
> -        ok(buffer_size == 2 * size, "Unexpected template buffer size %u, resource size %u\n",
> -                buffer_size, size);
> +        GetLocaleInfoA(pGetThreadUILanguage ? pGetThreadUILanguage() : GetUserDefaultUILanguage(),
> +                LOCALE_IREADINGLAYOUT | LOCALE_RETURN_NUMBER, (void *)&reading_layout, sizeof(reading_layout));
> +        ok(reading_layout == 2 /* RTL */ ? abs(buffer_size - 2 * size) <= 32 : buffer_size == 2 * size,
> +                "Unexpected template buffer size %u, resource size %u\n", buffer_size, size);
>          break;
>        }
>      case PSCB_INITIALIZED:
> 

Is it possible we're picking wrong resource with FindResource() here?
Maybe we should be using explicit language instead of a neutral one, so

---
propsheet.c:69: Test failed: Unexpected template buffer size 508,
resource size 270
---

could mean we were supposed to pick up a different resource of size 254.

P.S. GetLocaleInfo() takes LCID not LANGID, and you can use special
constants like LOCALE_USER_DEFAULT too.