[PATCH 1/3] windowscodecs: Test for png codec seeking too far

[Viktor Semykin]

Signed-off-by: Viktor Semykin <thesame.ml at gmail.com>
---
 dlls/windowscodecs/tests/pngformat.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/dlls/windowscodecs/tests/pngformat.c b/dlls/windowscodecs/tests/pngformat.c
index 34cb533335..68a775c8f9 100644
--- a/dlls/windowscodecs/tests/pngformat.c
+++ b/dlls/windowscodecs/tests/pngformat.c
@@ -284,6 +284,8 @@ static IWICBitmapDecoder *create_decoder(const void *image_data, UINT image_size
     IStream *stream;
     GUID format;
     LONG refcount;
+    ULARGE_INTEGER pos;
+    LARGE_INTEGER zero;
 
     hmem = GlobalAlloc(0, image_size);
     data = GlobalLock(hmem);
@@ -302,6 +304,11 @@ static IWICBitmapDecoder *create_decoder(const void *image_data, UINT image_size
     ok(IsEqualGUID(&format, &GUID_ContainerFormatPng),
        "wrong container format %s\n", wine_dbgstr_guid(&format));
 
+    zero.QuadPart = 0;
+    IStream_Seek (stream, zero, STREAM_SEEK_CUR, &pos);
+    todo_wine ok(pos.QuadPart < image_size, "seek beyond the end of stream: %lu >= %u\n",
+        pos.QuadPart, image_size);
+
     refcount = IStream_Release(stream);
     ok(refcount > 0, "expected stream refcount > 0\n");
 
-- 
2.12.1