kernel32/tests: Add some tests for GetLongPathNameW.

dlls/kernel32/tests/path.c

@@ -1065,12 +1065,20 @@ static void test_GetLongPathNameA(void)
 
 static void test_GetLongPathNameW(void)
 {
-    DWORD length; 
+    DWORD length, expanded;
+    BOOL ret;
+    HANDLE file;
     WCHAR empty[MAX_PATH];
+    WCHAR tempdir[MAX_PATH], name[200];
+    WCHAR dirpath[4 + MAX_PATH + 200]; /* To ease removal */
+    WCHAR shortpath[4 + MAX_PATH + 200 + 1 + 200];
+    static const WCHAR prefix[] = { '\\','\\','?','\\', 0};
+    static const WCHAR backslash[] = { '\\', 0};
+    static const WCHAR letterX[] = { 'X', 0};
+
+    if (!pGetLongPathNameW)
+        return;
 
-    /* Not present in all windows versions */
-    if(pGetLongPathNameW) 
-    {
     SetLastError(0xdeadbeef); 
     length = pGetLongPathNameW(NULL,NULL,0);
     if (GetLastError() == ERROR_CALL_NOT_IMPLEMENTED)
@@ -1086,7 +1094,73 @@ static void test_GetLongPathNameW(void)
     length = pGetLongPathNameW(empty,NULL,0);
     ok(0==length,"GetLongPathNameW returned %d but expected 0\n",length);
     ok(GetLastError()==ERROR_PATH_NOT_FOUND,"GetLastError returned %d but expected ERROR_PATH_NOT_FOUND\n",GetLastError());
+
+    /* Create a long path name. The path needs to exist for these tests to
+     * succeed so we need the "\\?\" prefix when creating directories and
+     * files.
+     */
+    name[0] = 0;
+    while (lstrlenW(name) < (sizeof(name)/sizeof(WCHAR) - 1))
+        lstrcatW(name, letterX);
+
+    GetTempPathW(MAX_PATH, tempdir);
+
+    lstrcpyW(shortpath, prefix);
+    lstrcatW(shortpath, tempdir);
+    lstrcatW(shortpath, name);
+    lstrcpyW(dirpath, shortpath);
+    ret = CreateDirectoryW(shortpath, NULL);
+    ok(ret, "Could not create the temporary directory : %d\n", GetLastError());
+    lstrcatW(shortpath, backslash);
+    lstrcatW(shortpath, name);
+
+    /* Path does not exist yet and we know it overruns MAX_PATH */
+
+    /* No prefix */
+    SetLastError(0xdeadbeef);
+    length = pGetLongPathNameW(shortpath + 4, NULL, 0);
+    ok(length == 0, "Expected 0, got %d\n", length);
+    todo_wine
+    ok(GetLastError() == ERROR_PATH_NOT_FOUND,
+       "Expected ERROR_PATH_NOT_FOUND, got %d\n", GetLastError());
+    /* With prefix */
+    SetLastError(0xdeadbeef);
+    length = pGetLongPathNameW(shortpath, NULL, 0);
+    todo_wine
+    {
+    ok(length == 0, "Expected 0, got %d\n", length);
+    ok(GetLastError() == ERROR_FILE_NOT_FOUND,
+       "Expected ERROR_PATH_NOT_FOUND, got %d\n", GetLastError());
+    }
+
+    file = CreateFileW(shortpath, GENERIC_READ|GENERIC_WRITE, 0, NULL,
+                       CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
+    ok(file != INVALID_HANDLE_VALUE,
+       "Could not create the temporary file : %d.\n", GetLastError());
+    CloseHandle(file);
+
+    /* Path exists */
+
+    /* No prefix */
+    SetLastError(0xdeadbeef);
+    length = pGetLongPathNameW(shortpath + 4, NULL, 0);
+    todo_wine
+    {
+    ok(length == 0, "Expected 0, got %d\n", length);
+    ok(GetLastError() == ERROR_PATH_NOT_FOUND, "Expected ERROR_PATH_NOT_FOUND, got %d\n", GetLastError());
     }
+    /* With prefix */
+    expanded = 4 + (pGetLongPathNameW(tempdir, NULL, 0) - 1) + lstrlenW(name) + 1 + lstrlenW(name) + 1;
+    SetLastError(0xdeadbeef);
+    length = pGetLongPathNameW(shortpath, NULL, 0);
+    ok(length == expanded, "Expected %d, got %d\n", expanded, length);
+
+    /* NULL buffer with length crashes on Windows */
+    if (0)
+    length = pGetLongPathNameW(shortpath, NULL, 20);
+
+    ok(DeleteFileW(shortpath), "Could not delete temporary file\n");
+    ok(RemoveDirectoryW(dirpath), "Could not delete temporary directory\n");
 }
 
 static void test_GetShortPathNameW(void)