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reactos/modules/rostests/apitests/winspool/EnumPrinters.c

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/*
* PROJECT: ReactOS Print Spooler DLL API Tests
* LICENSE: GPL-2.0+ (https://spdx.org/licenses/GPL-2.0+)
* PURPOSE: Tests for EnumPrintersA/EnumPrintersW
* COPYRIGHT: Copyright 2015-2017 Colin Finck (colin@reactos.org)
*/
#include <apitest.h>
#define WIN32_NO_STATUS
#include <windef.h>
#include <winbase.h>
#include <wingdi.h>
#include <winspool.h>
START_TEST(EnumPrinters)
{
BYTE TempBuffer[50];
BYTE ZeroBuffer[50] = { 0 };
DWORD cbNeeded;
DWORD cbTemp;
DWORD cchComputerName;
DWORD dwReturned;
PPRINTER_INFO_1W pPrinterInfo1;
PVOID pMem;
DWORD Level;
WCHAR wszComputerName[2 + MAX_COMPUTERNAME_LENGTH + 2 + 1];
wszComputerName[0] = L'\\';
wszComputerName[1] = L'\\';
cchComputerName = MAX_COMPUTERNAME_LENGTH + 1;
if (!GetComputerNameW(&wszComputerName[2], &cchComputerName))
{
skip("GetComputerNameW failed with error %lu!\n", GetLastError());
return;
}
cchComputerName += 2;
// Verify that EnumPrintersW returns success and zeroes all input variables even though no flag has been specified.
memset(TempBuffer, 0xDE, sizeof(TempBuffer));
cbNeeded = 0xDEADBEEF;
dwReturned = 0xDEADBEEF;
SetLastError(0xDEADBEEF);
ok(EnumPrintersW(0, NULL, 1, TempBuffer, sizeof(TempBuffer), &cbNeeded, &dwReturned), "EnumPrintersW returns FALSE\n");
ok(GetLastError() == ERROR_SUCCESS, "EnumPrintersW returns error %lu!\n", GetLastError());
ok(memcmp(TempBuffer, ZeroBuffer, sizeof(TempBuffer)) == 0, "TempBuffer has not been zeroed!\n");
ok(cbNeeded == 0, "cbNeeded is %lu!\n", cbNeeded);
ok(dwReturned == 0, "dwReturned is %lu!\n", dwReturned);
// Level 5 is the highest supported under Windows Server 2003. Higher levels need to fail and leave the variables untouched!
cbNeeded = 0xDEADBEEF;
dwReturned = 0xDEADBEEF;
SetLastError(0xDEADBEEF);
ok(!EnumPrintersW(0, NULL, 6, NULL, 0, &cbNeeded, &dwReturned), "EnumPrintersW returns TRUE!\n");
ok(GetLastError() == ERROR_INVALID_LEVEL, "EnumPrintersW returns error %lu!\n", GetLastError());
ok(cbNeeded == 0xDEADBEEF, "cbNeeded is %lu!\n", cbNeeded);
ok(dwReturned == 0xDEADBEEF, "dwReturned is %lu!\n", dwReturned);
// Same goes for level 3.
cbNeeded = 0xDEADBEEF;
dwReturned = 0xDEADBEEF;
SetLastError(0xDEADBEEF);
ok(!EnumPrintersW(0, NULL, 3, NULL, 0, &cbNeeded, &dwReturned), "EnumPrintersW returns TRUE!\n");
ok(GetLastError() == ERROR_INVALID_LEVEL, "EnumPrintersW returns error %lu!\n", GetLastError());
ok(cbNeeded == 0xDEADBEEF, "cbNeeded is %lu!\n", cbNeeded);
ok(dwReturned == 0xDEADBEEF, "dwReturned is %lu!\n", dwReturned);
// Try for all levels. Level 0 is valid here and returns the PRINTER_INFO_STRESS structure (documented in MS-RPRN).
for (Level = 0; Level <= 5; Level++)
{
if (Level == 3)
continue;
// Try with no valid arguments at all.
SetLastError(0xDEADBEEF);
ok(!EnumPrintersW(0, NULL, Level, NULL, 0, NULL, NULL), "EnumPrintersW returns TRUE for Level %lu!\n", Level);
ok(GetLastError() == RPC_X_NULL_REF_POINTER, "EnumPrintersW returns error %lu for Level %lu!\n", GetLastError(), Level);
// It has to succeed if we supply the required pointers and query no information.
SetLastError(0xDEADBEEF);
ok(EnumPrintersW(0, NULL, Level, NULL, 0, &cbNeeded, &dwReturned), "EnumPrintersW returns FALSE for Level %lu!\n", Level);
ok(GetLastError() == ERROR_SUCCESS, "EnumPrintersW returns error %lu for Level %lu!\n", GetLastError(), Level);
ok(cbNeeded == 0, "cbNeeded is %lu for Level %lu!\n", cbNeeded, Level);
ok(dwReturned == 0, "dwReturned is %lu for Level %lu!\n", dwReturned, Level);
// This constant is from Windows 9x/ME times and mustn't work anymore.
SetLastError(0xDEADBEEF);
ok(EnumPrintersW(PRINTER_ENUM_DEFAULT, NULL, Level, NULL, 0, &cbNeeded, &dwReturned), "EnumPrintersW returns FALSE for Level %lu!\n", Level);
ok(GetLastError() == ERROR_SUCCESS, "EnumPrintersW returns error %lu for Level %lu!\n", GetLastError(), Level);
ok(cbNeeded == 0, "cbNeeded is %lu for Level %lu!\n", cbNeeded, Level);
ok(dwReturned == 0, "dwReturned is %lu for Level %lu!\n", dwReturned, Level);
// Now things get interesting. Let's query the buffer size for information about the local printers.
SetLastError(0xDEADBEEF);
ok(!EnumPrintersW(PRINTER_ENUM_LOCAL, NULL, Level, NULL, 0, &cbNeeded, &dwReturned), "EnumPrintersW returns TRUE for Level %lu!\n", Level);
ok(GetLastError() == ERROR_INSUFFICIENT_BUFFER, "EnumPrintersW returns error %lu for Level %lu!\n", GetLastError(), Level);
ok(dwReturned == 0, "dwReturned is %lu for Level %lu!\n", dwReturned, Level);
// There need to be installed local printers for the next steps.
if (cbNeeded > 0)
{
// Same error has to occur with no buffer, but a size < 4 (AlignRpcPtr comes into play here).
SetLastError(0xDEADBEEF);
ok(!EnumPrintersW(PRINTER_ENUM_LOCAL, NULL, Level, NULL, 1, &cbNeeded, &dwReturned), "EnumPrintersW returns TRUE for Level %lu!\n", Level);
ok(GetLastError() == ERROR_INSUFFICIENT_BUFFER, "EnumPrintersW returns error %lu for Level %lu!\n", GetLastError(), Level);
ok(cbNeeded > 0, "cbNeeded is 0 for Level %lu!\n", Level);
ok(dwReturned == 0, "dwReturned is %lu for Level %lu!\n", dwReturned, Level);
// Now provide the demanded size, but no buffer.
SetLastError(0xDEADBEEF);
ok(!EnumPrintersW(PRINTER_ENUM_LOCAL, NULL, Level, NULL, cbNeeded, &cbTemp, &dwReturned), "EnumPrintersW returns TRUE for Level %lu!\n", Level);
ok(GetLastError() == ERROR_INVALID_USER_BUFFER, "EnumPrintersW returns error %lu for Level %lu!\n", GetLastError(), Level);
ok(cbTemp == 0, "cbTemp is %lu for Level %lu!\n", cbTemp, Level);
ok(dwReturned == 0, "dwReturned is %lu for Level %lu!\n", dwReturned, Level);
// Finally use the function as intended and aim for success!
// After that, cbTemp contains the needed buffer size without the computer name prepended.
pMem = HeapAlloc(GetProcessHeap(), 0, cbNeeded);
SetLastError(0xDEADBEEF);
ok(EnumPrintersW(PRINTER_ENUM_LOCAL, NULL, Level, pMem, cbNeeded, &cbTemp, &dwReturned), "EnumPrintersW returns FALSE for Level %lu!\n", Level);
ok(GetLastError() == ERROR_SUCCESS, "EnumPrintersW returns error %lu for Level %lu!\n", GetLastError(), Level);
HeapFree(GetProcessHeap(), 0, pMem);
if (Level != 4)
{
// Show that the Name parameter is checked when PRINTER_ENUM_NAME is also specified.
SetLastError(0xDEADBEEF);
ok(!EnumPrintersW(PRINTER_ENUM_LOCAL | PRINTER_ENUM_NAME, L"LOREM IPSUM", Level, NULL, 0, &cbNeeded, &dwReturned), "EnumPrintersW returns TRUE for Level %lu!\n", Level);
ok(GetLastError() != ERROR_INSUFFICIENT_BUFFER, "EnumPrintersW returns error %lu for Level %lu!\n", GetLastError(), Level);
ok(cbNeeded == 0, "cbNeeded is %lu for Level %lu!\n", cbNeeded, Level);
ok(dwReturned == 0, "dwReturned is %lu for Level %lu!\n", dwReturned, Level);
}
// Show that the structure is returned with its known size again when PRINTER_ENUM_NAME is specified and Name
// is the (case-insensitively compared) name of the Local Print Provider.
SetLastError(0xDEADBEEF);
ok(!EnumPrintersW(PRINTER_ENUM_LOCAL | PRINTER_ENUM_NAME, L"wInDoWs NT Local Print Providor", Level, NULL, 0, &cbNeeded, &dwReturned), "EnumPrintersW returns TRUE for Level %lu!\n", Level);
ok(GetLastError() == ERROR_INSUFFICIENT_BUFFER, "EnumPrintersW returns error %lu for Level %lu!\n", GetLastError(), Level);
ok(cbNeeded == cbTemp, "cbNeeded is %lu, reference size is %lu for Level %lu!\n", cbNeeded, cbTemp, Level);
ok(dwReturned == 0, "dwReturned is %lu for Level %lu!\n", dwReturned, Level);
// Now we specify the correct "\\COMPUTERNAME" for Name.
// The returned structure should have some strings prepended with the Computer Name and thus require a larger buffer.
SetLastError(0xDEADBEEF);
ok(!EnumPrintersW(PRINTER_ENUM_LOCAL | PRINTER_ENUM_NAME, wszComputerName, Level, NULL, 0, &cbNeeded, &dwReturned), "EnumPrintersW returns TRUE for Level %lu!\n", Level);
ok(GetLastError() == ERROR_INSUFFICIENT_BUFFER, "EnumPrintersW returns error %lu for Level %lu!\n", GetLastError(), Level);
ok(cbNeeded > cbTemp, "cbNeeded is %lu, reference size is %lu for Level %lu!\n", cbNeeded, cbTemp, Level);
ok(dwReturned == 0, "dwReturned is %lu for Level %lu!\n", dwReturned, Level);
if (Level != 4)
{
// This won't work when there is a trailing backslash (i.e. "\\COMPUTERNAME\").
wszComputerName[cchComputerName++] = L'\\';
wszComputerName[cchComputerName] = 0;
SetLastError(0xDEADBEEF);
ok(!EnumPrintersW(PRINTER_ENUM_LOCAL | PRINTER_ENUM_NAME, wszComputerName, Level, NULL, 0, &cbNeeded, &dwReturned), "EnumPrintersW returns TRUE for Level %lu!\n", Level);
ok(GetLastError() == ERROR_INVALID_NAME, "EnumPrintersW returns error %lu for Level %lu!\n", GetLastError(), Level);
ok(cbNeeded == 0, "cbNeeded is %lu for Level %lu!\n", cbNeeded, Level);
ok(dwReturned == 0, "dwReturned is %lu for Level %lu!\n", dwReturned, Level);
wszComputerName[--cchComputerName] = 0;
}
// Now it gets funky. There are also cases where EnumPrintersW takes the Name parameter into account,
// although PRINTER_ENUM_NAME is not given.
// A bogus Name without two backslashes is ignored.
SetLastError(0xDEADBEEF);
ok(!EnumPrintersW(PRINTER_ENUM_LOCAL, L"LOREM IPSUM", Level, NULL, 0, &cbNeeded, &dwReturned), "EnumPrintersW returns TRUE for Level %lu!\n", Level);
ok(GetLastError() == ERROR_INSUFFICIENT_BUFFER, "EnumPrintersW returns error %lu for Level %lu!\n", GetLastError(), Level);
ok(cbNeeded == cbTemp, "cbNeeded is %lu, reference size is %lu for Level %lu!\n", cbNeeded, cbTemp, Level);
ok(dwReturned == 0, "dwReturned is %lu for Level %lu!\n", dwReturned, Level);
// Specifying "\\COMPUTERNAME" again prepends it to some strings.
SetLastError(0xDEADBEEF);
ok(!EnumPrintersW(PRINTER_ENUM_LOCAL, wszComputerName, Level, NULL, 0, &cbNeeded, &dwReturned), "EnumPrintersW returns TRUE for Level %lu!\n", Level);
ok(GetLastError() == ERROR_INSUFFICIENT_BUFFER, "EnumPrintersW returns error %lu for Level %lu!\n", GetLastError(), Level);
ok(cbNeeded > cbTemp, "cbNeeded is %lu, reference size is %lu for Level %lu!\n", cbNeeded, cbTemp, Level);
ok(dwReturned == 0, "dwReturned is %lu for Level %lu!\n", dwReturned, Level);
// Specifying "\\COMPUTERNAME\" also verifies the Computer Name, but doesn't prepend it.
// This logic is crazy, and different to PRINTER_ENUM_NAME...
wszComputerName[cchComputerName++] = L'\\';
wszComputerName[cchComputerName] = 0;
SetLastError(0xDEADBEEF);
ok(!EnumPrintersW(PRINTER_ENUM_LOCAL, wszComputerName, Level, NULL, 0, &cbNeeded, &dwReturned), "EnumPrintersW returns TRUE for Level %lu!\n", Level);
ok(GetLastError() == ERROR_INSUFFICIENT_BUFFER, "EnumPrintersW returns error %lu for Level %lu!\n", GetLastError(), Level);
ok(cbNeeded == cbTemp, "cbNeeded is %lu for Level %lu!\n", cbNeeded, Level);
ok(dwReturned == 0, "dwReturned is %lu for Level %lu!\n", dwReturned, Level);
// I can even put an additional bogus character after the trailing backslash, doesn't change anything.
wszComputerName[cchComputerName++] = L'a';
wszComputerName[cchComputerName] = 0;
SetLastError(0xDEADBEEF);
ok(!EnumPrintersW(PRINTER_ENUM_LOCAL, wszComputerName, Level, NULL, 0, &cbNeeded, &dwReturned), "EnumPrintersW returns TRUE for Level %lu!\n", Level);
ok(GetLastError() == ERROR_INSUFFICIENT_BUFFER, "EnumPrintersW returns error %lu for Level %lu!\n", GetLastError(), Level);
ok(cbNeeded == cbTemp, "cbNeeded is %lu for Level %lu!\n", cbNeeded, Level);
ok(dwReturned == 0, "dwReturned is %lu for Level %lu!\n", dwReturned, Level);
cchComputerName -= 2;
wszComputerName[cchComputerName] = 0;
}
else
{
skip("cbNeeded is 0 on Level %lu, skipping additional tests!\n", Level);
}
}
// Using EnumPrintersW with PRINTER_ENUM_NAME, Level 1 and no Name must return information about the Print Providers.
// First record must always be the Local Print Provider.
SetLastError(0xDEADBEEF);
ok(!EnumPrintersW(PRINTER_ENUM_LOCAL | PRINTER_ENUM_NAME, NULL, 1, NULL, 0, &cbNeeded, &dwReturned), "EnumPrintersW returns TRUE!\n");
ok(GetLastError() == ERROR_INSUFFICIENT_BUFFER, "EnumPrintersW returns error %lu!\n", GetLastError());
ok(cbNeeded > 0, "cbNeeded is 0!\n");
ok(dwReturned == 0, "dwReturned is %lu!\n", dwReturned);
SetLastError(0xDEADBEEF);
pPrinterInfo1 = (PPRINTER_INFO_1W)HeapAlloc(GetProcessHeap(), 0, cbNeeded);
ok(EnumPrintersW(PRINTER_ENUM_LOCAL | PRINTER_ENUM_NAME, NULL, 1, (PBYTE)pPrinterInfo1, cbNeeded, &cbTemp, &dwReturned), "EnumPrintersW returns FALSE!\n");
ok(GetLastError() == ERROR_SUCCESS, "EnumPrintersW returns error %lu!\n", GetLastError());
ok(cbTemp == cbNeeded, "cbTemp is %lu, cbNeeded is %lu!\n", cbTemp, cbNeeded);
ok(dwReturned > 0, "dwReturned is %lu!\n", dwReturned);
ok(!wcscmp(pPrinterInfo1->pName, L"Windows NT Local Print Providor"), "pPrinterInfo1->pName is %S!\n", pPrinterInfo1->pName);
ok(!wcscmp(pPrinterInfo1->pComment, L"Locally connected Printers"), "pPrinterInfo1->pComment is %S!\n", pPrinterInfo1->pComment);
ok(!wcscmp(pPrinterInfo1->pDescription, L"Windows NT Local Printers"), "pPrinterInfo1->pDescription is %S!\n", pPrinterInfo1->pDescription);
HeapFree(GetProcessHeap(), 0, pPrinterInfo1);
}
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