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test: check if zeInitDrivers produces output #319

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84 changes: 82 additions & 2 deletions test/loader_api.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -12,14 +12,79 @@
#include "ze_api.h"
#include "zes_api.h"

#include <fstream>

#if defined(__linux__)
#include <cstdlib>
#include <sys/types.h>
#include <unistd.h>
#elif defined(_WIN32)
#include <cstdio>
#include <io.h>
#include <fcntl.h>
#endif

#if defined(_WIN32)
#define putenv_safe _putenv
#define putenv_safe _putenv
#else
#define putenv_safe putenv
#define putenv_safe putenv
#endif

namespace {

class CaptureOutput {
private:
int original_fd;
int fd;
int stream;
std::string filename;

public:
enum { Stdout = 1, Stderr = 2 };

CaptureOutput(int stream_) : stream(stream_) {
original_fd = _dup(stream);
#if defined(__linux__)
filename = "/tmp/capture_output_XXXXXX";
fd = mkstemp(filename.data());
#elif defined(_WIN32)
char buffer[50];
tmpnam_s(buffer, 50);
filename = std::string(buffer);
std::cout << filename << "\n";
std::cout << _sopen_s(&fd, filename.c_str(), _O_CREAT | _O_RDWR, _SH_DENYNO, _S_IREAD | _S_IWRITE);
#endif
fflush(nullptr);
_dup2(fd, stream);
_close(fd);
}

~CaptureOutput() {
if (original_fd != -1) {
fflush(nullptr);
_dup2(original_fd, stream);
_close(original_fd);
original_fd = -1;
}
if (remove(filename.c_str()) != 0) {
std::cerr << "Deleting file " << filename.c_str() << " failed.";
}
}

std::string GetOutput() {
if (original_fd != -1) {
fflush(nullptr);
_dup2(original_fd, stream);
_close(original_fd);
original_fd = -1;
}
std::ifstream stream(filename);
std::string output = std::string((std::istreambuf_iterator<char>(stream)),
std::istreambuf_iterator<char>());
return output;
}
};

TEST(
LoaderAPI,
GivenLevelZeroLoaderPresentWhenCallingzeGetLoaderVersionsAPIThenValidVersionIsReturned) {
Expand Down Expand Up @@ -357,6 +422,21 @@ TEST(
EXPECT_GT(pDriverGetCount, 0);
}

TEST(
LoaderInit,
GivenZeInitDriverWhenCalledThenNoOutputIsPrintedToStdout) {
uint32_t pInitDriversCount = 0;
ze_init_driver_type_desc_t desc = { ZE_STRUCTURE_TYPE_INIT_DRIVER_TYPE_DESC };
desc.flags = UINT32_MAX;
desc.pNext = nullptr;

CaptureOutput capture(CaptureOutput::Stdout);
EXPECT_EQ(ZE_RESULT_SUCCESS, zeInitDrivers(&pInitDriversCount, nullptr, &desc));

std::string output = capture.GetOutput();
EXPECT_TRUE(output.empty());
}

TEST(
LoaderTearDown,
GivenLoaderNotInDestructionStateWhenCallingzelCheckIsLoaderInTearDownThenFalseIsReturned) {
Expand Down