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// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include <vespa/vespalib/testkit/testapp.h>
#include <vespa/vespalib/stllike/string.h>
#include <vespa/searchlib/util/statefile.h>
#include <atomic>
#include <iostream>
#include <fstream>
#include <string>
#include <vespa/searchlib/test/statefile.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <vespa/log/log.h>
LOG_SETUP("statefile_test");
using namespace search::test::statefile;
namespace search {
namespace {
bool
hasFile(const char *name)
{
return access(name, R_OK | W_OK) == 0;
}
void
addState(StateFile &sf, const char *buf)
{
size_t bufLen = strlen(buf);
sf.addState(buf, bufLen, false);
}
void
addSignalState(StateFile &sf, const char *buf)
{
size_t bufLen = strlen(buf);
sf.addState(buf, bufLen, true);
}
bool
assertHistory(std::vector<vespalib::string> &exp,
std::vector<vespalib::string> &act)
{
if (!EXPECT_EQUAL(exp.size(), act.size())) {
return false;
}
for (size_t i = 0; i < exp.size(); ++i) {
if (!EXPECT_EQUAL(exp[i], act[i])) {
return false;
}
}
return true;
}
int64_t
getSize(const char *name)
{
struct stat stbuf;
if (stat(name, &stbuf) != 0)
return 0;
return stbuf.st_size;
}
void
setSize(const char *name, int64_t newSize)
{
int truncRes = truncate(name, newSize);
(void) truncRes;
assert(truncRes == 0);
}
}
TEST("Test lock free atomic int used by async signal safe lock primitive")
{
std::atomic<int> f;
ASSERT_TRUE(f.is_lock_free());
}
TEST("Test that statefile can be created")
{
StateFile::erase("state");
EXPECT_FALSE(hasFile("state"));
EXPECT_FALSE(hasFile("state.history"));
StateFile sf("state");
EXPECT_TRUE(hasFile("state"));
EXPECT_TRUE(hasFile("state.history"));
EXPECT_EQUAL(0, sf.getGen());
StateFile::erase("state");
EXPECT_FALSE(hasFile("state"));
EXPECT_FALSE(hasFile("state.history"));
StateFile::erase("state");
EXPECT_FALSE(hasFile("state"));
EXPECT_FALSE(hasFile("state.history"));
}
TEST("Test that statefile can add event")
{
StateFile::erase("state");
StateFile sf("state");
addState(sf, "Hello world\n");
vespalib::string check = readState(sf);
EXPECT_EQUAL("Hello world\n", check);
EXPECT_EQUAL(1, sf.getGen());
}
TEST("Test that history is appended to")
{
StateFile::erase("state");
StateFile sf("state");
addState(sf, "Hello world\n");
addState(sf, "Foo bar\n");
vespalib::string check = readState(sf);
EXPECT_EQUAL("Foo bar\n", check);
EXPECT_EQUAL(2, sf.getGen());
{
std::vector<vespalib::string> exp({ "Hello world\n", "Foo bar\n" });
std::vector<vespalib::string> act(readHistory("state.history"));
TEST_DO(assertHistory(exp, act));
}
}
TEST("Test that truncated history is truncated at event boundary")
{
StateFile::erase("state");
int64_t histSize = 1;
{
StateFile sf("state");
addState(sf, "Hello world\n");
addState(sf, "Foo bar\n");
EXPECT_EQUAL(2, sf.getGen());
histSize = getSize("state.history");
EXPECT_EQUAL(20, histSize);
addState(sf, "zap\n");
EXPECT_EQUAL(3, sf.getGen());
}
// Lose 2 last events in history
setSize("state.history", histSize - 1);
// Last event is restored to history from main state file
StateFile sf("state");
vespalib::string check = readState(sf);
EXPECT_EQUAL("zap\n", check);
EXPECT_EQUAL(0, sf.getGen());
{
std::vector<vespalib::string> exp({ "Hello world\n", "zap\n" });
std::vector<vespalib::string> act(readHistory("state.history"));
TEST_DO(assertHistory(exp, act));
}
}
TEST("Test that async signal safe path adds event")
{
StateFile::erase("state");
StateFile sf("state");
addSignalState(sf, "Hello world\n");
addSignalState(sf, "Foo bar\n");
vespalib::string check = readState(sf);
EXPECT_EQUAL("Foo bar\n", check);
EXPECT_EQUAL(2, sf.getGen());
{
std::vector<vespalib::string> exp({ "Hello world\n", "Foo bar\n" });
std::vector<vespalib::string> act(readHistory("state.history"));
TEST_DO(assertHistory(exp, act));
}
}
TEST("Test that state file can be restored from history")
{
StateFile::erase("state");
{
StateFile sf("state");
addState(sf, "Hello world\n");
addState(sf, "Foo bar\n");
EXPECT_EQUAL(2, sf.getGen());
}
// Lose event in main state file
setSize("state", 0);
EXPECT_EQUAL(0, getSize("state"));
// Last event is restored to history from main state file
StateFile sf("state");
EXPECT_NOT_EQUAL(0, getSize("state"));
vespalib::string check = readState(sf);
EXPECT_EQUAL("Foo bar\n", check);
{
std::vector<vespalib::string> exp({ "Hello world\n", "Foo bar\n" });
std::vector<vespalib::string> act(readHistory("state.history"));
TEST_DO(assertHistory(exp, act));
}
}
TEST("Test that different entry is added to history")
{
StateFile::erase("state");
{
StateFile sf("state");
addState(sf, "Hello world\n");
EXPECT_EQUAL(1, sf.getGen());
}
// Write changed entry to main state file
{
std::ofstream of("state");
of << "zap\n";
}
// Add changed event to history
StateFile sf("state");
EXPECT_NOT_EQUAL(0, getSize("state"));
vespalib::string check = readState(sf);
EXPECT_EQUAL("zap\n", check);
{
std::vector<vespalib::string> exp({ "Hello world\n", "zap\n" });
std::vector<vespalib::string> act(readHistory("state.history"));
TEST_DO(assertHistory(exp, act));
}
}
TEST("Test that state history stops at NUL byte")
{
StateFile::erase("state");
{
StateFile sf("state");
addState(sf, "Hello world\n");
addState(sf, "Foo bar\n");
EXPECT_EQUAL(2, sf.getGen());
}
// Corrupt history state file
{
char buf[1];
buf[0] = '\0';
std::ofstream of("state.history");
of.write(&buf[0], 1);
}
StateFile sf("state");
vespalib::string check = readState(sf);
EXPECT_EQUAL("Foo bar\n", check);
{
std::vector<vespalib::string> exp({ "Foo bar\n" });
std::vector<vespalib::string> act(readHistory("state.history"));
TEST_DO(assertHistory(exp, act));
}
}
TEST("Test that main state stops at NUL byte")
{
StateFile::erase("state");
{
StateFile sf("state");
addState(sf, "Hello world\n");
addState(sf, "Foo bar\n");
EXPECT_EQUAL(2, sf.getGen());
}
// Corrupt history state file
{
char buf[10];
strcpy(buf, "zap");
std::ofstream of("state");
of.write(&buf[0], strlen(buf) + 1);
}
StateFile sf("state");
vespalib::string check = readState(sf);
EXPECT_EQUAL("Foo bar\n", check);
{
std::vector<vespalib::string> exp({ "Hello world\n", "Foo bar\n" });
std::vector<vespalib::string> act(readHistory("state.history"));
TEST_DO(assertHistory(exp, act));
}
}
}
TEST_MAIN()
{
TEST_RUN_ALL();
search::StateFile::erase("state");
}
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