TEST_F(TestFileCache, AutodetectNewCache) {
// Make a quick new cache file on disk.
CacheManager cm;
ASSERT_TRUE(cm.addEmptyEntry("test_entry"));
string temp_dir;
ASSERT_TRUE(makeTempDir(&temp_dir));
string cache_fn(temp_dir);
cache_fn.append("/cache.dump");
ASSERT_TRUE(cm.saveCache(cache_fn));
// Now make sure this file-cache is in default mode.
FileCache fc;
FileCache::UseNewCache = false;
fc.loadMmap(cache_fn.c_str(), 1);
ASSERT_TRUE(fc.exists("test_entry"));
}
TEST_F(TestFileCache, WriteAndReadBack) {
// Set up something for FileCache to read in.
char data_fn[] = "/tmp/hhvm_unit_test-testdata.XXXXXX";
int data_fd = mkstemp(data_fn);
ASSERT_GT(data_fd, 0);
FILE* f = fdopen(data_fd, "w");
ASSERT_TRUE(f != nullptr);
fprintf(f, "%s", kTestData);
fclose(f);
// Set up a cache and put this data file in it.
FileCache fc;
fc.write("_unit_test_one_", data_fn);
fc.write("_unit_test_two_");
fc.write("/__invalid__/path/with/directories");
std::string temp_dir;
ASSERT_TRUE(makeTempDir(&temp_dir));
std::string cache_fn(temp_dir);
cache_fn.append("/cache.dump");
// Flush to disk.
fc.save(cache_fn.c_str());
// Read back into another cache.
FileCache fc2;
fc2.loadMmap(cache_fn.c_str());
EXPECT_TRUE(fc2.fileExists("_unit_test_one_"));
int read_len;
bool compressed = false;
const char* read_data = fc2.read("_unit_test_one_", read_len, compressed);
EXPECT_STREQ(kTestData, read_data);
EXPECT_EQ(fc2.fileSize("_unit_test_one_", false), strlen(kTestData));
EXPECT_TRUE(fc2.fileExists("_unit_test_two_"));
EXPECT_FALSE(fc2.fileExists("_unit_test_three_"));
EXPECT_TRUE(fc2.dirExists("/__invalid__"));
EXPECT_TRUE(fc2.dirExists("/__invalid__/path"));
EXPECT_TRUE(fc2.dirExists("/__invalid__/path/with"));
EXPECT_TRUE(fc2.fileExists("/__invalid__/path/with/directories"));
// -1 is a magic value... here it means "it's a PHP file"...
EXPECT_EQ(fc2.fileSize("unit_test_two_", false), -1);
// ... and here it means "this thing does not exist".
EXPECT_EQ(fc2.fileSize("unit_test_three_", false), -1);
fc2.dump();
// Clean up the mess.
ASSERT_EQ(unlink(cache_fn.c_str()), 0);
ASSERT_EQ(rmdir(temp_dir.c_str()), 0);
ASSERT_EQ(unlink(data_fn), 0);
}
TEST_F(TestFileCache, HighlyCompressibleData) {
char data_fn[] = "/tmp/hhvm_unit_test-testdata.XXXXXX";
int data_fd = mkstemp(data_fn);
ASSERT_GT(data_fd, 0);
FILE* f = fdopen(data_fd, "w");
ASSERT_TRUE(f != nullptr);
std::string test_path = "/path/to/data";
std::string test_data;
for (int i = 0; i < 10; ++i) {
test_data.append("AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA");
}
fprintf(f, "%s", test_data.c_str());
fclose(f);
FileCache fc;
fc.write(test_path.c_str(), data_fn);
// Flush to disk.
std::string temp_dir;
ASSERT_TRUE(makeTempDir(&temp_dir));
std::string cache_fn(temp_dir);
cache_fn.append("/cache.dump");
fc.save(cache_fn.c_str());
// Read back into another cache.
int read_len;
bool compressed;
const char* read_data;
FileCache fc3;
fc3.loadMmap(cache_fn.c_str());
fc3.dump();
ASSERT_TRUE(fc3.fileExists(test_path.c_str()));
// Ask for uncompressed data (a holdover from the original API).
compressed = false;
read_data = fc3.read(test_path.c_str(), read_len, compressed);
// FileCache::read() takes compressed as a non-const reference (!)
// and changes the value according to what it found...
// ... so this means "I just gave you compressed data".
EXPECT_TRUE(compressed);
// ... so these can't match.
EXPECT_NE(test_data, read_data);
EXPECT_NE(test_data.length(), read_len);
// But this always gets the uncompressed size no matter what.
EXPECT_EQ(test_data.length(), fc3.fileSize(test_path.c_str(), false));
// So now let's actually ask for compressed data this time.
compressed = true;
read_data = fc3.read(test_path.c_str(), read_len, compressed);
// Same conditions should hold.
EXPECT_TRUE(compressed);
EXPECT_NE(test_data, read_data);
EXPECT_EQ(test_data.length(), fc3.fileSize(test_path.c_str(), false));
// Clean up the mess.
ASSERT_EQ(unlink(cache_fn.c_str()), 0);
ASSERT_EQ(rmdir(temp_dir.c_str()), 0);
ASSERT_EQ(unlink(data_fn), 0);
}