Add clang-tidy checking for unit tests

.clang-tidy

@@ -1,7 +1,7 @@
 # refer to https://clang.llvm.org/extra/clang-tidy/checks/list.html
 Checks: -*, clang-analyzer-core.*, clang-analyzer-cplusplus.*, clang-analyzer-deadcode.*, clang-analyzer-nullability.*, clang-analyzer-security.*, clang-analyzer-unix.*, clang-analyzer-valist.*, cppcoreguidelines-init-variables, cppcoreguidelines-macro-usage, cppcoreguidelines-interfaces-global-init, cppcoreguidelines-narrowing-conversions, cppcoreguidelines-no-malloc, cppcoreguidelines-prefer-member-initializer, cppcoreguidelines-special-member-functions, cppcoreguidelines-slicing, google-build-explicit-make-pair, google-default-arguments, google-explicit-constructor, modernize-avoid-bind, modernize-loop-convert, modernize-macro-to-enum, modernize-make-shared, modernize-make-unique, modernize-pass-by-value, modernize-redundant-void-arg, modernize-return-braced-init-list, modernize-use-auto, modernize-use-bool-literals, modernize-use-emplace, modernize-use-equals-default, modernize-use-equals-delete, modernize-use-nullptr, modernize-use-override, modernize-use-using, performance-faster-string-find, performance-for-range-copy, performance-implicit-conversion-in-loop, performance-inefficient-algorithm, performance-inefficient-vector-operation, performance-move-const-arg, performance-move-constructor-init, performance-no-automatic-move, performance-trivially-destructible, performance-type-promotion-in-math-fn, performance-unnecessary-copy-initialization, performance-unnecessary-value-param
 
-WarningsAsErrors: clang-analyzer-*, -clang-analyzer-security.insecureAPI.rand, cppcoreguidelines-interfaces-global-init, cppcoreguidelines-no-malloc, cppcoreguidelines-slicing, google-*, modernize-use-emplace, modernize-use-equals-default, modernize-use-equals-delete, performance-implicit-conversion-in-loop, performance-inefficient-algorithm, performance-move-constructor-init, performance-no-automatic-move, performance-trivially-destructible, performance-type-promotion-in-math-fn, performance-unnecessary-copy-initialization, modernize-use-bool-literals, performance-unnecessary-value-param, modernize-make-unique, performance-for-range-copy, performance-faster-string-find, modernize-redundant-void-arg, modernize-avoid-bind, modernize-use-auto, modernize-use-using, performance-inefficient-vector-operation, cppcoreguidelines-special-member-functions, modernize-loop-convert, cppcoreguidelines-init-variables, modernize-use-nullptr, cppcoreguidelines-macro-usage, cppcoreguidelines-narrowing-conversions, modernize-return-braced-init-list
+WarningsAsErrors: clang-analyzer-*, -clang-analyzer-security.insecureAPI.rand, google-*, performance-*, cppcoreguidelines-*, modernize-*
 
 CheckOptions:
   - key:           cppcoreguidelines-special-member-functions.AllowSoleDefaultDtor

src/server/tls_util.cc

@@ -194,7 +194,7 @@ UniqueSSLContext CreateSSLContext(const Config *config, const SSL_METHOD *method
     SSL_CTX_set_default_passwd_cb(ssl_ctx.get(), [](char *buf, int size, int, void *cfg) -> int {
       strncpy(buf, static_cast<const Config *>(cfg)->tls_key_file_pass.c_str(), size);
       buf[size - 1] = '\0';
-      return strlen(buf);
+      return static_cast<int>(strlen(buf));
     });
   }
 

tests/cppunit/cluster_test.cc

@@ -113,8 +113,8 @@ TEST(Cluster, CluseterGetNodes) {
 
   std::vector<std::string> vnodes = Util::Split(output_nodes, "\n");
 
-  for (unsigned i = 0; i < vnodes.size(); i++) {
-    std::vector<std::string> node_fields = Util::Split(vnodes[i], " ");
+  for (const auto &vnode : vnodes) {
+    std::vector<std::string> node_fields = Util::Split(vnode, " ");
 
     if (node_fields[0] == "07c37dfeb235213a872192d90877d0cd55635b91") {
       ASSERT_TRUE(node_fields.size() == 8);

tests/cppunit/cron_test.cc

@@ -39,7 +39,7 @@ class CronTest : public testing::Test {
 };
 
 TEST_F(CronTest, IsTimeMatch) {
-  std::time_t t = std::time(0);
+  std::time_t t = std::time(nullptr);
   std::tm *now = std::localtime(&t);
   now->tm_hour = 3;
   ASSERT_TRUE(cron->IsTimeMatch(now));

tests/cppunit/disk_test.cc

@@ -161,7 +161,7 @@ TEST_F(RedisDiskTest, BitmapDisk) {
     EXPECT_TRUE(bitmap->SetBit(key_, i, true, &bit).ok());
     approximate_size += key_.size() + 8 + std::to_string(i / 1024 / 8).size();
   }
-  uint64_t key_size;
+  uint64_t key_size = 0;
   EXPECT_TRUE(disk->GetKeySize(key_, kRedisBitmap, &key_size).ok());
   EXPECT_GE(key_size, approximate_size * estimation_factor_);
   EXPECT_LE(key_size, approximate_size / estimation_factor_);
@@ -172,13 +172,13 @@ TEST_F(RedisDiskTest, SortedintDisk) {
   std::unique_ptr<Redis::Sortedint> sortedint = std::make_unique<Redis::Sortedint>(storage_, "disk_ns_sortedint");
   std::unique_ptr<Redis::Disk> disk = std::make_unique<Redis::Disk>(storage_, "disk_ns_sortedint");
   key_ = "sortedintdisk_key";
-  int ret;
+  int ret = 0;
   uint64_t approximate_size = 0;
   for (int i = 0; i < 100000; i++) {
     EXPECT_TRUE(sortedint->Add(key_, std::vector<uint64_t>{uint64_t(i)}, &ret).ok() && ret == 1);
     approximate_size += key_.size() + 8 + 8;
   }
-  uint64_t key_size;
+  uint64_t key_size = 0;
   EXPECT_TRUE(disk->GetKeySize(key_, kRedisSortedint, &key_size).ok());
   EXPECT_GE(key_size, approximate_size * estimation_factor_);
   EXPECT_LE(key_size, approximate_size / estimation_factor_);
@@ -199,7 +199,7 @@ TEST_F(RedisDiskTest, StreamDisk) {
     EXPECT_TRUE(s.ok());
     approximate_size += key_.size() + 8 + 8 + values[0].size() + values[1].size();
   }
-  uint64_t key_size;
+  uint64_t key_size = 0;
   EXPECT_TRUE(disk->GetKeySize(key_, kRedisStream, &key_size).ok());
   EXPECT_GE(key_size, approximate_size * estimation_factor_);
   EXPECT_LE(key_size, approximate_size / estimation_factor_);

tests/cppunit/observer_or_unique_test.cc

@@ -39,14 +39,13 @@ TEST(ObserverOrUniquePtr, Unique) {
 
 TEST(CompositePtr, Observer) {
   int v = 0;
-  Counter* c = nullptr;
+  std::unique_ptr<Counter> c = nullptr;
   {
     ObserverOrUniquePtr<Counter> observer(new Counter{&v}, ObserverOrUnique::Observer);
     ASSERT_EQ(v, 1);
 
-    c = observer.Get();
+    c.reset(observer.Get());
   }
   ASSERT_EQ(v, 1);
-  delete c;
   ASSERT_EQ(v, 0);
 }

tests/cppunit/parse_util.cc

@@ -22,8 +22,8 @@
 #include <parse_util.h>
 
 TEST(ParseUtil, TryParseInt) {
-  long long v;
-  const char *str = "12345hellooo", *end;
+  long long v = 0;
+  const char *str = "12345hellooo", *end = nullptr;
 
   std::tie(v, end) = *TryParseInt(str);
   ASSERT_EQ(v, 12345);

tests/cppunit/status_test.cc

@@ -77,15 +77,15 @@ TEST(StatusOr, Scalar) {
 }
 
 TEST(StatusOr, String) {
-  auto f = [](std::string x) -> StatusOr<std::string> {
+  auto f = [](std::string x) -> StatusOr<std::string> {  // NOLINT
     if (x.size() > 10) {
       return {Status::NotOK, "string too long"};
     }
 
     return x + " hello";
   };
 
-  auto g = [f](std::string x) -> StatusOr<std::string> {
+  auto g = [f](std::string x) -> StatusOr<std::string> {  // NOLINT
     if (x.size() < 5) {
       return {Status::NotOK, "string too short"};
     }
@@ -117,8 +117,8 @@ TEST(StatusOr, String) {
 }
 
 TEST(StatusOr, SharedPtr) {
-  struct A {
-    A(int *x) : x(x) { *x = 233; }
+  struct A {  // NOLINT
+    explicit A(int *x) : x(x) { *x = 233; }
     ~A() { *x = 0; }
 
     int *x;

tests/cppunit/string_reply_test.cc

@@ -31,9 +31,9 @@ class StringReplyTest : public testing::Test {
   }
   static void TearDownTestCase() { values.clear(); }
   static std::vector<std::string> values;
-  virtual void SetUp() {}
 
-  virtual void TearDown() {}
+  void SetUp() override {}
+  void TearDown() override {}
 };
 
 std::vector<std::string> StringReplyTest::values;

tests/cppunit/test_base.h

@@ -27,7 +27,7 @@
 #include "storage/redis_db.h"
 #include "types/redis_hash.h"
 
-class TestBase : public testing::Test {
+class TestBase : public testing::Test {  // NOLINT
  protected:
   explicit TestBase() : config_(new Config()) {
     config_->db_dir = "testdb";

tests/cppunit/types/stream_test.cc

@@ -24,7 +24,7 @@
 #include "time_util.h"
 #include "types/redis_stream.h"
 
-class RedisStreamTest : public TestBase {
+class RedisStreamTest : public TestBase {  // NOLINT
  public:
   void checkStreamEntryValues(const std::vector<std::string> &got, const std::vector<std::string> &expected) {
     EXPECT_EQ(got.size(), expected.size());

x.py

@@ -183,7 +183,7 @@ def clang_tidy(dir: str, jobs: Optional[int], clang_tidy_path: str, run_clang_ti
     if jobs is not None:
         options.append(f'-j{jobs}')
 
-    regexes = ['kvrocks/src/', 'kvrocks2redis/']
+    regexes = ['kvrocks/src/', 'utils/kvrocks2redis/', 'tests/cppunit/']
 
     options.append(f'-header-filter={"|".join(regexes)}')