fix UT warning on clang

test/brpc_hpack_unittest.cpp

@@ -23,7 +23,7 @@ TEST_F(HPackTest, header_with_indexing) {
     options.index_policy = brpc::HPACK_INDEX_HEADER;
     butil::IOBufAppender buf;
     p1.Encode(&buf, h, options);
-    const size_t nwrite = buf.buf().size();
+    const ssize_t nwrite = buf.buf().size();
     LOG(INFO) << butil::ToPrintable(buf.buf());
     uint8_t expected[] = {
         0x40, 0x0a, 0x63, 0x75, 0x73, 0x74, 0x6f, 0x6d, 0x2d, 0x6b, 0x65, 0x79,
@@ -53,7 +53,7 @@ TEST_F(HPackTest, header_without_indexing) {
     options.index_policy = brpc::HPACK_NOT_INDEX_HEADER;
     butil::IOBufAppender buf;
     p1.Encode(&buf, h, options);
-    const size_t nwrite = buf.buf().size();
+    const ssize_t nwrite = buf.buf().size();
     LOG(INFO) << butil::ToPrintable(buf.buf());
     uint8_t expected[] = {
         0x04, 0x0c, 0x2f, 0x73, 0x61, 0x6d, 0x70, 0x6c, 0x65, 0x2f, 0x70, 0x61,
@@ -83,7 +83,7 @@ TEST_F(HPackTest, header_never_indexed) {
     options.index_policy = brpc::HPACK_NEVER_INDEX_HEADER;
     butil::IOBufAppender buf;
     p1.Encode(&buf, h, options);
-    const size_t nwrite = buf.buf().size();
+    const ssize_t nwrite = buf.buf().size();
     LOG(INFO) << butil::ToPrintable(buf.buf());
     uint8_t expected[] = {
         0x10, 0x08, 0x70, 0x61, 0x73, 0x73, 0x77, 0x6f, 0x72, 0x64,

test/brpc_http_rpc_protocol_unittest.cpp

@@ -493,7 +493,7 @@ public:
         if (_done_place == DONE_BEFORE_CREATE_PA) {
             done_guard.reset(NULL);
         }
-        ASSERT_GT(PA_DATA_LEN, 8);  // long enough to hold a 64-bit decimal.
+        ASSERT_GT(PA_DATA_LEN, 8u);  // long enough to hold a 64-bit decimal.
         char buf[PA_DATA_LEN];
         for (size_t c = 0; c < _nrep;) {
             CopyPAPrefixedWithSeqNo(buf, c);

test/brpc_load_balancer_unittest.cpp

@@ -596,7 +596,7 @@ TEST_F(LoadBalancerTest, weighted_round_robin) {
     // There are 3 valid servers with weight 3, 2 and 7 respectively.
     // We run SelectServer for 12 times. The result number of each server seleted should be 
     // consistent with weight configured.
-    std::map<butil::EndPoint, size_t> select_result;
+    std::map<butil::EndPoint, int> select_result;
     brpc::SocketUniquePtr ptr;
     brpc::LoadBalancer::SelectIn in = { 0, false, false, 0u, NULL };
     brpc::LoadBalancer::SelectOut out(&ptr);
@@ -613,7 +613,7 @@ TEST_F(LoadBalancerTest, weighted_round_robin) {
     } 
     std::cout << std::endl;   
     // Check whether slected result is consistent with expected.
-    EXPECT_EQ(3, select_result.size());
+    EXPECT_EQ((size_t)3, select_result.size());
     for (const auto& result : select_result) {
         std::cout << result.first << " result=" << result.second 
                   << " configured=" << configed_weight[result.first] << std::endl;

test/brpc_uri_unittest.cpp

@@ -38,7 +38,7 @@ TEST(URITest, only_host) {
     ASSERT_EQ("", uri.path());
     ASSERT_EQ("", uri.user_info());
     ASSERT_EQ("", uri.fragment());
-    ASSERT_EQ(2, uri.QueryCount());
+    ASSERT_EQ(2u, uri.QueryCount());
     ASSERT_TRUE(uri.GetQuery("wd"));
     ASSERT_EQ(*uri.GetQuery("wd"), "uri2");
     ASSERT_TRUE(uri.GetQuery("nonkey"));

test/iobuf_unittest.cpp

@@ -290,7 +290,7 @@ TEST_F(IOBufTest, reserve) {
     ASSERT_EQ((size_t)16, b.size());
 
     // pop/append sth. from back-side and assign again.
-    ASSERT_EQ(5, b.pop_back(5));
+    ASSERT_EQ((size_t)5, b.pop_back(5));
     ASSERT_EQ("prefihello ", b.to_string());
     b.append("blahblahfoobar");
     ASSERT_EQ(0, b.unsafe_assign(a1, "goodorbad")); // `x' will not be copied
@@ -1312,7 +1312,7 @@ TEST_F(IOBufTest, append_from_fd_with_offset) {
     ASSERT_EQ((ssize_t)sizeof(dummy), buf.cut_into_file_descriptor(fd));
     for (size_t i = 0; i < sizeof(dummy); ++i) {
         butil::IOPortal b0;
-        ASSERT_EQ(sizeof(dummy) - i, b0.pappend_from_file_descriptor(fd, i, sizeof(dummy))) << berror();
+        ASSERT_EQ(sizeof(dummy) - i, (size_t)b0.pappend_from_file_descriptor(fd, i, sizeof(dummy))) << berror();
         char tmp[sizeof(dummy)];
         ASSERT_EQ(0, memcmp(dummy + i, b0.fetch(tmp, b0.length()), b0.length()));
     }

test/temp_file_unittest.cpp

@@ -139,7 +139,7 @@ TEST_F(TempFileTest, save_binary_twice)
     fp = fopen(tmp.fname(), "r");
     ASSERT_NE((void*)0, fp);
     bzero(&act_data, sizeof(act_data));
-    ASSERT_EQ(1, fread(&act_data, sizeof(act_data), 1, fp));
+    ASSERT_EQ((size_t)1, fread(&act_data, sizeof(act_data), 1, fp));
     fclose(fp);
     
     ASSERT_EQ(0, memcmp(&data2, &act_data, sizeof(data2)));