update source to Ceph Pacific 16.2.2

[ceph.git] / ceph / src / seastar / tests / unit / log_buf_test.cc

diff --git a/ceph/src/seastar/tests/unit/log_buf_test.cc b/ceph/src/seastar/tests/unit/log_buf_test.cc
new file mode 100644 (file)
index 0000000..fbb11a7
--- /dev/null
+++ b/ceph/src/seastar/tests/unit/log_buf_test.cc
@@ -0,0 +1,55 @@
+/*
+ * This file is open source software, licensed to you under the terms
+ * of the Apache License, Version 2.0 (the "License").  See the NOTICE file
+ * distributed with this work for additional information regarding copyright
+ * ownership.  You may not use this file except in compliance with the License.
+ *
+ * You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+/*
+ * Copyright (C) 2020 Cloudius Systems, Ltd.
+ */
+
+#include <seastar/testing/test_case.hh>
+#include <seastar/util/log.hh>
+
+using namespace seastar;
+
+SEASTAR_TEST_CASE(log_buf_realloc) {
+    std::array<char, 128> external_buf;
+
+    const auto external_buf_ptr = reinterpret_cast<uintptr_t>(external_buf.data());
+
+    internal::log_buf b(external_buf.data(), external_buf.size());
+
+    BOOST_REQUIRE_EQUAL(reinterpret_cast<uintptr_t>(b.data()), external_buf_ptr);
+
+    auto it = b.back_insert_begin();
+
+    BOOST_REQUIRE_EQUAL(reinterpret_cast<uintptr_t>(&*it), external_buf_ptr);
+
+    for (auto i = 0; i < 128; ++i) {
+        *it++ = 'a';
+    }
+
+    *it = 'a'; // should trigger realloc
+
+    BOOST_REQUIRE_NE(reinterpret_cast<uintptr_t>(b.data()), reinterpret_cast<uintptr_t>(external_buf.data()));
+    BOOST_REQUIRE_NE(reinterpret_cast<uintptr_t>(&*it), reinterpret_cast<uintptr_t>(external_buf.data() + 128));
+
+    const char* p = b.data();
+    for (auto i = 0; i < 129; ++i) {
+        BOOST_REQUIRE_EQUAL(p[i], 'a');
+    }
+
+    return make_ready_future<>();
+}