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deps/oblib/unittest/lib/metrics/test_ob_accumulator.cpp

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+/**
+ * Copyright (c) 2021 OceanBase
+ * OceanBase CE is licensed under Mulan PubL v2.
+ * You can use this software according to the terms and conditions of the Mulan PubL v2.
+ * You may obtain a copy of Mulan PubL v2 at:
+ *          http://license.coscl.org.cn/MulanPubL-2.0
+ * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
+ * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+ * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+ * See the Mulan PubL v2 for more details.
+ */
+
+#include "lib/utility/utility.h"
+#include "lib/ob_define.h"
+#include "lib/utility/ob_print_utils.h"
+#include "lib/metrics/ob_accumulator.h"
+#include <gtest/gtest.h>
+using namespace oceanbase::common;
+
+TEST(ObAccumulator, full_test)
+{
+  ObAccumulator acc;
+  ASSERT_EQ(0, acc.get_value());
+  acc.add(1);
+  ASSERT_EQ(0, acc.get_value());
+  acc.freeze();
+  ASSERT_EQ(1, acc.get_value());
+
+  // After freeze, get_value always returns 1 until the next freeze
+  acc.add(100);
+  ASSERT_EQ(1, acc.get_value());
+  acc.freeze();
+  ASSERT_EQ(100, acc.get_value());
+
+  // After freeze, call add again, the internal temporary value is calculated from 0
+  acc.add(200);
+  acc.add(300);
+  acc.freeze();
+  ASSERT_EQ(500, acc.get_value());
+}
+
+int main(int argc, char** argv)
+{
+  ::testing::InitGoogleTest(&argc, argv);
+  return RUN_ALL_TESTS();
+}