src/test/cpp/ut/base/HistogramTest.cpp

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); 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.
 */
#include "Histogram.h"
#include <gtest/gtest.h>

ROCKETMQ_NAMESPACE_BEGIN

class HistogramTest : public testing::Test {
public:
  HistogramTest() : histogram_("Test", 3) {
  }

  void SetUp() override {
    histogram_.labels().emplace_back("Foo: ");
    histogram_.labels().emplace_back("Bar: ");
    histogram_.labels().emplace_back("Baz: ");
  }

protected:
  Histogram histogram_;
};

TEST_F(HistogramTest, testHistogram_no_count) {

  std::string result;
  histogram_.reportAndReset(result);

  std::string expect("Test:Foo: 0, Bar: 0, Baz: 0");
  EXPECT_STREQ(result.c_str(), expect.c_str());
}

TEST_F(HistogramTest, testHistogram) {
  histogram_.countIn(0);
  histogram_.countIn(-1);
  histogram_.countIn(4);
  histogram_.countIn(2);

  std::string result;
  histogram_.reportAndReset(result);

  std::string expect("Test:Foo: 1, Bar: 0, Baz: 2");
  EXPECT_STREQ(result.c_str(), expect.c_str());
}

ROCKETMQ_NAMESPACE_END