metrics/metrics-core/src/test/java/org/apache/servicecomb/metrics/core/TestDefaultRegistryInitializer.java

/*
 * 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
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package org.apache.servicecomb.metrics.core;

import java.util.List;

import org.apache.servicecomb.foundation.metrics.MetricsBootstrapConfig;
import org.apache.servicecomb.foundation.metrics.registry.GlobalRegistry;
import org.junit.Test;

import com.google.common.eventbus.EventBus;
import com.netflix.servo.DefaultMonitorRegistry;
import com.netflix.spectator.api.Registry;

import mockit.Deencapsulation;
import org.junit.jupiter.api.Assertions;

public class TestDefaultRegistryInitializer {
  GlobalRegistry globalRegistry = new GlobalRegistry();

  List<Registry> registries = Deencapsulation.getField(globalRegistry, "registries");

  DefaultRegistryInitializer registryInitializer = new DefaultRegistryInitializer();

  @Test
  @SuppressWarnings("deprecation")
  public void init() {
    registryInitializer.init(globalRegistry, new EventBus(), new MetricsBootstrapConfig());

    Assertions.assertEquals(-10, registryInitializer.getOrder());
    Assertions.assertTrue(globalRegistry.getDefaultRegistry() instanceof com.netflix.spectator.servo.ServoRegistry);
    Assertions.assertEquals(1, registries.size());
    Assertions.assertEquals(0, DefaultMonitorRegistry.getInstance().getRegisteredMonitors().size());

    registryInitializer.destroy();

    Assertions.assertEquals(0, registries.size());
    Assertions.assertEquals(0, DefaultMonitorRegistry.getInstance().getRegisteredMonitors().size());
  }

  @Test
  public void destroy_notInit() {
    // should not throw exception
    registryInitializer.destroy();
  }
}