UT: improve test coverage for load balancer unit test (#325)
* improve test coverage for load-balancer * modify CHANGELOG.md Co-authored-by: lapplelei <lapplelei@tencent.com>pull/328/head
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2 years ago
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/*
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* Tencent is pleased to support the open source community by making Spring Cloud Tencent available.
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*
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* Copyright (C) 2019 THL A29 Limited, a Tencent company. All rights reserved.
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*
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* Licensed under the BSD 3-Clause License (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://opensource.org/licenses/BSD-3-Clause
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*
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* Unless required by applicable law or agreed to in writing, software distributed
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* under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
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* CONDITIONS OF ANY KIND, either express or implied. See the License for the
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* specific language governing permissions and limitations under the License.
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*/
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// CHECKSTYLE:OFF
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package com.tencent.cloud.polaris.loadbalancer;
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import java.util.List;
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import java.util.stream.Collectors;
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import java.util.stream.Stream;
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import com.netflix.client.config.DefaultClientConfigImpl;
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import com.netflix.client.config.IClientConfig;
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import com.netflix.loadbalancer.DummyPing;
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import com.netflix.loadbalancer.Server;
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import com.netflix.loadbalancer.ServerList;
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import com.tencent.cloud.common.util.ApplicationContextAwareUtils;
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import com.tencent.cloud.polaris.loadbalancer.config.PolarisLoadBalancerProperties;
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import com.tencent.polaris.api.core.ConsumerAPI;
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import com.tencent.polaris.api.pojo.DefaultInstance;
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import com.tencent.polaris.api.pojo.DefaultServiceInstances;
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import com.tencent.polaris.api.pojo.Instance;
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import com.tencent.polaris.api.pojo.ServiceInstances;
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import com.tencent.polaris.api.pojo.ServiceKey;
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import com.tencent.polaris.api.rpc.InstancesResponse;
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import com.tencent.polaris.router.api.core.RouterAPI;
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import com.tencent.polaris.router.api.rpc.ProcessLoadBalanceResponse;
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import org.junit.Assert;
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import org.junit.Test;
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import org.junit.runner.RunWith;
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import org.mockito.Mock;
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import org.mockito.MockedStatic;
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import org.mockito.Mockito;
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import org.mockito.junit.MockitoJUnitRunner;
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import org.springframework.cloud.netflix.ribbon.StaticServerList;
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import static org.mockito.ArgumentMatchers.any;
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import static org.mockito.Mockito.when;
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/**
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* Test for {@link PolarisLoadBalancer}.
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*
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* @author lapple.lei 2022-06-28
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*/
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@RunWith(MockitoJUnitRunner.class)
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public class PolarisLoadBalancerTest {
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private static final String CLIENT_NAME = "polaris-test-server";
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private static final String NS = "testNamespace";
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private static final String[] HOST_LIST = new String[] {
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"127.0.0.1",
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"127.0.0.2",
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"127.0.0.3",
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"127.0.0.4",
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"127.0.0.5",
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};
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@Mock
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private RouterAPI routerAPI;
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@Mock
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private ConsumerAPI consumerAPI;
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@Test
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public void testPolarisLoadBalancer() {
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//mock consumerAPI
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when(consumerAPI.getHealthyInstancesInstance(any())).thenReturn(this.assembleInstanceResp());
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//mock routerAPI for rule
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when(routerAPI.processLoadBalance(any())).thenReturn(assembleProcessLoadBalanceResp());
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PolarisWeightedRule rule = new PolarisWeightedRule(routerAPI);
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// clientConfig
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IClientConfig config = new DefaultClientConfigImpl();
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config.loadProperties(CLIENT_NAME);
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//mock for MetadataContext
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try (MockedStatic<ApplicationContextAwareUtils> mockedCtxUtils = Mockito
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.mockStatic(ApplicationContextAwareUtils.class)) {
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mockedCtxUtils.when(() -> ApplicationContextAwareUtils.getProperties("spring.cloud.polaris.namespace"))
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.thenReturn(NS);
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mockedCtxUtils.when(() -> ApplicationContextAwareUtils.getProperties("spring.cloud.polaris.service"))
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.thenReturn("TestServer");
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PolarisLoadBalancerProperties properties = new PolarisLoadBalancerProperties();
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ServerList<Server> emptyServerList = new StaticServerList<>();
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PolarisLoadBalancer balancer = new PolarisLoadBalancer(config, rule, new DummyPing(), emptyServerList,
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consumerAPI, properties);
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String host = balancer.choose(null);
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System.out.println(host);
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Assert.assertNotNull(host);
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Assert.assertEquals("127.0.0.1:8080", host);
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}
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}
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@Test
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public void testExtendDiscoveryServiceInstance() {
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//mock routerAPI for rule
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when(routerAPI.processLoadBalance(any())).thenReturn(assembleProcessLoadBalanceResp());
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PolarisWeightedRule rule = new PolarisWeightedRule(routerAPI);
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// clientConfig
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IClientConfig config = new DefaultClientConfigImpl();
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config.loadProperties(CLIENT_NAME);
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//mock for MetadataContext
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try (MockedStatic<ApplicationContextAwareUtils> mockedCtxUtils = Mockito
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.mockStatic(ApplicationContextAwareUtils.class)) {
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mockedCtxUtils.when(() -> ApplicationContextAwareUtils.getProperties("spring.cloud.polaris.namespace"))
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.thenReturn(NS);
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mockedCtxUtils.when(() -> ApplicationContextAwareUtils.getProperties("spring.cloud.polaris.service"))
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.thenReturn("TestServer");
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PolarisLoadBalancerProperties properties = new PolarisLoadBalancerProperties();
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properties.setDiscoveryType("TEST");
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ServerList<Server> staticServerList = assembleServerList();
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PolarisLoadBalancer balancer = new PolarisLoadBalancer(config, rule, new DummyPing(), staticServerList,
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consumerAPI, properties);
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String host = balancer.choose(null);
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System.out.println(host);
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}
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}
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private ServerList<Server> assembleServerList() {
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return new StaticServerList<>(Stream.of(HOST_LIST).map(this::convertServer).toArray(Server[]::new));
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}
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private ProcessLoadBalanceResponse assembleProcessLoadBalanceResp() {
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ServiceInstances serviceInstances = assembleServiceInstances();
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return new ProcessLoadBalanceResponse(serviceInstances.getInstances().get(0));
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}
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private InstancesResponse assembleInstanceResp() {
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return new InstancesResponse(assembleServiceInstances());
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}
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private ServiceInstances assembleServiceInstances() {
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ServiceKey serviceKey = new ServiceKey(NS, CLIENT_NAME);
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List<Instance> instances = Stream.of(HOST_LIST).map(this::convertInstance).collect(Collectors.toList());
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return new DefaultServiceInstances(serviceKey, instances);
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}
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private Instance convertInstance(String host) {
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DefaultInstance instance = new DefaultInstance();
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instance.setHost(host);
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instance.setPort(8080);
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return instance;
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}
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private Server convertServer(String host) {
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return new Server("http", host, 8080);
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}
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}
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