关于spring-cloud:SpringCloud升级之路20200x版40-spock-单元测试封装的-WebClient上

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本系列代码地址：https://github.com/JoJoTec/sp…

咱们来测试下后面封装好的 WebClient，这里开始，咱们应用 spock 编写 groovy 单元测试，这种编写进去的单元测试，代码更加简洁，同时更加灵便，咱们在接下来的单元测试代码中就能看进去。

编写基于 spock 的 spring-boot context 测试

咱们退出后面设计的配置，编写测试类：

@SpringBootTest(
        properties = [
                "webclient.configs.testServiceWithCannotConnect.baseUrl=http://testServiceWithCannotConnect",
                "webclient.configs.testServiceWithCannotConnect.serviceName=testServiceWithCannotConnect",
                "webclient.configs.testService.baseUrl=http://testService",
                "webclient.configs.testService.serviceName=testService",
                "webclient.configs.testService.responseTimeout=1s",
                "webclient.configs.testService.retryablePaths[0]=/delay/3",
                "webclient.configs.testService.retryablePaths[1]=/status/4*",
                "spring.cloud.loadbalancer.zone=zone1",
                "resilience4j.retry.configs.default.maxAttempts=3",
                "resilience4j.circuitbreaker.configs.default.failureRateThreshold=50",
                "resilience4j.circuitbreaker.configs.default.slidingWindowType=TIME_BASED",
                "resilience4j.circuitbreaker.configs.default.slidingWindowSize=5",
                // 因为重试是 3 次，为了避免断路器关上影响测试，设置为正好比重试多一次的次数，避免触发
                // 同时咱们在测试的时候也须要手动清空断路器统计
                "resilience4j.circuitbreaker.configs.default.minimumNumberOfCalls=4",
                "resilience4j.circuitbreaker.configs.default.recordExceptions=java.lang.Exception"
        ],
        classes = MockConfig
)
class WebClientUnitTest extends Specification {
    @SpringBootApplication
    static class MockConfig {}}

咱们退出三个服务实例供单元测试调用：

class WebClientUnitTest extends Specification {def zone1Instance1 = new DefaultServiceInstance(instanceId: "instance1", host: "www.httpbin.org", port: 80, metadata: Map.ofEntries(Map.entry("zone", "zone1")))
    def zone1Instance2 = new DefaultServiceInstance(instanceId: "instance2", host: "www.httpbin.org", port: 8081, metadata: Map.ofEntries(Map.entry("zone", "zone1")))
    def zone1Instance3 = new DefaultServiceInstance(instanceId: "instance3", host: "httpbin.org", port: 80, metadata: Map.ofEntries(Map.entry("zone", "zone1")))
}

咱们要动静的指定负载平衡获取服务实例列表的响应，即去 Mock 负载均衡器的 ServiceInstanceListSupplier 并笼罩：

class WebClientUnitTest extends Specification {

    @Autowired
    private Tracer tracer
    @Autowired
    private ServiceInstanceMetrics serviceInstanceMetrics
    
    RoundRobinWithRequestSeparatedPositionLoadBalancer loadBalancerClientFactoryInstance = Spy();
    ServiceInstanceListSupplier serviceInstanceListSupplier = Spy();
    
    // 所有测试的办法执行前会调用的办法
    def setup() {
        // 初始化 loadBalancerClientFactoryInstance 负载均衡器
        loadBalancerClientFactoryInstance.setTracer(tracer)
        loadBalancerClientFactoryInstance.setServiceInstanceMetrics(serviceInstanceMetrics)
        loadBalancerClientFactoryInstance.setServiceInstanceListSupplier(serviceInstanceListSupplier)
    }
}

之后，咱们能够通过上面的 groovy 代码，动静指定微服务返回实例：

// 指定 testService 微服务的 LoadBalancer 为 loadBalancerClientFactoryInstance
loadBalancerClientFactory.getInstance("testService") >> loadBalancerClientFactoryInstance
// 指定 testService 微服务实例列表为 zone1Instance1, zone1Instance3
serviceInstanceListSupplier.get() >> Flux.just(Lists.newArrayList(zone1Instance1, zone1Instance3))

测试断路器异样重试以及断路器级别

咱们须要验证：

  • 对于断路器关上的异样，因为没有申请收回去，所以 须要间接重试其余的实例 。咱们能够设立一个微服务，蕴含两个实例，将 其中一个实例的某个门路断路器关上 ，之后屡次调用这个微服务的这个门路接口，看是否都调用胜利（因为有重试，所以每次调用都会胜利）。同时验证，对于负载均衡器获取服务实例的调用， 多于调用次数（每次重试都会调用负载均衡器获取一个新的实例用于调用）
  • 某个门路断路器关上的时候，其余门路断路器不会关上 。在下面关上一个微服务某个实例的一个门路的断路器之后，咱们调用其余的门路， 无论多少次，都胜利并且调用负载均衡器获取服务实例的次数等于调用次数，代表没有重试，也就是没有断路器异样。

编写代码：

@SpringBootTest(
        properties = [
                "webclient.configs.testServiceWithCannotConnect.baseUrl=http://testServiceWithCannotConnect",
                "webclient.configs.testServiceWithCannotConnect.serviceName=testServiceWithCannotConnect",
                "webclient.configs.testService.baseUrl=http://testService",
                "webclient.configs.testService.serviceName=testService",
                "webclient.configs.testService.responseTimeout=1s",
                "webclient.configs.testService.retryablePaths[0]=/delay/3",
                "webclient.configs.testService.retryablePaths[1]=/status/4*",
                "spring.cloud.loadbalancer.zone=zone1",
                "resilience4j.retry.configs.default.maxAttempts=3",
                "resilience4j.circuitbreaker.configs.default.failureRateThreshold=50",
                "resilience4j.circuitbreaker.configs.default.slidingWindowType=TIME_BASED",
                "resilience4j.circuitbreaker.configs.default.slidingWindowSize=5",
                // 因为重试是 3 次，为了避免断路器关上影响测试，设置为正好比重试多一次的次数，避免触发
                // 同时咱们在测试的时候也须要手动清空断路器统计
                "resilience4j.circuitbreaker.configs.default.minimumNumberOfCalls=4",
                "resilience4j.circuitbreaker.configs.default.recordExceptions=java.lang.Exception"
        ],
        classes = MockConfig
)
class WebClientUnitTest extends Specification {
    @SpringBootApplication
    static class MockConfig { }
    @SpringBean
    private LoadBalancerClientFactory loadBalancerClientFactory = Mock()

    @Autowired
    private CircuitBreakerRegistry circuitBreakerRegistry
    @Autowired
    private Tracer tracer
    @Autowired
    private ServiceInstanceMetrics serviceInstanceMetrics
    @Autowired
    private WebClientNamedContextFactory webClientNamedContextFactory

    // 不同的测试方法的类对象不是同一个对象，会从新生成，保障相互没有影响
    def zone1Instance1 = new DefaultServiceInstance(instanceId: "instance1", host: "www.httpbin.org", port: 80, metadata: Map.ofEntries(Map.entry("zone", "zone1")))
    def zone1Instance2 = new DefaultServiceInstance(instanceId: "instance2", host: "www.httpbin.org", port: 8081, metadata: Map.ofEntries(Map.entry("zone", "zone1")))
    def zone1Instance3 = new DefaultServiceInstance(instanceId: "instance3", host: "httpbin.org", port: 80, metadata: Map.ofEntries(Map.entry("zone", "zone1")))
    RoundRobinWithRequestSeparatedPositionLoadBalancer loadBalancerClientFactoryInstance = Spy();
    ServiceInstanceListSupplier serviceInstanceListSupplier = Spy();

    // 所有测试的办法执行前会调用的办法
    def setup() {
        // 初始化 loadBalancerClientFactoryInstance 负载均衡器
        loadBalancerClientFactoryInstance.setTracer(tracer)
        loadBalancerClientFactoryInstance.setServiceInstanceMetrics(serviceInstanceMetrics)
        loadBalancerClientFactoryInstance.setServiceInstanceListSupplier(serviceInstanceListSupplier)
    }

    def "测试断路器异样重试以及断路器级别"() {
        given: "设置 testService 的实例都是失常实例"
            loadBalancerClientFactory.getInstance("testService") >> loadBalancerClientFactoryInstance
            serviceInstanceListSupplier.get() >> Flux.just(Lists.newArrayList(zone1Instance1, zone1Instance3))
        when: "断路器关上"
            // 革除断路器影响
            circuitBreakerRegistry.getAllCircuitBreakers().forEach({ c -> c.reset() })
            loadBalancerClientFactoryInstance = (RoundRobinWithRequestSeparatedPositionLoadBalancer) loadBalancerClientFactory.getInstance("testService")
            def breaker
            try {breaker = circuitBreakerRegistry.circuitBreaker("httpbin.org:80/anything", "testService")
            } catch (ConfigurationNotFoundException e) {breaker = circuitBreakerRegistry.circuitBreaker("httpbin.org:80/anything")
            }
            // 关上实例 3 的断路器
            breaker.transitionToOpenState()
            // 调用 10 次
            for (i in 0..<10) {Mono<String> stringMono = webClientNamedContextFactory.getWebClient("testService")
                                                                      .get().uri("/anything").retrieve()
                                                                      .bodyToMono(String.class)
                println(stringMono.block())
            }
        then:"调用至多 10 次负载均衡器且没有异样即胜利"
            (10.._) * loadBalancerClientFactoryInstance.getInstanceResponseByRoundRobin(*_)
        when: "调用不同的门路，验证断路器在这个门路上都是敞开"
            // 调用 10 次
            for (i in 0..<10) {Mono<String> stringMono = webClientNamedContextFactory.getWebClient("testService")
                                                                      .get().uri("/status/200").retrieve()
                                                                      .bodyToMono(String.class)
                println(stringMono.block())
            }
        then: "调用必须为正好 10 次代表没有重试，一次胜利，断路器之间互相隔离"
            10 * loadBalancerClientFactoryInstance.getInstanceResponseByRoundRobin(*_)
    }
}

测试针对 connectTimeout 重试

对于连贯超时，咱们须要验证：无论是否能够重试的办法或者门路，都必须重试，因为申请并没有真的收回去。能够这样验证：设置微服务 testServiceWithCannotConnect 一个实例失常，另一个实例会连贯超时，咱们配置了重试 3 次，所以每次申请应该都能胜利，并且随着程序运行，前面的调用不可用的实例还会被断路，照样能够胜利调用。

@SpringBootTest(
        properties = [
                "webclient.configs.testServiceWithCannotConnect.baseUrl=http://testServiceWithCannotConnect",
                "webclient.configs.testServiceWithCannotConnect.serviceName=testServiceWithCannotConnect",
                "webclient.configs.testService.baseUrl=http://testService",
                "webclient.configs.testService.serviceName=testService",
                "webclient.configs.testService.responseTimeout=1s",
                "webclient.configs.testService.retryablePaths[0]=/delay/3",
                "webclient.configs.testService.retryablePaths[1]=/status/4*",
                "spring.cloud.loadbalancer.zone=zone1",
                "resilience4j.retry.configs.default.maxAttempts=3",
                "resilience4j.circuitbreaker.configs.default.failureRateThreshold=50",
                "resilience4j.circuitbreaker.configs.default.slidingWindowType=TIME_BASED",
                "resilience4j.circuitbreaker.configs.default.slidingWindowSize=5",
                // 因为重试是 3 次，为了避免断路器关上影响测试，设置为正好比重试多一次的次数，避免触发
                // 同时咱们在测试的时候也须要手动清空断路器统计
                "resilience4j.circuitbreaker.configs.default.minimumNumberOfCalls=4",
                "resilience4j.circuitbreaker.configs.default.recordExceptions=java.lang.Exception"
        ],
        classes = MockConfig
)
class WebClientUnitTest extends Specification {
    @SpringBootApplication
    static class MockConfig { }
    @SpringBean
    private LoadBalancerClientFactory loadBalancerClientFactory = Mock()

    @Autowired
    private CircuitBreakerRegistry circuitBreakerRegistry
    @Autowired
    private Tracer tracer
    @Autowired
    private ServiceInstanceMetrics serviceInstanceMetrics
    @Autowired
    private WebClientNamedContextFactory webClientNamedContextFactory

    // 不同的测试方法的类对象不是同一个对象，会从新生成，保障相互没有影响
    def zone1Instance1 = new DefaultServiceInstance(instanceId: "instance1", host: "www.httpbin.org", port: 80, metadata: Map.ofEntries(Map.entry("zone", "zone1")))
    def zone1Instance2 = new DefaultServiceInstance(instanceId: "instance2", host: "www.httpbin.org", port: 8081, metadata: Map.ofEntries(Map.entry("zone", "zone1")))
    def zone1Instance3 = new DefaultServiceInstance(instanceId: "instance3", host: "httpbin.org", port: 80, metadata: Map.ofEntries(Map.entry("zone", "zone1")))
    RoundRobinWithRequestSeparatedPositionLoadBalancer loadBalancerClientFactoryInstance = Spy();
    ServiceInstanceListSupplier serviceInstanceListSupplier = Spy();

    // 所有测试的办法执行前会调用的办法
    def setup() {
        // 初始化 loadBalancerClientFactoryInstance 负载均衡器
        loadBalancerClientFactoryInstance.setTracer(tracer)
        loadBalancerClientFactoryInstance.setServiceInstanceMetrics(serviceInstanceMetrics)
        loadBalancerClientFactoryInstance.setServiceInstanceListSupplier(serviceInstanceListSupplier)
    }

    def "测试针对 connectTimeout 重试"() {
        given: "设置微服务 testServiceWithCannotConnect 一个实例失常，另一个实例会连贯超时"
            loadBalancerClientFactory.getInstance("testServiceWithCannotConnect") >> loadBalancerClientFactoryInstance
            serviceInstanceListSupplier.get() >> Flux.just(Lists.newArrayList(zone1Instance1, zone1Instance2))
        when:
            // 因为咱们针对 testService 返回了两个实例，一个能够失常连贯，一个不能够，然而咱们配置了重试 3 次，所以每次申请应该都能胜利，并且随着程序运行，前面的调用不可用的实例还会被断路
            // 这里次要测试针对 connect time out 还有 断路器关上的状况都会重试，并且无论是 GET 办法还是其余的
            Span span = tracer.nextSpan()
            for (i in 0..<10) {Tracer.SpanInScope cleared = tracer.withSpanInScope(span)
                try {
                    // 测试 get 办法（默认 get 办法会重试）Mono<String> stringMono = webClientNamedContextFactory.getWebClient("testServiceWithCannotConnect")
                                                                          .get().uri("/anything").retrieve()
                                                                          .bodyToMono(String.class)
                    println(stringMono.block())
                    // 测试 post 办法（默认 post 办法针对申请曾经收回的不会重试，这里没有发出请求所以还是会重试的）stringMono = webClientNamedContextFactory.getWebClient("testServiceWithCannotConnect")
                                                             .post().uri("/anything").retrieve()
                                                             .bodyToMono(String.class)
                    println(stringMono.block())
                }
                finally {cleared.close()
                }
            }
        then:"调用至多 20 次负载均衡器且没有异样即胜利"
            (20.._) * loadBalancerClientFactoryInstance.getInstanceResponseByRoundRobin(*_)
    }
}

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正文完
spring-cloud
发表至： spring-cloud
2021-11-22
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