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SpringCloud升级之路2020.0.x版-40. spock 单元测试封装的 WebClient(下)

2021-11-23 09:36 85 查看 https://www.cnblogs.com/zhxdic

本系列代码地址:https://github.com/JoJoTec/spring-cloud-parent

我们继续上一节,继续使用 spock 测试我们自己封装的 WebClient

测试针对 readTimeout 重试

针对响应超时,我们需要验证重试仅针对可以重试的方法(包括 GET 方法以及配置的可重试方法),针对不可重试的方法没有重试。我们可以通过 spock 单元测试中,检查对于负载均衡器获取实例方法的调用次数看出来是否有重试

我们通过 httpbin.org 的 '/delay/秒' 实现 readTimeout,分别验证:

  • 测试 GET 延迟 2 秒返回,超过读取超时,这时候会重试
  • 测试 POST 延迟 3 秒返回,超过读取超时,同时路径在重试路径中,这样也是会重试的
  • 测试 POST 延迟 2 秒返回,超过读取超时,同时路径在重试路径中,这样不会重试

代码如下:

@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,为了防止断路器打开影响测试,设置为正好比重试多一次的次数,防止触发
//同时我们在测试的时候也需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,会重新生成,保证互相没有影响
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();

//所有测试的方法执行前会调用的方法
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 readTimeout 重试"() {
given: "设置 testService 的实例都是正常实例"
loadBalancerClientFactory.getInstance("testService") >> loadBalancerClientFactoryInstance
serviceInstanceListSupplier.get() >> Flux.just(Lists.newArrayList(zone1Instance1, zone1Instance3))
when: "测试 GET 延迟 2 秒返回,超过读取超时"
//清除断路器影响
circuitBreakerRegistry.getAllCircuitBreakers().forEach({ c -> c.reset() })
try {
webClientNamedContextFactory.getWebClient("testService")
.get().uri("/delay/2").retrieve()
.bodyToMono(String.class).block();
} catch (WebClientRequestException e) {
if (e.getCause() in  ReadTimeoutException) {
//读取超时忽略
} else {
throw e;
}
}
then: "每次都会超时所以会重试,根据配置一共有 3 次"
3 * loadBalancerClientFactoryInstance.getInstanceResponseByRoundRobin(*_)
when: "测试 POST 延迟 3 秒返回,超过读取超时,同时路径在重试路径中"
//清除断路器影响
circuitBreakerRegistry.getAllCircuitBreakers().forEach({ c -> c.reset() })
try {
webClientNamedContextFactory.getWebClient("testService")
.post().uri("/delay/3").retrieve()
.bodyToMono(String.class).block();
} catch (WebClientRequestException e) {
if (e.getCause() in  ReadTimeoutException) {
//读取超时忽略
} else {
throw e;
}
}
then: "每次都会超时所以会重试,根据配置一共有 3 次"
3 * loadBalancerClientFactoryInstance.getInstanceResponseByRoundRobin(*_)
when: "测试 POST 延迟 2 秒返回,超过读取超时,这个不能重试"
//清除断路器影响
circuitBreakerRegistry.getAllCircuitBreakers().forEach({ c -> c.reset() })
try {
webClientNamedContextFactory.getWebClient("testService")
.post().uri("/delay/2").retrieve()
.bodyToMono(String.class).block();
} catch (WebClientRequestException e) {
if (e.getCause() in  ReadTimeoutException) {
//读取超时忽略
} else {
throw e;
}
}
then: "没有重试,只有一次调用"
1 * loadBalancerClientFactoryInstance.getInstanceResponseByRoundRobin(*_)
}
}

测试非 2xx 响应码返回的重试

对于非 2xx 的响应码,代表请求失败,我们需要测试:

  • 测试 GET 返回 500,会有重试
  • 测试 POST 返回 500,没有重试
  • 测试 POST 返回 400,这个请求路径在重试路径中,会有重试
@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,为了防止断路器打开影响测试,设置为正好比重试多一次的次数,防止触发
//同时我们在测试的时候也需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,会重新生成,保证互相没有影响
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();

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

def "测试非 200 响应码返回" () {
given: "设置 testService 的实例都是正常实例"
loadBalancerClientFactory.getInstance("testService") >> loadBalancerClientFactoryInstance
serviceInstanceListSupplier.get() >> Flux.just(Lists.newArrayList(zone1Instance1, zone1Instance3))
when: "测试 GET 返回 500"
//清除断路器影响
circuitBreakerRegistry.getAllCircuitBreakers().forEach({ c -> c.reset() })
try {
webClientNamedContextFactory.getWebClient("testService")
.get().uri("/status/500").retrieve()
.bodyToMono(String.class).block();
} catch (WebClientResponseException e) {
if (e.getStatusCode().is5xxServerError()) {
//5xx忽略
} else {
throw e;
}
}
then: "每次都没有返回 2xx 所以会重试,根据配置一共有 3 次"
3 * loadBalancerClientFactoryInstance.getInstanceResponseByRoundRobin(*_)
when: "测试 POST 返回 500"
//清除断路器影响
circuitBreakerRegistry.getAllCircuitBreakers().forEach({ c -> c.reset() })
try {
webClientNamedContextFactory.getWebClient("testService")
.post().uri("/status/500").retrieve()
.bodyToMono(String.class).block();
} catch (WebClientResponseException e) {
if (e.getStatusCode().is5xxServerError()) {
//5xx忽略
} else {
throw e;
}
}
then: "POST 默认不重试,所以只会调用一次"
1 * loadBalancerClientFactoryInstance.getInstanceResponseByRoundRobin(*_)
when: "测试 POST 返回 400,这个请求路径在重试路径中"
//清除断路器影响
circuitBreakerRegistry.getAllCircuitBreakers().forEach({ c -> c.reset() })
try {
webClientNamedContextFactory.getWebClient("testService")
.post().uri("/status/400").retrieve()
.bodyToMono(String.class).block();
} catch (WebClientResponseException e) {
if (e.getStatusCode().is4xxClientError()) {
//4xx忽略
} else {
throw e;
}
}
then: "路径在重试路径中,所以会重试"
3 * loadBalancerClientFactoryInstance.getInstanceResponseByRoundRobin(*_)
}
}

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