Locust性能自动化—自定义客户端测试

1、定义

Locust以HTTP为主要目标构建。但是，通过编写触发request_success 和request_failure事件的自定义客户端，可以轻松扩展对任何基于请求/响应的系统进行负载测试。

2、客户端代码展示

我们使用User类XmlRpcUser的示例，来看看XmlRpcUser如何发送请求。

import time
from xmlrpc.client import ServerProxy, Fault

from locust import User, task, between


class XmlRpcClient(ServerProxy):
    """
    Simple, sample XML RPC client implementation that wraps xmlrpclib.ServerProxy and
    fires locust events on request_success and request_failure, so that all requests
    gets tracked in locust's statistics.
    """

    _locust_environment = None

    def __getattr__(self, name):
        func = ServerProxy.__getattr__(self, name)

        def wrapper(*args, **kwargs):
            start_time = time.time()
            try:
                result = func(*args, **kwargs)
            except Fault as e:
                total_time = int((time.time() - start_time) * 1000)
                self._locust_environment.events.request_failure.fire(
                    request_type="xmlrpc", name=name, response_time=total_time, exception=e
                )
            else:
                total_time = int((time.time() - start_time) * 1000)
                self._locust_environment.events.request_success.fire(
                    request_type="xmlrpc", name=name, response_time=total_time, response_length=0
                )
                # In this example, I've hardcoded response_length=0. If we would want the response length to be
                # reported correctly in the statistics, we would probably need to hook in at a lower level

        return wrapper


class XmlRpcUser(User):
    """
    This is the abstract User class which should be subclassed. It provides an XML-RPC client
    that can be used to make XML-RPC requests that will be tracked in Locust's statistics.
    """

    abstract = True

    def __init__(self, *args, **kwargs):
        super(XmlRpcUser, self).__init__(*args, **kwargs)
        self.client = XmlRpcClient(self.host)
        self.client._locust_environment = self.environment


class ApiUser(XmlRpcUser):
    host = "http://127.0.0.1:8877/"
    wait_time = between(0.1, 1)

    @task(10)
    def get_time(self):
        self.client.get_time()

    @task(5)
    def get_random_number(self):
        self.client.get_random_number(0, 100)

在这段代码中：

• 你可以认识到ApiUser的类，这是一个普通的类，只是声明了几个任务；

• ApiUser继承自XmlRpcUser ，这个可以在ApiUser类上看到；

• abstract = True，则标记为Locust不会尝试从该类创建模拟用户（仅扩展该类的类）。

• XmlRpcUser在客户端属性下提供XmlRpcClient的实例。

3、服务端代码展示

这是XML-RPC服务器的实现，该服务器可用作客户端代码的服务器。

代码展示：

import time
from xmlrpc.server import SimpleXMLRPCServer


def get_time():
    time.sleep(random.random())
    return time.time()


def get_random_number(low, high):
    time.sleep(random.random())
    return random.randint(low, high)


server = SimpleXMLRPCServer(("localhost", 8877))
print("Listening on port 8877...")
server.register_function(get_time, "get_time")
server.register_function(get_random_number, "get_random_number")
server.serve_forever()

①、《Locust性能自动化—初识性能测试》

带你认识性能测试，了解性能测试需要关注哪些指标。

②、《Locust性能自动化-Locust介绍》

带你认识 locust，从此不再仅限于 Loadrunner、Jmeter性能功能。

③、《Locust性能自动化—代码实战》

让你了解locust的内涵，自己也可以动手写性能测试脚本。

④、《Locust性能自动化—如何提高Locust性能》

让你提高性能，遨游性能的海洋。

原文链接：https://www.cxybb.com/article/wuyoudeyuer/108929620