Locust性能测试-API调用详解4-继续TaskSet细节

TimTest 2021-02-18

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在TaskSet中也可以设置on_start, on_stop方法，目的是为了在执行TaskSet之前和之后需要做的操作。需要了解的知识点有两个：

父TaskSet on_start on_stop一般会各自执行1次。其中on_start会在场景开始时执行1次，on_stop会在场景执行结束后执行1次。
子TaskSet on_start on_stop执行次数和此TaskSet被触发次数一致。比如TaskSet触发10次，那么on_start/on_stop会各被执行10次。

具体可以参考以下代码：

from locust import task,between,TaskSet, User


class TaskSetP(TaskSet):


    def on_start(self):
        print("This is TaskSetP starting process.")


    def on_stop(self):
        print("This is TaskSetP stopping process.")


    @task(2)
    class TaskSetC1(TaskSet):


        def on_start(self):
            print("This is TaskSetC1 starting process.")


        def on_stop(self):
            print("this is TaskSetC1 stopping process.")


        @task(2)
        def TaskC_1(self):
            print("This is TaskC_1")


        @task(1)
        def TaskC_2(self):
            print("This is TaskC_2")
            self.interrupt()


    @task(1)
    def logout(self):
        print("This is logout task")


class MyUser(User):
    wait_time = between(2,3)
    tasks = [TaskSetP]
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locust file执行结果如下，可以发现：

TaskSetP starting process被执行了1次，stopping process也被执行了1次（是手动关闭场景执行触发的）。
TaskSetC1 starting/stopping process 执行次数和被选择执行的次数一致。

[2021-02-18 09:25:22,339] jasondeMacBook-Pro.local/INFO/locust.runners: All users hatched: MyUser: 1 (0 already running)
This is TaskSetP starting process.
This is TaskSetC1 starting process.
This is TaskC_2
this is TaskSetC1 stopping process.
This is TaskSetC1 starting process.
This is TaskC_2
this is TaskSetC1 stopping process.
This is TaskSetC1 starting process.
This is TaskC_1
This is TaskC_1
This is TaskC_2
this is TaskSetC1 stopping process.
This is logout task
This is TaskSetC1 starting process.
This is TaskC_2
this is TaskSetC1 stopping process.
This is TaskSetC1 starting process.
This is TaskC_1
This is TaskC_1
This is TaskC_2
this is TaskSetC1 stopping process.
This is logout task
This is logout task
This is logout task
This is TaskSetC1 starting process.
This is TaskC_1
This is TaskC_1
This is TaskC_1
This is TaskC_1
This is TaskC_2
this is TaskSetC1 stopping process.
This is logout task
This is TaskSetC1 starting process.
This is TaskC_2
this is TaskSetC1 stopping process.
This is logout task
This is logout task
This is TaskSetC1 starting process.
This is TaskC_2
this is TaskSetC1 stopping process.
This is TaskSetC1 starting process.
This is TaskC_1
This is TaskC_1
This is TaskC_1
This is TaskC_1
This is TaskC_2
this is TaskSetC1 stopping process.
This is TaskSetC1 starting process.
This is TaskC_1
This is TaskC_1
This is TaskC_2
this is TaskSetC1 stopping process.
This is TaskSetC1 starting process.
This is TaskC_1
This is TaskC_2
this is TaskSetC1 stopping process.
This is logout task
This is TaskSetC1 starting process.
This is TaskC_2
this is TaskSetC1 stopping process.
This is TaskSetC1 starting process.
This is TaskC_1
This is TaskC_1
This is TaskC_2
this is TaskSetC1 stopping process.
This is logout task
This is logout task
This is logout task
^CKeyboardInterrupt
2021-02-18T01:26:31Z
[2021-02-18 09:26:31,790] jasondeMacBook-Pro.local/INFO/locust.main: Running teardowns...
[2021-02-18 09:26:31,790] jasondeMacBook-Pro.local/INFO/locust.main: Shutting down (exit code 0), bye.
[2021-02-18 09:26:31,790] jasondeMacBook-Pro.local/INFO/locust.main: Cleaning up runner...
This is TaskSetP stopping process.
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Locust性能测试-API调用详解4-继续TaskSet细节

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