Load testing using LOCUST
Last Updated :
30 Oct, 2022
Locust is an open-source load-testing tool. Load testing is a type of software testing that is conducted to check the tolerance/behavior of the system under a specific expected load. The target of locust is load-testing websites and checking the number of concurrent users a system can handle. During a locust test, a swarm of locusts will attack the target i.e website. The behavior of each locust is configurable and the swarming process is monitored from a web UI in real time.
Specialty of locust:
- Test scenarios can be written in Python
- Distributed and scalable
- Web-based UI
- Any system can be tested using this tool
Installation: Locust can be installed with pip.
pip install locust
Once the locust is successfully installed, a locust command should be available in your shell. To see more available options:
locust --help
Getting started:
Python3
from locust import HttpUser, TaskSet, task
from locust import ResponseError
import json
class UserBehavior(TaskSet):
def __init__( self , parent):
super (UserBehavior, self ).__init__(parent)
self .token = "
"
self .headers = {}
def on_start( self ):
self .token = self .login()
self .headers = { 'Authorization' : 'Bearer {}' . format ( self .token)}
self .login()
def login( self ):
response = self .client.post( & quot
/ login / "
,
data = { 'username' : 'admin' ,
'password' : 'ZYT5nsg3565!' })
return json.loads(response._content)[ 'access' ]
class WebsiteUser(HttpUser):
task_set = UserBehavior
min_wait = 5000
max_wait = 9000
|
Start locust: To run the above code, create a Python file named locustfile.py, and open the terminal in the directory of the above created file. Then write the following command in the terminal.
locust
Note: By default locust searches for locustfile.py. After the successful execution of the above command, you should open a browser and hit http://127.0.0.1:8089 The Locust UI will appear like below:
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