Become a technical tester while learning JMeter
Performance testing checklist
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Selenium Basics
JMeter concepts used in this example:
- controllers: if, simple, foreach
- regular expression extractors
- user defined variables
- dynamic http requests
- response assertions
- duration assertions
- executing javascript functions
- bean shell assertions
- reading and writing user variables in a bean shell script
- writing to the jmeter log
- using listeners (view results tree)
Load Test Plan - requirements
Main URL: http://jmeter.apache.org/
step 1. Open the http://jmeter.apache.org/changes.html
step 2. Do a few validations
a. check that version number = Version 2.10
b. check that page load time < 1000ms
step 3. At the bottom of the changes.html page, there are many bug fixes links
step 4. Get the ids of all bug fixes
step 5. Go through all bug fix ids and repeat the following actions:
a. Print the bug order number and bug id in the JMETER log
b. If the bug id < 58000
b1. Open the bug page
b2. Run a few assertions on the bug page
b2.1 Check that ASF Bugzilla exists in the page
b2.2 Check that the bug id exists in the page
Load Test Plan set up
1. Create a Thread Group with the following settings:
action to be taken after a sampler error = continue
number of threads (users) = 10
ramp-up period = 1
loop count = 1
2. Create a Simple Controller inside of the thread group; name it "Practice Tests"
3. Create a Simple Controller inside of Practice Tests; name it "Open Bug pages based on the results of a regular expression"
4. In the last Simple Controller, create the following:
- User Defined Variables config element
* it will include the variables used in the requests and assertions
- Only Once Controller
* it will be used for opening the changes.html page only once
* name it "Open The Changes page"
- ForEach controller
* it will be used for opening the bug id pages
* name it "Open Bug Id pages"
5. Add a View Results Tree listener at the same level with the "Practice Tests" Controller; this will be used for getting results from the load test
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Create the Tess Plan details
1. in the User Defined Variables section, add the following variables:
BugIds
used for getting all bug fix id values from the changes.html page
the variable will store a list of bug id strings
default value = 0
ResultValue
used for getting the individual bug ids from the BugIds variable
default value = 0
NumberOfBugs
used for getting the bug count in the changes.html page
default value = 0
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2. in the "Open The Changes page" controller, create a http request with the following details:
*** this matches requirement 1
Name = Changes Page
Server Name or IP = jmeter.apache.org
Path = /changes.html
3. Add 2 assertions to the "Changes Page" http request
*** this matches requirement 2
a. response assertion
Name = check version number
Response Field To Test = text response
Patterns to test = Version 2.10
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b. duration assertion
Name = check page load time
Duration to assert = 1000 ms
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4. Add a Regular Expression extractor post-processor to the "Changes Page" http request
*** this matches requirement 4
Name = GetBugsIds
Response Field To Check = body
Reference Name = BugIds (defined in User Defined Variables)
Regular Expression = (id=([0-9]{5}))+
Template = $1$
Match = -1 (important if using with foreach controller)
Default Value = nothing
This is how the regular expression will work:
- it will find all id = xxxxx values in the page and add them to the BugIds variable
- the BugIds variable will be a collection of bug ids
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5. Add the following to the "Open Bug Id pages" ForEach controller:
*** this matches requirement 5
- Controller Settings:
input variable prefix = BugIds (defined in User Defined Variables and instanced by the GetBugsIds regular exp extractor)
output variable name = ResultValue (defined in User Defined Variables)
This is how the controller works:
for each iteration, it will assign one bugid value from BugIds to the ResultValue variable.
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- Create a bean shell sampler for displaying the bug count and id in the jmeter log:
*** this matches requirement 5a
Name = Print Bug Number and ID (inline)
String myNumberOfBugs = vars.get("NumberOfBugs");
Double myBugNumber = 0;
myBugNumber = Double.parseDouble(myNumberOfBugs);
myBugNumber = myBugNumber + 1;
vars.put("NumberOfBugs", myBugNumber.toString());
String myResultValue = vars.get("ResultValue");
String myBugId = "";
myBugId = myResultValue.substring(3,8);
log.info("bug number: " + myBugNumber.toString() + " - bug id = " + myBugId);
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- Create an If Controller so only specific bug id pages are opened:
*** this matches requirement 5b
Name = Open Bug Details page if bug id < 58000
Condition = ${__javaScript('${ResultValue}'.substring(3\,8))} < 58000
This condition evaluates if the bug id (xxxxx) is smaller than 5800;
If the condition is true, then the next http request is executed;
If the condition is false, then the next http request is not executed;
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- In the "Open Bug Details page if bug id < 58000" If Controller, create a http request:
*** this matches requirement 5b1
Name = Bug Details Page
Server name or IP = issues.apache.org/bugzilla
Path = /show_bug.cgi?${ResultValue}
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- In the "Bug Details Page" http request, add a bean shell assertion:
*** this matches requirement 5b2
Name = assertions
String myResultValue = vars.get("ResultValue");
String myBugId = "";
myBugId = myResultValue.substring(3,8);
String body= new String(ResponseData);
if(!body.contains("ASF Bugzilla"))
log.warn("- could not find ASF Bugzilla in the page");
else
log.info("- found ASF Bugzilla in the page");
if(!body.contains(myBugId) )
log.warn("- could not find the bug id in the page");
else
log.info("- found the bug id in the page");
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Run the load test
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