I am building a load/stress test for some webpages. I have a HTTP Request Default set up that has the base server name. I would like to use a Random Controller and HTTP Request to check all pages at random, but I do not want to have to make 150 HTTP Request that each hold a unique path. I would rather have one HTTP request that pulls a path at random from a file.
Is what I am describing possible? Can anyone point me in the right direction?
In fact it's possible. Everything is possible. In case of JMeter you'll need to do some scripting.
Given the following test plan structure:
setUp Thread Group
Beanshell Sampler
import org.apache.commons.io.FileUtils;
List lines = FileUtils.readLines(new File("/path/to/your/file"));
bsh.shared.lines = lines;
Thread Group
HTTP Request Sampler, Path: ${randomline}
Beanshell PreProcessor
List lines = bsh.shared.lines;
Random rnd = new Random();
vars.put("randomline", lines.get(rnd.nextInt(lines.size())));
It will be possible to use random URL from file as HTTP Request Path.
Explanation:
setUp Thread Group - special Thread Group type which is executed before any other Thread Group. The idea is to read file only once.
Beanshell Sampler - uses FileUtils library to read all the lines into lines array and bsh.shared namespace so the array will be accessible globally to all Thread Groups
Beanshell PreProcessor - uses Random class to generate random line number, obtains random value from the lines array and stores the value into randomline variable via JMeterVariables class.
Refer generated random line as ${randomline} where required.
See How to Use BeanShell: JMeter's Favorite Built-in Component guide for more information on Beanshell scripting in JMeter and a kind of Beanshell cookbook.
I re-worded my searching and have found that this is not possible. I think I am going to take the advice from another forum and randomize my file to achieve this. Seems to be the simplest solution.
Related
I have a SOAP request. I need to use jmeter to test multiple requests for same method, each time passing one missing element.
How can I achieve this ?
I tried writing the tags into csv using CSV data config , but I am unable to enter empty values in the csv, each time for a different tag in each csv row.
Any help would be appreciated. Thank you.
The CSV Data Set Config will read the value from next line only on the next iteration of the thread (virtual user), you cannot read more than one line within the bounds of a single iteration. You might want to take a look at __CSVRead() function where it's you who decides when to proceed to the next line.
If the __CSVRead() function isn't applicable for your use case be aware that you can build a request body, i.e. XML from CSV file using JSR223 PreProcessor and Groovy language.
See Creating XML chapter of Groovy documentation for more details.
I have to send JSON requests based on the CSV test data. Suppose there are 90 records - which are basically the request bodies. I put the Thread in a loop to keep sending the request until the last one in the CSV.
Every time I get the response, I need to append them into a single CSV file. Now, since Jmeter Listener does not consolidate all the responses into CSV (I do not want it in xml), I want to know if I can write a Java snippet in BeanShell, capture all responses and write them to a CSV file.
You can use JSR223 Sampler with File.append adding text with , to append to CSV file
This will append to the end of the file.
File file = new File("out.txt")
file.append("hello\n")
If you want the "program"
Add JSR223 Listener to your Test Plan (since JMeter 3.1 it is recommended to use JSR223 Test Elements for scripting)
Put the following code into "Script" area
new File('myfile.csv') << prev.getResponseDataAsString() << System.getProperty('line.separator')
where prev stands for previous SampleResult class instance. Check out Top 8 JMeter Java Classes You Should Be Using with Groovy article for more information on JMeter API shorthands available for the JSR223 Test Elements.
A better option would be saving a response into a JMeter Variable using i.e. Regular Expression Extractor and writing it to a file via sample_variables property
on a JMeter test plan, I have too many HTTP requests. One of these creates a new session every time when clicking the create button.
How do I store that session_id in a CSV file for further operation?
Given you have already extracted this session_id using the relevant JMeter PostProcessor you can save its value into a file using JSR223 PostProcessor and the code like:
new File('/path/to/your/file.csv') << vars.get('session_id') << System.getProperty('line.separator')
Make sure you select groovy in the "Language" dropdown and tick Cache compiled script if available box.
If ${session_id} variable exists - JMeter will store its value(s) in the file provided.
There are a few ways to do it. The most useful is RegExp post processor.
It could be found here as it is shown in the following image.
Place it under Request that returns needed data in response.
The RegExp catches groups and stores them under different variable names, based on Name of Create Variable. The values could be searched in different areas of Response, as it is demonstrated in the image, we can search in headers, redirected pages, main bodies and so on. The Stored variable could be re-used in other HTTP Requests or processors (Post and Pre) through ${VariableName} (e.g. ${JSESSION_ID})
Reference name
RegExp itself
Capturing group
Match number
A default value to set if RegExp didn't work
DEBUG:
If a value is not found, the DEBUG in cooperation with Tree Results Viewer can help. Here they are :
The general script structure might look like :
Add BeanShell PostProcessor. Copy, paste the below code (with your modifications for path and var).
var = vars.get("your_variable_name");
FileWriter fstream = new FileWriter("/your/desired/path/results.csv", true);
BufferedWriter out = new BufferedWriter(fstream);
out.write(var);
out.write(System.getProperty("line.separator"));
out.close();
fstream.close();
I want to pass test data from one csv file to multiple http requests like first row should take by 1st http sample and second row should take by 2nd http sample.Please help how to use this in jmeter.
You can follow these:
Add your CSV Dataset config in test plan level
Define Thread group (enough thread, ramp-up, duration)
Under thread group, add your requests or samples.
Put your CSV file in the JMeter bin directory.
Use those variables (defined in CSV Dataset) in your requests.
Hint:
CSV Data set Config:
Http Request sampler:
If you need to read a specific (arbitrary) line from a file with each Sampler you can use i.e. __groovy() function for this like:
${__groovy(new File('/path/to/your/file').readLines().get(0),)} - read 1st string
${__groovy(new File('/path/to/your/file').readLines().get(1),)} - read 2nd string
${__groovy(new File('/path/to/your/file').readLines().get(2),)} - read 3rd string
etc.
Demo:
File.readLines() method is a Groovy JDK enhancement to provide some "syntactic sugar" on top of "normal" Java to make developers lives easier.
See Groovy is the New Black article to get started with using Groovy scripting in JMeter tests.
I have to give dynamic values to url which takes number of users and their age , which can be selected though web page. but I want to give it in Jmeter using BeanShell PostProcessor.
Help me in this,since I'm new to Jmeter.
This is the path:
/destinations/packages?airports%5B%5D=LGW&units%5B%5D=000577%3ADESTINATION&when=29-05-2016&until=&flexibility=true&flexibleDays=3&noOfAdults=2&noOfSeniors=0&noOfChildren=1&childrenAge=3&duration=7114&first=0&searchType=search&searchRequestType=ins&sp=true&multiSelect=true
from what I've got looks like you can use CSV Data Set Config.
Create .txt file with the data you want to feed your test with;
Place the above .txt file to the folder where your .jmx file lies;
In your Test plan: Under your request sampler - place CSV Data set Config;
Then if you need to use your dynamic values within one threadgroup => refer these data as ${quanity}, ${age} in you url.
If you need to pass these values across the threadgroups => add BeanShell Assertion
Then (in the other Tread group) refer those as ${__property(_quantity)},${__property(_age)}.
Hope, it helps.
First of all you need Beanshell PreProcessor, not Beanshell PostProcessor.
All this parameters are basically name/value pairs which can be defined via HTTPSamplerBase class. HTTPSamplerBase class instance is available to Beanshell PreProcessor as sampler pre-defined variable so if you add the following code into the Beanshell PreProcessor "Script" area
sampler.addEncodedArgument("airports[]","LGW");
sampler.addEncodedArgument("units[]","000577:DESTINATION");
sampler.addEncodedArgument("when","29-05-2016");
sampler.addEncodedArgument("until","");
sampler.addEncodedArgument("flexibility", "true");
sampler.addEncodedArgument("flexibleDays","3");
sampler.addEncodedArgument("noOfAdults","2");
//etc
Your HTTP request will be populated with the values, you set via Beanshell.
JMeter Variables can be accessed via vars shorthand which stands for JMeterVariables class instance.
String airport = vars.get("airport");
sampler.addEncodedArgument("airports[]", airport);
//etc
See How to Use BeanShell: JMeter's Favorite Built-in Component article for comprehensive information on how to use Beanshell Test Elements in Jmeter.
Remember that it is recommended to avoid scripting where possible so if there is another way of implementing your task - go for it.