Apache JMeter is a popular open-source performance testing tool. It is a 100% pure Java application designed to load test functional behaviour and measure performance. It was originally designed for testing Web Applications but has since expanded to other test functions.
The response assertion control panel lets you add pattern strings to be compared against various fields of the request or response. The pattern strings are:
You can also choose whether the strings will be expected to match the entire response, or if the response is only expected to contain the pattern. You can attach multiple assertions to any controller for additional flexibility.
What is Assertion Results
The Assertion Results visualizer shows the Label of each sample taken. It also reports failures of any Assertions that are part of the test plan.
Note – Assertion Results MUST NOT BE USED during load test as it consumes a lot of resources (memory and CPU). Use it only for either functional testing or during Test Plan debugging and Validation.
Create a Test Plan in JMeter
Step 1 – Add Thread Group
Select Test Plan on the tree
Add Thread Group
To add Thread Group: Right click on the “Test Plan” and add a new thread group: Add -> Threads (Users) -> Thread Group
In the Thread Group control panel, enter Thread Properties as follows:
Number of Threads: 1 – Number of users connects to the target website Loop Count: 1 – Number of time to execute testing Ramp-Up Period: 1
Step 2 – Adding JMeter elements
The JMeter element used here is HTTP Request Sampler. In HTTP Request Control Panel, the Path field indicates which URL request you want to send
Add HTTP Request Sampler
To add: Right-click on Thread Group and select: Add -> Sampler -> HTTP Request
Below mentioned are the values used in HTTP Request to perform the test
Name – HTTP Request Server Name or IP – localhost Port – 8000 Method – GET Path – /example
Step 3 – Add Assertions
Add Response Assertion
The response assertion control panel lets you add pattern strings to be compared against various fields of the request or response.
To add: Right-click on HTTP Request and select: Add -> Assertions-> Response Assertions
Here, I have selected below options:-
Apply to : Main Sample only Field to Test: Text Response Pattern Matching Rules: Contains Pattern To Test: Linda
Step 4 – Add Listeners
Add Assertion Results
The Assertion Results visualizer shows the Label of each sample taken. It also reports failures of any Assertions that are part of the test plan.
To add: Right-click on Thread Group and select: Add -> Listener-> Assertion Results
View Result Tree
View Result Tree show results of the user request in basic HTML format
To add: Right click Test Plan, Add -> Listener -> View Result Tree
Step 5 – Save the Test Plan
To Save: Click File Select -> Save Test Plan as ->Give name of the Test Plan. It will be saved as .jmx format
Step 6 – Run the Test Plan
Click on Green Triangle as shown at the top to run the test
Step 7 – View the Execution Status in Assertion Results
Click on Assertion Results to see the status of Run. Successful request will like shown below.
If the test fails, we will see message mentioning the error in the Assertion Results
Step 8 – View the Execution Status in View Result Tree
Click on View Result Tree to see the status of Run. Successful request will like shown below.
View Result Tree with failed request looks like below.
That’s it! Congratulations on making it through this tutorial and hope you found it useful! Happy Learning!!
QA Automation Expert 