Handle negative cases in JMETER, for example my expected output response is 400 - jmeter

Question

How to handle negative cases in JMETER, for example my expected output response is 400("There are no records") for an GET API?
In JMETER response is coming as failure or warning.
Is JMeter only handle positive scenarios like for all GET API response code should be 200 ?

Answer 1

Add Response Assertion as a child of the HTTP Request sampler which returns HTTP Status Code 400
Configure it as follows:
Tick Ignore status box
Set "Field to test" to Response code
Set "Pattern matching rules" to Equals
Add 400 as a "Pattern to test"
This way JMeter will pass only if the parent HTTP Request sampler returns 400 status code, otherwise it will fail.

Answer 2

You can add to HTTP Request Response Assertion with Ignore status checked
HTTP Responses with statuses in the 4xx and 5xx ranges are normally regarded as unsuccessful. The "Ignore status" checkbox can be used to set the status successful before performing further checks. Note that this will have the effect of clearing any previous assertion failures, so make sure that this is only set on the first assertion.

Answer 3

I tried with this, by adding a BeanShell Assertion with following code.
import org.apache.jmeter.assertions.AssertionResult;
String failureMessage = "";
String ResCode = SampleResult.getResponseCode();
if (!ResCode.equals("400")) {
failureMessage = "Got Response Code" + ResCode;
AssertionResult result = new AssertionResult("Expected Response 400");
result.setFailure(true);
result.setFailureMessage(failureMessage);
prev.addAssertionResult(result);
prev.setSuccessful(false);
SampleResult.setStartNextThreadLoop(true);
} else {
//failure criteria
}