How to suppress ERROR logging in the unit tests

Question

In the TestNG unit test, I test, that an exception is caught and logged.

This code is being tested

    try {
        workloadServiceImpl.actionStarted(resourceType);
    } catch (Exception e) {
        LOGGER.error("Error measuring workload during actionStarted, resourceType=" + resourceType + ": " + e.getMessage(), e);
    }

by this test

@Test
public void testMeasureWorkflow_actionStartedExceptionCaught() throws Throwable {
    doThrow(new RuntimeException()).when(workloadService).actionStarted(any());
    tested.measureWorkloadForDatabase(joinPoint);
}

However during unit tests I don't want the exception to be logged. It catches other developers attention if they see it and then they waste time, by wondering, why is there an exception in log. Is there a mechanism, how to suppress logging of this exception during unit tests? We use logback, but logback-test.xml is being used also by integration tests and in that kind of test I don't want to suppress the exception logging, so fixing it in logback-test.xml file is not the preferred way.

score 3 · Accepted Answer · edited May 23 '17 at 12:08

3

You'll want to create a filter that asserts the values of the logged event and doesn't allow the request to go through.

It is the same concept as what is done in How to verify that error was logged with unit tests but you'll have to port it to logback.

edited May 23 '17 at 12:08

Community

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1

answered Dec 01 '16 at 15:24

jmehrens

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Sorry for late acceptation, 5 years ago I didn't know what you were talking about :). – Michal Krasny Oct 25 '21 at 07:22

score 0 · Answer 2 · answered Dec 01 '16 at 15:19

0

I'm not familiar with logback, but can you turn off ERROR logging in testMeasureWorkflow_actionStartedExceptionCaught before you run it?

answered Dec 01 '16 at 15:19

Brian Pipa

808
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How to suppress ERROR logging in the unit tests

2 Answers2