robot framework: exception handling

Question

Is it possible to handle exceptions from the test case? I have 2 kinds of failure I want to track: a test failed to run, and a test ran but received the wrong output. If I need to raise an exception to fail my test, how can I distinguish between the two failure types? So say I have the following:

*** Test Cases ***
Case 1
    Login            1.2.3.4    user    pass
    Check Log For    this log line

If I can't log in, then the Login Keyword would raise an ExecutionError. If the log file doesn't exist, I would also get an ExecutionError. But if the log file does exist and the line isn't in the log, I should get an OutputError.

I may want to immediately fail the test on an ExecutionError, since it means my test did not run and there is some issue that needs to be fixed in the environment or with the test case. But on an OutputError, I may want to continue the test. It may only refer to a single piece of output and the test may be valuable to continue to check the rest of the output.

How can this be done?

Bryan Oakley · Accepted Answer · 2015-09-10 22:31:58Z

3

Robot has several keywords for dealing with errors, such as Run keyword and ignore error which can be used to run another keyword that might fail. From the documentation:

This keyword returns two values, so that the first is either string PASS or FAIL, depending on the status of the executed keyword. The second value is either the return value of the keyword or the received error message. See Run Keyword And Return Status If you are only interested in the execution status.

That being said, it might be easier to write a python-based keyword which calls your Login keyword, since it will be easier to deal with multiple exceptions.

answered Sep 10, 2015 at 22:31

Bryan Oakley

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Shrikanth N · Accepted Answer · 2018-10-29 20:38:02Z

1

You can use something like this

${err_msg}=  Run Keyword And Expect Error  *  <Your keyword>
Should Not Be Empty  ${err_msg}

There are couple of different variations you could try like Run Keyword And Continue On Failure, Run Keyword And Expect Error, Run Keyword And Ignore Error for the first statement above.

Option for the second statement above are Should Be Equal As Strings, Should Contain, Should Match.

You can explore more on Robot keywords

answered Oct 29, 2018 at 20:38

Shrikanth N

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