[jira] [Created] (LUCENE-7009) Add expectThrows utility to LuceneTestCase

["Ryan Ernst (JIRA)" <ji...@apache.org>]

Ryan Ernst created LUCENE-7009:
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             Summary: Add expectThrows utility to LuceneTestCase
                 Key: LUCENE-7009
                 URL: https://issues.apache.org/jira/browse/LUCENE-7009
             Project: Lucene - Core
          Issue Type: Bug
            Reporter: Ryan Ernst


In junit5, a neat assertion method is added which makes testing expected
failures a little more straightforward. The block of code that is
expected to throw is passed in with a lambda expression, and the caught
exception returned for inspection. The usage looks something like this:

{code}
IOException e = expectThrows(IOException.class, () -> {
    throw new IOException("some io error");
});
// assert stuff here about the exception
{code}

We should add this to LuceneTestCase until junit5 is available.



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