[Codenarc-user] BracesForClassRule not working with enums

[Marcin G. <ma...@gr...>]

BracesForClassRule doesn't work well for enums. If you add a new test case
to BracesForClassRuleTest:

@Test
void testEnum() {
    final SOURCE = '''
        enum MyClass {

        }
    '''
    rule.sameLine = false
    assertSingleViolation(SOURCE, 2, 'class MyClass {', 'Opening brace for
the class MyClass should start on a new line')
}

Then the assertion message is following:

java.lang.AssertionError: Wrong line number for violation:
Violation[rule=BracesForClassRule[name=BracesForClass, priority=2],
lineNumber=-1, sourceLine=null, message=Opening brace for the class MyClass
should start on a new line]
Expected: 2
Found:    -1

After debugging, it seems to be a Groovy issue.
AstUtil.findFirstNonAnnotationLine calls node.getLineNumber() and the
ClassNode represeting an enum returns -1.

Any ideas on how to fix this issue (or find a feasible workaround)? Parse
the source code and find out the line number?

Background: we are working on some CodeNarc issues during our open source
days.

Marcin Gryszko  <http://twitter.com/mgryszko>
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