[antlr-interest] gUnit help needed

[Meikel]

Hello,

 

I'm a beginner with ANTLR and with gUnit and need some help about gUnit. The
only documentation about gUnit I have is
http://www.antlr.org/wiki/display/ANTLR3/gUnit+-+Grammar+Unit+Testing

 

To get a better understanding of how gUnit works I created a really small
example which does not work correctly. I have a grammar for parsing language
{ a, A, b, B, ab, Ab, aB, AB } defined in a file Sample.g:

 

grammar Sample;

 

@header {

package parser;

}

 

@lexer::header {

package parser;

}

 

A : 'a' | 'A';

B : 'b' | 'B';

 

start : A

            | (A B)

            | B

            ;

 

Further I have some unit tests defined in file Sample.gunit:

 

gunit Sample;

@header{

      package parser;

}

 

 

A:

"a" OK

"A" OK

"b" FAIL

 

B:

"b" OK

"B" OK

"a" FAIL

 

start:

 

"a" OK

"ab" OK

 

When I run the tests using Maven (org.antlr:maven-gunit-plugin:3.3) with
ANTLR 3.3 I get the following failures:

 

-----------------------------------------------------------------------

executing testsuite for grammar:Sample with 8 tests

-----------------------------------------------------------------------

2 failures found:

test7 (start, line19) - 

expected: OK

actual: FAIL

 

test8 (start, line20) - 

expected: OK

actual: FAIL

 

 

Tests run: 8, Failures: 2

 

What is the reason for the last two tests (for rule "start:") failing?
Perhaps this is not a problem with the test case but the grammar doesn't
work as expected?

 

Cheers,

 

Meikel