#!/usr/bin/env python
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__revision__ = "__FILE__ __REVISION__ __DATE__ __DEVELOPER__"

"""
Test that .output file is cleaned
"""

import TestSCons

_exe = TestSCons._exe

test = TestSCons.TestSCons()

yacc = test.where_is('yacc') or test.where_is('bison')

if not yacc:
    test.skip_test('No yacc or bison found; skipping test.\n')

test.write('SConstruct', """
foo = Environment(YACCFLAGS='-v -d')
foo.CFile(source = 'foo.y')
""" % locals())

yacc = r"""
%%{
#include <stdio.h>

main()
{
    yyparse();
}

yyerror(s)
char *s;
{
    fprintf(stderr, "%%s\n", s);
    return 0;
}

yylex()
{
    int c;

    c = fgetc(stdin);
    return (c == EOF) ? 0 : c;
}
%%}
%%%%
input:  letter newline { printf("%s\n"); };
letter:  'a' | 'b';
newline: '\n';
"""

test.write('foo.y', yacc % 'foo.y')

test.run('.', stderr = None)

test.up_to_date(arguments = 'foo.c')

test.must_exist(test.workpath('foo.output'))
test.must_exist(test.workpath('foo.c'))

test.run(arguments = '-c .')
test.must_not_exist(test.workpath('foo.output'))
test.must_not_exist(test.workpath('foo.c'))

test.pass_test()

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