scons_gd/scons/test/YACC/live.py

#!/usr/bin/env python
#
# MIT License
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# Copyright The SCons Foundation
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"""
Test YACC and YACCFLAGS with a live yacc compiler.
"""

import TestSCons

_exe = TestSCons._exe
_python_ = TestSCons._python_

test = TestSCons.TestSCons()

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

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

test.file_fixture('wrapper.py')

test.write('SConstruct', """
DefaultEnvironment(tools=[])
foo = Environment(YACCFLAGS='-d', tools=['default', 'yacc'])
yacc = foo.Dictionary('YACC')
bar = Environment(YACC=r'%(_python_)s wrapper.py ' + yacc, tools=['default', 'yacc'])
foo.Program(target='foo', source='foo.y')
bar.Program(target='bar', source='bar.y')
foo.Program(target='hello', source=['hello.cpp'])
foo.CXXFile(target='file.cpp', source=['file.yy'], YACCFLAGS='-d')
foo.CFile(target='not_foo', source='foo.y')
""" % locals())

yacc = r"""
%%{
#include <stdio.h>
extern int yyparse();
int yyerror(char *s);
int yylex();

int main(void)
{
    return yyparse();
}

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

int yylex()
{
    int c;

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

test.write("file.yy", """\
%token   GRAPH_T NODE_T EDGE_T DIGRAPH_T EDGEOP_T SUBGRAPH_T

%%
graph:        GRAPH_T
              ;

%%
""")

# Apparently, OS X now creates file.hpp like everybody else
# I have no idea when it changed; it was fixed in 10.4
#import sys
#if sys.platform[:6] == 'darwin':
#   file_hpp = 'file.cpp.h'
#else:
#   file_hpp = 'file.hpp'
file_hpp = 'file.hpp'

test.write("hello.cpp", """\
#include "%(file_hpp)s"

int main(void)
{
}
""" % locals())

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

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



test.run(arguments = 'foo' + _exe, stderr = None)

test.up_to_date(arguments = 'foo' + _exe)

test.must_not_exist(test.workpath('wrapper.out'))

test.run(program = test.workpath('foo'), stdin = "a\n", stdout = "foo.y\n")

test.must_exist(test.workpath('foo.h'))

test.run(arguments = '-c .')

test.must_not_exist(test.workpath('foo.h'))



test.run(arguments = 'not_foo.c')

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

test.must_not_exist(test.workpath('foo.h'))
test.must_exist(test.workpath('not_foo.h'))

test.run(arguments = '-c .')

test.must_not_exist(test.workpath('not_foo.h'))



test.run(arguments = 'bar' + _exe)

test.up_to_date(arguments = 'bar' + _exe)

test.must_match(test.workpath('wrapper.out'), "wrapper.py\n")

test.run(program = test.workpath('bar'), stdin = "b\n", stdout = "bar.y\n")



test.run(arguments = '.')

test.up_to_date(arguments = '.')



test.pass_test()

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