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# RUN: %{python} %s

import unittest

from lit.ShUtil import Command, Pipeline, Seq, ShLexer, ShParser


class TestShLexer(unittest.TestCase):
    def lex(self, str, *args, **kwargs):
        return list(ShLexer(str, *args, **kwargs).lex())

    def test_basic(self):
        self.assertEqual(self.lex('a|b>c&d<e;f'),
                         ['a', ('|',), 'b', ('>',), 'c', ('&',), 'd', 
                          ('<',), 'e', (';',), 'f'])

    def test_redirection_tokens(self):
        self.assertEqual(self.lex('a2>c'),
                         ['a2', ('>',), 'c'])
        self.assertEqual(self.lex('a 2>c'),
                         ['a', ('>',2), 'c'])

    def test_quoting(self):
        self.assertEqual(self.lex(""" 'a' """),
                         ['a'])
        self.assertEqual(self.lex(""" "hello\\"world" """),
                         ['hello"world'])
        self.assertEqual(self.lex(""" "hello\\'world" """),
                         ["hello\\'world"])
        self.assertEqual(self.lex(""" "hello\\\\world" """),
                         ["hello\\world"])
        self.assertEqual(self.lex(""" he"llo wo"rld """),
                         ["hello world"])
        self.assertEqual(self.lex(""" a\\ b a\\\\b """),
                         ["a b", "a\\b"])
        self.assertEqual(self.lex(""" "" "" """),
                         ["", ""])
        self.assertEqual(self.lex(""" a\\ b """, win32Escapes = True),
                         ['a\\', 'b'])

class TestShParse(unittest.TestCase):
    def parse(self, str):
        return ShParser(str).parse()

    def test_basic(self):
        self.assertEqual(self.parse('echo hello'),
                         Pipeline([Command(['echo', 'hello'], [])], False))
        self.assertEqual(self.parse('echo ""'),
                         Pipeline([Command(['echo', ''], [])], False))
        self.assertEqual(self.parse("""echo -DFOO='a'"""),
                         Pipeline([Command(['echo', '-DFOO=a'], [])], False))
        self.assertEqual(self.parse('echo -DFOO="a"'),
                         Pipeline([Command(['echo', '-DFOO=a'], [])], False))

    def test_redirection(self):
        self.assertEqual(self.parse('echo hello > c'),
                         Pipeline([Command(['echo', 'hello'], 
                                           [((('>'),), 'c')])], False))
        self.assertEqual(self.parse('echo hello > c >> d'),
                         Pipeline([Command(['echo', 'hello'], [(('>',), 'c'),
                                                     (('>>',), 'd')])], False))
        self.assertEqual(self.parse('a 2>&1'),
                         Pipeline([Command(['a'], [(('>&',2), '1')])], False))

    def test_pipeline(self):
        self.assertEqual(self.parse('a | b'),
                         Pipeline([Command(['a'], []),
                                   Command(['b'], [])],
                                  False))

        self.assertEqual(self.parse('a | b | c'),
                         Pipeline([Command(['a'], []),
                                   Command(['b'], []),
                                   Command(['c'], [])],
                                  False))

    def test_list(self):
        self.assertEqual(self.parse('a ; b'),
                         Seq(Pipeline([Command(['a'], [])], False),
                             ';',
                             Pipeline([Command(['b'], [])], False)))

        self.assertEqual(self.parse('a & b'),
                         Seq(Pipeline([Command(['a'], [])], False),
                             '&',
                             Pipeline([Command(['b'], [])], False)))

        self.assertEqual(self.parse('a && b'),
                         Seq(Pipeline([Command(['a'], [])], False),
                             '&&',
                             Pipeline([Command(['b'], [])], False)))

        self.assertEqual(self.parse('a || b'),
                         Seq(Pipeline([Command(['a'], [])], False),
                             '||',
                             Pipeline([Command(['b'], [])], False)))

        self.assertEqual(self.parse('a && b || c'),
                         Seq(Seq(Pipeline([Command(['a'], [])], False),
                                 '&&',
                                 Pipeline([Command(['b'], [])], False)),
                             '||',
                             Pipeline([Command(['c'], [])], False)))

        self.assertEqual(self.parse('a; b'),
                         Seq(Pipeline([Command(['a'], [])], False),
                             ';',
                             Pipeline([Command(['b'], [])], False)))

if __name__ == '__main__':
    unittest.main()