"""

   Test cases for codeop.py

   Nick Mathewson

"""

import unittest

from test.test_support import run_unittest, is_jython

from codeop import compile_command, PyCF_DONT_IMPLY_DEDENT

if is_jython:

    import sys

    import cStringIO

    def unify_callables(d):

        for n,v in d.items():

            if callable(v):

                d[n] = callable

        return d

class CodeopTests(unittest.TestCase):

    def assertValid(self, str, symbol='single'):

        '''succeed iff str is a valid piece of code'''

        if is_jython:

            code = compile_command(str, "<input>", symbol)

            self.assert_(code)

            if symbol == "single":

                d,r = {},{}

                saved_stdout = sys.stdout

                sys.stdout = cStringIO.StringIO()

                try:

                    exec code in d

                    exec compile(str,"<input>","single") in r

                finally:

                    sys.stdout = saved_stdout

            elif symbol == 'eval':

                ctx = {'a': 2}

                d = { 'value': eval(code,ctx) }

                r = { 'value': eval(str,ctx) }

            self.assertEquals(unify_callables(r),unify_callables(d))

        else:

            expected = compile(str, "<input>", symbol, PyCF_DONT_IMPLY_DEDENT)

            self.assertEquals( compile_command(str, "<input>", symbol), expected)

    def assertIncomplete(self, str, symbol='single'):

        '''succeed iff str is the start of a valid piece of code'''

        self.assertEquals( compile_command(str, symbol=symbol), None)

    def assertInvalid(self, str, symbol='single', is_syntax=1):

        '''succeed iff str is the start of an invalid piece of code'''

        try:

            compile_command(str,symbol=symbol)

            self.fail("No exception thrown for invalid code")

        except SyntaxError:

            self.assert_(is_syntax)

        except OverflowError:

            self.assert_(not is_syntax)

    def test_valid(self):

        av = self.assertValid

        # special case

        if not is_jython:

            self.assertEquals(compile_command(""),

                            compile("pass", "<input>", 'single',

                                    PyCF_DONT_IMPLY_DEDENT))

            self.assertEquals(compile_command("\n"),

                            compile("pass", "<input>", 'single',

                                    PyCF_DONT_IMPLY_DEDENT))

        else:

            av("")

            av("\n")

        av("a = 1")

        av("\na = 1")

        av("a = 1\n")

        av("a = 1\n\n")

        av("\n\na = 1\n\n")

        av("def x():\n  pass\n")

        av("if 1:\n pass\n")

        av("\n\nif 1: pass\n")

        av("\n\nif 1: pass\n\n")

        av("def x():\n\n pass\n")

        av("def x():\n  pass\n  \n")

        av("def x():\n  pass\n \n")

        av("pass\n")

        av("3**3\n")

        av("if 9==3:\n   pass\nelse:\n   pass\n")

        av("if 1:\n pass\n if 1:\n  pass\n else:\n  pass\n")

        av("#a\n#b\na = 3\n")

        av("#a\n\n   \na=3\n")

        av("a=3\n\n")

        av("a = 9+ \\\n3")

        av("3**3","eval")

        av("(lambda z: \n z**3)","eval")

        av("9+ \\\n3","eval")

        av("9+ \\\n3\n","eval")

        av("\n\na**3","eval")

        av("\n \na**3","eval")

        av("#a\n#b\na**3","eval")

    def test_incomplete(self):

        ai = self.assertIncomplete

        ai("(a **")

        ai("(a,b,")

        ai("(a,b,(")

        ai("(a,b,(")

        ai("a = (")

        ai("a = {")

        ai("b + {")

        ai("if 9==3:\n   pass\nelse:")

        ai("if 9==3:\n   pass\nelse:\n")

        ai("if 9==3:\n   pass\nelse:\n   pass")

        ai("if 1:")

        ai("if 1:\n")

        ai("if 1:\n pass\n if 1:\n  pass\n else:")

        ai("if 1:\n pass\n if 1:\n  pass\n else:\n")

        ai("if 1:\n pass\n if 1:\n  pass\n else:\n  pass")

        ai("def x():")

        ai("def x():\n")

        ai("def x():\n\n")

        ai("def x():\n  pass")

        ai("def x():\n  pass\n ")

        ai("def x():\n  pass\n  ")

        ai("\n\ndef x():\n  pass")

        ai("a = 9+ \\")

        ai("a = 'a\\")

        ai("a = '''xy")

        ai("","eval")

        ai("\n","eval")

        ai("(","eval")

        ai("(\n\n\n","eval")

        ai("(9+","eval")

        ai("9+ \\","eval")

        ai("lambda z: \\","eval")

    def test_invalid(self):

        ai = self.assertInvalid

        ai("a b")

        ai("a @")

        ai("a b @")

        ai("a ** @")

        ai("a = ")

        ai("a = 9 +")

        ai("def x():\n\npass\n")

        ai("\n\n if 1: pass\n\npass")

        ai("a = 9+ \\\n")

        ai("a = 'a\\ ")

        ai("a = 'a\\\n")

        ai("a = 1","eval")

        ai("a = (","eval")

        ai("]","eval")

        ai("())","eval")

        ai("[}","eval")

        ai("9+","eval")

        ai("lambda z:","eval")

        ai("a b","eval")

    def test_filename(self):

        self.assertEquals(compile_command("a = 1\n", "abc").co_filename,

                          compile("a = 1\n", "abc", 'single').co_filename)

        self.assertNotEquals(compile_command("a = 1\n", "abc").co_filename,

                             compile("a = 1\n", "def", 'single').co_filename)

def test_main():

    run_unittest(CodeopTests)

if __name__ == "__main__":

    test_main()