# Path: prolog/interpreter/parsing.py
# def parse_query_term(s):
#     return get_query_and_vars(s)[0]
# 
# def get_engine(source, create_files=False, load_system=False, **modules):
#     from prolog.interpreter.continuation import Engine
#     from prolog.interpreter.test.tool import create_file, delete_file
#     e = Engine(load_system)
#     for name, module in modules.iteritems():
#         if create_files:
#             create_file(name, module)
#         else:
#             e.runstring(module)
#     try:
#         e.modulewrapper.current_module = e.modulewrapper.user_module
#         e.runstring(source)
#     finally:
#         if create_files:
#             for name in modules.keys():
#                 delete_file(name)
#     return e
# 
# Path: prolog/interpreter/parsing.py
# def get_query_and_vars(s):
#     tokens = lexer.tokenize(s, eof=True)
#     s = parser_query.parse(tokens, lazy=False)
#     builder = TermBuilder()
#     query = builder.build_query(s)
#     return query, builder.varname_to_var
# 
# Path: prolog/interpreter/error.py
# class UnificationFailed(PrologError):
#     pass
# 
# Path: prolog/interpreter/test/tool.py
# def collect_all(engine, s):
#     terms, vars = engine.parse(s)
#     term, = terms
#     collector = CollectAllContinuation(engine.modulewrapper.user_module, vars)
#     py.test.raises(UnificationFailed, engine.run_query, term,
#             engine.modulewrapper.current_module, collector)
#     return collector.heaps
# 
# def assert_true(query, e=None):
#     if e is None:
#         e = Engine()
#     terms, vars = e.parse(query)
#     term, = terms
#     e.run_query_in_current(term)
#     return dict([(name, var.dereference(None))
#                      for name, var in vars.iteritems()])
# 
# def assert_false(query, e=None):
#     if e is None:
#         e = Engine()
#     term = e.parse(query)[0][0]
#     py.test.raises(UnificationFailed, e.run_query_in_current, term)


import py
from prolog.interpreter.continuation import *
from prolog.interpreter.parsing import parse_query_term, get_engine
from prolog.interpreter.parsing import get_query_and_vars
from prolog.interpreter.error import UnificationFailed
from prolog.interpreter.test.tool import collect_all, assert_true, assert_false
    from prolog.interpreter.term import BindingVar, Atom, Term

def test_cut_not_reached():
    class CheckContinuation(Continuation):
        def __init__(self):
            self.nextcont = None
            self.module = e.modulewrapper.user_module
        def is_done(self):
            return False
        def activate(self, fcont, heap):
            assert fcont.is_done()
            return DoneSuccessContinuation(e), DoneFailureContinuation(e), heap
    e = get_engine("""
        g(X, Y) :- X > 0, !, Y = a.
        g(_, b).
    """)
    e.run_query_in_current(parse_query_term("g(-1, Y), Y == b, g(1, Z), Z == a."), 
                           CheckContinuation())

# ___________________________________________________________________
# integration tests

def test_trivial():
    e = get_engine("""
        f(a).
    """)
    t, vars = get_query_and_vars("f(X).")
    e.run_query_in_current(t)
    assert vars['X'].dereference(None).name()== "a"

def test_and():

# Path: prolog/interpreter/parsing.py
# def parse_query_term(s):
#     return get_query_and_vars(s)[0]
# 
# def get_engine(source, create_files=False, load_system=False, **modules):
#     from prolog.interpreter.continuation import Engine
#     from prolog.interpreter.test.tool import create_file, delete_file
#     e = Engine(load_system)
#     for name, module in modules.iteritems():
#         if create_files:
#             create_file(name, module)
#         else:
#             e.runstring(module)
#     try:
#         e.modulewrapper.current_module = e.modulewrapper.user_module
#         e.runstring(source)
#     finally:
#         if create_files:
#             for name in modules.keys():
#                 delete_file(name)
#     return e
# 
# Path: prolog/interpreter/parsing.py
# def get_query_and_vars(s):
#     tokens = lexer.tokenize(s, eof=True)
#     s = parser_query.parse(tokens, lazy=False)
#     builder = TermBuilder()
#     query = builder.build_query(s)
#     return query, builder.varname_to_var
# 
# Path: prolog/interpreter/error.py
# class UnificationFailed(PrologError):
#     pass
# 
# Path: prolog/interpreter/test/tool.py
# def collect_all(engine, s):
#     terms, vars = engine.parse(s)
#     term, = terms
#     collector = CollectAllContinuation(engine.modulewrapper.user_module, vars)
#     py.test.raises(UnificationFailed, engine.run_query, term,
#             engine.modulewrapper.current_module, collector)
#     return collector.heaps
# 
# def assert_true(query, e=None):
#     if e is None:
#         e = Engine()
#     terms, vars = e.parse(query)
#     term, = terms
#     e.run_query_in_current(term)
#     return dict([(name, var.dereference(None))
#                      for name, var in vars.iteritems()])
# 
# def assert_false(query, e=None):
#     if e is None:
#         e = Engine()
#     term = e.parse(query)[0][0]
#     py.test.raises(UnificationFailed, e.run_query_in_current, term)


# Path: prolog/interpreter/test/test_continuation.py
import py
from prolog.interpreter.continuation import *
from prolog.interpreter.parsing import parse_query_term, get_engine
from prolog.interpreter.parsing import get_query_and_vars
from prolog.interpreter.error import UnificationFailed
from prolog.interpreter.test.tool import collect_all, assert_true, assert_false
    from prolog.interpreter.term import BindingVar, Atom, Term


def test_cut_not_reached():
    class CheckContinuation(Continuation):
        def __init__(self):
            self.nextcont = None
            self.module = e.modulewrapper.user_module
        def is_done(self):
            return False
        def activate(self, fcont, heap):
            assert fcont.is_done()
            return DoneSuccessContinuation(e), DoneFailureContinuation(e), heap
    e = get_engine("""
        g(X, Y) :- X > 0, !, Y = a.
        g(_, b).
    """)
    e.run_query_in_current(parse_query_term("g(-1, Y), Y == b, g(1, Z), Z == a."), 
                           CheckContinuation())

# ___________________________________________________________________
# integration tests

def test_trivial():
    e = get_engine("""
        f(a).
    """)
    t, vars = get_query_and_vars("f(X).")
    e.run_query_in_current(t)
    assert vars['X'].dereference(None).name()== "a"

def test_and():

    e = get_engine("""