# Copyright (c) 2009 Tim Freeman
# 
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
# 
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
# 
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
#
# (This is the standard MIT License, copied from
# http://www.opensource.org/licenses/mit-license.php on 24 Apr 2007.)
import test_util
from test_util import assert_in
from compile import turing_program, turing_compile, compile_actions
from constants import left, right, end, done, truncate

assert compile_actions(actions={0:(1, left, "haszero"),
                                1:(1, left, "hasone"),
                                end:(1, left, "end")},
                       state_numbers={"haszero":0, "hasone":1, "end":2},
                       bits_per_stateno=3,
                       state=1) == 0211101

# Verify that we get proper "Error when compiling state xxx" messages.
def exercise():
    turing_compile(turing_program("trunc",
                                  trunc={(0,1,end):("blort", right, "done")}))
v = test_util.with_output_to_string(exercise)
assert v["exception"] is not None
assert_in("Error when compiling state 'trunc'", v["output"])

def exercise2():
    turing_compile(turing_program("trunc",
                                  trunc={(0,1,end):"trunc"}))
v = test_util.with_output_to_string(exercise2)
assert v["exception"] is not None
assert_in("Could not interpret 'trunc' as a Turing machine action", str(v["exception"]))

# Verify that pretty_octal works right.
empty_as = turing_program("trunc",
                          trunc={(0,1,end):(truncate, right, "done")},
                          done=done)
c = turing_compile(empty_as, pretty_octal = True)
assert c.program == 01313131616163L