# Copyright (c) 2012-2013, Itzik Kotler
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import unittest
import networkx
import os


# Local imports

import pythonect.internal.parsers.vdx


# Consts

BASE_DIR = os.path.join(os.path.dirname(__file__), os.pardir)
TEST_DIR = os.path.dirname(os.path.abspath(__file__))


class TestPythonectVisioParser(unittest.TestCase):

    def test_program_empty(self):

        g = networkx.DiGraph()

        self.assertEqual(len(pythonect.internal.parsers.vdx.PythonectVisioParser().parse(open(TEST_DIR + os.sep + 'vdx10_examples' + os.sep + 'program_empty.vdx').read()).nodes()) == len(g.nodes()), True)

    def test_expr_atom(self):

        g = networkx.DiGraph()

        g.add_node('1')

        self.assertEqual(len(pythonect.internal.parsers.vdx.PythonectVisioParser().parse(open(TEST_DIR + os.sep + 'vdx10_examples' + os.sep + 'expr_atom.vdx').read()).nodes()) == len(g.nodes()), True)

    def test_even_expr_atom_op_expr(self):

        g = networkx.DiGraph()

        g.add_node('1')

        g.add_node('2')

        g.add_edge('1', '2')

        self.assertEqual(len(pythonect.internal.parsers.vdx.PythonectVisioParser().parse(open(TEST_DIR + os.sep + 'vdx10_examples' + os.sep + 'even_expr_atom_op_expr.vdx').read()).edges()) == len(g.edges()), True)

    def test_odd_expr_atom_op_expr(self):

        g = networkx.DiGraph()

        g.add_node('1')

        g.add_node('2')

        g.add_node('3')

        g.add_edge('1', '2')

        g.add_edge('2', '3')

        self.assertEqual(len(pythonect.internal.parsers.vdx.PythonectVisioParser().parse(open(TEST_DIR + os.sep + 'vdx10_examples' + os.sep + 'odd_expr_atom_op_expr.vdx').read()).edges()) == len(g.edges()), True)

    def test_program_expr_list(self):

        g = networkx.DiGraph()

        g.add_node('1')

        g.add_node('2')

        self.assertEqual(len(pythonect.internal.parsers.vdx.PythonectVisioParser().parse(open(TEST_DIR + os.sep + 'vdx10_examples' + os.sep + 'program_expr_list.vdx').read()).nodes()) == len(g.nodes()), True)
