# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.

from __future__ import absolute_import, print_function, unicode_literals

import unittest

from ..graph import Graph
from ..task import Task
from ..taskgraph import TaskGraph
from mozunit import main


class TestTaskGraph(unittest.TestCase):

    maxDiff = None

    def test_taskgraph_to_json(self):
        tasks = {
            'a': Task(kind='test', label='a',
                      attributes={'attr': 'a-task'},
                      task={'taskdef': True}),
            'b': Task(kind='test', label='b',
                      attributes={},
                      task={'task': 'def'},
                      optimizations=[['seta']],
                      # note that this dep is ignored, superseded by that
                      # from the taskgraph's edges
                      dependencies={'first': 'a'}),
        }
        graph = Graph(nodes=set('ab'), edges={('a', 'b', 'edgelabel')})
        taskgraph = TaskGraph(tasks, graph)

        res = taskgraph.to_json()

        self.assertEqual(res, {
            'a': {
                'kind': 'test',
                'label': 'a',
                'attributes': {'attr': 'a-task', 'kind': 'test'},
                'task': {'taskdef': True},
                'dependencies': {'edgelabel': 'b'},
                'optimizations': [],
            },
            'b': {
                'kind': 'test',
                'label': 'b',
                'attributes': {'kind': 'test'},
                'task': {'task': 'def'},
                'dependencies': {},
                'optimizations': [['seta']],
            }
        })

    def test_round_trip(self):
        graph = TaskGraph(tasks={
            'a': Task(
                kind='fancy',
                label='a',
                attributes={},
                dependencies={'prereq': 'b'},  # must match edges, below
                optimizations=[['seta']],
                task={'task': 'def'}),
            'b': Task(
                kind='pre',
                label='b',
                attributes={},
                dependencies={},
                optimizations=[['seta']],
                task={'task': 'def2'}),
        }, graph=Graph(nodes={'a', 'b'}, edges={('a', 'b', 'prereq')}))

        tasks, new_graph = TaskGraph.from_json(graph.to_json())
        self.assertEqual(graph, new_graph)

if __name__ == '__main__':
    main()
