# Copyright (c) 2021 PaddlePaddle Authors. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import unittest

import paddle
from paddle.distributed.fleet.fleet_executor_utils import TaskNode
from paddle.fluid import core

paddle.enable_static()


class TestFleetExecutorTaskNode(unittest.TestCase):
    def test_task_node(self):
        program = paddle.static.Program()
        task_node_0 = core.TaskNode(program.desc, 0, 0, 1)
        task_node_1 = core.TaskNode(program.desc, 0, 1, 1)
        task_node_2 = core.TaskNode(program.desc, 0, 2, 1)
        self.assertEqual(task_node_0.task_id(), 0)
        self.assertEqual(task_node_1.task_id(), 1)
        self.assertEqual(task_node_2.task_id(), 2)
        self.assertTrue(
            task_node_0.add_downstream_task(
                task_node_1.task_id(), 1, core.DependType.NORMAL
            )
        )
        self.assertTrue(
            task_node_1.add_upstream_task(
                task_node_0.task_id(), 1, core.DependType.NORMAL
            )
        )

    def test_lazy_task_node(self):
        program = paddle.static.Program()
        task = TaskNode(
            program=program,
            rank=0,
            max_run_times=1,
            lazy_initialize=True,
        )
        task_node = task.task_node()


if __name__ == "__main__":
    unittest.main()
