# Copyright (C) 2016 Allen Li
#
# 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.

"""Test data constructors."""

import pytest

import mir.monads.data as data


class UnaryConstructor(metaclass=data.Constructor):
    arity = 1


def test_invalid_arguments():
    with pytest.raises(TypeError):
        UnaryConstructor()


def test_eq():
    assert UnaryConstructor(1) == UnaryConstructor(1)


def test_not_eq_value():
    assert UnaryConstructor(1) != UnaryConstructor(2)


def test_not_eq_tuple():
    assert UnaryConstructor(1) != (1,)
