import unittest

from reactivex import operators as ops
from reactivex.testing import ReactiveTest, TestScheduler

on_next = ReactiveTest.on_next
on_completed = ReactiveTest.on_completed
on_error = ReactiveTest.on_error
subscribe = ReactiveTest.subscribe
subscribed = ReactiveTest.subscribed
disposed = ReactiveTest.disposed
created = ReactiveTest.created


class TestContains(unittest.TestCase):
    def test_contains_empty(self):
        scheduler = TestScheduler()
        msgs = [on_next(150, 1), on_completed(250)]
        xs = scheduler.create_hot_observable(msgs)

        def create():
            return xs.pipe(ops.contains(42))

        res = scheduler.start(create=create).messages
        assert res == [on_next(250, False), on_completed(250)]

    def test_contains_return_positive(self):
        scheduler = TestScheduler()
        msgs = [on_next(150, 1), on_next(210, 2), on_completed(250)]
        xs = scheduler.create_hot_observable(msgs)

        def create():
            return xs.pipe(ops.contains(2))

        res = scheduler.start(create=create).messages
        assert res == [on_next(210, True), on_completed(210)]

    def test_contains_return_negative(self):
        scheduler = TestScheduler()
        msgs = [on_next(150, 1), on_next(210, 2), on_completed(250)]
        xs = scheduler.create_hot_observable(msgs)

        def create():
            return xs.pipe(ops.contains(-2))

        res = scheduler.start(create=create).messages
        assert res == [on_next(250, False), on_completed(250)]

    def test_contains_some_positive(self):
        scheduler = TestScheduler()
        msgs = [
            on_next(150, 1),
            on_next(210, 2),
            on_next(220, 3),
            on_next(230, 4),
            on_completed(250),
        ]
        xs = scheduler.create_hot_observable(msgs)

        def create():
            return xs.pipe(ops.contains(3))

        res = scheduler.start(create=create).messages
        assert res == [on_next(220, True), on_completed(220)]

    def test_contains_some_negative(self):
        scheduler = TestScheduler()
        msgs = [
            on_next(150, 1),
            on_next(210, 2),
            on_next(220, 3),
            on_next(230, 4),
            on_completed(250),
        ]
        xs = scheduler.create_hot_observable(msgs)

        def create():
            return xs.pipe(ops.contains(-3))

        res = scheduler.start(create=create).messages
        assert res == [on_next(250, False), on_completed(250)]

    def test_contains_on_error(self):
        ex = "ex"
        scheduler = TestScheduler()
        xs = scheduler.create_hot_observable(on_next(150, 1), on_error(210, ex))

        def create():
            return xs.pipe(ops.contains(42))

        res = scheduler.start(create=create).messages
        assert res == [on_error(210, ex)]

    def test_contains_never(self):
        scheduler = TestScheduler()
        msgs = [on_next(150, 1)]
        xs = scheduler.create_hot_observable(msgs)

        def create():
            return xs.pipe(ops.contains(42))

        res = scheduler.start(create=create).messages
        assert res == []

    def test_contains_comparer_throws(self):
        ex = "ex"
        scheduler = TestScheduler()
        xs = scheduler.create_hot_observable(on_next(150, 1), on_next(210, 2))

        def create():
            def comparer(a, b):
                raise Exception(ex)

            return xs.pipe(ops.contains(42, comparer))

        res = scheduler.start(create=create).messages
        assert res == [on_error(210, ex)]

    def test_contains_comparer_contains_value(self):
        scheduler = TestScheduler()
        xs = scheduler.create_hot_observable(
            on_next(150, 1),
            on_next(210, 3),
            on_next(220, 4),
            on_next(230, 8),
            on_completed(250),
        )

        def create():
            return xs.pipe(ops.contains(42, lambda a, b: a % 2 == b % 2))

        res = scheduler.start(create=create).messages
        assert res == [on_next(220, True), on_completed(220)]

    def test_contains_comparer_does_not_contain_value(self):
        scheduler = TestScheduler()
        xs = scheduler.create_hot_observable(
            on_next(150, 1),
            on_next(210, 2),
            on_next(220, 4),
            on_next(230, 8),
            on_completed(250),
        )

        def create():
            return xs.pipe(ops.contains(21, lambda a, b: a % 2 == b % 2))

        res = scheduler.start(create=create).messages
        assert res == [on_next(250, False), on_completed(250)]