from local_maxima import find_maxima



def test_local_maxima_empty():
    value = []
    expected = []

    result = find_maxima(value)

    assert result == expected


def test_local_maxima_plateau():
    value = [1, 2, 2, 1]
    expected = []

    result = find_maxima(value)

    assert result == expected

def test_local_maxima_array1():
    value = [1, 3, 5, 2, 1]
    expected = [2]

    result = find_maxima(value)

    assert result == expected


def test_local_maxima_array2():
    value = [5, 4, 4, 5]
    expected = []

    result = find_maxima(value)

    assert result == expected