File: test_result_map.py

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python-returns 0.26.0-2
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from returns.result import Failure, Success


def test_map_success():
    """Ensures that Success is mappable."""
    assert Success(5).map(str) == Success('5')


def test_alt_failure():
    """Ensures that Failure is mappable."""
    assert Failure(5).map(str) == Failure(5)
    assert Failure(5).alt(str) == Failure('5')


def test_alt_success():
    """Ensures that Success.alt is NoOp."""
    assert Success(5).alt(str) == Success(5)