from solution import vault


def test_returns_dict():
    assert isinstance(vault(), dict)


def test_mission_is_correct_string():
    v = vault()
    assert v["mission"] == "Apollo"
    assert isinstance(v["mission"], str)


def test_crew_size_is_correct_int():
    v = vault()
    assert v["crew_size"] == 3
    assert isinstance(v["crew_size"], int)
    assert not isinstance(v["crew_size"], bool)


def test_fuel_kg_is_correct_float():
    v = vault()
    assert v["fuel_kg"] == 4500.5
    assert isinstance(v["fuel_kg"], float)


def test_ready_is_true_bool():
    v = vault()
    assert v["ready"] is True