from solution import calculate


def test_returns_dict_with_four_keys():
    r = calculate(10, 5)
    assert set(r.keys()) == {"sum", "difference", "product", "quotient"}


def test_basic_ten_five():
    r = calculate(10, 5)
    assert r["sum"] == 15.0
    assert r["difference"] == 5.0
    assert r["product"] == 50.0
    assert r["quotient"] == 2.0


def test_seven_two():
    r = calculate(7, 2)
    assert r["sum"] == 9.0
    assert r["difference"] == 5.0
    assert r["product"] == 14.0
    assert r["quotient"] == 3.5


def test_decimals():
    r = calculate(3.5, 1.5)
    assert r["sum"] == 5.0
    assert r["difference"] == 2.0
    assert r["product"] == 5.25


def test_string_inputs_converted():
    r = calculate("10", "5")
    assert r["sum"] == 15.0