import pytest
from ee import EeVal


@pytest.mark.parametrize("s, num_value, str_value, unit", [
    ("0", 0, "0", None),
    ("0 k", 0, "0", None),
    ("1", 1, "1", None),
    ("1e-3", 0.001, "1 m", None),
    ("1e3", 1000, "1 k", None),
    ("4.7e3", 4700, "4.7 k", None),
    ("4.e3", 4000, "4 k", None),
    ("10", 10, "10", None),
    ("10k", 10 * 1000, "10 k", None),
    ("10 k", 10 * 1000, "10 k", None),
    ("10  k", 10 * 1000, "10 k", None),
    ("1000 m", 1, "1", None),
    ("100 m", 0.1, "100 m", None),
    ("100 n", 0.0000001, "100 n", None),
    ("1 m", 0.001, "1 m", None),
    ("1 u", 0.000001, "1 u", None),
    ("0.1 u", 0.0000001, "100 n", None),
    (".1 u", 0.0000001, "100 n", None),
    ("4.7 u", 0.0000047, "4.7 u", None),
    ("1 µ", 0.000001, "1 u", None),
    ("1 n", 0.000000001, "1 n", None),
    ("10 n", 0.00000001, "10 n", None),
    ("1p", 1e-12, "1 p", None),
    ("0.8p", 8e-13, "0.8 p", None),
    ("0.008p", 8e-15, "0.008 p", None),
])
def test_basic(s, num_value, str_value, unit):
    num_value = float(num_value)
    v = EeVal(s)
    assert v.value == float(v)
    epsilon = num_value * 0.01
    assert (num_value + epsilon) >= float(v) >= (num_value - epsilon)
    assert str(v) == str_value
    assert v.unit == unit


@pytest.mark.parametrize("s, str_value, unit", [
    ("10nF", "10 nF", "F"),
    ("10 nF", "10 nF", "F"),
    ("10n F", "10 nF", "F"),
    ("10 n F", "10 nF", "F"),
    ("4.7 n F", "4.7 nF", "F"),
    ("10Ω", "10 Ω", "Ω"),
    ("10 Ω", "10 Ω", "Ω"),
    ("10 Ohm", "10 Ohm", "Ohm"),
])
def test_units(s, str_value, unit):
    v = EeVal(s)
    assert unit == v.unit
    assert float(v) == v.value
    assert str_value == str(v)


def test_ordering():
    p100 = EeVal('100 p')
    n100 = EeVal('100 n')
    n100f = EeVal('100 n F')
    u1 = EeVal('1u')
    assert n100 > p100
    assert p100 < n100
    assert n100f < u1
    assert [p100, n100, u1] == sorted([p100, u1, n100])


def test_hash():
    p100 = EeVal('100 p')
    n100 = EeVal('100 n')
    u1 = EeVal('1u')

    assert 3 == len({p100, p100, n100, u1})