earthsnake/tests/test_identity.py

"""Tests for the Identity class
"""

import bip39
from ed25519 import SigningKey, create_keypair
import pytest
from pytest_mock.plugin import MockerFixture

from earthsnake.exc import ValidationError
from earthsnake.identity import Identity

from .helpers import DEFAULT_IDENTITY_SEED as TEST_SEED, random_name

TEST_MNEMONIC = bip39.encode_bytes(TEST_SEED)


@pytest.mark.parametrize(
    'name',
    [
        pytest.param('s', id='veryshort'),
        pytest.param('sho', id='short'),
        pytest.param('longy', id='long'),
        pytest.param('verylong', id='verylong'),
        pytest.param('0num', id='numberstart'),
    ],
)
def test_init_bad_name(name: str) -> None:
    """Test if initialisation is not possible with an invalid name"""

    sign, verify = create_keypair()

    with pytest.raises(ValidationError) as ctx:
        Identity(name, verify_key=verify, sign_key=sign)

    assert 'Invalid name' in str(ctx.value)


def test_init_key_mismatch() -> None:
    """Test if initialisation fails if the signing and verifying keys don’t match"""

    sign1, _ = create_keypair()
    _, verify2 = create_keypair()

    with pytest.raises(ValidationError) as ctx:
        Identity('name', verify_key=verify2, sign_key=sign1)

    assert 'Signing and verifying keys don’t match' in str(ctx.value)


def test_init_no_keys() -> None:
    """Test if initialisation is not possible without keys"""

    with pytest.raises(ValidationError) as ctx:
        Identity('name')

    assert 'At least verify_key must be present' in str(ctx.value)


@pytest.mark.id_key_seed(TEST_SEED)
@pytest.mark.id_name('test')
def test_str(identity: Identity) -> None:
    """Test if the __str__ method returns the author address"""

    assert str(identity) == '@test.bcz76z52y5dlpohtkmpuj3jsdcvfmebzpcgfmtmhu4u7hlexzreya'


@pytest.mark.id_key_seed(TEST_SEED)
@pytest.mark.id_name('test')
def test_repr(identity: Identity) -> None:
    """Test if the __repr__ method returns the author address"""

    assert (
        repr(identity)
        == '<Identity (signer) @test.bcz76z52y5dlpohtkmpuj3jsdcvfmebzpcgfmtmhu4u7hlexzreya>'
    )


def test_repr_nosign() -> None:
    """Test the __repr__ method marks the identity as a signer in the output"""

    identity = Identity.from_address('@test.bcz76z52y5dlpohtkmpuj3jsdcvfmebzpcgfmtmhu4u7hlexzreya')

    assert (
        repr(identity) == '<Identity @test.bcz76z52y5dlpohtkmpuj3jsdcvfmebzpcgfmtmhu4u7hlexzreya>'
    )


def test_from_address() -> None:
    """Test loading an identity from an author address"""

    skey = SigningKey(TEST_SEED)
    vkey = skey.get_verifying_key()
    identity = Identity.from_address('@test.bcz76z52y5dlpohtkmpuj3jsdcvfmebzpcgfmtmhu4u7hlexzreya')

    assert identity.name == 'test'
    assert identity.sign_key is None
    assert identity.verify_key.to_bytes() == vkey.to_bytes()


def test_from_invalid_address() -> None:
    """Test loading an identity from an invalid address"""

    with pytest.raises(ValidationError) as ctx:
        Identity.from_address('@inva.lid')

    assert 'Invalid address @inva.lid' in str(ctx.value)


def test_generate(mocker: MockerFixture) -> None:
    """Test the generate property"""

    skey = SigningKey(TEST_SEED)
    vkey = skey.get_verifying_key()

    mocker.patch('earthsnake.identity.create_keypair', return_value=(skey, vkey))
    identity = Identity.generate('test')

    assert str(identity) == '@test.bcz76z52y5dlpohtkmpuj3jsdcvfmebzpcgfmtmhu4u7hlexzreya'
    assert identity.sign_key
    assert identity.verify_key
    assert identity.name == 'test'


@pytest.mark.id_key_seed(TEST_SEED)
@pytest.mark.id_name('test')
def test_mnemonic(identity: Identity) -> None:
    """Test the mnemonic property"""

    assert identity.mnemonic == f'test {TEST_MNEMONIC}'


def test_mnemonic_no_signing_key() -> None:
    """Test if the mnemonic property returns None if there is no signing key"""

    identity = Identity.from_address('@test.bcz76z52y5dlpohtkmpuj3jsdcvfmebzpcgfmtmhu4u7hlexzreya')

    assert identity.mnemonic is None


def test_from_mnemonic() -> None:
    """Test if identities can be loaded from mnemonics"""

    name = random_name()
    identity = Identity.from_mnemonic(f'{name} {TEST_MNEMONIC}')

    assert identity.name == name
    assert identity.sign_key
    assert identity.sign_key.to_seed() == TEST_SEED
    assert str(identity) == f'@{name}.bcz76z52y5dlpohtkmpuj3jsdcvfmebzpcgfmtmhu4u7hlexzreya'


@pytest.mark.parametrize(
    'address',
    [
        pytest.param('noat.bcz76z52y5dlpohtkmpuj3jsdcvfmebzpcgfmtmhu4u7hlexzreya', id='no_at'),
        pytest.param(
            '@toolong.bcz76z52y5dlpohtkmpuj3jsdcvfmebzpcgfmtmhu4u7hlexzreya',
            id='too_long',
        ),
        pytest.param('@test.invalidkey', id='invalid_key'),
        pytest.param(
            '@test.cz76z52y5dlpohtkmpuj3jsdcvfmebzpcgfmtmhu4u7hlexzreya',
            id='nonprefixed_key',
        ),
        pytest.param('@test.many.periods', id='many_periods'),
    ],
)
def test_valid_address_invalid(address: str) -> None:
    """Test if valid_address fails for invalid addresses"""

    assert Identity.valid_address(address) is False


def test_valid_address() -> None:
    """Test if valid_address passes on valid addresses"""

    assert Identity.valid_address('@test.bcz76z52y5dlpohtkmpuj3jsdcvfmebzpcgfmtmhu4u7hlexzreya')


def test_eq_str() -> None:
    """Test if an Identity is considered equal to its string representation"""

    identity_str = '@test.bcz76z52y5dlpohtkmpuj3jsdcvfmebzpcgfmtmhu4u7hlexzreya'
    identity = Identity.from_address(identity_str)

    assert identity == identity_str
    assert identity != '@test.cz76z52y5dlpohtkmpuj3jsdcvfmebzpcgfmtmhu4u7hlexzreyb'


def test_eq_identity() -> None:
    """Test if two different identities are considered equal if their verifying key is equal"""

    identity_str = '@test.bcz76z52y5dlpohtkmpuj3jsdcvfmebzpcgfmtmhu4u7hlexzreya'
    identity1 = Identity.from_address(identity_str)
    identity2 = Identity.from_address(identity_str)
    identity3 = Identity.generate('some')

    assert identity1 == identity2
    assert identity1 != identity3


@pytest.mark.id_key_seed(TEST_SEED)
@pytest.mark.id_name('test')
def test_eq_other(identity: Identity) -> None:
    """Test if Identity cannot be compared to something like an int"""

    with pytest.raises(TypeError):
        assert identity == 1


def test_sign_nokey() -> None:
    """Test if Identity.sign() fails if the identity doesn’t have a signing key available"""

    identity_str = '@test.bcz76z52y5dlpohtkmpuj3jsdcvfmebzpcgfmtmhu4u7hlexzreya'
    identity = Identity.from_address(identity_str)

    with pytest.raises(TypeError):
        identity.sign('test data')


@pytest.mark.id_key_seed(TEST_SEED)
@pytest.mark.id_name('test')
def test_sign(identity: Identity) -> None:
    """Test if Identity.sign() works as expected"""

    assert (
        identity.sign('test data')
        == 'b6gyis42cvdfhsp7xx3jb4773ebbqoq4zhdo4pyeitskefrfkkzxwdkwjkjpq2oyglpngx4tpzzezeedp7eb'
        'x4i3vkpq7wj6odjinacy'
    )


@pytest.mark.id_key_seed(TEST_SEED)
@pytest.mark.id_name('test')
def test_verify(identity: Identity) -> None:
    """Test if Identity.verify works as expected"""

    assert (
        identity.verify(
            'test data',
            'b6gyis42cvdfhsp7xx3jb4773ebbqoq4zhdo4pyeitskefrfkkzxwdkwjkjpq2oyglpngx4tpzzezeedp7eb'
            'x4i3vkpq7wj6odjinacy',
        )
        is True
    )
    assert (
        identity.verify(
            'test date',
            'b6gyis42cvdfhsp7xx3jb4773ebbqoq4zhdo4pyeitskefrfkkzxwdkwjkjpq2oyglpngx4tpzzezeedp7eb'
            'x4i3vkpq7wj6odjinacy',
        )
        is False
    )
    assert (
        identity.verify(
            'test data',
            'b6gyis42cvdfhsp7xx3jb4773ebbqoq4zhdo4pyeitskefrfkkzxwdkwjkjpq2oyglpngx4tpzzezeedp7eb'
            'x4i3vkpq7wj6odjinacq',
        )
        is False
    )