python-testing-with-pytest/ch2/tasks_proj/tests/func/test_unique_id_4.py at master · jashburn8020/python-testing-with-pytest · GitHub

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"""Test tasks.unique_id()."""

import pytest
import tasks
from tasks import Task


@pytest.mark.xfail(
    tasks.__version__ < "0.2.0", reason="not supported until version 0.2.0"
)
def test_unique_id_1():
    """Calling unique_id() twice should return different numbers."""
    id_1 = tasks.unique_id()
    id_2 = tasks.unique_id()
    assert id_1 != id_2


@pytest.mark.xfail()
def test_unique_id_is_a_duck():
    """Demonstrate xfail."""
    uid = tasks.unique_id()
    assert uid == "a duck"


@pytest.mark.xfail()
def test_unique_id_not_a_duck():
    """Demonstrate xpass."""
    uid = tasks.unique_id()
    assert uid != "a duck"


def test_unique_id_2():
    """unique_id() should return an unused id."""
    ids = []
    ids.append(tasks.add(Task("one")))
    ids.append(tasks.add(Task("two")))
    ids.append(tasks.add(Task("three")))
    # grab a unique id
    uid = tasks.unique_id()
    # make sure it isn't in the list of existing ids
    assert uid not in ids


@pytest.fixture(autouse=True)
def initialized_tasks_db(tmpdir):
    """Connect to db before testing, disconnect after."""
    tasks.start_tasks_db(str(tmpdir), "tiny")
    yield
    tasks.stop_tasks_db()