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"""Tests for framework.status.

This module does not have the comprehensive tests for all of the various
combinations of comparisons between the various kinds of functions. Instead, it
just asserts that the regressions, fixes, etc lists are as expected.

"""

import itertools

import pytest

from framework import status


# Statuses from worst to last. NotRun is intentionally not in this list and
# tested separately because of upcoming features for it
STATUSES = [
    status.PASS,
    status.WARN,
    status.DMESG_WARN,
    status.FAIL,
    status.DMESG_FAIL,
    status.TIMEOUT,
    status.CRASH,
    status.INCOMPLETE,
]

# all statuses except pass are problems
PROBLEMS = STATUSES[1:]

# Create lists of fixes and regressions programmatically based on the STATUSES
# list. This means less code, and easier expansion changes.
REGRESSIONS = list(itertools.combinations(STATUSES, 2)) + \
              list(itertools.combinations([status.SKIP] + PROBLEMS, 2))
FIXES = list(itertools.combinations(reversed(STATUSES), 2)) + \
        list(itertools.combinations(list(reversed(PROBLEMS)) + [status.SKIP], 2))

# The statuses that don't cause changes when transitioning from one another
NO_OPS = [status.SKIP, status.NOTRUN]


@pytest.mark.raises(exception=status.StatusException)
def test_bad_lookup():
    """status.status_lookup: An unexpected value raises a StatusException"""
    status.status_lookup('foobar')


@pytest.mark.raises(exception=TypeError)
def test_status_eq_raises():
    """status.Status: eq comparison to uncomparable object results in TypeError"""
    status.PASS == dict()


@pytest.mark.raises(exception=TypeError)
def test_nochangestatus_eq_raises():
    """status.NoChangeStatus: eq comparison to uncomparable type results in TypeError"""
    status.NOTRUN == dict()


@pytest.mark.raises(exception=TypeError)
def test_nochangestatus_ne_raises():
    """status.NoChangeStatus: ne comparison to uncomparable type results in TypeError"""
    status.NOTRUN != dict()


def test_status_in():
    """status.Status: A status can be looked up with 'x in y' synatx"""
    stat = status.PASS
    slist = ['pass']

    assert stat in slist


@pytest.mark.parametrize(
    'stat', itertools.chain(STATUSES, [status.SKIP, status.NOTRUN]))
def test_lookup(stat):
    status.status_lookup(stat)


@pytest.mark.parametrize('new,old', REGRESSIONS)
def test_regression(new, old):
    assert status.status_lookup(new) < status.status_lookup(old)


@pytest.mark.parametrize('new,old', FIXES)
def test_fixes(new, old):
    assert status.status_lookup(new) > status.status_lookup(old)


@pytest.mark.parametrize('new,old', itertools.permutations(STATUSES, 2))
def test_changes(new, old):
    assert status.status_lookup(new) != status.status_lookup(old)


@pytest.mark.parametrize('new,old', itertools.permutations(NO_OPS, 2))
def test_no_change(new, old):
    new = status.status_lookup(new)
    old = status.status_lookup(old)
    assert not new < old
    assert not new > old


@pytest.mark.parametrize("stat,op,expected", [
    (status.Status('Test', 0, (0, 0)), str, 'Test'),
    (status.Status('Test', 0, (0, 0)), bytes, b'Test'),
    (status.Status('Test', 0, (0, 0)), int, 0),
    (status.Status('Test', 0, (0, 0)), repr, 'Status("Test", 0, (0, 0))'),
    (status.Status('Test', 0, (0, 0)), hash, hash('Test')),
    (status.NoChangeStatus('No'), hash, hash('No')),
])
def test_status_comparisons(stat, op, expected):
    """Test status.Status equality protocol."""
    assert op(stat) == expected
