`delta` arg in self.assertAlmostEqual

[Danny Sepler]

this one seems tricky

self.assertAlmostEqual(a, b, delta=0.5)  # assert a - b <= 0.5

[Philip Vegdahl]

How about this? I think this is equivalent.

assert a == pytest.approx(b, abs=0.5)

[Danny Sepler]

yes! i think so too. run pytest on this, should all pass

import unittest

import pytest

def test_fail():
    with pytest.raises(AssertionError):
        assert 0.1 == pytest.approx(0.7, abs=0.5)


def test_success():
    assert 0.1 == pytest.approx(0.5, abs=0.5)


class TestCase(unittest.TestCase):
    def test_assert_almost_eq_when_succeeds(self):
        self.assertAlmostEqual(0.1, 0.5, delta=0.5)

    def test_assert_almost_eq(self):
        with self.assertRaises(AssertionError):
            self.assertAlmostEqual(0.1, 0.7, delta=0.5)