Method do_approx_equal_rel_test

Lib/test/test_statistics.py:517–522

(self, x, delta)

    # === Relative error tests ===

    def do_approx_equal_rel_test(self, x, delta):
        template = "Test failure for x={!r}, y={!r}"
        for y in (x*(1+delta), x*(1-delta)):
            msg = template.format(x, y)
            self.assertTrue(approx_equal(x, y, tol=0, rel=2*delta), msg)
            self.assertFalse(approx_equal(x, y, tol=0, rel=delta/2), msg)

    def test_approx_equal_relative_ints(self):
        # Test approximate equality of ints with a relative error.