def test_get_leading_power_coefficients(self, expression_string, x0,
coefficients,
expected_leading_power):
np.testing.assert_almost_equal(
symbolic_properties.get_leading_power(expression_string,
x0,
coefficients=coefficients),
expected_leading_power)
def test_get_leading_power_nan(self, expression_string, x0):
np.testing.assert_equal(
symbolic_properties.get_leading_power(expression_string, x0),
np.nan)
def test_get_leading_power(self, expression_string, x0,
expected_leading_power):
np.testing.assert_almost_equal(
symbolic_properties.get_leading_power(expression_string, x0),
expected_leading_power)
def test_get_leading_power_invalid_x0(self):
with self.assertRaisesRegex(ValueError,
'x0 is expected to be 0 or inf, got 5'):
symbolic_properties.get_leading_power('x ** 2 + x + 1', x0='5')