test_circle.py

import pytest
import math
from .. import Circle

# Polytest Suite: circle

RADIUS = 7
circle = Circle(RADIUS)

# Polytest Group: circle


@pytest.mark.group_circle
def test_non_numeric():
    """Using a non-numeric radius should throw an error"""
    with pytest.raises(ValueError):
        Circle("Some radius")


@pytest.mark.group_circle
def test_diameter():
    """A circle should be able to accurately calculate its diameter"""
    assert circle.diameter() == 14


@pytest.mark.group_circle
def test_radius():
    """A circle should be able to accurately calculate its radius"""
    assert circle.radius == 7


# Polytest Group: shape


@pytest.mark.group_shape
def test_perimeter():
    """A shape should be able to accurately calculate its perimeter (or circumference)"""
    assert circle.perimeter() == math.pi * RADIUS * 2


@pytest.mark.group_shape
def test_area():
    """A shape should be able to accurately calculate its area"""
    assert circle.area() == math.pi * RADIUS**2