path: root/gerber/tests/test_primitives.py

#! /usr/bin/env python
# -*- coding: utf-8 -*-

# Author: Hamilton Kibbe <ham@hamiltonkib.be>
from ..primitives import *
from .tests import *


def test_primitive_smoketest():
    p = Primitive()
    assert_raises(NotImplementedError, p.bounding_box)
    p.to_metric()
    p.to_inch()
    p.offset(1, 1)

def test_line_angle():
    """ Test Line primitive angle calculation
    """
    cases = [((0, 0), (1, 0), math.radians(0)),
             ((0, 0), (1, 1), math.radians(45)),
             ((0, 0), (0, 1), math.radians(90)),
             ((0, 0), (-1, 1), math.radians(135)),
             ((0, 0), (-1, 0), math.radians(180)),
             ((0, 0), (-1, -1), math.radians(225)),
             ((0, 0), (0, -1), math.radians(270)),
             ((0, 0), (1, -1), math.radians(315)),]
    for start, end, expected in cases:
        l = Line(start, end, 0)
        line_angle = (l.angle + 2 * math.pi) % (2 * math.pi)
        assert_almost_equal(line_angle, expected)

def test_line_bounds():
    """ Test Line primitive bounding box calculation
    """
    cases = [((0, 0), (1, 1), ((-1, 2), (-1, 2))),
             ((-1, -1), (1, 1), ((-2, 2), (-2, 2))),
             ((1, 1), (-1, -1), ((-2, 2), (-2, 2))),
             ((-1, 1), (1, -1), ((-2, 2), (-2, 2))),]

    c = Circle((0, 0), 2)
    r = Rectangle((0, 0), 2, 2)
    for shape in (c, r):
        for start, end, expected in cases:
            l = Line(start, end, shape)
            assert_equal(l.bounding_box, expected)
    # Test a non-square rectangle
    r = Rectangle((0, 0), 3, 2)
    cases = [((0, 0), (1, 1), ((-1.5, 2.5), (-1, 2))),
             ((-1, -1), (1, 1), ((-2.5, 2.5), (-2, 2))),
             ((1, 1), (-1, -1), ((-2.5, 2.5), (-2, 2))),
             ((-1, 1), (1, -1), ((-2.5, 2.5), (-2, 2))),]
    for start, end, expected in cases:
        l = Line(start, end, r)
        assert_equal(l.bounding_box, expected)

def test_line_vertices():
    c = Circle((0, 0), 2)
    l = Line((0, 0), (1, 1), c)
    assert_equal(l.vertices, None)

    # All 4 compass points, all 4 quadrants and the case where start == end
    test_cases = [((0, 0), (1, 0), ((-1, -1), (-1, 1), (2, 1), (2, -1))),
        ((0, 0), (1, 1), ((-1, -1), (-1, 1), (0, 2), (2, 2), (2, 0), (1,-1))),
        ((0, 0), (0, 1), ((-1, -1), (-1, 2), (1, 2), (1, -1))),
        ((0, 0), (-1, 1), ((-1, -1), (-2, 0), (-2, 2), (0, 2), (1, 1), (1, -1))),
        ((0, 0), (-1, 0), ((-2, -1), (-2, 1), (1, 1), (1, -1))),
        ((0, 0), (-1, -1), ((-2, -2), (1, -1), (1, 1), (-1, 1), (-2, 0), (0,-2))),
        ((0, 0), (0, -1), ((-1, -2), (-1, 1), (1, 1), (1, -2))),
        ((0, 0), (1, -1), ((-1, -1), (0, -2), (2, -2), (2, 0), (1, 1), (-1, 1))),
        ((0, 0), (0, 0), ((-1, -1), (-1, 1), (1, 1), (1, -1))),]
    r = Rectangle((0, 0), 2, 2)

    for start, end, vertices in test_cases:
        l = Line(start, end, r)
        assert_equal(set(vertices), set(l.vertices))

def test_line_conversion():
    c = Circle((0, 0), 25.4)
    l = Line((2.54, 25.4), (254.0, 2540.0), c)
    l.to_inch()
    assert_equal(l.start, (0.1, 1.0))
    assert_equal(l.end, (10.0, 100.0))
    assert_equal(l.aperture.diameter, 1.0)

    c = Circle((0, 0), 1.0)
    l = Line((0.1, 1.0), (10.0, 100.0), c)
    l.to_metric()
    assert_equal(l.start, (2.54, 25.4))
    assert_equal(l.end, (254.0, 2540.0))
    assert_equal(l.aperture.diameter, 25.4)

    r = Rectangle((0, 0), 25.4, 254.0)
    l = Line((2.54, 25.4), (254.0, 2540.0), r)
    l.to_inch()
    assert_equal(l.start, (0.1, 1.0))
    assert_equal(l.end, (10.0, 100.0))
    assert_equal(l.aperture.width, 1.0)
    assert_equal(l.aperture.height, 10.0)

    r = Rectangle((0, 0), 1.0, 10.0)
    l = Line((0.1, 1.0), (10.0, 100.0), r)
    l.to_metric()
    assert_equal(l.start, (2.54, 25.4))
    assert_equal(l.end, (254.0, 2540.0))
    assert_equal(l.aperture.width, 25.4)
    assert_equal(l.aperture.height, 254.0)

def test_line_offset():
    c = Circle((0, 0), 1)
    l = Line((0, 0), (1, 1), c)
    l.offset(1, 0)
    assert_equal(l.start,(1., 0.))
    assert_equal(l.end, (2., 1.))
    l.offset(0, 1)
    assert_equal(l.start,(1., 1.))
    assert_equal(l.end, (2., 2.))

def test_arc_radius():
    """ Test Arc primitive radius calculation
    """
    cases = [((-3, 4), (5, 0), (0, 0), 5),
            ((0, 1), (1, 0), (0, 0), 1),]

    for start, end, center, radius in cases:
        a = Arc(start, end, center, 'clockwise', 0)
        assert_equal(a.radius, radius)

def test_arc_sweep_angle():
    """ Test Arc primitive sweep angle calculation
    """
    cases = [((1, 0), (0, 1), (0, 0), 'counterclockwise', math.radians(90)),
             ((1, 0), (0, 1), (0, 0), 'clockwise', math.radians(270)),
             ((1, 0), (-1, 0), (0, 0), 'clockwise', math.radians(180)),
             ((1, 0), (-1, 0), (0, 0), 'counterclockwise', math.radians(180)),]

    for start, end, center, direction, sweep in cases:
        c = Circle((0,0), 1)
        a = Arc(start, end, center, direction, c)
        assert_equal(a.sweep_angle, sweep)

def test_arc_bounds():
    """ Test Arc primitive bounding box calculation
    """
    cases = [((1, 0), (0, 1), (0, 0), 'clockwise',  ((-1.5, 1.5), (-1.5, 1.5))),
             ((1, 0), (0, 1), (0, 0), 'counterclockwise',  ((-0.5, 1.5), (-0.5, 1.5))),
             #TODO: ADD MORE TEST CASES HERE
             ]
    for start, end, center, direction, bounds in cases:
        c = Circle((0,0), 1)
        a = Arc(start, end, center, direction, c)
        assert_equal(a.bounding_box, bounds)

def test_arc_conversion():
    c = Circle((0, 0), 25.4)
    a = Arc((2.54, 25.4), (254.0, 2540.0), (25400.0, 254000.0),'clockwise', c)
    a.to_inch()
    assert_equal(a.start, (0.1, 1.0))
    assert_equal(a.end, (10.0, 100.0))
    assert_equal(a.center, (1000.0, 10000.0))
    assert_equal(a.aperture.diameter, 1.0)

    c = Circle((0, 0), 1.0)
    a = Arc((0.1, 1.0), (10.0, 100.0), (1000.0, 10000.0),'clockwise', c)
    a.to_metric()
    assert_equal(a.start, (2.54, 25.4))
    assert_equal(a.end, (254.0, 2540.0))
    assert_equal(a.center, (25400.0, 254000.0))
    assert_equal(a.aperture.diameter, 25.4)

def test_arc_offset():
    c = Circle((0, 0), 1)
    a = Arc((0, 0), (1, 1), (2, 2), 'clockwise', c)
    a.offset(1, 0)
    assert_equal(a.start,(1., 0.))
    assert_equal(a.end, (2., 1.))
    assert_equal(a.center, (3., 2.))
    a.offset(0, 1)
    assert_equal(a.start,(1., 1.))
    assert_equal(a.end, (2., 2.))
    assert_equal(a.center, (3., 3.))

def test_circle_radius():
    """ Test Circle primitive radius calculation
    """
    c = Circle((1, 1), 2)
    assert_equal(c.radius, 1)

def test_circle_bounds():
    """ Test Circle bounding box calculation
    """
    c = Circle((1, 1), 2)
    assert_equal(c.bounding_box, ((0, 2), (0, 2)))

def test_circle_conversion():
    c = Circle((2.54, 25.4), 254.0)
    c.to_inch()
    assert_equal(c.position, (0.1, 1.))
    assert_equal(c.diameter, 10.)
    c = Circle((0.1, 1.0), 10.0)
    c.to_metric()
    assert_equal(c.position, (2.54, 25.4))
    assert_equal(c.diameter, 254.)

def test_circle_offset():
    c = Circle((0, 0), 1)
    c.offset(1, 0)
    assert_equal(c.position,(1., 0.))
    c.offset(0, 1)
    assert_equal(c.position,(1., 1.))

def test_ellipse_ctor():
    """ Test ellipse creation
    """
    e = Ellipse((2, 2), 3, 2)
    assert_equal(e.position, (2, 2))
    assert_equal(e.width, 3)
    assert_equal(e.height, 2)

def test_ellipse_bounds():
    """ Test ellipse bounding box calculation
    """
    e = Ellipse((2, 2), 4, 2)
    assert_equal(e.bounding_box, ((0, 4), (1, 3)))
    e = Ellipse((2, 2), 4, 2, rotation=90)
    assert_equal(e.bounding_box, ((1, 3), (0, 4)))
    e = Ellipse((2, 2), 4, 2, rotation=180)
    assert_equal(e.bounding_box, ((0, 4), (1, 3)))
    e = Ellipse((2, 2), 4, 2, rotation=270)
    assert_equal(e.bounding_box, ((1, 3), (0, 4)))

def test_ellipse_conversion():
    e = Ellipse((2.54, 25.4), 254.0, 2540.)
    e.to_inch()
    assert_equal(e.position, (0.1, 1.))
    assert_equal(e.width, 10.)
    assert_equal(e.height, 100.)

    e = Ellipse((0.1, 1.), 10.0, 100.)
    e.to_metric()
    assert_equal(e.position, (2.54, 25.4))
    assert_equal(e.width, 254.)
    assert_equal(e.height, 2540.)

def test_ellipse_offset():
    e = Ellipse((0, 0), 1, 2)
    e.offset(1, 0)
    assert_equal(e.position,(1., 0.))
    e.offset(0, 1)
    assert_equal(e.position,(1., 1.))

def test_rectangle_ctor():
    """ Test rectangle creation
    """
    test_cases = (((0,0), 1, 1), ((0, 0), 1, 2), ((1,1), 1, 2))
    for pos, width, height in test_cases:
        r = Rectangle(pos, width, height)
        assert_equal(r.position, pos)
        assert_equal(r.width, width)
        assert_equal(r.height, height)

def test_rectangle_bounds():
    """ Test rectangle bounding box calculation
    """
    r = Rectangle((0,0), 2, 2)
    xbounds, ybounds = r.bounding_box
    assert_array_almost_equal(xbounds, (-1, 1))
    assert_array_almost_equal(ybounds, (-1, 1))
    r = Rectangle((0,0), 2, 2, rotation=45)
    xbounds, ybounds = r.bounding_box
    assert_array_almost_equal(xbounds, (-math.sqrt(2), math.sqrt(2)))
    assert_array_almost_equal(ybounds, (-math.sqrt(2), math.sqrt(2)))

def test_rectangle_conversion():
    r = Rectangle((2.54, 25.4), 254.0, 2540.0)
    r.to_inch()
    assert_equal(r.position, (0.1, 1.0))
    assert_equal(r.width, 10.0)
    assert_equal(r.height, 100.0)
    r = Rectangle((0.1, 1.0), 10.0, 100.0)
    r.to_metric()
    assert_equal(r.position, (2.54,25.4))
    assert_equal(r.width, 254.0)
    assert_equal(r.height, 2540.0)

def test_rectangle_offset():
    r = Rectangle((0, 0), 1, 2)
    r.offset(1, 0)
    assert_equal(r.position,(1., 0.))
    r.offset(0, 1)
    assert_equal(r.position,(1., 1.))

def test_diamond_ctor():
    """ Test diamond creation
    """
    test_cases = (((0,0), 1, 1), ((0, 0), 1, 2), ((1,1), 1, 2))
    for pos, width, height in test_cases:
        d = Diamond(pos, width, height)
        assert_equal(d.position, pos)
        assert_equal(d.width, width)
        assert_equal(d.height, height)

def test_diamond_bounds():
    """ Test diamond bounding box calculation
    """
    d = Diamond((0,0), 2, 2)
    xbounds, ybounds = d.bounding_box
    assert_array_almost_equal(xbounds, (-1, 1))
    assert_array_almost_equal(ybounds, (-1, 1))
    d = Diamond((0,0), math.sqrt(2), math.sqrt(2), rotation=45)
    xbounds, ybounds = d.bounding_box
    assert_array_almost_equal(xbounds, (-1, 1))
    assert_array_almost_equal(ybounds, (-1, 1))

def test_diamond_conversion():
    d = Diamond((2.54, 25.4), 254.0, 2540.0)
    d.to_inch()
    assert_equal(d.position, (0.1, 1.0))
    assert_equal(d.width, 10.0)
    assert_equal(d.height, 100.0)

    d = Diamond((0.1, 1.0), 10.0, 100.0)
    d.to_metric()
    assert_equal(d.position, (2.54, 25.4))
    assert_equal(d.width, 254.0)
    assert_equal(d.height, 2540.0)

def test_diamond_offset():
    d = Diamond((0, 0), 1, 2)
    d.offset(1, 0)
    assert_equal(d.position,(1., 0.))
    d.offset(0, 1)
    assert_equal(d.position,(1., 1.))

def test_chamfer_rectangle_ctor():
    """ Test chamfer rectangle creation
    """
    test_cases = (((0,0), 1, 1, 0.2, (True, True, False, False)),
                  ((0, 0), 1, 2, 0.3, (True, True, True, True)),
                  ((1,1), 1, 2, 0.4, (False, False, False, False)))
    for pos, width, height, chamfer, corners in test_cases:
        r = ChamferRectangle(pos, width, height, chamfer, corners)
        assert_equal(r.position, pos)
        assert_equal(r.width, width)
        assert_equal(r.height, height)
        assert_equal(r.chamfer, chamfer)
        assert_array_almost_equal(r.corners, corners)

def test_chamfer_rectangle_bounds():
    """ Test chamfer rectangle bounding box calculation
    """
    r = ChamferRectangle((0,0), 2, 2, 0.2, (True, True, False, False))
    xbounds, ybounds = r.bounding_box
    assert_array_almost_equal(xbounds, (-1, 1))
    assert_array_almost_equal(ybounds, (-1, 1))
    r = ChamferRectangle((0,0), 2, 2, 0.2, (True, True, False, False), rotation=45)
    xbounds, ybounds = r.bounding_box
    assert_array_almost_equal(xbounds, (-math.sqrt(2), math.sqrt(2)))
    assert_array_almost_equal(ybounds, (-math.sqrt(2), math.sqrt(2)))

def test_chamfer_rectangle_conversion():
    r = ChamferRectangle((2.54, 25.4), 254.0, 2540.0, 0.254, (True, True, False, False))
    r.to_inch()
    assert_equal(r.position, (0.1, 1.0))
    assert_equal(r.width, 10.0)
    assert_equal(r.height, 100.0)
    assert_equal(r.chamfer, 0.01)

    r = ChamferRectangle((0.1, 1.0), 10.0, 100.0, 0.01, (True, True, False, False))
    r.to_metric()
    assert_equal(r.position, (2.54,25.4))
    assert_equal(r.width, 254.0)
    assert_equal(r.height, 2540.0)
    assert_equal(r.chamfer, 0.254)

def test_chamfer_rectangle_offset():
    r = ChamferRectangle((0, 0), 1, 2, 0.01, (True, True, False, False))
    r.offset(1, 0)
    assert_equal(r.position,(1., 0.))
    r.offset(0, 1)
    assert_equal(r.position,(1., 1.))

def test_round_rectangle_ctor():
    """ Test round rectangle creation
    """
    test_cases = (((0,0), 1, 1, 0.2, (True, True, False, False)),
                  ((0, 0), 1, 2, 0.3, (True, True, True, True)),
                  ((1,1), 1, 2, 0.4, (False, False, False, False)))
    for pos, width, height, radius, corners in test_cases:
        r = RoundRectangle(pos, width, height, radius, corners)
        assert_equal(r.position, pos)
        assert_equal(r.width, width)
        assert_equal(r.height, height)
        assert_equal(r.radius, radius)
        assert_array_almost_equal(r.corners, corners)

def test_round_rectangle_bounds():
    """ Test round rectangle bounding box calculation
    """
    r = RoundRectangle((0,0), 2, 2, 0.2, (True, True, False, False))
    xbounds, ybounds = r.bounding_box
    assert_array_almost_equal(xbounds, (-1, 1))
    assert_array_almost_equal(ybounds, (-1, 1))
    r = RoundRectangle((0,0), 2, 2, 0.2, (True, True, False, False), rotation=45)
    xbounds, ybounds = r.bounding_box
    assert_array_almost_equal(xbounds, (-math.sqrt(2), math.sqrt(2)))
    assert_array_almost_equal(ybounds, (-math.sqrt(2), math.sqrt(2)))

def test_round_rectangle_conversion():
    r = RoundRectangle((2.54, 25.4), 254.0, 2540.0, 0.254, (True, True, False, False))
    r.to_inch()
    assert_equal(r.position, (0.1, 1.0))
    assert_equal(r.width, 10.0)
    assert_equal(r.height, 100.0)
    assert_equal(r.radius, 0.01)

    r = RoundRectangle((0.1, 1.0), 10.0, 100.0, 0.01, (True, True, False, False))
    r.to_metric()
    assert_equal(r.position, (2.54,25.4))
    assert_equal(r.width, 254.0)
    assert_equal(r.height, 2540.0)
    assert_equal(r.radius, 0.254)

def test_round_rectangle_offset():
    r = RoundRectangle((0, 0), 1, 2, 0.01, (True, True, False, False))
    r.offset(1, 0)
    assert_equal(r.position,(1., 0.))
    r.offset(0, 1)
    assert_equal(r.position,(1., 1.))

def test_obround_ctor():
    """ Test obround creation
    """
    test_cases = (((0,0), 1, 1),
                  ((0, 0), 1, 2),
                  ((1,1), 1, 2))
    for pos, width, height in test_cases:
        o = Obround(pos, width, height)
        assert_equal(o.position, pos)
        assert_equal(o.width, width)
        assert_equal(o.height, height)

def test_obround_bounds():
    """ Test obround bounding box calculation
    """
    o = Obround((2,2),2,4)
    xbounds, ybounds = o.bounding_box
    assert_array_almost_equal(xbounds, (1, 3))
    assert_array_almost_equal(ybounds, (0, 4))
    o = Obround((2,2),4,2)
    xbounds, ybounds = o.bounding_box
    assert_array_almost_equal(xbounds, (0, 4))
    assert_array_almost_equal(ybounds, (1, 3))

def test_obround_orientation():
    o = Obround((0, 0), 2, 1)
    assert_equal(o.orientation, 'horizontal')
    o = Obround((0, 0), 1, 2)
    assert_equal(o.orientation, 'vertical')

def test_obround_subshapes():
    o = Obround((0,0), 1, 4)
    ss = o.subshapes
    assert_array_almost_equal(ss['rectangle'].position, (0, 0))
    assert_array_almost_equal(ss['circle1'].position, (0, 1.5))
    assert_array_almost_equal(ss['circle2'].position, (0, -1.5))
    o = Obround((0,0), 4, 1)
    ss = o.subshapes
    assert_array_almost_equal(ss['rectangle'].position, (0, 0))
    assert_array_almost_equal(ss['circle1'].position, (1.5, 0))
    assert_array_almost_equal(ss['circle2'].position, (-1.5, 0))

def test_obround_conversion():
    o = Obround((2.54,25.4), 254.0, 2540.0)
    o.to_inch()
    assert_equal(o.position, (0.1, 1.0))
    assert_equal(o.width, 10.0)
    assert_equal(o.height, 100.0)

    o= Obround((0.1, 1.0), 10.0, 100.0)
    o.to_metric()
    assert_equal(o.position, (2.54, 25.4))
    assert_equal(o.width, 254.0)
    assert_equal(o.height, 2540.0)

def test_obround_offset():
    o = Obround((0, 0), 1, 2)
    o.offset(1, 0)
    assert_equal(o.position,(1., 0.))
    o.offset(0, 1)
    assert_equal(o.position,(1., 1.))

def test_polygon_ctor():
    """ Test polygon creation
    """
    test_cases = (((0,0), 3, 5),
                  ((0, 0), 5, 6),
                  ((1,1), 7, 7))
    for pos, sides, radius in test_cases:
        p = Polygon(pos, sides, radius)
        assert_equal(p.position, pos)
        assert_equal(p.sides, sides)
        assert_equal(p.radius, radius)

def test_polygon_bounds():
    """ Test polygon bounding box calculation
    """
    p = Polygon((2,2), 3, 2)
    xbounds, ybounds = p.bounding_box
    assert_array_almost_equal(xbounds, (0, 4))
    assert_array_almost_equal(ybounds, (0, 4))
    p = Polygon((2,2),3, 4)
    xbounds, ybounds = p.bounding_box
    assert_array_almost_equal(xbounds, (-2, 6))
    assert_array_almost_equal(ybounds, (-2, 6))

def test_polygon_conversion():
    p = Polygon((2.54, 25.4), 3, 254.0)
    p.to_inch()
    assert_equal(p.position, (0.1, 1.0))
    assert_equal(p.radius, 10.0)

    p = Polygon((0.1, 1.0), 3, 10.0)
    p.to_metric()
    assert_equal(p.position, (2.54, 25.4))
    assert_equal(p.radius, 254.0)

def test_polygon_offset():
    p = Polygon((0, 0), 5, 10)
    p.offset(1, 0)
    assert_equal(p.position,(1., 0.))
    p.offset(0, 1)
    assert_equal(p.position,(1., 1.))

def test_region_ctor():
    """ Test Region creation
    """
    points = ((0, 0), (1,0), (1,1), (0,1))
    r = Region(points)
    for i, point in enumerate(points):
        assert_array_almost_equal(r.points[i], point)

def test_region_bounds():
    """ Test region bounding box calculation
    """
    points = ((0, 0), (1,0), (1,1), (0,1))
    r = Region(points)
    xbounds, ybounds = r.bounding_box
    assert_array_almost_equal(xbounds, (0, 1))
    assert_array_almost_equal(ybounds, (0, 1))

def test_region_conversion():
    points = ((2.54, 25.4), (254.0,2540.0), (25400.0,254000.0), (2.54,25.4))
    r = Region(points)
    r.to_inch()
    assert_equal(set(r.points), {(0.1, 1.0), (10.0, 100.0), (1000.0, 10000.0)})

    points = ((0.1, 1.0), (10.0, 100.0), (1000.0, 10000.0), (0.1, 1.0))
    r = Region(points)
    r.to_metric()
    assert_equal(set(r.points), {(2.54, 25.4), (254.0, 2540.0), (25400.0, 254000.0)})

def test_region_offset():
    points = ((0, 0), (1,0), (1,1), (0,1))
    r = Region(points)
    r.offset(1, 0)
    assert_equal(set(r.points), {(1, 0), (2, 0), (2,1), (1, 1)})
    r.offset(0, 1)
    assert_equal(set(r.points), {(1, 1), (2, 1), (2,2), (1, 2)})

def test_round_butterfly_ctor():
    """ Test round butterfly creation
    """
    test_cases = (((0,0), 3), ((0, 0), 5), ((1,1), 7))
    for pos, diameter in test_cases:
        b = RoundButterfly(pos, diameter)
        assert_equal(b.position, pos)
        assert_equal(b.diameter, diameter)
        assert_equal(b.radius, diameter/2.)

def test_round_butterfly_ctor_validation():
    """ Test RoundButterfly argument validation
    """
    assert_raises(TypeError, RoundButterfly, 3, 5)
    assert_raises(TypeError, RoundButterfly, (3,4,5), 5)

def test_round_butterfly_conversion():
     b = RoundButterfly((2.54, 25.4), 254.0)
     b.to_inch()
     assert_equal(b.position, (0.1, 1.0))
     assert_equal(b.diameter, 10.0)

     b = RoundButterfly((0.1, 1.0), 10.0)
     b.to_metric()
     assert_equal(b.position, (2.54, 25.4))
     assert_equal(b.diameter, (254.0))

def test_round_butterfly_offset():
    b = RoundButterfly((0, 0), 1)
    b.offset(1, 0)
    assert_equal(b.position,(1., 0.))
    b.offset(0, 1)
    assert_equal(b.position,(1., 1.))

def test_round_butterfly_bounds():
    """ Test RoundButterfly bounding box calculation
    """
    b = RoundButterfly((0, 0), 2)
    xbounds, ybounds = b.bounding_box
    assert_array_almost_equal(xbounds, (-1, 1))
    assert_array_almost_equal(ybounds, (-1, 1))

def test_square_butterfly_ctor():
    """ Test SquareButterfly creation
    """
    test_cases = (((0,0), 3), ((0, 0), 5), ((1,1), 7))
    for pos, side in test_cases:
        b = SquareButterfly(pos, side)
        assert_equal(b.position, pos)
        assert_equal(b.side, side)

def test_square_butterfly_ctor_validation():
    """ Test SquareButterfly argument validation
    """
    assert_raises(TypeError, SquareButterfly, 3, 5)
    assert_raises(TypeError, SquareButterfly, (3,4,5), 5)

def test_square_butterfly_bounds():
    """ Test SquareButterfly bounding box calculation
    """
    b = SquareButterfly((0, 0), 2)
    xbounds, ybounds = b.bounding_box
    assert_array_almost_equal(xbounds, (-1, 1))
    assert_array_almost_equal(ybounds, (-1, 1))

def test_squarebutterfly_conversion():
     b = SquareButterfly((2.54, 25.4), 254.0)
     b.to_inch()
     assert_equal(b.position, (0.1, 1.0))
     assert_equal(b.side, 10.0)

     b = SquareButterfly((0.1, 1.0), 10.0)
     b.to_metric()
     assert_equal(b.position, (2.54, 25.4))
     assert_equal(b.side, (254.0))

def test_square_butterfly_offset():
    b = SquareButterfly((0, 0), 1)
    b.offset(1, 0)
    assert_equal(b.position,(1., 0.))
    b.offset(0, 1)
    assert_equal(b.position,(1., 1.))

def test_donut_ctor():
    """ Test Donut primitive creation
    """
    test_cases = (((0,0), 'round', 3, 5), ((0, 0), 'square', 5, 7),
                  ((1,1), 'hexagon', 7, 9), ((2, 2), 'octagon', 9, 11))
    for pos, shape, in_d, out_d in test_cases:
        d = Donut(pos, shape, in_d, out_d)
        assert_equal(d.position, pos)
        assert_equal(d.shape, shape)
        assert_equal(d.inner_diameter, in_d)
        assert_equal(d.outer_diameter, out_d)

def test_donut_ctor_validation():
    assert_raises(TypeError, Donut, 3, 'round', 5, 7)
    assert_raises(TypeError, Donut, (3, 4, 5), 'round', 5, 7)
    assert_raises(ValueError, Donut, (0, 0), 'triangle', 3, 5)
    assert_raises(ValueError, Donut, (0, 0), 'round', 5, 3)

def test_donut_bounds():
    d = Donut((0, 0), 'round', 0.0, 2.0)
    assert_equal(d.lower_left, (-1.0, -1.0))
    assert_equal(d.upper_right, (1.0, 1.0))
    xbounds, ybounds = d.bounding_box
    assert_equal(xbounds, (-1., 1.))
    assert_equal(ybounds, (-1., 1.))

def test_donut_conversion():
    d = Donut((2.54, 25.4), 'round', 254.0, 2540.0)
    d.to_inch()
    assert_equal(d.position, (0.1, 1.0))
    assert_equal(d.inner_diameter, 10.0)
    assert_equal(d.outer_diameter, 100.0)

    d = Donut((0.1, 1.0), 'round', 10.0, 100.0)
    d.to_metric()
    assert_equal(d.position, (2.54, 25.4))
    assert_equal(d.inner_diameter, 254.0)
    assert_equal(d.outer_diameter, 2540.0)

def test_donut_offset():
    d = Donut((0, 0), 'round', 1, 10)
    d.offset(1, 0)
    assert_equal(d.position,(1., 0.))
    d.offset(0, 1)
    assert_equal(d.position,(1., 1.))

def test_drill_ctor():
    """ Test drill primitive creation
    """
    test_cases = (((0, 0), 2), ((1, 1), 3), ((2, 2), 5))
    for position, diameter in test_cases:
        d = Drill(position, diameter)
        assert_equal(d.position, position)
        assert_equal(d.diameter, diameter)
        assert_equal(d.radius, diameter/2.)

def test_drill_ctor_validation():
    """ Test drill argument validation
    """
    assert_raises(TypeError, Drill, 3, 5)
    assert_raises(TypeError, Drill, (3,4,5), 5)

def test_drill_bounds():
    d = Drill((0, 0), 2)
    xbounds, ybounds = d.bounding_box
    assert_array_almost_equal(xbounds, (-1, 1))
    assert_array_almost_equal(ybounds, (-1, 1))
    d = Drill((1, 2), 2)
    xbounds, ybounds = d.bounding_box
    assert_array_almost_equal(xbounds, (0, 2))
    assert_array_almost_equal(ybounds, (1, 3))

def test_drill_conversion():
    d = Drill((2.54, 25.4), 254.)
    d.to_inch()
    assert_equal(d.position, (0.1, 1.0))
    assert_equal(d.diameter, 10.0)

    d = Drill((0.1, 1.0), 10.)
    d.to_metric()
    assert_equal(d.position, (2.54, 25.4))
    assert_equal(d.diameter, 254.0)

def test_drill_offset():
    d = Drill((0, 0), 1.)
    d.offset(1, 0)
    assert_equal(d.position,(1., 0.))
    d.offset(0, 1)
    assert_equal(d.position,(1., 1.))

def test_drill_equality():
    d = Drill((2.54, 25.4), 254.)
    d1 = Drill((2.54, 25.4), 254.)
    assert_equal(d, d1)
    d1 = Drill((2.54, 25.4), 254.2)
    assert_not_equal(d, d1)