Add arc rendering and tests

1 files changed, 85 insertions, 0 deletions

diff --git a/gerber/tests/test_primitives.py b/gerber/tests/test_primitives.py
new file mode 100644
index 0000000..29036b4
--- /dev/null
+++ b/gerber/tests/test_primitives.py
@@ -0,0 +1,85 @@
+#! /usr/bin/env python
+# -*- coding: utf-8 -*-
+
+# Author: Hamilton Kibbe <ham@hamiltonkib.be>
+from ..primitives import *
+from tests import *
+
+
+
+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), ((0, 1), (0, 1))),
+             ((-1, -1), (1, 1), ((-1, 1), (-1, 1))),
+             ((1, 1), (-1, -1), ((-1, 1), (-1, 1))),
+             ((-1, 1), (1, -1), ((-1, 1), (-1, 1))),]
+    for start, end, expected in cases:
+        l = Line(start, end, 0)
+        assert_equal(l.bounding_box, expected)
+
+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:
+        a = Arc(start, end, center, direction, 0)
+        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, 1), (-1, 1))),
+             ((1, 0), (0, 1), (0, 0), 'counterclockwise',  ((0, 1), (0, 1))),
+             #TODO: ADD MORE TEST CASES HERE
+             ]
+    
+    for start, end, center, direction, bounds in cases:
+        a = Arc(start, end, center, direction, 0)
+        assert_equal(a.bounding_box, bounds)
+    
+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)))
+    
+