1 files changed, 189 insertions, 0 deletions
diff --git a/gerber/tests/test_cairo_backend.py b/gerber/tests/test_cairo_backend.py
new file mode 100644
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+++ b/gerber/tests/test_cairo_backend.py
@@ -0,0 +1,189 @@
+#! /usr/bin/env python
+# -*- coding: utf-8 -*-
+
+# Author: Garret Fick <garret@ficksworkshop.com>
+import os
+
+
+from ..render.cairo_backend import GerberCairoContext
+from ..rs274x import read
+from .tests import *
+from nose.tools import assert_tuple_equal
+
+def _DISABLED_test_render_two_boxes():
+    """Umaco exapmle of two boxes"""
+    _test_render('resources/example_two_square_boxes.gbr', 'golden/example_two_square_boxes.png')
+
+
+def _DISABLED_test_render_single_quadrant():
+    """Umaco exapmle of a single quadrant arc"""
+    _test_render('resources/example_single_quadrant.gbr', 'golden/example_single_quadrant.png')
+
+
+def test_render_simple_contour():
+    """Umaco exapmle of a simple arrow-shaped contour"""
+    gerber = _test_render('resources/example_simple_contour.gbr', 'golden/example_simple_contour.png')
+
+    # Check the resulting dimensions
+    assert_tuple_equal(((2.0, 11.0), (1.0, 9.0)), gerber.bounding_box)
+
+
+def _DISABLED_test_render_single_contour_1():
+    """Umaco example of a single contour
+
+    The resulting image for this test is used by other tests because they must generate the same output."""
+    _test_render('resources/example_single_contour_1.gbr', 'golden/example_single_contour.png')
+
+
+def _DISABLED_test_render_single_contour_2():
+    """Umaco exapmle of a single contour, alternate contour end order
+
+    The resulting image for this test is used by other tests because they must generate the same output."""
+    _test_render('resources/example_single_contour_2.gbr', 'golden/example_single_contour.png')
+
+
+def _DISABLED_test_render_single_contour_3():
+    """Umaco exapmle of a single contour with extra line"""
+    _test_render('resources/example_single_contour_3.gbr', 'golden/example_single_contour_3.png')
+
+
+def test_render_not_overlapping_contour():
+    """Umaco example of D02 staring a second contour"""
+    _test_render('resources/example_not_overlapping_contour.gbr', 'golden/example_not_overlapping_contour.png')
+
+def test_render_not_overlapping_touching():
+    """Umaco example of D02 staring a second contour"""
+    _test_render('resources/example_not_overlapping_touching.gbr', 'golden/example_not_overlapping_touching.png')
+
+
+def test_render_overlapping_touching():
+    """Umaco example of D02 staring a second contour"""
+    _test_render('resources/example_overlapping_touching.gbr', 'golden/example_overlapping_touching.png')
+
+
+def test_render_overlapping_contour():
+    """Umaco example of D02 staring a second contour"""
+    _test_render('resources/example_overlapping_contour.gbr', 'golden/example_overlapping_contour.png')
+
+
+def _DISABLED_test_render_level_holes():
+    """Umaco example of using multiple levels to create multiple holes"""
+
+    # TODO This is clearly rendering wrong. I'm temporarily checking this in because there are more
+    # rendering fixes in the related repository that may resolve these.
+    _test_render('resources/example_level_holes.gbr', 'golden/example_overlapping_contour.png')
+
+
+def _DISABLED_test_render_cutin():
+    """Umaco example of using a cutin"""
+
+    # TODO This is clearly rendering wrong.
+    _test_render('resources/example_cutin.gbr', 'golden/example_cutin.png', '/Users/ham/Desktop/cutin.png')
+
+
+def test_render_fully_coincident():
+    """Umaco example of coincident lines rendering two contours"""
+
+    _test_render('resources/example_fully_coincident.gbr', 'golden/example_fully_coincident.png')
+
+
+def test_render_coincident_hole():
+    """Umaco example of coincident lines rendering a hole in the contour"""
+
+    _test_render('resources/example_coincident_hole.gbr', 'golden/example_coincident_hole.png')
+
+
+def test_render_cutin_multiple():
+    """Umaco example of a region with multiple cutins"""
+
+    _test_render('resources/example_cutin_multiple.gbr', 'golden/example_cutin_multiple.png')
+
+
+def _DISABLED_test_flash_circle():
+    """Umaco example a simple circular flash with and without a hole"""
+
+    _test_render('resources/example_flash_circle.gbr', 'golden/example_flash_circle.png',
+                 '/Users/ham/Desktop/flashcircle.png')
+
+
+def _DISABLED_test_flash_rectangle():
+    """Umaco example a simple rectangular flash with and without a hole"""
+
+    _test_render('resources/example_flash_rectangle.gbr', 'golden/example_flash_rectangle.png')
+
+
+def _DISABLED_test_flash_obround():
+    """Umaco example a simple obround flash with and without a hole"""
+
+    _test_render('resources/example_flash_obround.gbr', 'golden/example_flash_obround.png')
+
+
+def _DISABLED_test_flash_polygon():
+    """Umaco example a simple polygon flash with and without a hole"""
+
+    _test_render('resources/example_flash_polygon.gbr', 'golden/example_flash_polygon.png')
+
+
+def _DISABLED_test_holes_dont_clear():
+    """Umaco example that an aperture with a hole does not clear the area"""
+
+    _test_render('resources/example_holes_dont_clear.gbr', 'golden/example_holes_dont_clear.png')
+
+
+def _DISABLED_test_render_am_exposure_modifier():
+    """Umaco example that an aperture macro with a hole does not clear the area"""
+
+    _test_render('resources/example_am_exposure_modifier.gbr', 'golden/example_am_exposure_modifier.png')
+
+
+def _resolve_path(path):
+    return os.path.join(os.path.dirname(__file__),
+                                path)
+
+
+def _test_render(gerber_path, png_expected_path, create_output_path = None):
+    """Render the gerber file and compare to the expected PNG output.
+
+    Parameters
+    ----------
+    gerber_path : string
+        Path to Gerber file to open
+    png_expected_path : string
+        Path to the PNG file to compare to
+    create_output : string|None
+        If not None, write the generated PNG to the specified path.
+        This is primarily to help with
+    """
+
+    gerber_path = _resolve_path(gerber_path)
+    png_expected_path = _resolve_path(png_expected_path)
+    if create_output_path:
+        create_output_path = _resolve_path(create_output_path)
+
+    gerber = read(gerber_path)
+
+    # Create PNG image to the memory stream
+    ctx = GerberCairoContext()
+    gerber.render(ctx)
+
+    actual_bytes = ctx.dump(None)
+
+    # If we want to write the file bytes, do it now. This happens
+    if create_output_path:
+        with open(create_output_path, 'wb') as out_file:
+            out_file.write(actual_bytes)
+        # Creating the output is dangerous - it could overwrite the expected result.
+        # So if we are creating the output, we make the test fail on purpose so you
+        # won't forget to disable this
+        assert_false(True, 'Test created the output %s. This needs to be disabled to make sure the test behaves correctly' % (create_output_path,))
+
+    # Read the expected PNG file
+
+    with open(png_expected_path, 'rb') as expected_file:
+        expected_bytes = expected_file.read()
+
+    # Don't directly use assert_equal otherwise any failure pollutes the test results
+    equal = (expected_bytes == actual_bytes)
+    assert_true(equal)
+
+    return gerber