Migrate to pytest (#111)

* Migrate to pytest

All tests were update to use pytest.

Tests were alse black formatted. Eventually all code
will be black formatted but need to merge some PRs first.

1 files changed, 96 insertions, 44 deletions

diff --git a/gerber/tests/test_cairo_backend.py b/gerber/tests/test_cairo_backend.py
index d5ce4ed..51007a9 100644
--- a/gerber/tests/test_cairo_backend.py
+++ b/gerber/tests/test_cairo_backend.py
@@ -8,63 +8,87 @@ import tempfile
 
 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')
+    _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')
+    _test_render(
+        "resources/example_single_quadrant.gbr", "golden/example_single_quadrant.png"
+    )
 
 
-def  _DISABLED_test_render_simple_contour():
+def _DISABLED_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')
+    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)
+    assert ((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')
+    _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')
+    _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')
+    _test_render(
+        "resources/example_single_contour_3.gbr", "golden/example_single_contour_3.png"
+    )
 
 
-def  _DISABLED_test_render_not_overlapping_contour():
+def _DISABLED_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')
+    _test_render(
+        "resources/example_not_overlapping_contour.gbr",
+        "golden/example_not_overlapping_contour.png",
+    )
+
 
-def  _DISABLED_test_render_not_overlapping_touching():
+def _DISABLED_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')
+    _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')
+    _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')
+    _test_render(
+        "resources/example_overlapping_contour.gbr",
+        "golden/example_overlapping_contour.png",
+    )
 
 
 def _DISABLED_test_render_level_holes():
@@ -72,82 +96,107 @@ def _DISABLED_test_render_level_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')
+    _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')
+    _test_render(
+        "resources/example_cutin.gbr",
+        "golden/example_cutin.png",
+        "/Users/ham/Desktop/cutin.png",
+    )
 
 
-def  _DISABLED_test_render_fully_coincident():
+def _DISABLED_test_render_fully_coincident():
     """Umaco example of coincident lines rendering two contours"""
 
-    _test_render('resources/example_fully_coincident.gbr', 'golden/example_fully_coincident.png')
+    _test_render(
+        "resources/example_fully_coincident.gbr", "golden/example_fully_coincident.png"
+    )
 
 
-def  _DISABLED_test_render_coincident_hole():
+def _DISABLED_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')
+    _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')
+    _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')
+    _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')
+    _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')
+    _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')
+    _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')
+    _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')
+    _test_render(
+        "resources/example_am_exposure_modifier.gbr",
+        "golden/example_am_exposure_modifier.png",
+    )
 
 
 def test_render_svg_simple_contour():
     """Example of rendering to an SVG file"""
-    _test_simple_render_svg('resources/example_simple_contour.gbr')
+    _test_simple_render_svg("resources/example_simple_contour.gbr")
 
 
 def _resolve_path(path):
-    return os.path.join(os.path.dirname(__file__),
-                                path)
+    return os.path.join(os.path.dirname(__file__), path)
 
 
-def _test_render(gerber_path, png_expected_path, create_output_path = None):
+def _test_render(gerber_path, png_expected_path, create_output_path=None):
     """Render the gerber file and compare to the expected PNG output.
 
     Parameters
@@ -176,21 +225,24 @@ def _test_render(gerber_path, png_expected_path, create_output_path = 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:
+        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,))
+        assert not 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:
+    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)
+    equal = expected_bytes == actual_bytes
+    assert equal
 
     return gerber
 
@@ -214,14 +266,14 @@ def _test_simple_render_svg(gerber_path):
     gerber.render(ctx)
 
     temp_dir = tempfile.mkdtemp()
-    svg_temp_path = os.path.join(temp_dir, 'output.svg')
+    svg_temp_path = os.path.join(temp_dir, "output.svg")
 
-    assert_false(os.path.exists(svg_temp_path))
+    assert not os.path.exists(svg_temp_path)
     ctx.dump(svg_temp_path)
-    assert_true(os.path.exists(svg_temp_path))
+    assert os.path.exists(svg_temp_path)
 
-    with open(svg_temp_path, 'r') as expected_file:
+    with open(svg_temp_path, "r") as expected_file:
         expected_bytes = expected_file.read()
-    assert_equal(expected_bytes[:38], '<?xml version="1.0" encoding="UTF-8"?>')
+    assert expected_bytes[:38] == '<?xml version="1.0" encoding="UTF-8"?>'
 
     shutil.rmtree(temp_dir)