Made the image comparisson more fuzzy.

tests/test_plot/test_pcbdraw.py

@@ -105,7 +105,10 @@ def test_pcbdraw_variant_1():
     # Check all outputs are there
     fname = prj+'-top.png'
     ctx.expect_out_file(fname)
-    ctx.compare_image(fname)
+    # We use 30% because different versions of the tools are generating large differences
+    # in the borders. With 30% these differences are removed and we still detect is a
+    # components was removed.
+    ctx.compare_image(fname, fuzz='30%')
     ctx.clean_up()
 
 
@@ -116,7 +119,7 @@ def test_pcbdraw_variant_2():
     # Check all outputs are there
     fname = prj+'-top-C1.png'
     ctx.expect_out_file(fname)
-    ctx.compare_image(fname)
+    ctx.compare_image(fname, fuzz='30%')
     ctx.clean_up()
 
 
@@ -127,6 +130,6 @@ def test_pcbdraw_variant_3():
     # Check all outputs are there
     fname = prj+'-top.png'
     ctx.expect_out_file(fname)
-    ctx.compare_image(fname)
+    ctx.compare_image(fname, fuzz='30%')
     assert ctx.search_err("Ambiguous list of components to show .?none.? vs variant/filter")
     ctx.clean_up()

tests/utils/context.py

@@ -310,7 +310,7 @@ class TestContext(object):
             logging.debug(msg+' OK')
             # logging.debug(' '+m.group(0))
 
-    def compare_image(self, image, reference=None, diff='diff.png', ref_out_dir=False):
+    def compare_image(self, image, reference=None, diff='diff.png', ref_out_dir=False, fuzz='5%'):
         """ For images and single page PDFs """
         if reference is None:
             reference = image
@@ -320,7 +320,7 @@ class TestContext(object):
             reference = os.path.join(REF_DIR, reference)
         cmd = ['compare',
                # Tolerate 5 % error in color
-               '-fuzz', '5%',
+               '-fuzz', fuzz,
                # Count how many pixels differ
                '-metric', 'AE',
                self.get_out_path(image),