Added SourceSansPro-Regular along as CFF full-font test case

derived "expected" subset fonts from fonttools then manually tweaked further so they resemble hb-subset output

test/subset/data/tests/full-font.tests

 FONTS:
 Roboto-Regular.ttf
+SourceSansPro-Regular.otf
 
 PROFILES:
 default.txt

test/subset/run-tests.py

@@ -62,7 +62,7 @@ def fail_test(test, cli_args, message):
 	return 1
 
 def run_test(test, should_check_ots):
-	out_file = os.path.join(tempfile.mkdtemp (), test.get_font_name () + '-subset.ttf')
+	out_file = os.path.join(tempfile.mkdtemp (), test.get_font_name () + '-subset' + test.get_font_extension ())
 	cli_args = [hb_subset,
 		    "--font-file=" + test.font_path,
 		    "--output-file=" + out_file,
@@ -107,7 +107,7 @@ def run_ttx (file):
 def strip_check_sum (ttx_string):
 	return re.sub ('checkSumAdjustment value=["]0x([0-9a-fA-F])+["]',
 		       'checkSumAdjustment value="0x00000000"',
-		       ttx_string.decode (), count=1)
+		       ttx_string.decode ("utf-8"), count=1)
 
 def has_ots ():
 	if not ots_sanitize:

test/subset/subset_test_suite.py

@@ -28,6 +28,11 @@ class Test:
 				       self.unicodes(),
 				       font_base_name_parts[1])
 
+	def get_font_extension(self):
+		font_base_name = os.path.basename(self.font_path)
+		font_base_name_parts = os.path.splitext(font_base_name)
+		return font_base_name_parts[1]
+
 # A group of tests to perform on the subsetter. Each test
 # Identifies a font a subsetting profile, and a subset to be cut.
 class SubsetTestSuite: