[subset] Add integration tests for SingleSubst.

test/subset/data/Makefile.sources

@@ -2,6 +2,7 @@ TESTS = \
 	tests/basics.tests \
 	tests/full-font.tests \
 	tests/japanese.tests \
+	tests/layout.tests \
 	$(NULL)
 
 XFAIL_TESTS = \

test/subset/data/profiles/keep-layout-retain-gids.txt

@@ -0,0 +1,2 @@
+--drop-tables-=GSUB,GPOS
+--retain-gids

test/subset/data/profiles/keep-layout.txt

@@ -0,0 +1 @@
+--drop-tables-=GSUB,GPOS

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

@@ -9,4 +9,3 @@ SUBSETS:
 abc
 Ǽ!A bc
 ×ØÙÚÞ
-

test/subset/data/tests/layout.tests

@@ -0,0 +1,13 @@
+FONTS:
+Roboto-Regular.smallcaps.ttf
+
+PROFILES:
+keep-layout.txt
+keep-layout-retain-gids.txt
+
+SUBSETS:
+ABC
+AC
+C
+A
+ÊË

test/subset/generate-expected-outputs.py

@@ -19,14 +19,15 @@ def usage():
 
 def generate_expected_output(input_file, unicodes, profile_flags, output_path):
 	args = ["fonttools", "subset", input_file]
-	args.extend(profile_flags)
 	args.extend(["--notdef-outline",
 		     "--name-IDs=*",
 		     "--name-languages=*",
 		     "--name-legacy",
 		     "--drop-tables+=DSIG,GPOS,GSUB,GDEF",
+                     "--layout-features=*",
 		     "--unicodes=%s" % unicodes,
 		     "--output-file=%s" % output_path])
+	args.extend(profile_flags)
 	check_call(args)