Add test suite for shaping results

The new test suite runs tests included under
hb/test/shaping/tests/*.tests, which themselves reference
font files stored by sha1sum under hb/test/shaping/fonts/sha1sum.
The fonts are produced using a subsetter to only include glyphs
needed to run the test.

Four initial tests are added for (Chain)Context matching,
of which three currently fail.

test/shaping/Makefile.am

@@ -7,7 +7,7 @@ DISTCLEANFILES =
 MAINTAINERCLEANFILES =
 
 manifests:
-	@$(srcdir)/hb-manifest-update "$(srcdir)/texts" "$(srcdir)/fonts"
+	@$(srcdir)/hb-manifest-update "$(srcdir)/texts" "$(srcdir)/fonts" "$(srcdir)/tests"
 
 EXTRA_DIST += \
 	hb-diff \
@@ -20,6 +20,7 @@ EXTRA_DIST += \
 	hb-unicode-decode \
 	hb-unicode-encode \
 	hb-unicode-prettyname \
+	run-tests.sh \
 	$(NULL)
 
 # TODO Figure out Python stuff
@@ -30,6 +31,13 @@ CLEANFILES += \
 	hb_test_tools.py[co] \
 	$(NULL)
 
+TESTS = $(srcdir)/tests/*.tests
+TESTS_ENVIRONMENT = \
+	srcdir="$(srcdir)" \
+	builddir="$(builddir)" \
+	$(srcdir)/run-tests.sh \
+	$(NULL)
+
 .PHONY: manifests
 
 -include $(top_srcdir)/git.mk

test/shaping/run-tests.sh

@@ -0,0 +1,34 @@
+#!/bin/bash
+
+test "x$srcdir" = x && srcdir=.
+test "x$builddir" = x && builddir=.
+test "x$top_builddir" = x && top_builddir=../..
+
+hb_shape=$top_builddir/util/hb-shape
+
+fails=0
+
+if test $# = 0; then
+	set /dev/stdin
+fi
+
+IFS=:
+for f in "$@"; do
+	echo "Running tests in $f"
+	while read fontfile unicodes glyphs_expected; do
+		echo "Testing $fontfile:$unicodes"
+		glyphs=`$srcdir/hb-unicode-encode "$unicodes" | $hb_shape "$srcdir/$fontfile"`
+		if ! test "x$glyphs" = "x$glyphs_expected"; then
+			echo "Actual:   $glyphs" >&2
+			echo "Expected: $glyphs_expected" >&2
+			let fails=$fails+1
+		fi
+	done < "$f"
+done
+
+if test $fails != 0; then
+	echo "$fails tests failed."
+	exit 1
+else
+	echo "All tests passed."
+fi

test/shaping/tests/MANIFEST

@@ -0,0 +1 @@
+context-matching.tests

test/shaping/tests/context-matching.tests

@@ -0,0 +1,4 @@
+fonts/sha1sum/4cce528e99f600ed9c25a2b69e32eb94a03b4ae8.ttf:U+1A48,U+1A58,U+1A25,U+1A48,U+1A58,U+1A25,U+1A6E,U+1A63:[uni1A48=0+1212|uni1A25=0+1912|uni1A58=0+0|uni1A48=3+1212|uni1A6E=3+1212|uni1A25=3+1912|uni1A58=3+0|uni1A63=3+1212]
+fonts/sha1sum/d629e7fedc0b350222d7987345fe61613fa3929a.ttf:U+0915,U+093F,U+0915,U+093F:[ivowelsign03deva=0+530|kadeva=0+1561|ivowelsign03deva=2+530|kadeva=2+1561]
+fonts/sha1sum/f499fbc23865022234775c43503bba2e63978fe1.ttf:U+09B0,U+09CD,U+09A5,U+09CD,U+09AF,U+09C0:[gid1=0+1320|gid13=0+523|gid18=0+545]
+fonts/sha1sum/ceadd106a8205214fbe7337ef9de32a862b59762.ttf:U+1014,U+1039,U+1011,U+1014,U+1039,U+1011,U+1014,U+1039,U+1011:[gid4=0+1118|gid5=0@97,0+600|gid4=3+1118|gid5=3@97,0+600|gid4=6+1118|gid5=6@97,0+0]