Write invariant tests for desugaring

scripts/build.sh

@@ -8,9 +8,12 @@ if [ ! -e build ]; then mkdir build; else rm build/*; fi
 
 # Build library
 clang $CFLAGS -Ilib -c lib/parse.c -o build/parse.o
-ar -crs build/lib.a build/parse.o build/regex.o
+clang $CFLAGS -Ilib -c lib/desugar.c -o build/desugar.o
+ar -crs build/lib.a build/parse.o build/desugar.o
 
 # Build tests
 clang $CFLAGS -Itests -c tests/testing.c -o build/testing.o
 clang $CFLAGS -Ilib -Itests -o build/parse_tests \
 	  tests/parse_tests.c build/testing.o build/lib.a
+clang $CFLAGS -Ilib -Itests -o build/desugar_tests \
+	  tests/desugar_tests.c build/testing.o build/lib.a

scripts/test.sh

@@ -3,5 +3,6 @@ cd "$(git rev-parse --show-toplevel)"
 fails=0
 
 build/parse_tests || fails=`expr $fails + 1`
+build/desugar_tests || fails=`expr $fails + 1`
 
 if [ $fails -eq 0 ]; then echo Tests OK; fi