Add check for tests that are supposed to error out, and clean up code based on shellcheck suggestions

tests/test.sh

@@ -6,9 +6,9 @@ do
 	for source in *.d
 	do
 		echo "${source}.ref" "${braceStyle}/${source}.out"
-		argsFile=$(basename ${source} .d).args
-		if [ -e ${argsFile} ]; then
-			args=$(cat ${argsFile})
+		argsFile=$(basename "${source}" .d).args
+		if [ -e "${argsFile}" ]; then
+			args=$(cat "${argsFile}")
 		else
 			args=
 		fi
@@ -16,3 +16,12 @@ do
 		diff -u "${braceStyle}/${source}.ref" "${braceStyle}/${source}.out"
 	done
 done
+
+set +e
+
+for source in expected_failures/*.d
+do
+	if ../bin/dfmt "${source}" > /dev/null; then
+		exit 1
+	fi
+done