tests: add testcase for #140

tests/lib1/escaped-backslash.pc

@@ -0,0 +1,4 @@
+Name: escaped-backslash
+Version: 1
+Description: test package for backslash escape scenario
+Cflags: -IC:\\A

tests/parser.sh

@@ -13,6 +13,7 @@ tests_init \
 	tilde_quoting \
 	paren_quoting \
 	multiline_field \
+	escaped_backslash \
 	flag_order_1 \
 	flag_order_2 \
 	flag_order_3 \
@@ -112,6 +113,14 @@ multiline_field_body()
 		pkgconf --list-all
 }
 
+escaped_backslash_body()
+{
+	atf_check \
+		-e ignore \
+		-o inline:"-IC:\\\\\\\\A \n" \
+		pkgconf --with-path=${selfdir}/lib1 --cflags escaped-backslash
+}
+
 quoted_body()
 {
 	export PKG_CONFIG_PATH="${selfdir}/lib1"