tests: add testcase for notORM's backslash handling

src/notORM.sh

@@ -319,11 +319,13 @@ data_yeet() {
 
 _sed_sanitize() {
 	_trim_control "$1"
-	echo -n "$tr" | xxd -p | tr -d '\n' | sed 's/../\\x&/g'
+	# first, replace backslashes with even more backslashes (workaround for sed bug)
+	# then, do the actual sanitization, take whole expr as a hexstring and pass it on.
+	echo -n "$tr" | sed 's/\\/\\\\/g' | xxd -p | tr -d '\n' | sed 's/../\\x&/g'
 }
 
 _sed_sanitize_array() {
-	echo -n "$1" | xxd -p | tr -d '\n' | sed 's/../\\x&/g'
+	echo -n "$1" | sed 's/\\/\\\\/g' | xxd -p | tr -d '\n' | sed 's/../\\x&/g'
 }
 
 # _trim_control(string) -> $tr

tests/04-notORM.sh

@@ -88,6 +88,27 @@ notORM_replace_oldsyntax() {
 	}
 }
 
+notORM_backslashes() {
+	tst() {
+		a=('\0meow')
+		data_add "$store" a
+		a=('awawa')
+		data_add "$store" a
+
+		# checks whether data didn't get mangled and can be retrieved
+		data_get "$store" { '\0meow' } || return $?
+
+		# tries to delete the entry, then checks if it got matched
+		data_yeet "$store" { '\0meow' }
+		data_get "$store" { '\0meow' }
+		if [[ $? == 0 ]]; then
+			return 1
+		fi
+
+		return 0
+	}	
+}
+
 subtest_list=(
 	notORM_add_get
 	notORM_get_multiline
@@ -97,4 +118,5 @@ subtest_list=(
 	notORM_yeet
 	notORM_yeet_multiple_filters
 	notORM_replace_oldsyntax
+	notORM_backslashes
 )