From 80ce15901faa3a069b817ae42a2abe95e5cc50ea Mon Sep 17 00:00:00 2001
From: sonnemusk <sonnemusk@gmail.com>
Date: Thu, 23 Jul 2026 18:35:23 +0800
Subject: [PATCH] fix: reject empty filename in LoadFile

Trim path and error clearly when the filename is blank.
---
 empty_file_test.go | 12 ++++++++++++
 load.go            |  4 ++++
 2 files changed, 16 insertions(+)
 create mode 100644 empty_file_test.go

diff --git a/empty_file_test.go b/empty_file_test.go
new file mode 100644
index 0000000..9aeb739
--- /dev/null
+++ b/empty_file_test.go
@@ -0,0 +1,12 @@
+package properties
+
+import "testing"
+
+func TestLoadFileEmptyPath(t *testing.T) {
+	if _, err := LoadFile("  ", UTF8); err == nil {
+		t.Fatal("expected error")
+	}
+	if _, err := LoadFile("", UTF8); err == nil {
+		t.Fatal("expected error")
+	}
+}
diff --git a/load.go b/load.go
index 3d5573f..57337aa 100644
--- a/load.go
+++ b/load.go
@@ -195,6 +195,10 @@ func LoadMap(m map[string]string) *Properties {
 
 // LoadFile reads a file into a Properties struct.
 func LoadFile(filename string, enc Encoding) (*Properties, error) {
+	filename = strings.TrimSpace(filename)
+	if filename == "" {
+		return nil, fmt.Errorf("properties: empty filename")
+	}
 	l := &Loader{Encoding: enc}
 	return l.LoadAll([]string{filename})
 }