添加完善部分测试用例

keys_test.go

@@ -0,0 +1,43 @@
+package timerx
+
+import (
+	"testing"
+)
+
+func TestSanitizeKeyPrefix(t *testing.T) {
+	tests := []struct {
+		name     string
+		input    string
+		expected string
+	}{
+		{"normal prefix", "myapp", "myapp"},
+		{"with left brace", "my{app", "my_app"},
+		{"with right brace", "my}app", "my_app"},
+		{"with both braces", "my{app}env", "my_app_env"},
+		{"only left brace", "{", "_"},
+		{"only right brace", "}", "_"},
+		{"empty string", "", ""},
+		{"multiple braces", "a{b{c}d}e", "a_b_c_d_e"},
+		{"braces at edges", "{prefix}", "_prefix_"},
+		{"already clean", "clean_key_123", "clean_key_123"},
+		{"special chars no braces", "my:app/ver", "my:app/ver"},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := sanitizeKeyPrefix(tt.input)
+			if got != tt.expected {
+				t.Errorf("sanitizeKeyPrefix(%q) = %q, want %q", tt.input, got, tt.expected)
+			}
+		})
+	}
+}
+
+func TestSanitizeKeyPrefixConsistency(t *testing.T) {
+	// 两个仅含 {} 不同的 keyPrefix 应该 sanitize 成相同值
+	a := sanitizeKeyPrefix("foo{bar")
+	b := sanitizeKeyPrefix("foo_bar")
+	if a != b {
+		t.Errorf("expected consistent sanitization: %q != %q", a, b)
+	}
+}