test: Enhance Coverage + CI (#1055)

Reviewed-on: https://gitea.com/gitea/runner/pulls/1055
Reviewed-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: bircni <bircni@icloud.com>

internal/pkg/process/sysprocattr_unix_test.go

@@ -0,0 +1,23 @@
+// Copyright 2026 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+//go:build !windows && !plan9
+
+package process
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestSysProcAttrUnixModes(t *testing.T) {
+	plain := SysProcAttr("", false)
+	require.True(t, plain.Setpgid)
+	require.False(t, plain.Setsid)
+
+	tty := SysProcAttr("", true)
+	require.True(t, tty.Setsid)
+	require.True(t, tty.Setctty)
+	require.False(t, tty.Setpgid)
+}