package ftp

import "testing"

func TestValidateRemoteRelativePath(t *testing.T) {
	valid, err := validateRemoteRelativePath("snapgo/2026/07/image.png")
	if err != nil {
		t.Fatalf("valid path rejected: %v", err)
	}
	if valid != "snapgo/2026/07/image.png" {
		t.Fatalf("unexpected normalized path %q", valid)
	}

	invalid := []string{
		"",
		"/absolute/image.png",
		"~/image.png",
		"../image.png",
		"snapgo/../../image.png",
		"snapgo\\image.png",
		"snapgo/image.png\nnext",
	}
	for _, value := range invalid {
		if _, err := validateRemoteRelativePath(value); err == nil {
			t.Errorf("expected %q to be rejected", value)
		}
	}
}

func TestProbeRemotePathRejectsTraversalPrefix(t *testing.T) {
	if _, err := probeRemotePath("../../outside"); err == nil {
		t.Fatal("expected traversal prefix to fail")
	}
}