package idgen

import (
	"net/url"
	"strings"
	"testing"
)

func TestNewHasPrefix(t *testing.T) {
	id := New("sg")
	if !strings.HasPrefix(id, "sg_") {
		t.Fatalf("New(%q) = %q, want prefix sg_", "sg", id)
	}
}

func TestNewIsUnique(t *testing.T) {
	seen := make(map[string]bool)
	for i := 0; i < 1000; i++ {
		id := New("sg")
		if seen[id] {
			t.Fatalf("duplicate ID generated: %s", id)
		}
		seen[id] = true
	}
}

func TestNewIsURLSafe(t *testing.T) {
	id := New("al")
	if url.PathEscape(id) != id {
		t.Fatalf("New() = %q is not URL-safe when path-escaped: %q", id, url.PathEscape(id))
	}
}

func TestNewNoPrefix(t *testing.T) {
	id := New("")
	if strings.Contains(id, "_") {
		t.Fatalf("New(\"\") = %q should not contain an underscore", id)
	}
}