package pagination

import (
	"encoding/json"
	"math"
	"net/url"
	"strings"
	"testing"
)

func TestBoundsAndEnvelope(t *testing.T) {
	for _, raw := range []string{"page=0", "page=1&page=2", "pageSize=101", "page=9223372036854775807&pageSize=100", "pageSize=-1"} {
		q, _ := url.ParseQuery(raw)
		if _, err := Parse(q, Config{}); err == nil {
			t.Fatal(raw)
		}
	}
	r, err := Parse(url.Values{"page": {"2"}, "pageSize": {"30"}}, Config{})
	if err != nil || r.Offset() != 30 {
		t.Fatal(r, err)
	}
	result, err := NewResult(r, []string(nil), math.MaxInt64)
	if err != nil || result.TotalPages != math.MaxInt64/30+1 {
		t.Fatal(result, err)
	}
	raw, _ := json.Marshal(result)
	if !strings.Contains(string(raw), `"items":[]`) || !strings.Contains(string(raw), `"pageSize":30`) {
		t.Fatal(string(raw))
	}
}