package packed

import (
	"bytes"
	"os"
	"testing"
)

func TestMapAndLoad(t *testing.T) {
	rawPack, err := os.ReadFile("testdata/helloworld.pack")
	if err != nil {
		t.Fatal(err)
	}
	rawText, err := os.ReadFile("testdata/helloworld.txt")
	if err != nil {
		t.Fatal(err)
	}

	mapped, err := MapAndLoad("testdata/helloworld.pack")
	if err != nil {
		t.Fatal(err)
	}
	defer mapped.Close()

	if !bytes.Equal(mapped.Data, rawPack) {
		t.Error("mapped data does not match raw file")
	}

	file := mapped.Directory.Files["/helloworld.txt"]
	if file == nil {
		t.Fatal("directory does not contain /helloworld.txt")
	}

	start := file.Uncompressed.Offset
	end := start + file.Uncompressed.Length
	if !bytes.Equal(rawText, mapped.Data[start:end]) {
		t.Error("uncompressed file does not match testdata/helloworld.txt")
	}
}