package sharding

import (
	"math/big"
	"testing"

	"github.com/ethereum/go-ethereum/common"
	"github.com/ethereum/go-ethereum/core/types"
)

func TestCollation_Transactions(t *testing.T) {
	header := NewCollationHeader(big.NewInt(1), nil, big.NewInt(1), nil, []byte{})
	body := []byte{}
	transactions := []*types.Transaction{
		makeTxWithGasLimit(0),
		makeTxWithGasLimit(1),
		makeTxWithGasLimit(2),
		makeTxWithGasLimit(3),
	}

	collation := NewCollation(header, body, transactions)

	for i, tx := range collation.Transactions() {
		if tx.Hash().String() != transactions[i].Hash().String() {
			t.Errorf("initialized collation struct does not contain correct transactions")
		}
	}
}

func TestCollation_ProposerAddress(t *testing.T) {
	proposerAddr := common.StringToAddress("proposer")
	header := NewCollationHeader(big.NewInt(1), nil, big.NewInt(1), &proposerAddr, []byte{})
	body := []byte{}

	collation := NewCollation(header, body, nil)

	if collation.ProposerAddress().String() != proposerAddr.String() {
		t.Errorf("initialized collation does not contain correct proposer address")
	}
}

func makeTxWithGasLimit(gl uint64) *types.Transaction {
	return types.NewTransaction(0 /*nonce*/, common.HexToAddress("0x0") /*to*/, nil /*amount*/, gl, nil /*gasPrice*/, nil /*data*/)
}