helloworld_test.go

package main

import (
	"math/big"
	"testing"

	"github.com/ethereum/go-ethereum/accounts/abi/bind"
	"github.com/ethereum/go-ethereum/accounts/abi/bind/backends"
	"github.com/ethereum/go-ethereum/common"
	"github.com/ethereum/go-ethereum/core"
	"github.com/ethereum/go-ethereum/crypto"
	"github.com/stretchr/testify/suite"
)

type HelloworldTestSuite struct {
	suite.Suite
	auth       *bind.TransactOpts
	address    common.Address
	gAlloc     core.GenesisAlloc
	sim        *backends.SimulatedBackend
	helloworld *Helloworld
}

func TestRunHelloworldSuite(t *testing.T) {
	suite.Run(t, new(HelloworldTestSuite))
}

func (s *HelloworldTestSuite) SetupTest() {
	key, _ := crypto.GenerateKey()
	s.auth = bind.NewKeyedTransactor(key)

	s.address = s.auth.From
	s.gAlloc = map[common.Address]core.GenesisAccount{
		s.address: {Balance: big.NewInt(10000000000)},
	}

	s.sim = backends.NewSimulatedBackend(s.gAlloc)

	_, _, hw, e := DeployHelloworld(s.auth, s.sim)
	s.helloworld = hw
	s.Nil(e)
	s.sim.Commit()
}

func (s *HelloworldTestSuite) TestSay() {
	str, err := s.helloworld.Say(nil)
	s.Equal("hello etherworld", str)
	s.Nil(err)
}