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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 TestSuite struct { | |
suite.Suite // Designates this struct as a test suite | |
auth *bind.TransactOpts | |
address common.Address | |
gAlloc core.GenesisAlloc | |
sim *backends.SimulatedBackend | |
instance *Helloworld // Instance of our contract as a go object | |
} | |
func TestRunHelloworldSuite(t *testing.T) { | |
suite.Run(t, new(TestSuite)) | |
} | |
func (s *TestSuite) SetupTest() { | |
// We don't need a Wallet/account specific key, just a general ecdsa one. | |
key, _ := crypto.GenerateKey() | |
// Create new keyed transactor | |
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) | |
ver := "1.0" | |
// Run the Deploy<contract_name>(auth *bind.TransactOpts, backend bind.ContractBackend, _version string) | |
// Returns a contractAddress common.Address, tx *types.Transaction | |
// (which we discard because we don't need to locate this on our simulated blockchain) | |
// a contract instance, and an error, which we check with Testify using s.Nil(err) | |
_, _, instance, err := DerrployHelloworld(s.auth, s.sim, ver) | |
// We assign the contract instance returned to s.instance so we can interact with it | |
// with the rest of our tests | |
s.instance = instance | |
s.Nil(err) | |
// Creates a block on our simulated blockchain | |
s.sim.Commit() | |
} | |
// TestSay tests the Say() contract function | |
func (s *TestSuite) TestSay() { | |
str, err := s.instance.Say(nil) | |
s.Equal("hello etherworld", str) | |
s.Nil(err) | |
} |
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