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testing.go
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testing.go
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package state
import (
"math/big"
"testing"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
"github.com/0xPolygon/polygon-edge/types"
)
var (
addr1 = types.StringToAddress("1")
addr2 = types.StringToAddress("2")
hash0 = types.StringToHash("0")
hash1 = types.StringToHash("1")
hash2 = types.StringToHash("2")
defaultPreState = map[types.Address]*PreState{
addr1: {
State: map[types.Hash]types.Hash{
hash1: hash1,
},
},
}
)
// PreState is the account prestate
type PreState struct {
Nonce uint64
Balance uint64
State map[types.Hash]types.Hash
}
// PreStates is a set of pre states
type PreStates map[types.Address]*PreState
type buildPreState func(p PreStates) Snapshot
// TestState tests a set of tests on a state
func TestState(t *testing.T, buildPreState buildPreState) {
t.Helper()
t.Parallel()
t.Run("write state", func(t *testing.T) {
t.Parallel()
testWriteState(t, buildPreState)
})
t.Run("write empty state", func(t *testing.T) {
t.Parallel()
testWriteEmptyState(t, buildPreState)
})
t.Run("update state with empty - delete empty objects", func(t *testing.T) {
t.Parallel()
testUpdateStateWithEmpty(t, buildPreState, true)
})
t.Run("update state with empty - do not delete empty objects", func(t *testing.T) {
t.Parallel()
testUpdateStateWithEmpty(t, buildPreState, false)
})
t.Run("suicide account in pre-state", func(t *testing.T) {
t.Parallel()
testSuicideAccountInPreState(t, buildPreState)
})
t.Run("suicide account", func(t *testing.T) {
t.Parallel()
testSuicideAccount(t, buildPreState)
})
t.Run("suicide account with data", func(t *testing.T) {
t.Parallel()
testSuicideAccountWithData(t, buildPreState)
})
t.Run("suicide coinbase", func(t *testing.T) {
t.Parallel()
testSuicideCoinbase(t, buildPreState)
})
t.Run("suicide with intermediate commit", func(t *testing.T) {
t.Parallel()
testSuicideWithIntermediateCommit(t, buildPreState)
})
t.Run("restart refunds", func(t *testing.T) {
t.Parallel()
testRestartRefunds(t, buildPreState)
})
t.Run("change pre-state account balance to zero", func(t *testing.T) {
t.Parallel()
testChangePrestateAccountBalanceToZero(t, buildPreState)
})
t.Run("change account balance to zero", func(t *testing.T) {
t.Parallel()
testChangeAccountBalanceToZero(t, buildPreState)
})
t.Run("delete common state root", func(t *testing.T) {
t.Parallel()
testDeleteCommonStateRoot(t, buildPreState)
})
t.Run("get code empty code hash", func(t *testing.T) {
t.Parallel()
testGetCodeEmptyCodeHash(t, buildPreState)
})
t.Run("set and get code", func(t *testing.T) {
t.Parallel()
testSetAndGetCode(t, buildPreState)
})
}
func testDeleteCommonStateRoot(t *testing.T, buildPreState buildPreState) {
t.Helper()
snap := buildPreState(nil)
txn := newTxn(snap)
txn.SetNonce(addr1, 1)
txn.SetState(addr1, hash0, hash1)
txn.SetState(addr1, hash1, hash1)
txn.SetState(addr1, hash2, hash1)
txn.SetNonce(addr2, 1)
txn.SetState(addr2, hash0, hash1)
txn.SetState(addr2, hash1, hash1)
txn.SetState(addr2, hash2, hash1)
objs, err := txn.Commit(false)
require.NoError(t, err)
snap2, _, err := snap.Commit(objs)
require.NoError(t, err)
txn2 := newTxn(snap2)
txn2.SetState(addr1, hash0, hash0)
txn2.SetState(addr1, hash1, hash0)
objs, err = txn2.Commit(false)
require.NoError(t, err)
snap3, _, err := snap2.Commit(objs)
require.NoError(t, err)
txn3 := newTxn(snap3)
assert.Equal(t, hash1, txn3.GetState(addr1, hash2))
assert.Equal(t, hash1, txn3.GetState(addr2, hash0))
assert.Equal(t, hash1, txn3.GetState(addr2, hash1))
assert.Equal(t, hash1, txn3.GetState(addr2, hash2))
}
func testWriteState(t *testing.T, buildPreState buildPreState) {
t.Helper()
snap := buildPreState(nil)
txn := newTxn(snap)
txn.SetState(addr1, hash1, hash1)
txn.SetState(addr1, hash2, hash2)
assert.Equal(t, hash1, txn.GetState(addr1, hash1))
assert.Equal(t, hash2, txn.GetState(addr1, hash2))
objs, err := txn.Commit(false)
require.NoError(t, err)
snap, _, err = snap.Commit(objs)
require.NoError(t, err)
txn = newTxn(snap)
assert.Equal(t, hash1, txn.GetState(addr1, hash1))
assert.Equal(t, hash2, txn.GetState(addr1, hash2))
}
func testWriteEmptyState(t *testing.T, buildPreState buildPreState) {
t.Helper()
// Create account and write empty state
snap := buildPreState(nil)
txn := newTxn(snap)
// Without EIP150 the data is added
txn.SetState(addr1, hash1, hash0)
objs, err := txn.Commit(false)
require.NoError(t, err)
snap, _, err = snap.Commit(objs)
require.NoError(t, err)
txn = newTxn(snap)
assert.True(t, txn.Exist(addr1))
snap = buildPreState(nil)
txn = newTxn(snap)
// With EIP150 the empty data is removed
txn.SetState(addr1, hash1, hash0)
objs, err = txn.Commit(true)
require.NoError(t, err)
snap, _, err = snap.Commit(objs)
require.NoError(t, err)
txn = newTxn(snap)
assert.False(t, txn.Exist(addr1))
}
func testUpdateStateWithEmpty(t *testing.T, buildPreState buildPreState, deleteEmptyObjects bool) {
t.Helper()
// If the state (in prestate) is updated to empty it should be removed
snap := buildPreState(defaultPreState)
txn := newTxn(snap)
txn.SetState(addr1, hash1, hash0)
objs, err := txn.Commit(deleteEmptyObjects)
require.NoError(t, err)
snap, _, err = snap.Commit(objs)
require.NoError(t, err)
txn = newTxn(snap)
assert.Equal(t, !deleteEmptyObjects, txn.Exist(addr1))
// if balance is set, no matter what is passed to deleteEmptyObjects,
// addr1 should exist in state objects of txn
txn.SetBalance(addr1, big.NewInt(100))
objs, err = txn.Commit(deleteEmptyObjects)
require.NoError(t, err)
snap, _, err = snap.Commit(objs)
require.NoError(t, err)
txn = newTxn(snap)
assert.Equal(t, true, txn.Exist(addr1))
// if nonce is set, no matter what is passed to deleteEmptyObjects,
// addr1 should exist in state objects of txn
txn.SetBalance(addr1, big.NewInt(0))
txn.SetNonce(addr1, 1)
objs, err = txn.Commit(deleteEmptyObjects)
require.NoError(t, err)
snap, _, err = snap.Commit(objs)
require.NoError(t, err)
txn = newTxn(snap)
assert.Equal(t, true, txn.Exist(addr1))
}
func testSuicideAccountInPreState(t *testing.T, buildPreState buildPreState) {
t.Helper()
// Suicide an account created in the prestate
snap := buildPreState(defaultPreState)
txn := newTxn(snap)
txn.Suicide(addr1)
objs, err := txn.Commit(true)
require.NoError(t, err)
snap, _, err = snap.Commit(objs)
require.NoError(t, err)
txn = newTxn(snap)
assert.False(t, txn.Exist(addr1))
}
func testSuicideAccount(t *testing.T, buildPreState buildPreState) {
t.Helper()
// Create a new account and suicide it
snap := buildPreState(nil)
txn := newTxn(snap)
txn.SetState(addr1, hash1, hash1)
txn.Suicide(addr1)
// Note, even if has commit suicide it still exists in the current txn
assert.True(t, txn.Exist(addr1))
objs, err := txn.Commit(true)
require.NoError(t, err)
snap, _, err = snap.Commit(objs)
require.NoError(t, err)
txn = newTxn(snap)
assert.False(t, txn.Exist(addr1))
}
func testSuicideAccountWithData(t *testing.T, buildPreState buildPreState) {
t.Helper()
// Data (nonce, balance, code) from a suicided account should be empty
snap := buildPreState(nil)
txn := newTxn(snap)
code := []byte{0x1, 0x2, 0x3}
txn.SetNonce(addr1, 10)
txn.SetBalance(addr1, big.NewInt(100))
txn.SetCode(addr1, code)
txn.SetState(addr1, hash1, hash1)
txn.Suicide(addr1)
objs, err := txn.Commit(true)
require.NoError(t, err)
snap, _, err = snap.Commit(objs)
require.NoError(t, err)
txn = newTxn(snap)
assert.Equal(t, big.NewInt(0), txn.GetBalance(addr1))
assert.Equal(t, uint64(0), txn.GetNonce(addr1))
// code is not yet on the state
assert.Nil(t, txn.GetCode(addr1))
assert.Equal(t, (types.Hash{}), txn.GetCodeHash(addr1))
assert.Equal(t, int(0), txn.GetCodeSize(addr1))
assert.Equal(t, (types.Hash{}), txn.GetState(addr1, hash1))
}
func testSuicideCoinbase(t *testing.T, buildPreState buildPreState) {
t.Helper()
// Suicide the coinbase of the block
snap := buildPreState(defaultPreState)
txn := newTxn(snap)
txn.Suicide(addr1)
txn.AddSealingReward(addr1, big.NewInt(10))
objs, err := txn.Commit(true)
require.NoError(t, err)
snap, _, err = snap.Commit(objs)
require.NoError(t, err)
txn = newTxn(snap)
assert.Equal(t, big.NewInt(10), txn.GetBalance(addr1))
}
func testSuicideWithIntermediateCommit(t *testing.T, buildPreState buildPreState) {
t.Helper()
snap := buildPreState(defaultPreState)
txn := newTxn(snap)
txn.SetNonce(addr1, 10)
txn.Suicide(addr1)
assert.Equal(t, uint64(10), txn.GetNonce(addr1))
assert.NoError(t, txn.CleanDeleteObjects(true))
assert.Equal(t, uint64(0), txn.GetNonce(addr1))
_, err := txn.Commit(true)
assert.NoError(t, err)
assert.Equal(t, uint64(0), txn.GetNonce(addr1))
}
func testRestartRefunds(t *testing.T, buildPreState buildPreState) {
t.Helper()
// refunds are only valid per single txn so after each
// intermediateCommit they have to be restarted
snap := buildPreState(nil)
txn := newTxn(snap)
txn.AddRefund(1000)
assert.Equal(t, uint64(1000), txn.GetRefund())
_, err := txn.Commit(false)
assert.NoError(t, err)
// refund should be empty after the commit
assert.Equal(t, uint64(0), txn.GetRefund())
}
func testChangePrestateAccountBalanceToZero(t *testing.T, buildPreState buildPreState) {
t.Helper()
// If the balance of the account changes to zero the account is deleted
preState := map[types.Address]*PreState{
addr1: {
Balance: 10,
},
}
snap := buildPreState(preState)
txn := newTxn(snap)
txn.SetBalance(addr1, big.NewInt(0))
objs, err := txn.Commit(true)
require.NoError(t, err)
snap, _, err = snap.Commit(objs)
require.NoError(t, err)
txn = newTxn(snap)
assert.False(t, txn.Exist(addr1))
}
func testChangeAccountBalanceToZero(t *testing.T, buildPreState buildPreState) {
t.Helper()
// If the balance of the account changes to zero the account is deleted
snap := buildPreState(nil)
txn := newTxn(snap)
txn.SetBalance(addr1, big.NewInt(10))
txn.SetBalance(addr1, big.NewInt(0))
objs, err := txn.Commit(true)
require.NoError(t, err)
snap, _, err = snap.Commit(objs)
require.NoError(t, err)
txn = newTxn(snap)
assert.False(t, txn.Exist(addr1))
}
func testGetCodeEmptyCodeHash(t *testing.T, buildPreState buildPreState) {
t.Helper()
// If empty code hash is passed, it is considered as a valid case,
// and in that case we are not retrieving it from the storage.
snap := buildPreState(nil)
code, ok := snap.GetCode(types.EmptyCodeHash)
assert.True(t, ok)
assert.Empty(t, code)
}
func testSetAndGetCode(t *testing.T, buildPreState buildPreState) {
t.Helper()
testCode := []byte{0x2, 0x4, 0x6, 0x8}
snap := buildPreState(nil)
txn := newTxn(snap)
txn.SetCode(addr1, testCode)
affectedObjs, err := txn.Commit(true)
require.NoError(t, err)
snap, _, err = snap.Commit(affectedObjs)
require.NoError(t, err)
assert.Len(t, affectedObjs, 1)
code, ok := snap.GetCode(affectedObjs[0].CodeHash)
assert.True(t, ok)
assert.Equal(t, testCode, code)
}