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package l2
import (
"math/rand"
"testing"
"github.com/ethereum-optimism/optimism/op-program/client/l2/test"
"github.com/ethereum-optimism/optimism/op-service/eth"
"github.com/ethereum-optimism/optimism/op-service/testutils"
"github.com/ethereum/go-ethereum/common"
"github.com/stretchr/testify/require"
)
// Should be an Oracle implementation
var _ Oracle = (*CachingOracle)(nil)
func TestBlockByHash(t *testing.T) {
stub, _ := test.NewStubOracle(t)
oracle := NewCachingOracle(stub)
rng := rand.New(rand.NewSource(1))
block, _ := testutils.RandomBlock(rng, 1)
// Initial call retrieves from the stub
stub.Blocks[block.Hash()] = block
actual := oracle.BlockByHash(block.Hash())
require.Equal(t, block, actual)
// Later calls should retrieve from cache
delete(stub.Blocks, block.Hash())
actual = oracle.BlockByHash(block.Hash())
require.Equal(t, block, actual)
}
func TestNodeByHash(t *testing.T) {
stub, stateStub := test.NewStubOracle(t)
oracle := NewCachingOracle(stub)
node := []byte{12, 3, 4}
hash := common.Hash{0xaa}
// Initial call retrieves from the stub
stateStub.Data[hash] = node
actual := oracle.NodeByHash(hash)
require.Equal(t, node, actual)
// Later calls should retrieve from cache
delete(stateStub.Data, hash)
actual = oracle.NodeByHash(hash)
require.Equal(t, node, actual)
}
func TestCodeByHash(t *testing.T) {
stub, stateStub := test.NewStubOracle(t)
oracle := NewCachingOracle(stub)
node := []byte{12, 3, 4}
hash := common.Hash{0xaa}
// Initial call retrieves from the stub
stateStub.Code[hash] = node
actual := oracle.CodeByHash(hash)
require.Equal(t, node, actual)
// Later calls should retrieve from cache
delete(stateStub.Code, hash)
actual = oracle.CodeByHash(hash)
require.Equal(t, node, actual)
}
func TestOutputByRoot(t *testing.T) {
stub, _ := test.NewStubOracle(t)
oracle := NewCachingOracle(stub)
rng := rand.New(rand.NewSource(1))
output := testutils.RandomOutputV0(rng)
// Initial call retrieves from the stub
root := common.Hash(eth.OutputRoot(output))
stub.Outputs[root] = output
actual := oracle.OutputByRoot(root)
require.Equal(t, output, actual)
// Later calls should retrieve from cache
delete(stub.Outputs, root)
actual = oracle.OutputByRoot(root)
require.Equal(t, output, actual)
}