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package integration_tests
import (
"bytes"
"fmt"
"github.com/alicebob/miniredis"
"github.com/ethereum-optimism/optimism/go/proxyd"
"github.com/stretchr/testify/require"
"os"
"testing"
"time"
)
func TestCaching(t *testing.T) {
redis, err := miniredis.Run()
require.NoError(t, err)
defer redis.Close()
hdlr := NewRPCResponseHandler(map[string]interface{}{
"eth_chainId": "0x420",
"net_version": "0x1234",
"eth_blockNumber": "0x64",
"eth_getBlockByNumber": "dummy_block",
"eth_call": "dummy_call",
})
backend := NewMockBackend(hdlr)
defer backend.Close()
require.NoError(t, os.Setenv("GOOD_BACKEND_RPC_URL", backend.URL()))
require.NoError(t, os.Setenv("REDIS_URL", fmt.Sprintf("redis://127.0.0.1:%s", redis.Port())))
config := ReadConfig("caching")
client := NewProxydClient("http://127.0.0.1:8545")
shutdown, err := proxyd.Start(config)
require.NoError(t, err)
defer shutdown()
// allow time for the block number fetcher to fire
time.Sleep(1500 * time.Millisecond)
tests := []struct {
method string
params []interface{}
response string
backendCalls int
}{
{
"eth_chainId",
nil,
"{\"jsonrpc\": \"2.0\", \"result\": \"0x420\", \"id\": 999}",
1,
},
{
"net_version",
nil,
"{\"jsonrpc\": \"2.0\", \"result\": \"0x1234\", \"id\": 999}",
1,
},
{
"eth_getBlockByNumber",
[]interface{}{
"0x1",
true,
},
"{\"jsonrpc\": \"2.0\", \"result\": \"dummy_block\", \"id\": 999}",
1,
},
{
"eth_call",
[]interface{}{
struct {
To string `json:"to"`
}{
"0x1234",
},
"0x60",
},
"{\"id\":999,\"jsonrpc\":\"2.0\",\"result\":\"dummy_call\"}",
1,
},
{
"eth_blockNumber",
nil,
"{\"id\":999,\"jsonrpc\":\"2.0\",\"result\":\"0x64\"}",
0,
},
{
"eth_call",
[]interface{}{
struct {
To string `json:"to"`
}{
"0x1234",
},
"latest",
},
"{\"id\":999,\"jsonrpc\":\"2.0\",\"result\":\"dummy_call\"}",
2,
},
{
"eth_call",
[]interface{}{
struct {
To string `json:"to"`
}{
"0x1234",
},
"pending",
},
"{\"id\":999,\"jsonrpc\":\"2.0\",\"result\":\"dummy_call\"}",
2,
},
}
for _, tt := range tests {
t.Run(tt.method, func(t *testing.T) {
resRaw, _, err := client.SendRPC(tt.method, tt.params)
require.NoError(t, err)
resCache, _, err := client.SendRPC(tt.method, tt.params)
require.NoError(t, err)
RequireEqualJSON(t, []byte(tt.response), resCache)
RequireEqualJSON(t, resRaw, resCache)
require.Equal(t, tt.backendCalls, countRequests(backend, tt.method))
backend.Reset()
})
}
t.Run("block numbers update", func(t *testing.T) {
hdlr.SetResponse("eth_blockNumber", "0x100")
time.Sleep(1500 * time.Millisecond)
resRaw, _, err := client.SendRPC("eth_blockNumber", nil)
require.NoError(t, err)
RequireEqualJSON(t, []byte("{\"id\":999,\"jsonrpc\":\"2.0\",\"result\":\"0x100\"}"), resRaw)
backend.Reset()
})
t.Run("nil responses should not be cached", func(t *testing.T) {
hdlr.SetResponse("eth_getBlockByNumber", nil)
resRaw, _, err := client.SendRPC("eth_getBlockByNumber", []interface{}{"0x123"})
require.NoError(t, err)
resCache, _, err := client.SendRPC("eth_getBlockByNumber", []interface{}{"0x123"})
require.NoError(t, err)
RequireEqualJSON(t, []byte("{\"id\":999,\"jsonrpc\":\"2.0\",\"result\":null}"), resRaw)
RequireEqualJSON(t, resRaw, resCache)
require.Equal(t, 2, countRequests(backend, "eth_getBlockByNumber"))
})
}
func countRequests(backend *MockBackend, name string) int {
var count int
for _, req := range backend.Requests() {
if bytes.Contains(req.Body, []byte(name)) {
count++
}
}
return count
}