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package sync
import (
"context"
"io"
"net/http"
"net/http/httptest"
"os"
"path/filepath"
"testing"
"github.com/ethereum-optimism/optimism/op-service/eth"
"github.com/stretchr/testify/require"
)
func TestSyncBasic(t *testing.T) {
serverRoot, clientRoot := setupTest(t)
chainID := eth.ChainID{1}
// Create a test file on the server
serverFile := filepath.Join(serverRoot, chainID.String(), DBLocalSafe.File())
createTestFile(t, serverFile, 1024)
// Setup server
serverCfg := Config{
DataDir: serverRoot,
}
server, err := NewServer(serverCfg, []eth.ChainID{chainID})
require.NoError(t, err)
ts := httptest.NewServer(server)
defer ts.Close()
// Setup client
clientCfg := Config{
DataDir: clientRoot,
}
client, err := NewClient(clientCfg, ts.URL)
require.NoError(t, err)
// Perform sync
err = client.SyncDatabase(context.Background(), chainID, DBLocalSafe, false)
require.NoError(t, err)
compareFiles(t, serverFile, filepath.Join(clientRoot, chainID.String(), DBLocalSafe.File()))
}
func TestSyncResume(t *testing.T) {
serverRoot, clientRoot := setupTest(t)
chainID := eth.ChainID{1} // Use chain ID 1 for testing
// Create a test file on the server and partial file on the client
serverFile := filepath.Join(serverRoot, chainID.String(), DBLocalSafe.File())
createTestFile(t, serverFile, 2*1024) // 2KB file
clientFile := filepath.Join(clientRoot, chainID.String(), DBLocalSafe.File())
createTestFile(t, clientFile, 1024) // 1KB partial file
// Setup server and client
serverCfg := Config{
DataDir: serverRoot,
}
server, err := NewServer(serverCfg, []eth.ChainID{chainID})
require.NoError(t, err)
ts := httptest.NewServer(server)
defer ts.Close()
clientCfg := Config{
DataDir: clientRoot,
}
client, err := NewClient(clientCfg, ts.URL)
require.NoError(t, err)
// Perform sync
err = client.SyncDatabase(context.Background(), chainID, DBLocalSafe, true)
require.NoError(t, err)
compareFiles(t, serverFile, clientFile)
}
func TestSyncRetry(t *testing.T) {
serverRoot, clientRoot := setupTest(t)
chainID := eth.ChainID{1}
// Create a test file
serverFile := filepath.Join(serverRoot, chainID.String(), DBLocalSafe.File())
createTestFile(t, serverFile, 1024)
// Setup server with flaky handler that fails twice before succeeding
serverCfg := Config{
DataDir: serverRoot,
}
server, err := NewServer(serverCfg, []eth.ChainID{chainID})
require.NoError(t, err)
failureCount := 0
handler := http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
if failureCount < 2 {
failureCount++
w.WriteHeader(http.StatusInternalServerError)
return
}
server.ServeHTTP(w, r)
})
ts := httptest.NewServer(handler)
defer ts.Close()
clientCfg := Config{
DataDir: clientRoot,
}
client, err := NewClient(clientCfg, ts.URL)
require.NoError(t, err)
// Perform sync
err = client.SyncDatabase(context.Background(), chainID, DBLocalSafe, false)
require.NoError(t, err)
require.Equal(t, 2, failureCount, "expected exactly 2 failures")
compareFiles(t, serverFile, filepath.Join(clientRoot, chainID.String(), DBLocalSafe.File()))
}
func TestSyncErrors(t *testing.T) {
serverRoot, clientRoot := setupTest(t)
chainID := eth.ChainID{1}
serverCfg := Config{
DataDir: serverRoot,
}
server, err := NewServer(serverCfg, []eth.ChainID{chainID})
require.NoError(t, err)
ts := httptest.NewServer(server)
defer ts.Close()
clientCfg := Config{
DataDir: clientRoot,
}
client, err := NewClient(clientCfg, ts.URL)
require.NoError(t, err)
t.Run("NonexistentFile", func(t *testing.T) {
err := client.SyncDatabase(context.Background(), chainID, "nonexistent", false)
require.Error(t, err)
})
t.Run("CancelledContext", func(t *testing.T) {
ctx, cancel := context.WithCancel(context.Background())
cancel() // Cancel immediately
err := client.SyncDatabase(ctx, chainID, DBLocalSafe, false)
require.ErrorIs(t, err, context.Canceled)
})
}
// setupTest creates test directories and test files
func setupTest(t *testing.T) (serverRoot, clientRoot string) {
return t.TempDir(), t.TempDir()
}
// createTestFile creates a file with given size and content
func createTestFile(t *testing.T, path string, size int64) {
t.Helper()
err := os.MkdirAll(filepath.Dir(path), 0755)
require.NoError(t, err)
f, err := os.Create(path)
require.NoError(t, err)
defer f.Close()
// Create deterministic content for testing; ASCII A-Za-z0-9
data := make([]byte, 1024)
for i := range data {
data[i] = byte((i % 62) + 65)
}
// Write the test data over and over until the desired size is reached
var written int64
for written < size {
toWrite := size - written
if toWrite > int64(len(data)) {
toWrite = int64(len(data))
}
n, err := f.Write(data[:toWrite])
require.NoError(t, err)
written += int64(n)
}
}
// compareFiles verifies two files are identical
func compareFiles(t *testing.T, path1, path2 string) {
file1, err := os.Open(path1)
require.NoError(t, err)
content1, err := io.ReadAll(file1)
require.NoError(t, err)
require.NoError(t, file1.Close())
file2, err := os.Open(path2)
require.NoError(t, err)
content2, err := io.ReadAll(file2)
require.NoError(t, err)
require.NoError(t, file2.Close())
require.Equal(t, content1, content2)
}