From 58c898c2c14c27ae5f8ecbf6b3269c563535f16e Mon Sep 17 00:00:00 2001
From: Alexey Palazhchenko <alexey.palazhchenko@ferretdb.io>
Date: Fri, 18 Aug 2023 00:24:41 +0400
Subject: [PATCH] Fix concurrent SQLite tests (#3222)

Closes #3172.
---
 integration/setup/listener.go | 31 ++++++++++++++++++++++++++++++-
 integration/setup/startup.go  | 17 -----------------
 internal/util/testutil/db.go  |  4 ----
 3 files changed, 30 insertions(+), 22 deletions(-)

diff --git a/integration/setup/listener.go b/integration/setup/listener.go
index f361848d53eb..13bcf3305e4b 100644
--- a/integration/setup/listener.go
+++ b/integration/setup/listener.go
@@ -19,6 +19,7 @@ import (
 	"errors"
 	"net/url"
 	"os"
+	"path"
 	"path/filepath"
 
 	"github.com/stretchr/testify/require"
@@ -29,6 +30,7 @@ import (
 	"github.com/FerretDB/FerretDB/internal/handlers/registry"
 	"github.com/FerretDB/FerretDB/internal/util/observability"
 	"github.com/FerretDB/FerretDB/internal/util/state"
+	"github.com/FerretDB/FerretDB/internal/util/testutil"
 	"github.com/FerretDB/FerretDB/internal/util/testutil/testtb"
 )
 
@@ -131,6 +133,33 @@ func setupListener(tb testtb.TB, ctx context.Context, logger *zap.Logger) string
 		panic("not reached")
 	}
 
+	// use per-test directory to prevent handler's/backend's metadata registry
+	// read databases owned by concurrent tests
+	sqliteURL := *sqliteURLF
+	if sqliteURL != "" {
+		u, err := url.Parse(sqliteURL)
+		require.NoError(tb, err)
+
+		require.True(tb, u.Path == "")
+		require.True(tb, u.Opaque != "")
+
+		u.Opaque = path.Join(u.Opaque, testutil.DatabaseName(tb)) + "/"
+		sqliteURL = u.String()
+
+		dir, err := filepath.Abs(u.Opaque)
+		require.NoError(tb, err)
+		require.NoError(tb, os.MkdirAll(dir, 0o777))
+
+		tb.Cleanup(func() {
+			if tb.Failed() {
+				tb.Logf("Keeping %s (%s) for debugging.", dir, sqliteURL)
+				return
+			}
+
+			require.NoError(tb, os.RemoveAll(dir))
+		})
+	}
+
 	p, err := state.NewProvider("")
 	require.NoError(tb, err)
 
@@ -140,7 +169,7 @@ func setupListener(tb testtb.TB, ctx context.Context, logger *zap.Logger) string
 		StateProvider: p,
 
 		PostgreSQLURL: *postgreSQLURLF,
-		SQLiteURL:     *sqliteURLF,
+		SQLiteURL:     sqliteURL,
 		HANAURL:       *hanaURLF,
 
 		TestOpts: registry.TestOpts{
diff --git a/integration/setup/startup.go b/integration/setup/startup.go
index 8804b454f4da..05c8b05d66a9 100644
--- a/integration/setup/startup.go
+++ b/integration/setup/startup.go
@@ -17,9 +17,7 @@ package setup
 import (
 	"context"
 	"net/http"
-	"net/url"
 	"os"
-	"path/filepath"
 	"runtime"
 	"time"
 
@@ -79,21 +77,6 @@ func Startup() {
 		zap.S().Fatalf("Unknown target backend %q.", *targetBackendF)
 	}
 
-	if *sqliteURLF != "" {
-		u, err := url.Parse(*sqliteURLF)
-		if err != nil {
-			zap.S().Fatalf("Failed to parse -sqlite-url %s: %s", u, err)
-		}
-
-		must.BeTrue(u.Path == "")
-		must.BeTrue(u.Opaque != "")
-
-		dir := must.NotFail(filepath.Abs(u.Opaque))
-		zap.S().Infof("Recreating %s", dir)
-		_ = os.Remove(dir)
-		must.NoError(os.MkdirAll(dir, 0o777))
-	}
-
 	if u := *targetURLF; u != "" {
 		client, err := makeClient(ctx, u)
 		if err != nil {
diff --git a/internal/util/testutil/db.go b/internal/util/testutil/db.go
index 371004362263..2b04e3648df1 100644
--- a/internal/util/testutil/db.go
+++ b/internal/util/testutil/db.go
@@ -33,8 +33,6 @@ var (
 )
 
 // DatabaseName returns a stable FerretDB database name for that test.
-//
-// It should be called only once per test.
 func DatabaseName(tb testtb.TB) string {
 	tb.Helper()
 
@@ -61,8 +59,6 @@ func DatabaseName(tb testtb.TB) string {
 }
 
 // CollectionName returns a stable FerretDB collection name for that test.
-//
-// It should be called only once per test.
 func CollectionName(tb testtb.TB) string {
 	tb.Helper()