all: Correct various typos (#8870)

test/parallel_scan_test.go

@@ -0,0 +1,66 @@
+// Copyright (C) 2014 The Syncthing Authors.
+//
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this file,
+// You can obtain one at https://mozilla.org/MPL/2.0/.
+
+//go:build integration
+// +build integration
+
+package integration
+
+import (
+	"log"
+	"os"
+	"sync"
+	"testing"
+	"time"
+)
+
+func TestRescanInParallel(t *testing.T) {
+	log.Println("Cleaning...")
+	err := removeAll("s1", "h1/index*")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	log.Println("Generating files...")
+	err = generateFiles("s1", 5000, 18, "../LICENSE")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	log.Println("Generating .stignore...")
+	err = os.WriteFile("s1/.stignore", []byte("some ignore data\n"), 0644)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	st := startInstance(t, 1)
+	defer checkedStop(t, st)
+
+	var wg sync.WaitGroup
+	log.Println("Starting scans...")
+	for j := 0; j < 20; j++ {
+		j := j
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+			err := st.Rescan("default")
+			log.Println(j)
+			if err != nil {
+				log.Println(err)
+				t.Fatal(err)
+			}
+		}()
+	}
+
+	wg.Wait()
+	log.Println("Scans done")
+	time.Sleep(2 * time.Second)
+
+	// This is where the real test is currently, since stop() checks for data
+	// race output in the log.
+	log.Println("Stopping...")
+	checkedStop(t, st)
+}