Update reset API to reflect new use cases.

/rest/reset clears the entire Syncthing DB and restart the program
/rest/reset&folder=default clears the indexes of the default folder

test/reset_test.go

@@ -0,0 +1,175 @@
+// 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 http://mozilla.org/MPL/2.0/.
+
+// +build integration
+
+package integration
+
+import (
+	"log"
+	"os"
+	"path/filepath"
+	"testing"
+	"time"
+)
+
+func TestReset(t *testing.T) {
+	// Clean and start a syncthing instance
+
+	log.Println("Cleaning...")
+	err := removeAll("s1", "h1/index*")
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	p := syncthingProcess{ // id1
+		instance: "1",
+		argv:     []string{"-home", "h1"},
+		port:     8081,
+		apiKey:   apiKey,
+	}
+	err = p.start()
+	if err != nil {
+		t.Fatal(err)
+	}
+	defer p.stop()
+
+	// Wait for one scan to succeed, or up to 20 seconds... This is to let
+	// startup, UPnP etc complete and make sure that we've performed folder
+	// error checking which creates the folder path if it's missing.
+	log.Println("Starting...")
+	waitForScan(t, &p)
+
+	log.Println("Creating files...")
+	size := createFiles(t)
+
+	log.Println("Scanning files...")
+	waitForScan(t, &p)
+
+	m, err := p.model("default")
+	if err != nil {
+		t.Fatal(err)
+	}
+	expected := size
+	if m.LocalFiles != expected {
+		t.Fatalf("Incorrect number of files after initial scan, %d != %d", m.LocalFiles, expected)
+	}
+
+	// Clear all files but restore the folder marker
+	log.Println("Cleaning...")
+	err = removeAll("s1/*", "h1/index*")
+	if err != nil {
+		t.Fatal(err)
+	}
+	os.Create("s1/.stfolder")
+
+	// Reset indexes of an invalid folder
+	log.Println("Reset invalid folder")
+	err = p.reset("invalid")
+	if err == nil {
+		t.Fatalf("Cannot reset indexes of an invalid folder")
+	}
+	m, err = p.model("default")
+	if err != nil {
+		t.Fatal(err)
+	}
+	expected = size
+	if m.LocalFiles != expected {
+		t.Fatalf("Incorrect number of files after initial scan, %d != %d", m.LocalFiles, expected)
+	}
+
+	// Reset indexes of the default folder
+	log.Println("Reset indexes of default folder")
+	err = p.reset("default")
+	if err != nil {
+		t.Fatal("Failed to reset indexes of the default folder:", err)
+	}
+
+	// Wait for ST and scan
+	p.start()
+	waitForScan(t, &p)
+
+	// Verify that we see them
+	m, err = p.model("default")
+	if err != nil {
+		t.Fatal(err)
+	}
+	expected = 0
+	if m.LocalFiles != expected {
+		t.Fatalf("Incorrect number of files after initial scan, %d != %d", m.LocalFiles, expected)
+	}
+
+	// Recreate the files and scan
+	log.Println("Creating files...")
+	size = createFiles(t)
+	waitForScan(t, &p)
+
+	// Verify that we see them
+	m, err = p.model("default")
+	if err != nil {
+		t.Fatal(err)
+	}
+	expected = size
+	if m.LocalFiles != expected {
+		t.Fatalf("Incorrect number of files after second creation phase, %d != %d", m.LocalFiles, expected)
+	}
+
+	// Reset all indexes
+	log.Println("Reset DB...")
+	err = p.reset("")
+	if err != nil {
+		t.Fatalf("Failed to reset indexes", err)
+	}
+
+	// Wait for ST and scan
+	p.start()
+	waitForScan(t, &p)
+
+	m, err = p.model("default")
+	if err != nil {
+		t.Fatal(err)
+	}
+	expected = size
+	if m.LocalFiles != expected {
+		t.Fatalf("Incorrect number of files after initial scan, %d != %d", m.LocalFiles, expected)
+	}
+}
+
+func waitForScan(t *testing.T, p *syncthingProcess) {
+	// Wait for one scan to succeed, or up to 20 seconds...
+	for i := 0; i < 20; i++ {
+		err := p.rescan("default")
+		if err != nil {
+			time.Sleep(time.Second)
+			continue
+		}
+		break
+	}
+}
+
+func createFiles(t *testing.T) int {
+	// Create eight empty files and directories
+	files := []string{"f1", "f2", "f3", "f4", "f11", "f12", "f13", "f14"}
+	dirs := []string{"d1", "d2", "d3", "d4", "d11", "d12", "d13", "d14"}
+	all := append(files, dirs...)
+
+	for _, file := range files {
+		fd, err := os.Create(filepath.Join("s1", file))
+		if err != nil {
+			t.Fatal(err)
+		}
+		fd.Close()
+	}
+
+	for _, dir := range dirs {
+		err := os.Mkdir(filepath.Join("s1", dir), 0755)
+		if err != nil {
+			t.Fatal(err)
+		}
+	}
+
+	return len(all)
+}