Extract Files seam, WebDAV, and Visit from CheckDNS.

Publish go-nc-files v1 with local/WebDAV Root, DefaultPathStore, and
neutral Working Folder language; depends on go-nc-exapp v0.1.0.

Co-authored-by: Cursor <cursoragent@cursor.com>

visit_test.go

@@ -0,0 +1,137 @@
+package goncfiles_test
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	"gitea.neitzel.de/konrad/go-nc-files"
+)
+
+const testInitialFolder = "myapp"
+
+func TestAppIconLaunchCreatesInitialFolder(t *testing.T) {
+	t.Parallel()
+	root := t.TempDir()
+	settings := filepath.Join(t.TempDir(), "settings.json")
+
+	visit, err := goncfiles.OpenLocal(root, settings, testInitialFolder, "")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if visit.SavedDefault != testInitialFolder {
+		t.Fatalf("saved: %s", visit.SavedDefault)
+	}
+	info, err := os.Stat(filepath.Join(root, testInitialFolder))
+	if err != nil || !info.IsDir() {
+		t.Fatalf("initial folder: %v", err)
+	}
+	if visit.WorkingDir() != filepath.Join(root, testInitialFolder) {
+		t.Fatalf("working: %s", visit.WorkingDir())
+	}
+}
+
+func TestSetDefaultPersistsAndDoesNotNeedVisitFolder(t *testing.T) {
+	t.Parallel()
+	root := t.TempDir()
+	settings := filepath.Join(t.TempDir(), "settings.json")
+	if err := os.Mkdir(filepath.Join(root, "Zones"), 0o755); err != nil {
+		t.Fatal(err)
+	}
+
+	visit, err := goncfiles.OpenLocal(root, settings, testInitialFolder, "")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if err := visit.SetDefault("Zones"); err != nil {
+		t.Fatal(err)
+	}
+
+	again, err := goncfiles.OpenLocal(root, settings, testInitialFolder, "")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if again.SavedDefault != "Zones" {
+		t.Fatalf("saved: %s", again.SavedDefault)
+	}
+	if again.WorkingDir() != filepath.Join(root, "Zones") {
+		t.Fatalf("working: %s", again.WorkingDir())
+	}
+}
+
+func TestFilesViewLaunchDoesNotChangeSavedDefault(t *testing.T) {
+	t.Parallel()
+	root := t.TempDir()
+	settings := filepath.Join(t.TempDir(), "settings.json")
+	share := filepath.Join(root, "Shared", "TeamDNS")
+	if err := os.MkdirAll(share, 0o755); err != nil {
+		t.Fatal(err)
+	}
+
+	visit, err := goncfiles.OpenLocal(root, settings, testInitialFolder, "Shared/TeamDNS")
+	if err != nil {
+		t.Fatal(err)
+	}
+	if visit.SavedDefault != testInitialFolder {
+		t.Fatalf("saved default must stay %s, got %s", testInitialFolder, visit.SavedDefault)
+	}
+	if visit.WorkingDir() != share {
+		t.Fatalf("visit working: %s", visit.WorkingDir())
+	}
+	if _, err := os.Stat(filepath.Join(root, testInitialFolder)); err == nil {
+		t.Fatal("files-view launch must not create the initial folder")
+	}
+}
+
+func TestFilesViewMissingFolderFailsClosed(t *testing.T) {
+	t.Parallel()
+	root := t.TempDir()
+	settings := filepath.Join(t.TempDir(), "settings.json")
+
+	_, err := goncfiles.OpenLocal(root, settings, testInitialFolder, "Missing/Folder")
+	if err == nil {
+		t.Fatal("expected error")
+	}
+	if !goncfiles.IsNotExist(err) {
+		t.Fatalf("want ErrNotExist, got %v", err)
+	}
+	if _, err := os.Stat(filepath.Join(root, "Missing")); err == nil {
+		t.Fatal("must not create the visit path")
+	}
+	if _, err := os.Stat(filepath.Join(root, testInitialFolder)); err == nil {
+		t.Fatal("must not fall back to creating initial folder")
+	}
+}
+
+func TestFileStorePersistsDefaultPath(t *testing.T) {
+	t.Parallel()
+	path := filepath.Join(t.TempDir(), "settings.json")
+	store := goncfiles.FileStore{Path: path}
+	if err := store.SetDefault("Zones"); err != nil {
+		t.Fatal(err)
+	}
+	got, err := store.GetDefault()
+	if err != nil || got != "Zones" {
+		t.Fatalf("got %q err=%v", got, err)
+	}
+	body, err := os.ReadFile(path)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if !strings.Contains(string(body), `"defaultPath"`) {
+		t.Fatalf("expected defaultPath key in %s", body)
+	}
+}
+
+func TestMemoryStore(t *testing.T) {
+	t.Parallel()
+	var m goncfiles.Memory
+	if err := m.SetDefault("a"); err != nil {
+		t.Fatal(err)
+	}
+	got, err := m.GetDefault()
+	if err != nil || got != "a" {
+		t.Fatalf("got %q err=%v", got, err)
+	}
+}