Add scheduled rotating local backups

internal/appstate/backup_test.go

@@ -0,0 +1,83 @@
+package appstate
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+	"time"
+)
+
+func TestEnsureRotatingLocalBackupCreatesAndRotates(t *testing.T) {
+	temp := t.TempDir()
+	dbPath := filepath.Join(temp, "qfs.db")
+	cfgPath := filepath.Join(temp, "config.yaml")
+
+	if err := os.WriteFile(dbPath, []byte("db"), 0644); err != nil {
+		t.Fatalf("write db: %v", err)
+	}
+	if err := os.WriteFile(cfgPath, []byte("cfg"), 0644); err != nil {
+		t.Fatalf("write config: %v", err)
+	}
+
+	prevNow := backupNow
+	defer func() { backupNow = prevNow }()
+	backupNow = func() time.Time { return time.Date(2026, 2, 11, 10, 0, 0, 0, time.UTC) }
+
+	created, err := EnsureRotatingLocalBackup(dbPath, cfgPath)
+	if err != nil {
+		t.Fatalf("backup: %v", err)
+	}
+	if len(created) == 0 {
+		t.Fatalf("expected backup to be created")
+	}
+
+	dailyArchive := filepath.Join(temp, "backups", "daily", "qfs-backp-2026-02-11.zip")
+	if _, err := os.Stat(dailyArchive); err != nil {
+		t.Fatalf("daily archive missing: %v", err)
+	}
+
+	backupNow = func() time.Time { return time.Date(2026, 2, 12, 10, 0, 0, 0, time.UTC) }
+	created, err = EnsureRotatingLocalBackup(dbPath, cfgPath)
+	if err != nil {
+		t.Fatalf("backup rotate: %v", err)
+	}
+	if len(created) == 0 {
+		t.Fatalf("expected backup to be created for new day")
+	}
+
+	dailyArchive = filepath.Join(temp, "backups", "daily", "qfs-backp-2026-02-12.zip")
+	if _, err := os.Stat(dailyArchive); err != nil {
+		t.Fatalf("daily archive missing after rotate: %v", err)
+	}
+}
+
+func TestEnsureRotatingLocalBackupEnvControls(t *testing.T) {
+	temp := t.TempDir()
+	dbPath := filepath.Join(temp, "qfs.db")
+	cfgPath := filepath.Join(temp, "config.yaml")
+
+	if err := os.WriteFile(dbPath, []byte("db"), 0644); err != nil {
+		t.Fatalf("write db: %v", err)
+	}
+	if err := os.WriteFile(cfgPath, []byte("cfg"), 0644); err != nil {
+		t.Fatalf("write config: %v", err)
+	}
+
+	backupRoot := filepath.Join(temp, "custom_backups")
+	t.Setenv(envBackupDir, backupRoot)
+
+	if _, err := EnsureRotatingLocalBackup(dbPath, cfgPath); err != nil {
+		t.Fatalf("backup with env: %v", err)
+	}
+	if _, err := os.Stat(filepath.Join(backupRoot, "daily", "meta.json")); err != nil {
+		t.Fatalf("expected backup in custom dir: %v", err)
+	}
+
+	t.Setenv(envBackupDisable, "1")
+	if _, err := EnsureRotatingLocalBackup(dbPath, cfgPath); err != nil {
+		t.Fatalf("backup disabled: %v", err)
+	}
+	if _, err := os.Stat(filepath.Join(backupRoot, "daily", "meta.json")); err != nil {
+		t.Fatalf("backup should remain from previous run: %v", err)
+	}
+}