added IMAP, LetsEncrypt, update layout

internal/tlsutil/reloader_test.go

@@ -0,0 +1,48 @@
+package tlsutil
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+func TestCertReloaderReload(t *testing.T) {
+	dir := t.TempDir()
+	certFile := filepath.Join(dir, "server.crt")
+	keyFile := filepath.Join(dir, "server.key")
+
+	if err := GenerateSelfSignedCert(certFile, keyFile); err != nil {
+		t.Fatal(err)
+	}
+	reloader, err := NewCertReloader(certFile, keyFile)
+	if err != nil {
+		t.Fatal(err)
+	}
+	certA, err := reloader.GetCertificate(nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	// Overwrite with a fresh cert (delete first, since GenerateSelfSignedCert is
+	// skip-if-exists).
+	if err := os.Remove(certFile); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.Remove(keyFile); err != nil {
+		t.Fatal(err)
+	}
+	if err := GenerateSelfSignedCert(certFile, keyFile); err != nil {
+		t.Fatal(err)
+	}
+	if err := reloader.Reload(); err != nil {
+		t.Fatal(err)
+	}
+	certB, err := reloader.GetCertificate(nil)
+	if err != nil {
+		t.Fatal(err)
+	}
+
+	if string(certA.Certificate[0]) == string(certB.Certificate[0]) {
+		t.Fatal("expected Reload to pick up a different certificate, got the same bytes")
+	}
+}