letsencrypt: Fix Windows tests

config/letsencrypt/storage_test.go

 package letsencrypt
 
-import "testing"
+import (
+	"path/filepath"
+	"testing"
+)
 
 func TestStorage(t *testing.T) {
 	storage = Storage("./letsencrypt")
 
-	if expected, actual := "letsencrypt/sites", storage.Sites(); actual != expected {
+	if expected, actual := filepath.Join("letsencrypt", "sites"), storage.Sites(); actual != expected {
 		t.Errorf("Expected Sites() to return '%s' but got '%s'", expected, actual)
 	}
-	if expected, actual := "letsencrypt/sites/test.com", storage.Site("test.com"); actual != expected {
+	if expected, actual := filepath.Join("letsencrypt", "sites", "test.com"), storage.Site("test.com"); actual != expected {
 		t.Errorf("Expected Site() to return '%s' but got '%s'", expected, actual)
 	}
-	if expected, actual := "letsencrypt/sites/test.com/test.com.crt", storage.SiteCertFile("test.com"); actual != expected {
+	if expected, actual := filepath.Join("letsencrypt", "sites", "test.com", "test.com.crt"), storage.SiteCertFile("test.com"); actual != expected {
 		t.Errorf("Expected SiteCertFile() to return '%s' but got '%s'", expected, actual)
 	}
-	if expected, actual := "letsencrypt/sites/test.com/test.com.key", storage.SiteKeyFile("test.com"); actual != expected {
+	if expected, actual := filepath.Join("letsencrypt", "sites", "test.com", "test.com.key"), storage.SiteKeyFile("test.com"); actual != expected {
 		t.Errorf("Expected SiteKeyFile() to return '%s' but got '%s'", expected, actual)
 	}
-	if expected, actual := "letsencrypt/sites/test.com/test.com.json", storage.SiteMetaFile("test.com"); actual != expected {
+	if expected, actual := filepath.Join("letsencrypt", "sites", "test.com", "test.com.json"), storage.SiteMetaFile("test.com"); actual != expected {
 		t.Errorf("Expected SiteMetaFile() to return '%s' but got '%s'", expected, actual)
 	}
-	if expected, actual := "letsencrypt/users", storage.Users(); actual != expected {
+	if expected, actual := filepath.Join("letsencrypt", "users"), storage.Users(); actual != expected {
 		t.Errorf("Expected Users() to return '%s' but got '%s'", expected, actual)
 	}
-	if expected, actual := "letsencrypt/users/me@example.com", storage.User("me@example.com"); actual != expected {
+	if expected, actual := filepath.Join("letsencrypt", "users", "me@example.com"), storage.User("me@example.com"); actual != expected {
 		t.Errorf("Expected User() to return '%s' but got '%s'", expected, actual)
 	}
-	if expected, actual := "letsencrypt/users/me@example.com/me.json", storage.UserRegFile("me@example.com"); actual != expected {
+	if expected, actual := filepath.Join("letsencrypt", "users", "me@example.com", "me.json"), storage.UserRegFile("me@example.com"); actual != expected {
 		t.Errorf("Expected UserRegFile() to return '%s' but got '%s'", expected, actual)
 	}
-	if expected, actual := "letsencrypt/users/me@example.com/me.key", storage.UserKeyFile("me@example.com"); actual != expected {
+	if expected, actual := filepath.Join("letsencrypt", "users", "me@example.com", "me.key"), storage.UserKeyFile("me@example.com"); actual != expected {
 		t.Errorf("Expected UserKeyFile() to return '%s' but got '%s'", expected, actual)
 	}
 }