You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: minisign_test.go
    path of file: ./repos/sliver/util/minisign
    
    the code of the file until where you have to start completion: // Copyright (c) 2021 Andreas Auernhammer. All rights reserved.
// Use of this source code is governed by a license that can be
// found in the LICENSE file.

package minisign

import (
	"io"
	"os"
	"testing"
)

func TestRoundtrip(t *testing.T) {
	const Password = "correct horse battery staple"
	privateKey, err := PrivateKeyFromFile(Password, "./internal/testdata/m
    
func TestRoundtrip(t *testing.T) {
	const Password = "correct horse battery staple"
	privateKey, err := PrivateKeyFromFile(Password, "./internal/testdata/minisign.key")
	if err != nil {
		t.Fatalf("Failed to load private key: %v", err)
	}

	message, err := os.ReadFile("./internal/testdata/message.txt")
	if err != nil {
		t.Fatalf("Failed to load message: %v", err)
	}
	signature := Sign(privateKey, message)

	publicKey, err := PublicKeyFromFile("./internal/testdata/minisign.pub")
	if err != nil {
		t.Fatalf("Failed to load public key: %v", err)
	}

	if !Verify(publicKey, message, signature) {
		t.Fatalf("Verification failed: signature %q - public key %q", signature, publicKey)
	}
}