如何为Base64.decdeBase64编写JUnit测试

import org.apache.commons.codec.binary.Base64;
import org.junit.Assert;
import org.junit.Test;

public class Base64Test {

    @Test
    public void testDecodeBase64() {
        // 测试代码将在这里编写
    }
}

public class Base64Test {

    @Test
    public void testDecodeBase64() {
        String encodedString = "SGVsbG8gV29ybGQh"; // 待解码的Base64字符串
        String expectedString = "Hello World!"; // 期望的解码结果

        byte[] decodedBytes = Base64.decodeBase64(encodedString.getBytes());
        String decodedString = new String(decodedBytes);

        Assert.assertEquals(expectedString, decodedString);
    }
}