#[cfg(test)]
mod tests {
    use keep::meta_plugin::digest::*;
    use keep::meta_plugin::MetaPlugin;
    use std::io::Write;

    #[test]
    fn test_digest_sha256_meta_plugin() {
        let mut plugin = DigestSha256MetaPlugin::new("test_digest".to_string());
        
        assert_eq!(plugin.meta_name(), "test_digest");
        assert!(plugin.is_internal());
        
        // Creating a writer should work
        let writer_result = plugin.create();
        assert!(writer_result.is_ok());
        
        // Writing some data
        let mut writer = writer_result.unwrap();
        let write_result = writer.write(b"test data");
        assert!(write_result.is_ok());
    }

    #[test]
    fn test_read_time_meta_plugin() {
        let mut plugin = ReadTimeMetaPlugin::new("read_time_test".to_string());
        
        assert_eq!(plugin.meta_name(), "read_time_test");
        assert!(plugin.is_internal());
        
        // Creating a writer should work
        let writer_result = plugin.create();
        assert!(writer_result.is_ok());
    }

    #[test]
    fn test_read_rate_meta_plugin() {
        let mut plugin = ReadRateMetaPlugin::new("read_rate_test".to_string());
        
        assert_eq!(plugin.meta_name(), "read_rate_test");
        assert!(plugin.is_internal());
        
        // Creating a writer should work
        let writer_result = plugin.create();
        assert!(writer_result.is_ok());
    }
}