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: lib.rs
    path of file: ./repos/ink/integration-tests/sr25519-verification
    
    the code of the file until where you have to start completion: #![cfg_attr(not(feature = "std"), no_std, no_main)]

#[ink::contract]
pub mod sr25519_verification {
    #[ink(storage)]
    #[derive(Default)]
    pub struct Sr25519Verification {}

    impl Sr25519Verification {
        /// Creates a new sr25519 verification smart contract initialized with the given
        /// value.
        #[ink(constructor)]
        pub fn new() -> Self {
            Self {}
        }

        /// Dummy method to satisfy constaint of more than 0 messages per contract.
        #[ink(message)]
        pub fn foobar(&self) {
            ink::env::debug_println!("foobar - this method does nothing");
        }
    }

    #[cfg(test)]
    mod tests {

        #[ink::test]
        fn test_sr25519_verify_valid() {
            // "<Bytes>hello<Bytes>" as bytes
            let message: [u8; 49] = [
                60, 66, 121, 116, 101, 115, 62, 48, 120, 52, 54, 102, 98, 55, 52, 48, 56,
                100, 52, 102, 50, 56, 53, 50, 50, 56, 102, 52, 97, 102, 53, 49, 54, 101,
                97, 50, 53, 56, 53, 49, 98, 60, 47, 66, 121, 116, 101, 115, 62,
            ];
            // alice
            let publi
    
        fn test_sr25519_verify_valid() {
            // "<Bytes>hello<Bytes>" as bytes
            let message: [u8; 49] = [
                60, 66, 121, 116, 101, 115, 62, 48, 120, 52, 54, 102, 98, 55, 52, 48, 56,
                100, 52, 102, 50, 56, 53, 50, 50, 56, 102, 52, 97, 102, 53, 49, 54, 101,
                97, 50, 53, 56, 53, 49, 98, 60, 47, 66, 121, 116, 101, 115, 62,
            ];
            // alice
            let public_key: [u8; 32] = [
                212, 53, 147, 199, 21, 253, 211, 28, 97, 20, 26, 189, 4, 169, 159, 214,
                130, 44, 133, 88, 133, 76, 205, 227, 154, 86, 132, 231, 165, 109, 162,
                125,
            ];
            // alice's signature of the message
            let signature: [u8; 64] = [
                10, 125, 162, 182, 49, 112, 76, 220, 254, 147, 199, 64, 228, 18, 23, 185,
                172, 102, 122, 12, 135, 85, 216, 218, 26, 130, 50, 219, 82, 127, 72, 124,
                135, 231, 128, 210, 237, 193, 137, 106, 235, 107, 27, 239, 11, 199, 195,
                141, 157, 242, 19, 91, 99, 62, 171, 139, 251, 23, 119, 232, 47, 173, 58,
                143,
            ];
            let result = ink::env::sr25519_verify(&signature, &message, &public_key);
            assert_eq!(result, Ok(()));
        }