Macro assert_keys_neq 

macro_rules! assert_keys_neq {
    ($account_a: expr, $account_b: expr $(,)?) => { ... };
    ($account_a: expr, $account_b: expr, $err_code: ident $(,)?) => { ... };
    ($account_a: expr, $account_b: expr, $msg: literal $(,)?) => { ... };
    ($account_a: expr, $account_b: expr, $err: expr $(,)?) => { ... };
    ($account_a: expr, $account_b: expr, $err: expr, $msg: expr $(,)?) => { ... };
}

Asserts that two accounts do not share the same key.

Example

let one = Pubkey::default();
let two = Pubkey::default();
assert_keys_neq!(one, two); // throws an error