rust/cargo read env from shell and reuse them instread of explicity setting them in front of command everytime [duplicate]

I want to run a rust test with some env, like:

use std::env; #[test] fn test_case1() { env::var("ENV1").unwrap(); env::var("ENV2").unwrap(); } #[test] fn test_case2() { env::var("ENV1").unwrap(); env::var("ENV2").unwrap(); } 

ENV1=ABC ENV2=123 cargo test test_case1 

But I want to only set these env once and I can reuse them in the shell, like:

ENV1=ABC ENV2=123 echo $ENV1 // ABC echo $ENV2 // 123 cargo test test_case1 // test_case1 will read ENV1, ENV2 then quit, cargo test test_case2 // test_case2 will read ENV1, ENV2 too 

How can I do it?