Is there an easy way to work with cargo test without hard coded?

[up9cloud]

Basically, my program is something like:

Cargo.toml

[package]
name = "my_web_server"
version = "0.0.1"
edition = "2018"
[dependencies]
clap = "2.33"

src/main.rs

fn show() {
    for argument in std::env::args_os() {
        println!("{:?}", argument);
    }
}
fn get_config() {
    let _matches = clap::App::new("a").get_matches();
    // blabla
}

fn main() {
   show();
}

#[test]
fn test_a() {
    show();
    get_config();
    // doing things based on the config, e.q. db connect...
    assert!(true);
}

I want to test it by cargo test, but it shows errors

$ cargo test test_a -- --nocapture
   Compiling my_web_server v0.0.1 (/private/tmp/a)
    Finished test [unoptimized + debuginfo] target(s) in 3.92s
     Running target/debug/deps/my_web_server-722c15a8e468910d

running 1 test
"/private/tmp/a/target/debug/deps/my_web_server-722c15a8e468910d"
"test_a"
"--nocapture"
error: Found argument 'test_a' which wasn't expected, or isn't valid in this context

USAGE:
    my_web_server-722c15a8e468910d

For more information try --help
error: test failed, to rerun pass '--bin my_web_server'

I know I can manually parse arguments and pass to get_matches_from or do some like #2187 (comment), but those all are hard-coded.

Is there an easy way to work with?

[pksunkara]

You can try assert_cmd crate.