How to pass arguments from github actions to unit tests in rust - testing

Question

I would like to use github secrets to inject a secret API key into my unit testing functions to prevent having ay API key within the source:
My (simplfied) test is defining the APIKEY as string constant.
const APIKEY: &str = "ddbe2befdeadbeefa2d20f09b4a694";
#[test]
fn test_apikey() {
assert!( usekey(APIKEY).is_ok() );
}
Now I would like to get the API-key from the arguments which the test executable gets when I run:
> cargo test -- ddbe2befdeadbeefa2d20f09b4a694";
But while I tried to use the following code to get the first argument with:
let args: Vec<String> = env::args().collect();
let apikey = &args[1];
I realized that my tests won't be processed any more whenever I give an argument to cargo test --.
Here is the call without giving arguments:
▶ cargo test -v --
[..]
Finished test [unoptimized + debuginfo] target(s) in 0.05s
Running `/home/pat/git/myprg/target/debug/deps/myrg-7e0bdeadbeef95ff`
running 7 tests
test tests::test_cityid ... ok
test tests::test_coordinate ... ok
test tests::test_apikey ... ok
test tests::test_city ... ok
test tests::test_language ... ok
test tests::test_units ... ok
test tests::test_cities ... ok
test result: ok. 7 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
But no test will be processed when I try to give the apikey in an argument to the tests:
▶ cargo test -v -- ddbe2befdeadbeefa2d20f09b4a694
[..]
Finished test [unoptimized + debuginfo] target(s) in 0.05s
Running `/home/pat/git/myprg/target/debug/deps/myprg-7e0bdeadbeef95ff ddbe2befdeadbeefa2d20f09b4a694";`
running 0 tests
test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 7 filtered out
One can see that the test was correctly called with the apikey attached.
I do not understand why this happens and diving into rust tests documentation did not lead me to something useful.
Do you have any tips?

Answer 1

Seems that giving secrets through program arguments is not how it's been made.
Instead use a method like this:
fn apikey() -> String {
match std::env::var("APIKEY") {
Ok(key) => key,
Err(_r) => {
eprintln!("error: set API-key with environment valiable APIKEY");
"".to_string()
}
}
}
...I can inject the API key into my tests in github actions with:
env:
APIKEY: ${{ secrets.APIKEY }}
jobs:
build:
steps:
- name: Run tests
run: cargo test --verbose
Thanks for the help!