Docker Test Helper

This is a small helper library to build and run Rust applications inside a Docker container (using podman). Its main use is to test applications that require specific file paths or permissions that would be inappropriate to perform locally on a development machine (e.g. chmod to root or enabling setuid).

Right now it is somewhat specific to my use-cases, but may be of use to others.

```rust use dockertest::util::buildand_deploy;

const RUSTVERSION: &str = "1.65.0"; const TESTUSER: &str = "nobody";

[test]

fn help() { let (container, bin) = buildanddeploy("mybin", None, None, RUSTVERSION).unwrap(); let out = container.exec(vec![bin.asstr(), "--help"]).unwrap(); let stdout = String::from_utf8(out.stdout).unwrap(); assert!(out.status.success()); assert!(stdout.contains("Run commands as a user")); }

[test]

fn notroot() { let (container, bin) = buildanddeploy("mybin", None, None, RUSTVERSION).unwrap(); let out = container.execas(TESTUSER, vec![bin.asstr(), "/bin/ls"]).unwrap(); assert!(!out.status.success()); assert!(String::fromutf8(out.stderr).unwrap() .contains("Error: Not running as root")); } ```