use assert_cmd::prelude::*; // Add methods on commands use predicates::prelude::*; // Used for writing assertions use std::process::Command; // Run programs #[test] fn file_doesnt_exist() -> Result<(), Box> { let mut cmd = Command::cargo_bin("mox")?; cmd.arg("scan").arg("--file").arg("test.moxy"); cmd.assert() .failure() .stderr(predicate::str::contains("No such file or directory")); Ok(()) } #[test] fn scan_file_succeeds() -> Result<(), Box> { let mut cmd = Command::cargo_bin("mox")?; cmd.arg("scan").arg("--file").arg("test.mox"); cmd.assert().success().stdout(predicate::str::contains( "1:0 TokenFalse \"no\"", )); Ok(()) }