rust/tests/fmt.rs

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use std::process::Command;
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#[test]
fn fmt() {
if option_env!("RUSTC_TEST_SUITE").is_some() {
return;
}
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// Skip this test if rustup nightly is unavailable
let rustup_output = Command::new("rustup")
.args(&["component", "list", "--toolchain", "nightly"])
.output()
.unwrap();
assert!(rustup_output.status.success());
let component_output = String::from_utf8_lossy(&rustup_output.stdout);
if !component_output.contains("rustfmt") {
return;
}
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let root_dir = std::path::PathBuf::from(env!("CARGO_MANIFEST_DIR"));
let dev_dir = root_dir.join("clippy_dev");
let target_dir = root_dir.join("target");
let target_dir = target_dir.to_str().unwrap();
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let output = Command::new("cargo")
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.current_dir(dev_dir)
.args(&["+nightly", "run", "--target-dir", target_dir, "--", "fmt", "--check"])
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.output()
.unwrap();
println!("status: {}", output.status);
println!("stdout: {}", String::from_utf8_lossy(&output.stdout));
println!("stderr: {}", String::from_utf8_lossy(&output.stderr));
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assert!(
output.status.success(),
"Formatting check failed. Run `./util/dev fmt` to update formatting."
);
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}