rust/tests/fmt.rs

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Rust
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use std::path::PathBuf;
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use std::process::Command;
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#[test]
fn fmt() {
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if option_env!("RUSTC_TEST_SUITE").is_some() || option_env!("NO_FMT_TEST").is_some() {
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return;
}
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// Skip this test if nightly rustfmt is unavailable
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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 = PathBuf::from(env!("CARGO_MANIFEST_DIR"));
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let output = Command::new("cargo")
.current_dir(root_dir)
.args(&["dev", "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 `cargo dev fmt` to update formatting."
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);
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}