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|
//! Integration tests for rustfmt.
use std::env;
use std::fs::remove_file;
use std::path::Path;
use std::process::Command;
use rustfmt_config_proc_macro::rustfmt_only_ci_test;
/// Run the rustfmt executable and return its output.
fn rustfmt(args: &[&str]) -> (String, String) {
let mut bin_dir = env::current_exe().unwrap();
bin_dir.pop(); // chop off test exe name
if bin_dir.ends_with("deps") {
bin_dir.pop();
}
let cmd = bin_dir.join(format!("rustfmt{}", env::consts::EXE_SUFFIX));
// Ensure the rustfmt binary runs from the local target dir.
let path = env::var_os("PATH").unwrap_or_default();
let mut paths = env::split_paths(&path).collect::<Vec<_>>();
paths.insert(0, bin_dir);
let new_path = env::join_paths(paths).unwrap();
match Command::new(&cmd).args(args).env("PATH", new_path).output() {
Ok(output) => (
String::from_utf8(output.stdout).expect("utf-8"),
String::from_utf8(output.stderr).expect("utf-8"),
),
Err(e) => panic!("failed to run `{:?} {:?}`: {}", cmd, args, e),
}
}
macro_rules! assert_that {
($args:expr, $($check:ident $check_args:tt)&&+) => {
let (stdout, stderr) = rustfmt($args);
if $(!stdout.$check$check_args && !stderr.$check$check_args)||* {
panic!(
"Output not expected for rustfmt {:?}\n\
expected: {}\n\
actual stdout:\n{}\n\
actual stderr:\n{}",
$args,
stringify!($( $check$check_args )&&*),
stdout,
stderr
);
}
};
}
#[rustfmt_only_ci_test]
#[test]
fn print_config() {
assert_that!(
&["--print-config", "unknown"],
starts_with("Unknown print-config option")
);
assert_that!(&["--print-config", "default"], contains("max_width = 100"));
assert_that!(&["--print-config", "minimal"], contains("PATH required"));
assert_that!(
&["--print-config", "minimal", "minimal-config"],
contains("doesn't work with standard input.")
);
let (stdout, stderr) = rustfmt(&[
"--print-config",
"minimal",
"minimal-config",
"src/shape.rs",
]);
assert!(
Path::new("minimal-config").exists(),
"stdout:\n{}\nstderr:\n{}",
stdout,
stderr
);
remove_file("minimal-config").unwrap();
}
#[rustfmt_only_ci_test]
#[test]
fn inline_config() {
// single invocation
assert_that!(
&[
"--print-config",
"current",
".",
"--config=color=Never,edition=2018"
],
contains("color = \"Never\"") && contains("edition = \"2018\"")
);
// multiple overriding invocations
assert_that!(
&[
"--print-config",
"current",
".",
"--config",
"color=never,edition=2018",
"--config",
"color=always,format_strings=true"
],
contains("color = \"Always\"")
&& contains("edition = \"2018\"")
&& contains("format_strings = true")
);
}
#[test]
fn rustfmt_usage_text() {
let args = ["--help"];
let (stdout, _) = rustfmt(&args);
assert!(stdout.contains("Format Rust code\n\nusage: rustfmt [options] <file>..."));
}
#[test]
fn mod_resolution_error_multiple_candidate_files() {
// See also https://github.com/rust-lang/rustfmt/issues/5167
let default_path = Path::new("tests/mod-resolver/issue-5167/src/a.rs");
let secondary_path = Path::new("tests/mod-resolver/issue-5167/src/a/mod.rs");
let error_message = format!(
"file for module found at both {:?} and {:?}",
default_path.canonicalize().unwrap(),
secondary_path.canonicalize().unwrap(),
);
let args = ["tests/mod-resolver/issue-5167/src/lib.rs"];
let (_stdout, stderr) = rustfmt(&args);
assert!(stderr.contains(&error_message))
}
#[test]
fn mod_resolution_error_sibling_module_not_found() {
let args = ["tests/mod-resolver/module-not-found/sibling_module/lib.rs"];
let (_stdout, stderr) = rustfmt(&args);
// Module resolution fails because we're unable to find `a.rs` in the same directory as lib.rs
assert!(stderr.contains("a.rs does not exist"))
}
#[test]
fn mod_resolution_error_relative_module_not_found() {
let args = ["tests/mod-resolver/module-not-found/relative_module/lib.rs"];
let (_stdout, stderr) = rustfmt(&args);
// The file `./a.rs` and directory `./a` both exist.
// Module resolution fails because we're unable to find `./a/b.rs`
#[cfg(not(windows))]
assert!(stderr.contains("a/b.rs does not exist"));
#[cfg(windows)]
assert!(stderr.contains("a\\b.rs does not exist"));
}
#[test]
fn mod_resolution_error_path_attribute_does_not_exist() {
let args = ["tests/mod-resolver/module-not-found/bad_path_attribute/lib.rs"];
let (_stdout, stderr) = rustfmt(&args);
// The path attribute points to a file that does not exist
assert!(stderr.contains("does_not_exist.rs does not exist"));
}
#[test]
fn rustfmt_emits_error_on_line_overflow_true() {
// See also https://github.com/rust-lang/rustfmt/issues/3164
let args = [
"--config",
"error_on_line_overflow=true",
"tests/cargo-fmt/source/issue_3164/src/main.rs",
];
let (_stdout, stderr) = rustfmt(&args);
assert!(stderr.contains(
"line formatted, but exceeded maximum width (maximum: 100 (see `max_width` option)"
))
}
|
