1 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 #![feature(catch_panic)]
18 use std::collections::HashMap;
20 use std::io::{self, Read, BufRead, BufReader};
23 use rustfmt::config::Config;
24 use rustfmt::rustfmt_diff::*;
26 static DIFF_CONTEXT_SIZE: usize = 3;
28 fn get_path_string(dir_entry: io::Result<fs::DirEntry>) -> String {
29 let path = dir_entry.ok().expect("Couldn't get DirEntry.").path();
31 path.to_str().expect("Couldn't stringify path.").to_owned()
34 // Integration tests. The files in the tests/source are formatted and compared
35 // to their equivalent in tests/target. The target file and config can be
36 // overriden by annotations in the source file. The input and output must match
38 // FIXME(#28) would be good to check for error messages and fail on them, or at
42 // Get all files in the tests/source directory
43 let files = fs::read_dir("tests/source").ok().expect("Couldn't read source dir.");
44 // turn a DirEntry into a String that represents the relative path to the file
45 let files = files.map(get_path_string);
47 let (count, fails) = check_files(files);
50 println!("Ran {} system tests.", count);
51 assert!(fails == 0, "{} system tests failed", fails);
54 // Idempotence tests. Files in tests/target are checked to be unaltered by
57 fn idempotence_tests() {
58 // Get all files in the tests/target directory
59 let files = fs::read_dir("tests/target").ok().expect("Couldn't read target dir.");
60 let files = files.chain(fs::read_dir("tests").ok().expect("Couldn't read tests dir."));
61 let files = files.chain(fs::read_dir("src/bin").ok().expect("Couldn't read src dir."));
62 // turn a DirEntry into a String that represents the relative path to the file
63 let files = files.map(get_path_string);
64 // hack because there's no `IntoIterator` impl for `[T; N]`
65 let files = files.chain(Some("src/lib.rs".to_owned()).into_iter());
67 let (count, fails) = check_files(files);
70 println!("Ran {} idempotent tests.", count);
71 assert!(fails == 0, "{} idempotent tests failed", fails);
74 // For each file, run rustfmt and collect the output.
75 // Returns the number of files checked and the number of failures.
76 fn check_files<I>(files: I) -> (u32, u32)
77 where I: Iterator<Item = String>
82 for file_name in files.filter(|f| f.ends_with(".rs")) {
83 println!("Testing '{}'...", file_name);
84 if let Err(msg) = idempotent_check(file_name) {
85 print_mismatches(msg);
94 fn print_mismatches(result: HashMap<String, Vec<Mismatch>>) {
95 let mut t = term::stdout().unwrap();
97 for (file_name, diff) in result {
98 print_diff(diff, |line_num| format!("\nMismatch at {}:{}:", file_name, line_num));
101 assert!(t.reset().unwrap());
104 // Ick, just needed to get a &'static to handle_result.
105 static HANDLE_RESULT: &'static Fn(HashMap<String, String>) = &handle_result;
107 pub fn idempotent_check(filename: String) -> Result<(), HashMap<String, Vec<Mismatch>>> {
108 let sig_comments = read_significant_comments(&filename);
109 let mut config = get_config(sig_comments.get("config").map(|x| &(*x)[..]));
110 let args = vec!["rustfmt".to_owned(), filename];
112 for (key, val) in sig_comments {
113 if key != "target" && key != "config" {
114 config.override_value(&key, &val);
118 // this thread is not used for concurrency, but rather to workaround the issue that the passed
119 // function handle needs to have static lifetime. Instead of using a global RefCell, we use
120 // panic to return a result in case of failure. This has the advantage of smoothing the road to
121 // multithreaded rustfmt
122 thread::catch_panic(move || {
123 run(args, WriteMode::Return(HANDLE_RESULT), config);
124 }).map_err(|any| *any.downcast().ok().expect("Downcast failed."))
128 // Reads test config file from comments and reads its contents.
129 fn get_config(config_file: Option<&str>) -> Box<Config> {
130 let config_file_name = match config_file {
131 None => return Box::new(Default::default()),
133 let mut full_path = "tests/config/".to_owned();
134 full_path.push_str(&file_name);
139 let mut def_config_file = fs::File::open(config_file_name).ok().expect("Couldn't open config.");
140 let mut def_config = String::new();
141 def_config_file.read_to_string(&mut def_config).ok().expect("Couldn't read config.");
143 Box::new(Config::from_toml(&def_config))
146 // Reads significant comments of the form: // rustfmt-key: value
148 fn read_significant_comments(file_name: &str) -> HashMap<String, String> {
149 let file = fs::File::open(file_name).ok().expect(&format!("Couldn't read file {}.", file_name));
150 let reader = BufReader::new(file);
151 let pattern = r"^\s*//\s*rustfmt-([^:]+):\s*(\S+)";
152 let regex = regex::Regex::new(&pattern).ok().expect("Failed creating pattern 1.");
154 // Matches lines containing significant comments or whitespace.
155 let line_regex = regex::Regex::new(r"(^\s*$)|(^\s*//\s*rustfmt-[^:]+:\s*\S+)").ok()
156 .expect("Failed creating pattern 2.");
159 .map(|line| line.ok().expect("Failed getting line."))
160 .take_while(|line| line_regex.is_match(&line))
162 regex.captures_iter(&line)
165 (capture.at(1).expect("Couldn't unwrap capture.").to_owned(),
166 capture.at(2).expect("Couldn't unwrap capture.").to_owned())
172 // Compare output to input.
173 // TODO: needs a better name, more explanation.
174 fn handle_result(result: HashMap<String, String>) {
175 let mut failures = HashMap::new();
177 for (file_name, fmt_text) in result {
178 // FIXME: reading significant comments again. Is there a way we can just
179 // pass the target to this function?
180 let sig_comments = read_significant_comments(&file_name);
182 // If file is in tests/source, compare to file with same name in tests/target.
183 let target = get_target(&file_name, sig_comments.get("target").map(|x| &(*x)[..]));
184 let mut f = fs::File::open(&target).ok().expect("Couldn't open target.");
186 let mut text = String::new();
187 // TODO: speedup by running through bytes iterator
188 f.read_to_string(&mut text).ok().expect("Failed reading target.");
189 if fmt_text != text {
190 let diff = make_diff(&text, &fmt_text, DIFF_CONTEXT_SIZE);
191 failures.insert(file_name, diff);
195 if !failures.is_empty() {
200 // Map source file paths to their target paths.
201 fn get_target(file_name: &str, target: Option<&str>) -> String {
202 if file_name.starts_with("tests/source/") {
203 let base = target.unwrap_or(file_name.trim_left_matches("tests/source/"));
205 format!("tests/target/{}", base)