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 extern crate assert_cli;
15 use std::collections::{HashMap, HashSet};
18 use std::io::{self, BufRead, BufReader, Read};
19 use std::iter::{Enumerate, Peekable};
20 use std::path::{Path, PathBuf};
23 use config::summary::Summary;
24 use config::{Color, Config, ReportTactic};
28 const DIFF_CONTEXT_SIZE: usize = 3;
29 const CONFIGURATIONS_FILE_NAME: &str = "Configurations.md";
31 // Returns a `Vec` containing `PathBuf`s of files with a rs extension in the
32 // given path. The `recursive` argument controls if files from subdirectories
34 fn get_test_files(path: &Path, recursive: bool) -> Vec<PathBuf> {
35 let mut files = vec![];
37 for entry in fs::read_dir(path).expect(&format!(
38 "Couldn't read directory {}",
39 path.to_str().unwrap()
41 let entry = entry.expect("Couldn't get DirEntry");
42 let path = entry.path();
43 if path.is_dir() && recursive {
44 files.append(&mut get_test_files(&path, recursive));
45 } else if path.extension().map_or(false, |f| f == "rs") {
53 fn verify_config_used(path: &Path, config_name: &str) {
54 for entry in fs::read_dir(path).expect(&format!(
55 "Couldn't read {} directory",
56 path.to_str().unwrap()
58 let entry = entry.expect("Couldn't get directory entry");
59 let path = entry.path();
60 if path.extension().map_or(false, |f| f == "rs") {
61 // check if "// rustfmt-<config_name>:" appears in the file.
62 let filebuf = BufReader::new(
63 fs::File::open(&path).expect(&format!("Couldn't read file {}", path.display())),
69 .take_while(|l| l.starts_with("//"))
70 .any(|l| l.starts_with(&format!("// rustfmt-{}", config_name))),
72 "config option file {} does not contain expected config name",
81 fn verify_config_test_names() {
83 Path::new("tests/source/configs"),
84 Path::new("tests/target/configs"),
86 for entry in fs::read_dir(path).expect("Couldn't read configs directory") {
87 let entry = entry.expect("Couldn't get directory entry");
88 let path = entry.path();
90 let config_name = path.file_name().unwrap().to_str().unwrap();
92 // Make sure that config name is used in the files in the directory.
93 verify_config_used(&path, config_name);
99 // This writes to the terminal using the same approach (via term::stdout or
100 // println!) that is used by `rustfmt::rustfmt_diff::print_diff`. Writing
101 // using only one or the other will cause the output order to differ when
102 // `print_diff` selects the approach not used.
103 fn write_message(msg: &str) {
104 let mut writer = OutputWriter::new(Color::Auto);
105 writer.writeln(&format!("{}", msg), None);
108 // Integration tests. The files in the tests/source are formatted and compared
109 // to their equivalent in tests/target. The target file and config can be
110 // overridden by annotations in the source file. The input and output must match
114 // Get all files in the tests/source directory.
115 let files = get_test_files(Path::new("tests/source"), true);
116 let (_reports, count, fails) = check_files(files, None);
119 println!("Ran {} system tests.", count);
120 assert_eq!(fails, 0, "{} system tests failed", fails);
123 // Do the same for tests/coverage-source directory
124 // the only difference is the coverage mode
126 fn coverage_tests() {
127 let files = get_test_files(Path::new("tests/coverage/source"), true);
128 let (_reports, count, fails) = check_files(files, None);
130 println!("Ran {} tests in coverage mode.", count);
131 assert_eq!(fails, 0, "{} tests failed", fails);
135 fn checkstyle_test() {
136 let filename = "tests/writemode/source/fn-single-line.rs";
137 let expected_filename = "tests/writemode/target/checkstyle.xml";
138 assert_output(Path::new(filename), Path::new(expected_filename));
143 // Test "modified" output
144 let filename = "tests/writemode/source/modified.rs";
145 let result = get_modified_lines(Input::File(filename.into()), &Config::default()).unwrap();
153 lines: vec!["fn blah() {}".into()],
158 lines: vec!["#[cfg(a, b)]".into(), "fn main() {}".into()],
165 // Helper function for comparing the results of rustfmt
166 // to a known output file generated by one of the write modes.
167 fn assert_output(source: &Path, expected_filename: &Path) {
168 let config = read_config(source);
169 let (_error_summary, file_map, _report) = format_file(source, &config);
171 // Populate output by writing to a vec.
172 let mut out = vec![];
173 let _ = filemap::write_all_files(&file_map, &mut out, &config);
174 let output = String::from_utf8(out).unwrap();
176 let mut expected_file = fs::File::open(&expected_filename).expect("Couldn't open target");
177 let mut expected_text = String::new();
179 .read_to_string(&mut expected_text)
180 .expect("Failed reading target");
182 let compare = make_diff(&expected_text, &output, DIFF_CONTEXT_SIZE);
183 if !compare.is_empty() {
184 let mut failures = HashMap::new();
185 failures.insert(source.to_owned(), compare);
186 print_mismatches_default_message(failures);
187 assert!(false, "Text does not match expected output");
191 // Idempotence tests. Files in tests/target are checked to be unaltered by
194 fn idempotence_tests() {
195 match option_env!("CFG_RELEASE_CHANNEL") {
196 None | Some("nightly") => {}
197 _ => return, // these tests require nightly
199 // Get all files in the tests/target directory.
200 let files = get_test_files(Path::new("tests/target"), true);
201 let (_reports, count, fails) = check_files(files, None);
204 println!("Ran {} idempotent tests.", count);
205 assert_eq!(fails, 0, "{} idempotent tests failed", fails);
208 // Run rustfmt on itself. This operation must be idempotent. We also check that
209 // no warnings are emitted.
212 let mut files = get_test_files(Path::new("tests"), false);
213 let bin_directories = vec!["cargo-fmt", "git-rustfmt", "bin", "format-diff"];
214 for dir in bin_directories {
215 let mut path = PathBuf::from("src");
217 path.push("main.rs");
220 files.push(PathBuf::from("src/lib.rs"));
222 let (reports, count, fails) = check_files(files, Some(PathBuf::from("rustfmt.toml")));
223 let mut warnings = 0;
226 println!("Ran {} self tests.", count);
227 assert_eq!(fails, 0, "{} self tests failed", fails);
229 for format_report in reports {
230 println!("{}", format_report);
231 warnings += format_report.warning_count();
236 "Rustfmt's code generated {} warnings",
242 fn stdin_formatting_smoke_test() {
243 let input = Input::Text("fn main () {}".to_owned());
244 let mut config = Config::default();
245 config.set().emit_mode(EmitMode::Stdout);
246 let mut buf: Vec<u8> = vec![];
247 let (error_summary, _) = format_input(input, &config, Some(&mut buf)).unwrap();
248 assert!(error_summary.has_no_errors());
249 //eprintln!("{:?}", );
250 assert_eq!(buf, "fn main() {}\n".as_bytes());
253 // FIXME(#1990) restore this test
255 // fn stdin_disable_all_formatting_test() {
256 // let input = String::from("fn main() { println!(\"This should not be formatted.\"); }");
257 // let mut child = Command::new("./target/debug/rustfmt")
258 // .stdin(Stdio::piped())
259 // .stdout(Stdio::piped())
260 // .arg("--config-path=./tests/config/disable_all_formatting.toml")
262 // .expect("failed to execute child");
265 // let stdin = child.stdin.as_mut().expect("failed to get stdin");
267 // .write_all(input.as_bytes())
268 // .expect("failed to write stdin");
270 // let output = child.wait_with_output().expect("failed to wait on child");
271 // assert!(output.status.success());
272 // assert!(output.stderr.is_empty());
273 // assert_eq!(input, String::from_utf8(output.stdout).unwrap());
277 fn format_lines_errors_are_reported() {
278 let long_identifier = String::from_utf8(vec![b'a'; 239]).unwrap();
279 let input = Input::Text(format!("fn {}() {{}}", long_identifier));
280 let mut config = Config::default();
281 config.set().error_on_line_overflow(true);
282 let (error_summary, _) = format_input::<io::Stdout>(input, &config, None).unwrap();
283 assert!(error_summary.has_formatting_errors());
287 fn format_lines_errors_are_reported_with_tabs() {
288 let long_identifier = String::from_utf8(vec![b'a'; 97]).unwrap();
289 let input = Input::Text(format!("fn a() {{\n\t{}\n}}", long_identifier));
290 let mut config = Config::default();
291 config.set().error_on_line_overflow(true);
292 config.set().hard_tabs(true);
293 let (error_summary, _) = format_input::<io::Stdout>(input, &config, None).unwrap();
294 assert!(error_summary.has_formatting_errors());
297 // For each file, run rustfmt and collect the output.
298 // Returns the number of files checked and the number of failures.
299 fn check_files(files: Vec<PathBuf>, opt_config: Option<PathBuf>) -> (Vec<FormatReport>, u32, u32) {
302 let mut reports = vec![];
304 for file_name in files {
305 debug!("Testing '{}'...", file_name.display());
307 match idempotent_check(&file_name, &opt_config) {
308 Ok(ref report) if report.has_warnings() => {
309 print!("{}", report);
312 Ok(report) => reports.push(report),
314 if let IdempotentCheckError::Mismatch(msg) = err {
315 print_mismatches_default_message(msg);
324 (reports, count, fails)
327 fn print_mismatches_default_message(result: HashMap<PathBuf, Vec<Mismatch>>) {
328 for (file_name, diff) in result {
329 let mismatch_msg_formatter =
330 |line_num| format!("\nMismatch at {}:{}:", file_name.display(), line_num);
331 print_diff(diff, &mismatch_msg_formatter, &Default::default());
334 if let Some(mut t) = term::stdout() {
335 t.reset().unwrap_or(());
339 fn print_mismatches<T: Fn(u32) -> String>(
340 result: HashMap<PathBuf, Vec<Mismatch>>,
341 mismatch_msg_formatter: T,
343 for (_file_name, diff) in result {
344 print_diff(diff, &mismatch_msg_formatter, &Default::default());
347 if let Some(mut t) = term::stdout() {
348 t.reset().unwrap_or(());
352 fn read_config(filename: &Path) -> Config {
353 let sig_comments = read_significant_comments(filename);
354 // Look for a config file... If there is a 'config' property in the significant comments, use
355 // that. Otherwise, if there are no significant comments at all, look for a config file with
356 // the same name as the test file.
357 let mut config = if !sig_comments.is_empty() {
358 get_config(sig_comments.get("config").map(Path::new))
360 get_config(filename.with_extension("toml").file_name().map(Path::new))
363 for (key, val) in &sig_comments {
364 if key != "target" && key != "config" {
365 config.override_value(key, val);
366 if config.is_default(key) {
367 warn!("Default value {} used explicitly for {}", val, key);
372 // Don't generate warnings for to-do items.
373 config.set().report_todo(ReportTactic::Never);
378 fn format_file<P: Into<PathBuf>>(filepath: P, config: &Config) -> (Summary, FileMap, FormatReport) {
379 let filepath = filepath.into();
380 let input = Input::File(filepath);
381 //format_input::<io::Stdout>(input, config, None).unwrap()
382 syntax::with_globals(|| format_input_inner::<io::Stdout>(input, config, None)).unwrap()
385 enum IdempotentCheckError {
386 Mismatch(HashMap<PathBuf, Vec<Mismatch>>),
392 opt_config: &Option<PathBuf>,
393 ) -> Result<FormatReport, IdempotentCheckError> {
394 let sig_comments = read_significant_comments(filename);
395 let config = if let Some(ref config_file_path) = opt_config {
396 Config::from_toml_path(config_file_path).expect("rustfmt.toml not found")
398 read_config(filename)
400 let (error_summary, file_map, format_report) = format_file(filename, &config);
401 if error_summary.has_parsing_errors() {
402 return Err(IdempotentCheckError::Parse);
405 let mut write_result = HashMap::new();
406 for (filename, text) in file_map {
407 if let FileName::Real(ref filename) = filename {
408 write_result.insert(filename.to_owned(), text);
412 let target = sig_comments.get("target").map(|x| &(*x)[..]);
414 handle_result(write_result, target).map(|_| format_report)
417 // Reads test config file using the supplied (optional) file name. If there's no file name or the
418 // file doesn't exist, just return the default config. Otherwise, the file must be read
420 fn get_config(config_file: Option<&Path>) -> Config {
421 let config_file_name = match config_file {
422 None => return Default::default(),
424 let mut full_path = PathBuf::from("tests/config/");
425 full_path.push(file_name);
426 if !full_path.exists() {
427 return Default::default();
433 let mut def_config_file = fs::File::open(config_file_name).expect("Couldn't open config");
434 let mut def_config = String::new();
436 .read_to_string(&mut def_config)
437 .expect("Couldn't read config");
439 Config::from_toml(&def_config, Path::new("tests/config/")).expect("Invalid toml")
442 // Reads significant comments of the form: // rustfmt-key: value
444 fn read_significant_comments(file_name: &Path) -> HashMap<String, String> {
446 fs::File::open(file_name).expect(&format!("Couldn't read file {}", file_name.display()));
447 let reader = BufReader::new(file);
448 let pattern = r"^\s*//\s*rustfmt-([^:]+):\s*(\S+)";
449 let regex = regex::Regex::new(pattern).expect("Failed creating pattern 1");
451 // Matches lines containing significant comments or whitespace.
452 let line_regex = regex::Regex::new(r"(^\s*$)|(^\s*//\s*rustfmt-[^:]+:\s*\S+)")
453 .expect("Failed creating pattern 2");
457 .map(|line| line.expect("Failed getting line"))
458 .take_while(|line| line_regex.is_match(line))
460 regex.captures_iter(&line).next().map(|capture| {
464 .expect("Couldn't unwrap capture")
469 .expect("Couldn't unwrap capture")
478 // Compare output to input.
479 // TODO: needs a better name, more explanation.
481 result: HashMap<PathBuf, String>,
482 target: Option<&str>,
483 ) -> Result<(), IdempotentCheckError> {
484 let mut failures = HashMap::new();
486 for (file_name, fmt_text) in result {
487 // If file is in tests/source, compare to file with same name in tests/target.
488 let target = get_target(&file_name, target);
489 let open_error = format!("Couldn't open target {:?}", &target);
490 let mut f = fs::File::open(&target).expect(&open_error);
492 let mut text = String::new();
493 let read_error = format!("Failed reading target {:?}", &target);
494 f.read_to_string(&mut text).expect(&read_error);
496 // Ignore LF and CRLF difference for Windows.
497 if !string_eq_ignore_newline_repr(&fmt_text, &text) {
498 let diff = make_diff(&text, &fmt_text, DIFF_CONTEXT_SIZE);
501 "Empty diff? Maybe due to a missing a newline at the end of a file?"
503 failures.insert(file_name, diff);
507 if failures.is_empty() {
510 Err(IdempotentCheckError::Mismatch(failures))
514 // Map source file paths to their target paths.
515 fn get_target(file_name: &Path, target: Option<&str>) -> PathBuf {
516 if let Some(n) = file_name
518 .position(|c| c.as_os_str() == "source")
520 let mut target_file_name = PathBuf::new();
521 for (i, c) in file_name.components().enumerate() {
523 target_file_name.push("target");
525 target_file_name.push(c.as_os_str());
528 if let Some(replace_name) = target {
529 target_file_name.with_file_name(replace_name)
534 // This is either and idempotence check or a self check
540 fn rustfmt_diff_make_diff_tests() {
541 let diff = make_diff("a\nb\nc\nd", "a\ne\nc\nd", 3);
548 DiffLine::Context("a".into()),
549 DiffLine::Resulting("b".into()),
550 DiffLine::Expected("e".into()),
551 DiffLine::Context("c".into()),
552 DiffLine::Context("d".into()),
559 fn rustfmt_diff_no_diff_test() {
560 let diff = make_diff("a\nb\nc\nd", "a\nb\nc\nd", 3);
561 assert_eq!(diff, vec![]);
564 // Compare strings without distinguishing between CRLF and LF
565 fn string_eq_ignore_newline_repr(left: &str, right: &str) -> bool {
566 let left = CharsIgnoreNewlineRepr(left.chars().peekable());
567 let right = CharsIgnoreNewlineRepr(right.chars().peekable());
571 struct CharsIgnoreNewlineRepr<'a>(Peekable<Chars<'a>>);
573 impl<'a> Iterator for CharsIgnoreNewlineRepr<'a> {
576 fn next(&mut self) -> Option<char> {
577 self.0.next().map(|c| {
579 if *self.0.peek().unwrap_or(&'\0') == '\n' {
593 fn string_eq_ignore_newline_repr_test() {
594 assert!(string_eq_ignore_newline_repr("", ""));
595 assert!(!string_eq_ignore_newline_repr("", "abc"));
596 assert!(!string_eq_ignore_newline_repr("abc", ""));
597 assert!(string_eq_ignore_newline_repr("a\nb\nc\rd", "a\nb\r\nc\rd"));
598 assert!(string_eq_ignore_newline_repr("a\r\n\r\n\r\nb", "a\n\n\nb"));
599 assert!(!string_eq_ignore_newline_repr("a\r\nbcd", "a\nbcdefghijk"));
602 // This enum is used to represent one of three text features in Configurations.md: a block of code
603 // with its starting line number, the name of a rustfmt configuration option, or the value of a
604 // rustfmt configuration option.
605 enum ConfigurationSection {
606 CodeBlock((String, u32)), // (String: block of code, u32: line number of code block start)
611 impl ConfigurationSection {
612 fn get_section<I: Iterator<Item = String>>(
613 file: &mut Enumerate<I>,
614 ) -> Option<ConfigurationSection> {
616 static ref CONFIG_NAME_REGEX: regex::Regex =
617 regex::Regex::new(r"^## `([^`]+)`").expect("Failed creating configuration pattern");
618 static ref CONFIG_VALUE_REGEX: regex::Regex =
619 regex::Regex::new(r#"^#### `"?([^`"]+)"?`"#)
620 .expect("Failed creating configuration value pattern");
626 if line.starts_with("```rust") {
627 // Get the lines of the code block.
628 let lines: Vec<String> = file
630 .take_while(|l| !l.starts_with("```"))
632 let block = format!("{}\n", lines.join("\n"));
634 // +1 to translate to one-based indexing
635 // +1 to get to first line of code (line after "```")
636 let start_line = (i + 2) as u32;
638 return Some(ConfigurationSection::CodeBlock((block, start_line)));
639 } else if let Some(c) = CONFIG_NAME_REGEX.captures(&line) {
640 return Some(ConfigurationSection::ConfigName(String::from(&c[1])));
641 } else if let Some(c) = CONFIG_VALUE_REGEX.captures(&line) {
642 return Some(ConfigurationSection::ConfigValue(String::from(&c[1])));
645 None => return None, // reached the end of the file
651 // This struct stores the information about code blocks in the configurations
652 // file, formats the code blocks, and prints formatting errors.
653 struct ConfigCodeBlock {
654 config_name: Option<String>,
655 config_value: Option<String>,
656 code_block: Option<String>,
657 code_block_start: Option<u32>,
660 impl ConfigCodeBlock {
661 fn new() -> ConfigCodeBlock {
666 code_block_start: None,
670 fn set_config_name(&mut self, name: Option<String>) {
671 self.config_name = name;
672 self.config_value = None;
675 fn set_config_value(&mut self, value: Option<String>) {
676 self.config_value = value;
679 fn set_code_block(&mut self, code_block: String, code_block_start: u32) {
680 self.code_block = Some(code_block);
681 self.code_block_start = Some(code_block_start);
684 fn get_block_config(&self) -> Config {
685 let mut config = Config::default();
686 if self.config_value.is_some() && self.config_value.is_some() {
687 config.override_value(
688 self.config_name.as_ref().unwrap(),
689 self.config_value.as_ref().unwrap(),
695 fn code_block_valid(&self) -> bool {
696 // We never expect to not have a code block.
697 assert!(self.code_block.is_some() && self.code_block_start.is_some());
699 // See if code block begins with #![rustfmt::skip].
707 == "#![rustfmt::skip]";
709 if self.config_name.is_none() && !fmt_skip {
710 write_message(&format!(
711 "No configuration name for {}:{}",
712 CONFIGURATIONS_FILE_NAME,
713 self.code_block_start.unwrap()
717 if self.config_value.is_none() && !fmt_skip {
718 write_message(&format!(
719 "No configuration value for {}:{}",
720 CONFIGURATIONS_FILE_NAME,
721 self.code_block_start.unwrap()
728 fn has_parsing_errors(&self, error_summary: Summary) -> bool {
729 if error_summary.has_parsing_errors() {
730 write_message(&format!(
731 "\u{261d}\u{1f3fd} Cannot format {}:{}",
732 CONFIGURATIONS_FILE_NAME,
733 self.code_block_start.unwrap()
741 fn print_diff(&self, compare: Vec<Mismatch>) {
742 let mut mismatches = HashMap::new();
743 mismatches.insert(PathBuf::from(CONFIGURATIONS_FILE_NAME), compare);
744 print_mismatches(mismatches, |line_num| {
746 "\nMismatch at {}:{}:",
747 CONFIGURATIONS_FILE_NAME,
748 line_num + self.code_block_start.unwrap() - 1
753 fn formatted_has_diff(&self, text: &str) -> bool {
754 let compare = make_diff(self.code_block.as_ref().unwrap(), text, DIFF_CONTEXT_SIZE);
755 if !compare.is_empty() {
756 self.print_diff(compare);
763 // Return a bool indicating if formatting this code block is an idempotent
764 // operation. This function also triggers printing any formatting failure
766 fn formatted_is_idempotent(&self) -> bool {
767 // Verify that we have all of the expected information.
768 if !self.code_block_valid() {
772 let input = Input::Text(self.code_block.as_ref().unwrap().to_owned());
773 let mut config = self.get_block_config();
774 config.set().emit_mode(EmitMode::Stdout);
775 let mut buf: Vec<u8> = vec![];
777 let (error_summary, _) = format_input(input, &config, Some(&mut buf)).unwrap();
779 !self.has_parsing_errors(error_summary)
780 && !self.formatted_has_diff(&String::from_utf8(buf).unwrap())
783 // Extract a code block from the iterator. Behavior:
784 // - Rust code blocks are identifed by lines beginning with "```rust".
785 // - One explicit configuration setting is supported per code block.
786 // - Rust code blocks with no configuration setting are illegal and cause an
787 // assertion failure, unless the snippet begins with #![rustfmt::skip].
788 // - Configuration names in Configurations.md must be in the form of
790 // - Configuration values in Configurations.md must be in the form of
792 fn extract<I: Iterator<Item = String>>(
793 file: &mut Enumerate<I>,
794 prev: Option<&ConfigCodeBlock>,
795 hash_set: &mut HashSet<String>,
796 ) -> Option<ConfigCodeBlock> {
797 let mut code_block = ConfigCodeBlock::new();
798 code_block.config_name = prev.and_then(|cb| cb.config_name.clone());
801 match ConfigurationSection::get_section(file) {
802 Some(ConfigurationSection::CodeBlock((block, start_line))) => {
803 code_block.set_code_block(block, start_line);
806 Some(ConfigurationSection::ConfigName(name)) => {
808 Config::is_valid_name(&name),
809 "an unknown configuration option was found: {}",
813 hash_set.remove(&name),
814 "multiple configuration guides found for option {}",
817 code_block.set_config_name(Some(name));
819 Some(ConfigurationSection::ConfigValue(value)) => {
820 code_block.set_config_value(Some(value));
822 None => return None, // end of file was reached
831 fn configuration_snippet_tests() {
832 // Read Configurations.md and build a `Vec` of `ConfigCodeBlock` structs with one
833 // entry for each Rust code block found.
834 fn get_code_blocks() -> Vec<ConfigCodeBlock> {
835 let mut file_iter = BufReader::new(
836 fs::File::open(Path::new(CONFIGURATIONS_FILE_NAME))
837 .expect(&format!("Couldn't read file {}", CONFIGURATIONS_FILE_NAME)),
841 let mut code_blocks: Vec<ConfigCodeBlock> = Vec::new();
842 let mut hash_set = Config::hash_set();
845 ConfigCodeBlock::extract(&mut file_iter, code_blocks.last(), &mut hash_set)
847 code_blocks.push(cb);
850 for name in hash_set {
851 if !Config::is_hidden_option(&name) {
852 panic!("{} does not have a configuration guide", name);
859 let blocks = get_code_blocks();
860 let failures = blocks
862 .map(|b| b.formatted_is_idempotent())
863 .fold(0, |acc, r| acc + (!r as u32));
866 println!("Ran {} configurations tests.", blocks.len());
867 assert_eq!(failures, 0, "{} configurations tests failed", failures);
874 fn make_temp_file(file_name: &'static str) -> TempFile {
878 // Used in the Rust build system.
879 let target_dir = var("RUSTFMT_TEST_DIR").unwrap_or_else(|_| ".".to_owned());
880 let path = Path::new(&target_dir).join(file_name);
882 let mut file = File::create(&path).expect("Couldn't create temp file");
883 let content = "fn main() {}\n";
884 file.write_all(content.as_bytes())
885 .expect("Couldn't write temp file");
889 impl Drop for TempFile {
891 use std::fs::remove_file;
892 remove_file(&self.path).expect("Couldn't delete temp file");
896 fn rustfmt() -> PathBuf {
897 let mut me = env::current_exe().expect("failed to get current executable");
898 me.pop(); // chop of the test name
899 me.pop(); // chop off `deps`
902 me.is_file() || me.with_extension("exe").is_file(),
903 "no rustfmt bin, try running `cargo build` before testing"
909 fn verify_check_works() {
910 let temp_file = make_temp_file("temp_check.rs");
911 assert_cli::Assert::command(&[
912 rustfmt().to_str().unwrap(),
914 temp_file.path.to_str().unwrap(),