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;
13 use std::collections::{HashMap, HashSet};
15 use std::io::{self, BufRead, BufReader, Read};
16 use std::iter::{Enumerate, Peekable};
17 use std::path::{Path, PathBuf};
20 use config::summary::Summary;
21 use config::{Color, Config, ReportTactic};
22 use filemap::write_system_newlines;
26 const DIFF_CONTEXT_SIZE: usize = 3;
27 const CONFIGURATIONS_FILE_NAME: &str = "Configurations.md";
29 // Returns a `Vec` containing `PathBuf`s of files with a rs extension in the
30 // given path. The `recursive` argument controls if files from subdirectories
32 fn get_test_files(path: &Path, recursive: bool) -> Vec<PathBuf> {
33 let mut files = vec![];
35 for entry in fs::read_dir(path).expect(&format!(
36 "Couldn't read directory {}",
37 path.to_str().unwrap()
39 let entry = entry.expect("Couldn't get DirEntry");
40 let path = entry.path();
41 if path.is_dir() && recursive {
42 files.append(&mut get_test_files(&path, recursive));
43 } else if path.extension().map_or(false, |f| f == "rs") {
51 fn verify_config_used(path: &Path, config_name: &str) {
52 for entry in fs::read_dir(path).expect(&format!(
53 "Couldn't read {} directory",
54 path.to_str().unwrap()
56 let entry = entry.expect("Couldn't get directory entry");
57 let path = entry.path();
58 if path.extension().map_or(false, |f| f == "rs") {
59 // check if "// rustfmt-<config_name>:" appears in the file.
60 let filebuf = BufReader::new(
61 fs::File::open(&path).expect(&format!("Couldn't read file {}", path.display())),
67 .take_while(|l| l.starts_with("//"))
68 .any(|l| l.starts_with(&format!("// rustfmt-{}", config_name))),
70 "config option file {} does not contain expected config name",
79 fn verify_config_test_names() {
81 Path::new("tests/source/configs"),
82 Path::new("tests/target/configs"),
84 for entry in fs::read_dir(path).expect("Couldn't read configs directory") {
85 let entry = entry.expect("Couldn't get directory entry");
86 let path = entry.path();
88 let config_name = path.file_name().unwrap().to_str().unwrap();
90 // Make sure that config name is used in the files in the directory.
91 verify_config_used(&path, config_name);
97 // This writes to the terminal using the same approach (via term::stdout or
98 // println!) that is used by `rustfmt::rustfmt_diff::print_diff`. Writing
99 // using only one or the other will cause the output order to differ when
100 // `print_diff` selects the approach not used.
101 fn write_message(msg: &str) {
102 let mut writer = OutputWriter::new(Color::Auto);
103 writer.writeln(&format!("{}", msg), None);
106 // Integration tests. The files in the tests/source are formatted and compared
107 // to their equivalent in tests/target. The target file and config can be
108 // overridden by annotations in the source file. The input and output must match
112 // Get all files in the tests/source directory.
113 let files = get_test_files(Path::new("tests/source"), true);
114 let (_reports, count, fails) = check_files(files);
117 println!("Ran {} system tests.", count);
118 assert_eq!(fails, 0, "{} system tests failed", fails);
121 // Do the same for tests/coverage-source directory
122 // the only difference is the coverage mode
124 fn coverage_tests() {
125 let files = get_test_files(Path::new("tests/coverage/source"), true);
126 let (_reports, count, fails) = check_files(files);
128 println!("Ran {} tests in coverage mode.", count);
129 assert_eq!(fails, 0, "{} tests failed", fails);
133 fn checkstyle_test() {
134 let filename = "tests/writemode/source/fn-single-line.rs";
135 let expected_filename = "tests/writemode/target/checkstyle.xml";
136 assert_output(Path::new(filename), Path::new(expected_filename));
141 // Test "modified" output
142 let filename = "tests/writemode/source/modified.rs";
143 let result = get_modified_lines(Input::File(filename.into()), &Config::default()).unwrap();
145 result.modified_lines,
151 lines: vec!["fn blah() {}".into()],
156 lines: vec!["#[cfg(a, b)]".into(), "fn main() {}".into()],
163 // Helper function for comparing the results of rustfmt
164 // to a known output file generated by one of the write modes.
165 fn assert_output(source: &Path, expected_filename: &Path) {
166 let config = read_config(source);
167 let (_error_summary, file_map, _report) = format_file(source, &config);
169 // Populate output by writing to a vec.
170 let mut out = vec![];
171 let _ = filemap::write_all_files(&file_map, &mut out, &config);
172 let output = String::from_utf8(out).unwrap();
174 let mut expected_file = fs::File::open(&expected_filename).expect("Couldn't open target");
175 let mut expected_text = String::new();
177 .read_to_string(&mut expected_text)
178 .expect("Failed reading target");
180 let compare = make_diff(&expected_text, &output, DIFF_CONTEXT_SIZE);
181 if !compare.is_empty() {
182 let mut failures = HashMap::new();
183 failures.insert(source.to_owned(), compare);
184 print_mismatches_default_message(failures);
185 assert!(false, "Text does not match expected output");
189 // Idempotence tests. Files in tests/target are checked to be unaltered by
192 fn idempotence_tests() {
193 // Get all files in the tests/target directory.
194 let files = get_test_files(Path::new("tests/target"), true);
195 let (_reports, count, fails) = check_files(files);
198 println!("Ran {} idempotent tests.", count);
199 assert_eq!(fails, 0, "{} idempotent tests failed", fails);
202 // Run rustfmt on itself. This operation must be idempotent. We also check that
203 // no warnings are emitted.
206 let mut files = get_test_files(Path::new("tests"), false);
207 let bin_directories = vec!["cargo-fmt", "git-rustfmt", "bin", "format-diff"];
208 for dir in bin_directories {
209 let mut path = PathBuf::from("src");
211 path.push("main.rs");
214 files.push(PathBuf::from("src/lib.rs"));
216 let (reports, count, fails) = check_files(files);
217 let mut warnings = 0;
220 println!("Ran {} self tests.", count);
221 assert_eq!(fails, 0, "{} self tests failed", fails);
223 for format_report in reports {
224 println!("{}", format_report);
225 warnings += format_report.warning_count();
230 "Rustfmt's code generated {} warnings",
236 fn stdin_formatting_smoke_test() {
237 let input = Input::Text("fn main () {}".to_owned());
238 let config = Config::default();
239 let (error_summary, file_map, _report) =
240 format_input::<io::Stdout>(input, &config, None).unwrap();
241 assert!(error_summary.has_no_errors());
242 for &(ref file_name, ref text) in &file_map {
243 if let FileName::Custom(ref file_name) = *file_name {
244 if file_name == "stdin" {
245 assert_eq!(text.to_string(), "fn main() {}\n");
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, _file_map, _report) =
283 format_input::<io::Stdout>(input, &config, None).unwrap();
284 assert!(error_summary.has_formatting_errors());
288 fn format_lines_errors_are_reported_with_tabs() {
289 let long_identifier = String::from_utf8(vec![b'a'; 97]).unwrap();
290 let input = Input::Text(format!("fn a() {{\n\t{}\n}}", long_identifier));
291 let mut config = Config::default();
292 config.set().error_on_line_overflow(true);
293 config.set().hard_tabs(true);
294 let (error_summary, _file_map, _report) =
295 format_input::<io::Stdout>(input, &config, None).unwrap();
296 assert!(error_summary.has_formatting_errors());
299 // For each file, run rustfmt and collect the output.
300 // Returns the number of files checked and the number of failures.
301 fn check_files(files: Vec<PathBuf>) -> (Vec<FormatReport>, u32, u32) {
304 let mut reports = vec![];
306 for file_name in files {
307 debug!("Testing '{}'...", file_name.display());
309 match idempotent_check(&file_name) {
310 Ok(ref report) if report.has_warnings() => {
311 print!("{}", report);
314 Ok(report) => reports.push(report),
316 if let IdempotentCheckError::Mismatch(msg) = err {
317 print_mismatches_default_message(msg);
326 (reports, count, fails)
329 fn print_mismatches_default_message(result: HashMap<PathBuf, Vec<Mismatch>>) {
330 for (file_name, diff) in result {
331 let mismatch_msg_formatter =
332 |line_num| format!("\nMismatch at {}:{}:", file_name.display(), line_num);
333 print_diff(diff, &mismatch_msg_formatter, &Default::default());
336 if let Some(mut t) = term::stdout() {
337 t.reset().unwrap_or(());
341 fn print_mismatches<T: Fn(u32) -> String>(
342 result: HashMap<PathBuf, Vec<Mismatch>>,
343 mismatch_msg_formatter: T,
345 for (_file_name, diff) in result {
346 print_diff(diff, &mismatch_msg_formatter, &Default::default());
349 if let Some(mut t) = term::stdout() {
350 t.reset().unwrap_or(());
354 fn read_config(filename: &Path) -> Config {
355 let sig_comments = read_significant_comments(filename);
356 // Look for a config file... If there is a 'config' property in the significant comments, use
357 // that. Otherwise, if there are no significant comments at all, look for a config file with
358 // the same name as the test file.
359 let mut config = if !sig_comments.is_empty() {
360 get_config(sig_comments.get("config").map(Path::new))
362 get_config(filename.with_extension("toml").file_name().map(Path::new))
365 for (key, val) in &sig_comments {
366 if key != "target" && key != "config" {
367 config.override_value(key, val);
371 // Don't generate warnings for to-do items.
372 config.set().report_todo(ReportTactic::Never);
377 fn format_file<P: Into<PathBuf>>(filepath: P, config: &Config) -> (Summary, FileMap, FormatReport) {
378 let filepath = filepath.into();
379 let input = Input::File(filepath);
380 format_input::<io::Stdout>(input, config, None).unwrap()
383 pub enum IdempotentCheckError {
384 Mismatch(HashMap<PathBuf, Vec<Mismatch>>),
388 pub fn idempotent_check(filename: &PathBuf) -> Result<FormatReport, IdempotentCheckError> {
389 let sig_comments = read_significant_comments(filename);
390 let config = read_config(filename);
391 let (error_summary, file_map, format_report) = format_file(filename, &config);
392 if error_summary.has_parsing_errors() {
393 return Err(IdempotentCheckError::Parse);
396 let mut write_result = HashMap::new();
397 for &(ref filename, ref text) in &file_map {
398 let mut v = Vec::new();
399 // Won't panic, as we're not doing any IO.
400 write_system_newlines(&mut v, text, &config).unwrap();
401 // Won't panic, we are writing correct utf8.
402 let one_result = String::from_utf8(v).unwrap();
403 if let FileName::Real(ref filename) = *filename {
404 write_result.insert(filename.to_owned(), one_result);
408 let target = sig_comments.get("target").map(|x| &(*x)[..]);
410 handle_result(write_result, target).map(|_| format_report)
413 // Reads test config file using the supplied (optional) file name. If there's no file name or the
414 // file doesn't exist, just return the default config. Otherwise, the file must be read
416 fn get_config(config_file: Option<&Path>) -> Config {
417 let config_file_name = match config_file {
418 None => return Default::default(),
420 let mut full_path = PathBuf::from("tests/config/");
421 full_path.push(file_name);
422 if !full_path.exists() {
423 return Default::default();
429 let mut def_config_file = fs::File::open(config_file_name).expect("Couldn't open config");
430 let mut def_config = String::new();
432 .read_to_string(&mut def_config)
433 .expect("Couldn't read config");
435 Config::from_toml(&def_config, Path::new("tests/config/")).expect("Invalid toml")
438 // Reads significant comments of the form: // rustfmt-key: value
440 fn read_significant_comments(file_name: &Path) -> HashMap<String, String> {
442 fs::File::open(file_name).expect(&format!("Couldn't read file {}", file_name.display()));
443 let reader = BufReader::new(file);
444 let pattern = r"^\s*//\s*rustfmt-([^:]+):\s*(\S+)";
445 let regex = regex::Regex::new(pattern).expect("Failed creating pattern 1");
447 // Matches lines containing significant comments or whitespace.
448 let line_regex = regex::Regex::new(r"(^\s*$)|(^\s*//\s*rustfmt-[^:]+:\s*\S+)")
449 .expect("Failed creating pattern 2");
453 .map(|line| line.expect("Failed getting line"))
454 .take_while(|line| line_regex.is_match(line))
456 regex.captures_iter(&line).next().map(|capture| {
460 .expect("Couldn't unwrap capture")
465 .expect("Couldn't unwrap capture")
474 // Compare output to input.
475 // TODO: needs a better name, more explanation.
477 result: HashMap<PathBuf, String>,
478 target: Option<&str>,
479 ) -> Result<(), IdempotentCheckError> {
480 let mut failures = HashMap::new();
482 for (file_name, fmt_text) in result {
483 // If file is in tests/source, compare to file with same name in tests/target.
484 let target = get_target(&file_name, target);
485 let open_error = format!("Couldn't open target {:?}", &target);
486 let mut f = fs::File::open(&target).expect(&open_error);
488 let mut text = String::new();
489 let read_error = format!("Failed reading target {:?}", &target);
490 f.read_to_string(&mut text).expect(&read_error);
492 // Ignore LF and CRLF difference for Windows.
493 if !string_eq_ignore_newline_repr(&fmt_text, &text) {
494 let diff = make_diff(&text, &fmt_text, DIFF_CONTEXT_SIZE);
497 "Empty diff? Maybe due to a missing a newline at the end of a file?"
499 failures.insert(file_name, diff);
503 if failures.is_empty() {
506 Err(IdempotentCheckError::Mismatch(failures))
510 // Map source file paths to their target paths.
511 fn get_target(file_name: &Path, target: Option<&str>) -> PathBuf {
512 if let Some(n) = file_name
514 .position(|c| c.as_os_str() == "source")
516 let mut target_file_name = PathBuf::new();
517 for (i, c) in file_name.components().enumerate() {
519 target_file_name.push("target");
521 target_file_name.push(c.as_os_str());
524 if let Some(replace_name) = target {
525 target_file_name.with_file_name(replace_name)
530 // This is either and idempotence check or a self check
536 fn rustfmt_diff_make_diff_tests() {
537 let diff = make_diff("a\nb\nc\nd", "a\ne\nc\nd", 3);
544 DiffLine::Context("a".into()),
545 DiffLine::Resulting("b".into()),
546 DiffLine::Expected("e".into()),
547 DiffLine::Context("c".into()),
548 DiffLine::Context("d".into()),
555 fn rustfmt_diff_no_diff_test() {
556 let diff = make_diff("a\nb\nc\nd", "a\nb\nc\nd", 3);
557 assert_eq!(diff, vec![]);
560 // Compare strings without distinguishing between CRLF and LF
561 fn string_eq_ignore_newline_repr(left: &str, right: &str) -> bool {
562 let left = CharsIgnoreNewlineRepr(left.chars().peekable());
563 let right = CharsIgnoreNewlineRepr(right.chars().peekable());
567 struct CharsIgnoreNewlineRepr<'a>(Peekable<Chars<'a>>);
569 impl<'a> Iterator for CharsIgnoreNewlineRepr<'a> {
572 fn next(&mut self) -> Option<char> {
573 self.0.next().map(|c| {
575 if *self.0.peek().unwrap_or(&'\0') == '\n' {
589 fn string_eq_ignore_newline_repr_test() {
590 assert!(string_eq_ignore_newline_repr("", ""));
591 assert!(!string_eq_ignore_newline_repr("", "abc"));
592 assert!(!string_eq_ignore_newline_repr("abc", ""));
593 assert!(string_eq_ignore_newline_repr("a\nb\nc\rd", "a\nb\r\nc\rd"));
594 assert!(string_eq_ignore_newline_repr("a\r\n\r\n\r\nb", "a\n\n\nb"));
595 assert!(!string_eq_ignore_newline_repr("a\r\nbcd", "a\nbcdefghijk"));
598 // This enum is used to represent one of three text features in Configurations.md: a block of code
599 // with its starting line number, the name of a rustfmt configuration option, or the value of a
600 // rustfmt configuration option.
601 enum ConfigurationSection {
602 CodeBlock((String, u32)), // (String: block of code, u32: line number of code block start)
607 impl ConfigurationSection {
608 fn get_section<I: Iterator<Item = String>>(
609 file: &mut Enumerate<I>,
610 ) -> Option<ConfigurationSection> {
612 static ref CONFIG_NAME_REGEX: regex::Regex =
613 regex::Regex::new(r"^## `([^`]+)`").expect("Failed creating configuration pattern");
614 static ref CONFIG_VALUE_REGEX: regex::Regex = regex::Regex::new(r#"^#### `"?([^`"]+)"?`"#)
615 .expect("Failed creating configuration value pattern");
621 if line.starts_with("```rust") {
622 // Get the lines of the code block.
623 let lines: Vec<String> = file.map(|(_i, l)| l)
624 .take_while(|l| !l.starts_with("```"))
626 let block = format!("{}\n", lines.join("\n"));
628 // +1 to translate to one-based indexing
629 // +1 to get to first line of code (line after "```")
630 let start_line = (i + 2) as u32;
632 return Some(ConfigurationSection::CodeBlock((block, start_line)));
633 } else if let Some(c) = CONFIG_NAME_REGEX.captures(&line) {
634 return Some(ConfigurationSection::ConfigName(String::from(&c[1])));
635 } else if let Some(c) = CONFIG_VALUE_REGEX.captures(&line) {
636 return Some(ConfigurationSection::ConfigValue(String::from(&c[1])));
639 None => return None, // reached the end of the file
645 // This struct stores the information about code blocks in the configurations
646 // file, formats the code blocks, and prints formatting errors.
647 struct ConfigCodeBlock {
648 config_name: Option<String>,
649 config_value: Option<String>,
650 code_block: Option<String>,
651 code_block_start: Option<u32>,
654 impl ConfigCodeBlock {
655 fn new() -> ConfigCodeBlock {
660 code_block_start: None,
664 fn set_config_name(&mut self, name: Option<String>) {
665 self.config_name = name;
666 self.config_value = None;
669 fn set_config_value(&mut self, value: Option<String>) {
670 self.config_value = value;
673 fn set_code_block(&mut self, code_block: String, code_block_start: u32) {
674 self.code_block = Some(code_block);
675 self.code_block_start = Some(code_block_start);
678 fn get_block_config(&self) -> Config {
679 let mut config = Config::default();
680 if self.config_value.is_some() && self.config_value.is_some() {
681 config.override_value(
682 self.config_name.as_ref().unwrap(),
683 self.config_value.as_ref().unwrap(),
689 fn code_block_valid(&self) -> bool {
690 // We never expect to not have a code block.
691 assert!(self.code_block.is_some() && self.code_block_start.is_some());
693 // See if code block begins with #![rustfmt_skip].
694 let fmt_skip = self.code_block
699 .unwrap_or("") == "#![rustfmt_skip]";
701 if self.config_name.is_none() && !fmt_skip {
702 write_message(&format!(
703 "No configuration name for {}:{}",
704 CONFIGURATIONS_FILE_NAME,
705 self.code_block_start.unwrap()
709 if self.config_value.is_none() && !fmt_skip {
710 write_message(&format!(
711 "No configuration value for {}:{}",
712 CONFIGURATIONS_FILE_NAME,
713 self.code_block_start.unwrap()
720 fn has_parsing_errors(&self, error_summary: Summary) -> bool {
721 if error_summary.has_parsing_errors() {
722 write_message(&format!(
723 "\u{261d}\u{1f3fd} Cannot format {}:{}",
724 CONFIGURATIONS_FILE_NAME,
725 self.code_block_start.unwrap()
733 fn print_diff(&self, compare: Vec<Mismatch>) {
734 let mut mismatches = HashMap::new();
735 mismatches.insert(PathBuf::from(CONFIGURATIONS_FILE_NAME), compare);
736 print_mismatches(mismatches, |line_num| {
738 "\nMismatch at {}:{}:",
739 CONFIGURATIONS_FILE_NAME,
740 line_num + self.code_block_start.unwrap() - 1
745 fn formatted_has_diff(&self, file_map: &FileMap) -> bool {
746 let &(ref _file_name, ref text) = file_map.first().unwrap();
747 let compare = make_diff(self.code_block.as_ref().unwrap(), text, DIFF_CONTEXT_SIZE);
748 if !compare.is_empty() {
749 self.print_diff(compare);
756 // Return a bool indicating if formatting this code block is an idempotent
757 // operation. This function also triggers printing any formatting failure
759 fn formatted_is_idempotent(&self) -> bool {
760 // Verify that we have all of the expected information.
761 if !self.code_block_valid() {
765 let input = Input::Text(self.code_block.as_ref().unwrap().to_owned());
766 let config = self.get_block_config();
768 let (error_summary, file_map, _report) =
769 format_input::<io::Stdout>(input, &config, None).unwrap();
771 !self.has_parsing_errors(error_summary) && !self.formatted_has_diff(&file_map)
774 // Extract a code block from the iterator. Behavior:
775 // - Rust code blocks are identifed by lines beginning with "```rust".
776 // - One explicit configuration setting is supported per code block.
777 // - Rust code blocks with no configuration setting are illegal and cause an
778 // assertion failure, unless the snippet begins with #![rustfmt_skip].
779 // - Configuration names in Configurations.md must be in the form of
781 // - Configuration values in Configurations.md must be in the form of
783 fn extract<I: Iterator<Item = String>>(
784 file: &mut Enumerate<I>,
785 prev: Option<&ConfigCodeBlock>,
786 hash_set: &mut HashSet<String>,
787 ) -> Option<ConfigCodeBlock> {
788 let mut code_block = ConfigCodeBlock::new();
789 code_block.config_name = prev.and_then(|cb| cb.config_name.clone());
792 match ConfigurationSection::get_section(file) {
793 Some(ConfigurationSection::CodeBlock((block, start_line))) => {
794 code_block.set_code_block(block, start_line);
797 Some(ConfigurationSection::ConfigName(name)) => {
799 Config::is_valid_name(&name),
800 "an unknown configuration option was found: {}",
804 hash_set.remove(&name),
805 "multiple configuration guides found for option {}",
808 code_block.set_config_name(Some(name));
810 Some(ConfigurationSection::ConfigValue(value)) => {
811 code_block.set_config_value(Some(value));
813 None => return None, // end of file was reached
822 fn configuration_snippet_tests() {
823 // Read Configurations.md and build a `Vec` of `ConfigCodeBlock` structs with one
824 // entry for each Rust code block found.
825 fn get_code_blocks() -> Vec<ConfigCodeBlock> {
826 let mut file_iter = BufReader::new(
827 fs::File::open(Path::new(CONFIGURATIONS_FILE_NAME))
828 .expect(&format!("Couldn't read file {}", CONFIGURATIONS_FILE_NAME)),
832 let mut code_blocks: Vec<ConfigCodeBlock> = Vec::new();
833 let mut hash_set = Config::hash_set();
836 ConfigCodeBlock::extract(&mut file_iter, code_blocks.last(), &mut hash_set)
838 code_blocks.push(cb);
841 for name in hash_set {
842 if !Config::is_hidden_option(&name) {
843 panic!("{} does not have a configuration guide", name);
850 let blocks = get_code_blocks();
851 let failures = blocks
853 .map(|b| b.formatted_is_idempotent())
854 .fold(0, |acc, r| acc + (!r as u32));
857 println!("Ran {} configurations tests.", blocks.len());
858 assert_eq!(failures, 0, "{} configurations tests failed", failures);
865 fn make_temp_file(file_name: &'static str) -> TempFile {
869 // Used in the Rust build system.
870 let target_dir = var("RUSTFMT_TEST_DIR").unwrap_or_else(|_| ".".to_owned());
871 let path = Path::new(&target_dir).join(file_name);
873 let mut file = File::create(&path).expect("Couldn't create temp file");
874 let content = "fn main() {}\n";
875 file.write_all(content.as_bytes())
876 .expect("Couldn't write temp file");
880 impl Drop for TempFile {
882 use std::fs::remove_file;
883 remove_file(&self.path).expect("Couldn't delete temp file");
888 fn verify_check_works() {
889 let temp_file = make_temp_file("temp_check.rs");
890 assert_cli::Assert::command(&[
895 "--write-mode=check",
896 temp_file.path.to_str().unwrap(),
902 fn verify_diff_works() {
903 let temp_file = make_temp_file("temp_diff.rs");
904 assert_cli::Assert::command(&[
910 temp_file.path.to_str().unwrap(),