2 use std::default::Default;
4 use std::io::{Error, ErrorKind, Read};
5 use std::path::{Path, PathBuf};
11 use crate::config::config_type::ConfigType;
12 #[allow(unreachable_pub)]
13 pub use crate::config::file_lines::{FileLines, FileName, Range};
14 #[allow(unreachable_pub)]
15 pub use crate::config::lists::*;
16 #[allow(unreachable_pub)]
17 pub use crate::config::options::*;
20 pub(crate) mod config_type;
22 pub(crate) mod options;
24 pub(crate) mod file_lines;
25 pub(crate) mod license;
28 // This macro defines configuration options used in rustfmt. Each option
29 // is defined as follows:
31 // `name: value type, default value, is stable, description;`
34 max_width: usize, 100, true, "Maximum width of each line";
35 hard_tabs: bool, false, true, "Use tab characters for indentation, spaces for alignment";
36 tab_spaces: usize, 4, true, "Number of spaces per tab";
37 newline_style: NewlineStyle, NewlineStyle::Auto, true, "Unix or Windows line endings";
38 indent_style: IndentStyle, IndentStyle::Block, false, "How do we indent expressions or items";
41 use_small_heuristics: Heuristics, Heuristics::Default, true, "Whether to use different \
42 formatting for items and expressions if they satisfy a heuristic notion of 'small'";
43 width_heuristics: WidthHeuristics, WidthHeuristics::scaled(100), false,
44 "'small' heuristic values";
45 fn_call_width: usize, 60, true, "Maximum width of the args of a function call before \
46 falling back to vertical formatting.";
47 attr_fn_like_width: usize, 70, true, "Maximum width of the args of a function-like \
48 attributes before falling back to vertical formatting.";
49 struct_lit_width: usize, 18, true, "Maximum width in the body of a struct lit before \
50 falling back to vertical formatting.";
51 struct_variant_width: usize, 35, true, "Maximum width in the body of a struct variant before \
52 falling back to vertical formatting.";
53 array_width: usize, 60, true, "Maximum width of an array literal before falling \
54 back to vertical formatting.";
55 chain_width: usize, 60, true, "Maximum length of a chain to fit on a single line.";
56 single_line_if_else_max_width: usize, 50, true, "Maximum line length for single line if-else \
57 expressions. A value of zero means always break if-else expressions.";
59 // Comments. macros, and strings
60 wrap_comments: bool, false, false, "Break comments to fit on the line";
61 format_code_in_doc_comments: bool, false, false, "Format the code snippet in doc comments.";
62 comment_width: usize, 80, false,
63 "Maximum length of comments. No effect unless wrap_comments = true";
64 normalize_comments: bool, false, false, "Convert /* */ comments to // comments where possible";
65 normalize_doc_attributes: bool, false, false, "Normalize doc attributes as doc comments";
66 license_template_path: String, String::default(), false,
67 "Beginning of file must match license template";
68 format_strings: bool, false, false, "Format string literals where necessary";
69 format_macro_matchers: bool, false, false,
70 "Format the metavariable matching patterns in macros";
71 format_macro_bodies: bool, true, false, "Format the bodies of macros";
72 hex_literal_case: HexLiteralCase, HexLiteralCase::Preserve, false,
73 "Format hexadecimal integer literals";
75 // Single line expressions and items
76 empty_item_single_line: bool, true, false,
77 "Put empty-body functions and impls on a single line";
78 struct_lit_single_line: bool, true, false,
79 "Put small struct literals on a single line";
80 fn_single_line: bool, false, false, "Put single-expression functions on a single line";
81 where_single_line: bool, false, false, "Force where-clauses to be on a single line";
84 imports_indent: IndentStyle, IndentStyle::Block, false, "Indent of imports";
85 imports_layout: ListTactic, ListTactic::Mixed, false, "Item layout inside a import block";
86 imports_granularity: ImportGranularity, ImportGranularity::Preserve, false,
87 "Merge or split imports to the provided granularity";
88 group_imports: GroupImportsTactic, GroupImportsTactic::Preserve, false,
89 "Controls the strategy for how imports are grouped together";
90 merge_imports: bool, false, false, "(deprecated: use imports_granularity instead)";
93 reorder_imports: bool, true, true, "Reorder import and extern crate statements alphabetically";
94 reorder_modules: bool, true, true, "Reorder module statements alphabetically in group";
95 reorder_impl_items: bool, false, false, "Reorder impl items";
97 // Spaces around punctuation
98 type_punctuation_density: TypeDensity, TypeDensity::Wide, false,
99 "Determines if '+' or '=' are wrapped in spaces in the punctuation of types";
100 space_before_colon: bool, false, false, "Leave a space before the colon";
101 space_after_colon: bool, true, false, "Leave a space after the colon";
102 spaces_around_ranges: bool, false, false, "Put spaces around the .. and ..= range operators";
103 binop_separator: SeparatorPlace, SeparatorPlace::Front, false,
104 "Where to put a binary operator when a binary expression goes multiline";
107 remove_nested_parens: bool, true, true, "Remove nested parens";
108 combine_control_expr: bool, true, false, "Combine control expressions with function calls";
109 short_array_element_width_threshold: usize, 10, true,
110 "Width threshold for an array element to be considered short";
111 overflow_delimited_expr: bool, false, false,
112 "Allow trailing bracket/brace delimited expressions to overflow";
113 struct_field_align_threshold: usize, 0, false,
114 "Align struct fields if their diffs fits within threshold";
115 enum_discrim_align_threshold: usize, 0, false,
116 "Align enum variants discrims, if their diffs fit within threshold";
117 match_arm_blocks: bool, true, false, "Wrap the body of arms in blocks when it does not fit on \
118 the same line with the pattern of arms";
119 match_arm_leading_pipes: MatchArmLeadingPipe, MatchArmLeadingPipe::Never, true,
120 "Determines whether leading pipes are emitted on match arms";
121 force_multiline_blocks: bool, false, false,
122 "Force multiline closure bodies and match arms to be wrapped in a block";
123 fn_args_layout: Density, Density::Tall, true,
124 "Control the layout of arguments in a function";
125 brace_style: BraceStyle, BraceStyle::SameLineWhere, false, "Brace style for items";
126 control_brace_style: ControlBraceStyle, ControlBraceStyle::AlwaysSameLine, false,
127 "Brace style for control flow constructs";
128 trailing_semicolon: bool, true, false,
129 "Add trailing semicolon after break, continue and return";
130 trailing_comma: SeparatorTactic, SeparatorTactic::Vertical, false,
131 "How to handle trailing commas for lists";
132 match_block_trailing_comma: bool, false, true,
133 "Put a trailing comma after a block based match arm (non-block arms are not affected)";
134 blank_lines_upper_bound: usize, 1, false,
135 "Maximum number of blank lines which can be put between items";
136 blank_lines_lower_bound: usize, 0, false,
137 "Minimum number of blank lines which must be put between items";
138 edition: Edition, Edition::Edition2015, true, "The edition of the parser (RFC 2052)";
139 version: Version, Version::One, false, "Version of formatting rules";
140 inline_attribute_width: usize, 0, false,
141 "Write an item and its attribute on the same line \
142 if their combined width is below a threshold";
143 format_generated_files: bool, true, false, "Format generated files";
145 // Options that can change the source code beyond whitespace/blocks (somewhat linty things)
146 merge_derives: bool, true, true, "Merge multiple `#[derive(...)]` into a single one";
147 use_try_shorthand: bool, false, true, "Replace uses of the try! macro by the ? shorthand";
148 use_field_init_shorthand: bool, false, true, "Use field initialization shorthand if possible";
149 force_explicit_abi: bool, true, true, "Always print the abi for extern items";
150 condense_wildcard_suffixes: bool, false, false, "Replace strings of _ wildcards by a single .. \
153 // Control options (changes the operation of rustfmt, rather than the formatting)
154 color: Color, Color::Auto, false,
155 "What Color option to use when none is supplied: Always, Never, Auto";
156 required_version: String, env!("CARGO_PKG_VERSION").to_owned(), false,
157 "Require a specific version of rustfmt";
158 unstable_features: bool, false, false,
159 "Enables unstable features. Only available on nightly channel";
160 disable_all_formatting: bool, false, true, "Don't reformat anything";
161 skip_children: bool, false, false, "Don't reformat out of line modules";
162 hide_parse_errors: bool, false, false, "Hide errors from the parser";
163 error_on_line_overflow: bool, false, false, "Error if unable to get all lines within max_width";
164 error_on_unformatted: bool, false, false,
165 "Error if unable to get comments or string literals within max_width, \
166 or they are left with trailing whitespaces";
167 report_fixme: ReportTactic, ReportTactic::Never, false,
168 "Report all, none or unnumbered occurrences of FIXME in source file comments";
169 ignore: IgnoreList, IgnoreList::default(), false,
170 "Skip formatting the specified files and directories";
173 verbose: Verbosity, Verbosity::Normal, false, "How much to information to emit to the user";
174 file_lines: FileLines, FileLines::all(), false,
175 "Lines to format; this is not supported in rustfmt.toml, and can only be specified \
176 via the --file-lines option";
177 emit_mode: EmitMode, EmitMode::Files, false,
178 "What emit Mode to use when none is supplied";
179 make_backup: bool, false, false, "Backup changed files";
180 print_misformatted_file_names: bool, false, true,
181 "Prints the names of mismatched files that were formatted. Prints the names of \
182 files that would be formated when used with `--check` mode. ";
185 #[derive(Error, Debug)]
186 #[error("Could not output config: {0}")]
187 pub struct ToTomlError(toml::ser::Error);
190 pub fn to_toml(&self) -> Result<String, ToTomlError> {
191 // Non-user-facing options can't be specified in TOML
192 let mut cloned = self.clone();
193 cloned.file_lines = None;
194 cloned.verbose = None;
195 cloned.width_heuristics = None;
196 cloned.print_misformatted_file_names = None;
197 cloned.merge_imports = None;
199 ::toml::to_string(&cloned).map_err(ToTomlError)
204 pub(crate) fn version_meets_requirement(&self) -> bool {
205 if self.was_set().required_version() {
206 let version = env!("CARGO_PKG_VERSION");
207 let required_version = self.required_version();
208 if version != required_version {
210 "Error: rustfmt version ({}) doesn't match the required version ({})",
211 version, required_version,
220 /// Constructs a `Config` from the toml file specified at `file_path`.
222 /// This method only looks at the provided path, for a method that
223 /// searches parents for a `rustfmt.toml` see `from_resolved_toml_path`.
225 /// Returns a `Config` if the config could be read and parsed from
226 /// the file, otherwise errors.
227 pub(super) fn from_toml_path(file_path: &Path) -> Result<Config, Error> {
228 let mut file = File::open(&file_path)?;
229 let mut toml = String::new();
230 file.read_to_string(&mut toml)?;
231 Config::from_toml(&toml, file_path.parent().unwrap())
232 .map_err(|err| Error::new(ErrorKind::InvalidData, err))
235 /// Resolves the config for input in `dir`.
237 /// Searches for `rustfmt.toml` beginning with `dir`, and
238 /// recursively checking parents of `dir` if no config file is found.
239 /// If no config file exists in `dir` or in any parent, a
240 /// default `Config` will be returned (and the returned path will be empty).
242 /// Returns the `Config` to use, and the path of the project file if there was
244 pub(super) fn from_resolved_toml_path(dir: &Path) -> Result<(Config, Option<PathBuf>), Error> {
245 /// Try to find a project file in the given directory and its parents.
246 /// Returns the path of a the nearest project file if one exists,
247 /// or `None` if no project file was found.
248 fn resolve_project_file(dir: &Path) -> Result<Option<PathBuf>, Error> {
249 let mut current = if dir.is_relative() {
250 env::current_dir()?.join(dir)
255 current = fs::canonicalize(current)?;
258 match get_toml_path(¤t) {
259 Ok(Some(path)) => return Ok(Some(path)),
260 Err(e) => return Err(e),
264 // If the current directory has no parent, we're done searching.
270 // If nothing was found, check in the home directory.
271 if let Some(home_dir) = dirs::home_dir() {
272 if let Some(path) = get_toml_path(&home_dir)? {
273 return Ok(Some(path));
277 // If none was found ther either, check in the user's configuration directory.
278 if let Some(mut config_dir) = dirs::config_dir() {
279 config_dir.push("rustfmt");
280 if let Some(path) = get_toml_path(&config_dir)? {
281 return Ok(Some(path));
288 match resolve_project_file(dir)? {
289 None => Ok((Config::default(), None)),
290 Some(path) => Config::from_toml_path(&path).map(|config| (config, Some(path))),
294 pub(crate) fn from_toml(toml: &str, dir: &Path) -> Result<Config, String> {
295 let parsed: ::toml::Value = toml
297 .map_err(|e| format!("Could not parse TOML: {}", e))?;
298 let mut err = String::new();
301 .ok_or_else(|| String::from("Parsed config was not table"))?;
302 for key in table.keys() {
303 if !Config::is_valid_name(key) {
304 let msg = &format!("Warning: Unknown configuration option `{}`\n", key);
308 match parsed.try_into() {
309 Ok(parsed_config) => {
313 Ok(Config::default().fill_from_parsed_config(parsed_config, dir))
316 err.push_str("Error: Decoding config file failed:\n");
317 err.push_str(format!("{}\n", e).as_str());
318 err.push_str("Please check your config file.");
325 /// Loads a config by checking the client-supplied options and if appropriate, the
326 /// file system (including searching the file system for overrides).
327 pub fn load_config<O: CliOptions>(
328 file_path: Option<&Path>,
330 ) -> Result<(Config, Option<PathBuf>), Error> {
331 let over_ride = match options {
332 Some(ref opts) => config_path(opts)?,
336 let result = if let Some(over_ride) = over_ride {
337 Config::from_toml_path(over_ride.as_ref()).map(|p| (p, Some(over_ride.to_owned())))
338 } else if let Some(file_path) = file_path {
339 Config::from_resolved_toml_path(file_path)
341 Ok((Config::default(), None))
344 result.map(|(mut c, p)| {
345 if let Some(options) = options {
346 options.apply_to(&mut c);
352 // Check for the presence of known config file names (`rustfmt.toml, `.rustfmt.toml`) in `dir`
354 // Return the path if a config file exists, empty if no file exists, and Error for IO errors
355 fn get_toml_path(dir: &Path) -> Result<Option<PathBuf>, Error> {
356 const CONFIG_FILE_NAMES: [&str; 2] = [".rustfmt.toml", "rustfmt.toml"];
357 for config_file_name in &CONFIG_FILE_NAMES {
358 let config_file = dir.join(config_file_name);
359 match fs::metadata(&config_file) {
360 // Only return if it's a file to handle the unlikely situation of a directory named
362 Ok(ref md) if md.is_file() => return Ok(Some(config_file)),
363 // Return the error if it's something other than `NotFound`; otherwise we didn't
364 // find the project file yet, and continue searching.
366 if e.kind() != ErrorKind::NotFound {
367 let ctx = format!("Failed to get metadata for config file {:?}", &config_file);
368 let err = anyhow::Error::new(e).context(ctx);
369 return Err(Error::new(ErrorKind::Other, err));
378 fn config_path(options: &dyn CliOptions) -> Result<Option<PathBuf>, Error> {
379 let config_path_not_found = |path: &str| -> Result<Option<PathBuf>, Error> {
383 "Error: unable to find a config file for the given path: `{}`",
389 // Read the config_path and convert to parent dir if a file is provided.
390 // If a config file cannot be found from the given path, return error.
391 match options.config_path() {
392 Some(path) if !path.exists() => config_path_not_found(path.to_str().unwrap()),
393 Some(path) if path.is_dir() => {
394 let config_file_path = get_toml_path(path)?;
395 if config_file_path.is_some() {
398 config_path_not_found(path.to_str().unwrap())
401 path => Ok(path.map(ToOwned::to_owned)),
410 use rustfmt_config_proc_macro::{nightly_only_test, stable_only_test};
417 // Options that are used by the generated functions
418 max_width: usize, 100, true, "Maximum width of each line";
419 license_template_path: String, String::default(), false,
420 "Beginning of file must match license template";
421 required_version: String, env!("CARGO_PKG_VERSION").to_owned(), false,
422 "Require a specific version of rustfmt.";
423 ignore: IgnoreList, IgnoreList::default(), false,
424 "Skip formatting the specified files and directories.";
425 verbose: Verbosity, Verbosity::Normal, false,
426 "How much to information to emit to the user";
427 file_lines: FileLines, FileLines::all(), false,
428 "Lines to format; this is not supported in rustfmt.toml, and can only be specified \
429 via the --file-lines option";
431 // merge_imports deprecation
432 imports_granularity: ImportGranularity, ImportGranularity::Preserve, false,
434 merge_imports: bool, false, false, "(deprecated: use imports_granularity instead)";
437 use_small_heuristics: Heuristics, Heuristics::Default, true,
438 "Whether to use different formatting for items and \
439 expressions if they satisfy a heuristic notion of 'small'.";
440 width_heuristics: WidthHeuristics, WidthHeuristics::scaled(100), false,
441 "'small' heuristic values";
443 fn_call_width: usize, 60, true, "Maximum width of the args of a function call before \
444 falling back to vertical formatting.";
445 attr_fn_like_width: usize, 70, true, "Maximum width of the args of a function-like \
446 attributes before falling back to vertical formatting.";
447 struct_lit_width: usize, 18, true, "Maximum width in the body of a struct lit before \
448 falling back to vertical formatting.";
449 struct_variant_width: usize, 35, true, "Maximum width in the body of a struct \
450 variant before falling back to vertical formatting.";
451 array_width: usize, 60, true, "Maximum width of an array literal before falling \
452 back to vertical formatting.";
453 chain_width: usize, 60, true, "Maximum length of a chain to fit on a single line.";
454 single_line_if_else_max_width: usize, 50, true, "Maximum line length for single \
455 line if-else expressions. A value of zero means always break if-else expressions.";
457 // Options that are used by the tests
458 stable_option: bool, false, true, "A stable option";
459 unstable_option: bool, false, false, "An unstable option";
464 fn test_config_set() {
465 let mut config = Config::default();
466 config.set().verbose(Verbosity::Quiet);
467 assert_eq!(config.verbose(), Verbosity::Quiet);
468 config.set().verbose(Verbosity::Normal);
469 assert_eq!(config.verbose(), Verbosity::Normal);
473 fn test_config_used_to_toml() {
474 let config = Config::default();
476 let merge_derives = config.merge_derives();
477 let skip_children = config.skip_children();
479 let used_options = config.used_options();
480 let toml = used_options.to_toml().unwrap();
484 "merge_derives = {}\nskip_children = {}\n",
485 merge_derives, skip_children,
492 let config = Config::from_toml("hard_tabs = true", Path::new("")).unwrap();
494 assert_eq!(config.was_set().hard_tabs(), true);
495 assert_eq!(config.was_set().verbose(), false);
499 fn test_print_docs_exclude_unstable() {
500 use self::mock::Config;
502 let mut output = Vec::new();
503 Config::print_docs(&mut output, false);
505 let s = str::from_utf8(&output).unwrap();
507 assert_eq!(s.contains("stable_option"), true);
508 assert_eq!(s.contains("unstable_option"), false);
509 assert_eq!(s.contains("(unstable)"), false);
513 fn test_print_docs_include_unstable() {
514 use self::mock::Config;
516 let mut output = Vec::new();
517 Config::print_docs(&mut output, true);
519 let s = str::from_utf8(&output).unwrap();
520 assert_eq!(s.contains("stable_option"), true);
521 assert_eq!(s.contains("unstable_option"), true);
522 assert_eq!(s.contains("(unstable)"), true);
526 fn test_empty_string_license_template_path() {
527 let toml = r#"license_template_path = """#;
528 let config = Config::from_toml(toml, Path::new("")).unwrap();
529 assert!(config.license_template.is_none());
534 fn test_valid_license_template_path() {
535 let toml = r#"license_template_path = "tests/license-template/lt.txt""#;
536 let config = Config::from_toml(toml, Path::new("")).unwrap();
537 assert!(config.license_template.is_some());
542 fn test_override_existing_license_with_no_license() {
543 let toml = r#"license_template_path = "tests/license-template/lt.txt""#;
544 let mut config = Config::from_toml(toml, Path::new("")).unwrap();
545 assert!(config.license_template.is_some());
546 config.override_value("license_template_path", "");
547 assert!(config.license_template.is_none());
551 fn test_dump_default_config() {
552 let default_config = format!(
556 newline_style = "Auto"
557 indent_style = "Block"
558 use_small_heuristics = "Default"
560 attr_fn_like_width = 70
561 struct_lit_width = 18
562 struct_variant_width = 35
565 single_line_if_else_max_width = 50
566 wrap_comments = false
567 format_code_in_doc_comments = false
569 normalize_comments = false
570 normalize_doc_attributes = false
571 license_template_path = ""
572 format_strings = false
573 format_macro_matchers = false
574 format_macro_bodies = true
575 hex_literal_case = "Preserve"
576 empty_item_single_line = true
577 struct_lit_single_line = true
578 fn_single_line = false
579 where_single_line = false
580 imports_indent = "Block"
581 imports_layout = "Mixed"
582 imports_granularity = "Preserve"
583 group_imports = "Preserve"
584 reorder_imports = true
585 reorder_modules = true
586 reorder_impl_items = false
587 type_punctuation_density = "Wide"
588 space_before_colon = false
589 space_after_colon = true
590 spaces_around_ranges = false
591 binop_separator = "Front"
592 remove_nested_parens = true
593 combine_control_expr = true
594 short_array_element_width_threshold = 10
595 overflow_delimited_expr = false
596 struct_field_align_threshold = 0
597 enum_discrim_align_threshold = 0
598 match_arm_blocks = true
599 match_arm_leading_pipes = "Never"
600 force_multiline_blocks = false
601 fn_args_layout = "Tall"
602 brace_style = "SameLineWhere"
603 control_brace_style = "AlwaysSameLine"
604 trailing_semicolon = true
605 trailing_comma = "Vertical"
606 match_block_trailing_comma = false
607 blank_lines_upper_bound = 1
608 blank_lines_lower_bound = 0
611 inline_attribute_width = 0
612 format_generated_files = true
614 use_try_shorthand = false
615 use_field_init_shorthand = false
616 force_explicit_abi = true
617 condense_wildcard_suffixes = false
619 required_version = "{}"
620 unstable_features = false
621 disable_all_formatting = false
622 skip_children = false
623 hide_parse_errors = false
624 error_on_line_overflow = false
625 error_on_unformatted = false
626 report_fixme = "Never"
631 env!("CARGO_PKG_VERSION")
633 let toml = Config::default().all_options().to_toml().unwrap();
634 assert_eq!(&toml, &default_config);
639 fn test_as_not_nightly_channel() {
640 let mut config = Config::default();
641 assert_eq!(config.was_set().unstable_features(), false);
642 config.set().unstable_features(true);
643 assert_eq!(config.was_set().unstable_features(), false);
648 fn test_as_nightly_channel() {
649 let mut config = Config::default();
650 config.set().unstable_features(true);
651 // When we don't set the config from toml or command line options it
652 // doesn't get marked as set by the user.
653 assert_eq!(config.was_set().unstable_features(), false);
654 config.set().unstable_features(true);
655 assert_eq!(config.unstable_features(), true);
660 fn test_unstable_from_toml() {
661 let config = Config::from_toml("unstable_features = true", Path::new("")).unwrap();
662 assert_eq!(config.was_set().unstable_features(), true);
663 assert_eq!(config.unstable_features(), true);
667 mod deprecated_option_merge_imports {
672 fn test_old_option_set() {
674 unstable_features = true
677 let config = Config::from_toml(toml, Path::new("")).unwrap();
678 assert_eq!(config.imports_granularity(), ImportGranularity::Crate);
685 unstable_features = true
687 imports_granularity = "Preserve"
689 let config = Config::from_toml(toml, Path::new("")).unwrap();
690 assert_eq!(config.imports_granularity(), ImportGranularity::Preserve);
695 fn test_new_overridden() {
697 unstable_features = true
700 let mut config = Config::from_toml(toml, Path::new("")).unwrap();
701 config.override_value("imports_granularity", "Preserve");
702 assert_eq!(config.imports_granularity(), ImportGranularity::Preserve);
707 fn test_old_overridden() {
709 unstable_features = true
710 imports_granularity = "Module"
712 let mut config = Config::from_toml(toml, Path::new("")).unwrap();
713 config.override_value("merge_imports", "true");
714 // no effect: the new option always takes precedence
715 assert_eq!(config.imports_granularity(), ImportGranularity::Module);
720 mod use_small_heuristics {
724 fn test_default_sets_correct_widths() {
726 use_small_heuristics = "Default"
729 let config = Config::from_toml(toml, Path::new("")).unwrap();
730 assert_eq!(config.array_width(), 120);
731 assert_eq!(config.attr_fn_like_width(), 140);
732 assert_eq!(config.chain_width(), 120);
733 assert_eq!(config.fn_call_width(), 120);
734 assert_eq!(config.single_line_if_else_max_width(), 100);
735 assert_eq!(config.struct_lit_width(), 36);
736 assert_eq!(config.struct_variant_width(), 70);
740 fn test_max_sets_correct_widths() {
742 use_small_heuristics = "Max"
745 let config = Config::from_toml(toml, Path::new("")).unwrap();
746 assert_eq!(config.array_width(), 120);
747 assert_eq!(config.attr_fn_like_width(), 120);
748 assert_eq!(config.chain_width(), 120);
749 assert_eq!(config.fn_call_width(), 120);
750 assert_eq!(config.single_line_if_else_max_width(), 120);
751 assert_eq!(config.struct_lit_width(), 120);
752 assert_eq!(config.struct_variant_width(), 120);
756 fn test_off_sets_correct_widths() {
758 use_small_heuristics = "Off"
761 let config = Config::from_toml(toml, Path::new("")).unwrap();
762 assert_eq!(config.array_width(), usize::max_value());
763 assert_eq!(config.attr_fn_like_width(), usize::max_value());
764 assert_eq!(config.chain_width(), usize::max_value());
765 assert_eq!(config.fn_call_width(), usize::max_value());
766 assert_eq!(config.single_line_if_else_max_width(), 0);
767 assert_eq!(config.struct_lit_width(), 0);
768 assert_eq!(config.struct_variant_width(), 0);
772 fn test_override_works_with_default() {
774 use_small_heuristics = "Default"
776 attr_fn_like_width = 40
779 single_line_if_else_max_width = 40
780 struct_lit_width = 30
781 struct_variant_width = 34
783 let config = Config::from_toml(toml, Path::new("")).unwrap();
784 assert_eq!(config.array_width(), 20);
785 assert_eq!(config.attr_fn_like_width(), 40);
786 assert_eq!(config.chain_width(), 20);
787 assert_eq!(config.fn_call_width(), 90);
788 assert_eq!(config.single_line_if_else_max_width(), 40);
789 assert_eq!(config.struct_lit_width(), 30);
790 assert_eq!(config.struct_variant_width(), 34);
794 fn test_override_with_max() {
796 use_small_heuristics = "Max"
798 attr_fn_like_width = 40
801 single_line_if_else_max_width = 40
802 struct_lit_width = 30
803 struct_variant_width = 34
805 let config = Config::from_toml(toml, Path::new("")).unwrap();
806 assert_eq!(config.array_width(), 20);
807 assert_eq!(config.attr_fn_like_width(), 40);
808 assert_eq!(config.chain_width(), 20);
809 assert_eq!(config.fn_call_width(), 90);
810 assert_eq!(config.single_line_if_else_max_width(), 40);
811 assert_eq!(config.struct_lit_width(), 30);
812 assert_eq!(config.struct_variant_width(), 34);
816 fn test_override_with_off() {
818 use_small_heuristics = "Off"
820 attr_fn_like_width = 40
823 single_line_if_else_max_width = 40
824 struct_lit_width = 30
825 struct_variant_width = 34
827 let config = Config::from_toml(toml, Path::new("")).unwrap();
828 assert_eq!(config.array_width(), 20);
829 assert_eq!(config.attr_fn_like_width(), 40);
830 assert_eq!(config.chain_width(), 20);
831 assert_eq!(config.fn_call_width(), 90);
832 assert_eq!(config.single_line_if_else_max_width(), 40);
833 assert_eq!(config.struct_lit_width(), 30);
834 assert_eq!(config.struct_variant_width(), 34);
838 fn test_fn_call_width_config_exceeds_max_width() {
843 let config = Config::from_toml(toml, Path::new("")).unwrap();
844 assert_eq!(config.fn_call_width(), 90);
848 fn test_attr_fn_like_width_config_exceeds_max_width() {
851 attr_fn_like_width = 90
853 let config = Config::from_toml(toml, Path::new("")).unwrap();
854 assert_eq!(config.attr_fn_like_width(), 80);
858 fn test_struct_lit_config_exceeds_max_width() {
861 struct_lit_width = 90
863 let config = Config::from_toml(toml, Path::new("")).unwrap();
864 assert_eq!(config.struct_lit_width(), 78);
868 fn test_struct_variant_width_config_exceeds_max_width() {
871 struct_variant_width = 90
873 let config = Config::from_toml(toml, Path::new("")).unwrap();
874 assert_eq!(config.struct_variant_width(), 80);
878 fn test_array_width_config_exceeds_max_width() {
883 let config = Config::from_toml(toml, Path::new("")).unwrap();
884 assert_eq!(config.array_width(), 60);
888 fn test_chain_width_config_exceeds_max_width() {
893 let config = Config::from_toml(toml, Path::new("")).unwrap();
894 assert_eq!(config.chain_width(), 80);
898 fn test_single_line_if_else_max_width_config_exceeds_max_width() {
901 single_line_if_else_max_width = 90
903 let config = Config::from_toml(toml, Path::new("")).unwrap();
904 assert_eq!(config.single_line_if_else_max_width(), 70);
908 fn test_override_fn_call_width_exceeds_max_width() {
909 let mut config = Config::default();
910 config.override_value("fn_call_width", "101");
911 assert_eq!(config.fn_call_width(), 100);
915 fn test_override_attr_fn_like_width_exceeds_max_width() {
916 let mut config = Config::default();
917 config.override_value("attr_fn_like_width", "101");
918 assert_eq!(config.attr_fn_like_width(), 100);
922 fn test_override_struct_lit_exceeds_max_width() {
923 let mut config = Config::default();
924 config.override_value("struct_lit_width", "101");
925 assert_eq!(config.struct_lit_width(), 100);
929 fn test_override_struct_variant_width_exceeds_max_width() {
930 let mut config = Config::default();
931 config.override_value("struct_variant_width", "101");
932 assert_eq!(config.struct_variant_width(), 100);
936 fn test_override_array_width_exceeds_max_width() {
937 let mut config = Config::default();
938 config.override_value("array_width", "101");
939 assert_eq!(config.array_width(), 100);
943 fn test_override_chain_width_exceeds_max_width() {
944 let mut config = Config::default();
945 config.override_value("chain_width", "101");
946 assert_eq!(config.chain_width(), 100);
950 fn test_override_single_line_if_else_max_width_exceeds_max_width() {
951 let mut config = Config::default();
952 config.override_value("single_line_if_else_max_width", "101");
953 assert_eq!(config.single_line_if_else_max_width(), 100);