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_todo: ReportTactic, ReportTactic::Never, false,
168 "Report all, none or unnumbered occurrences of TODO in source file comments";
169 report_fixme: ReportTactic, ReportTactic::Never, false,
170 "Report all, none or unnumbered occurrences of FIXME in source file comments";
171 ignore: IgnoreList, IgnoreList::default(), false,
172 "Skip formatting the specified files and directories";
175 verbose: Verbosity, Verbosity::Normal, false, "How much to information to emit to the user";
176 file_lines: FileLines, FileLines::all(), false,
177 "Lines to format; this is not supported in rustfmt.toml, and can only be specified \
178 via the --file-lines option";
179 emit_mode: EmitMode, EmitMode::Files, false,
180 "What emit Mode to use when none is supplied";
181 make_backup: bool, false, false, "Backup changed files";
182 print_misformatted_file_names: bool, false, true,
183 "Prints the names of mismatched files that were formatted. Prints the names of \
184 files that would be formated when used with `--check` mode. ";
187 #[derive(Error, Debug)]
188 #[error("Could not output config: {0}")]
189 pub struct ToTomlError(toml::ser::Error);
192 pub fn to_toml(&self) -> Result<String, ToTomlError> {
193 // Non-user-facing options can't be specified in TOML
194 let mut cloned = self.clone();
195 cloned.file_lines = None;
196 cloned.verbose = None;
197 cloned.width_heuristics = None;
198 cloned.print_misformatted_file_names = None;
199 cloned.merge_imports = None;
201 ::toml::to_string(&cloned).map_err(ToTomlError)
206 pub(crate) fn version_meets_requirement(&self) -> bool {
207 if self.was_set().required_version() {
208 let version = env!("CARGO_PKG_VERSION");
209 let required_version = self.required_version();
210 if version != required_version {
212 "Error: rustfmt version ({}) doesn't match the required version ({})",
213 version, required_version,
222 /// Constructs a `Config` from the toml file specified at `file_path`.
224 /// This method only looks at the provided path, for a method that
225 /// searches parents for a `rustfmt.toml` see `from_resolved_toml_path`.
227 /// Returns a `Config` if the config could be read and parsed from
228 /// the file, otherwise errors.
229 pub(super) fn from_toml_path(file_path: &Path) -> Result<Config, Error> {
230 let mut file = File::open(&file_path)?;
231 let mut toml = String::new();
232 file.read_to_string(&mut toml)?;
233 Config::from_toml(&toml, file_path.parent().unwrap())
234 .map_err(|err| Error::new(ErrorKind::InvalidData, err))
237 /// Resolves the config for input in `dir`.
239 /// Searches for `rustfmt.toml` beginning with `dir`, and
240 /// recursively checking parents of `dir` if no config file is found.
241 /// If no config file exists in `dir` or in any parent, a
242 /// default `Config` will be returned (and the returned path will be empty).
244 /// Returns the `Config` to use, and the path of the project file if there was
246 pub(super) fn from_resolved_toml_path(dir: &Path) -> Result<(Config, Option<PathBuf>), Error> {
247 /// Try to find a project file in the given directory and its parents.
248 /// Returns the path of a the nearest project file if one exists,
249 /// or `None` if no project file was found.
250 fn resolve_project_file(dir: &Path) -> Result<Option<PathBuf>, Error> {
251 let mut current = if dir.is_relative() {
252 env::current_dir()?.join(dir)
257 current = fs::canonicalize(current)?;
260 match get_toml_path(¤t) {
261 Ok(Some(path)) => return Ok(Some(path)),
262 Err(e) => return Err(e),
266 // If the current directory has no parent, we're done searching.
272 // If nothing was found, check in the home directory.
273 if let Some(home_dir) = dirs::home_dir() {
274 if let Some(path) = get_toml_path(&home_dir)? {
275 return Ok(Some(path));
279 // If none was found ther either, check in the user's configuration directory.
280 if let Some(mut config_dir) = dirs::config_dir() {
281 config_dir.push("rustfmt");
282 if let Some(path) = get_toml_path(&config_dir)? {
283 return Ok(Some(path));
290 match resolve_project_file(dir)? {
291 None => Ok((Config::default(), None)),
292 Some(path) => Config::from_toml_path(&path).map(|config| (config, Some(path))),
296 pub(crate) fn from_toml(toml: &str, dir: &Path) -> Result<Config, String> {
297 let parsed: ::toml::Value = toml
299 .map_err(|e| format!("Could not parse TOML: {}", e))?;
300 let mut err = String::new();
303 .ok_or_else(|| String::from("Parsed config was not table"))?;
304 for key in table.keys() {
305 if !Config::is_valid_name(key) {
306 let msg = &format!("Warning: Unknown configuration option `{}`\n", key);
310 match parsed.try_into() {
311 Ok(parsed_config) => {
315 Ok(Config::default().fill_from_parsed_config(parsed_config, dir))
318 err.push_str("Error: Decoding config file failed:\n");
319 err.push_str(format!("{}\n", e).as_str());
320 err.push_str("Please check your config file.");
327 /// Loads a config by checking the client-supplied options and if appropriate, the
328 /// file system (including searching the file system for overrides).
329 pub fn load_config<O: CliOptions>(
330 file_path: Option<&Path>,
332 ) -> Result<(Config, Option<PathBuf>), Error> {
333 let over_ride = match options {
334 Some(ref opts) => config_path(opts)?,
338 let result = if let Some(over_ride) = over_ride {
339 Config::from_toml_path(over_ride.as_ref()).map(|p| (p, Some(over_ride.to_owned())))
340 } else if let Some(file_path) = file_path {
341 Config::from_resolved_toml_path(file_path)
343 Ok((Config::default(), None))
346 result.map(|(mut c, p)| {
347 if let Some(options) = options {
348 options.apply_to(&mut c);
354 // Check for the presence of known config file names (`rustfmt.toml, `.rustfmt.toml`) in `dir`
356 // Return the path if a config file exists, empty if no file exists, and Error for IO errors
357 fn get_toml_path(dir: &Path) -> Result<Option<PathBuf>, Error> {
358 const CONFIG_FILE_NAMES: [&str; 2] = [".rustfmt.toml", "rustfmt.toml"];
359 for config_file_name in &CONFIG_FILE_NAMES {
360 let config_file = dir.join(config_file_name);
361 match fs::metadata(&config_file) {
362 // Only return if it's a file to handle the unlikely situation of a directory named
364 Ok(ref md) if md.is_file() => return Ok(Some(config_file)),
365 // Return the error if it's something other than `NotFound`; otherwise we didn't
366 // find the project file yet, and continue searching.
368 if e.kind() != ErrorKind::NotFound {
369 let ctx = format!("Failed to get metadata for config file {:?}", &config_file);
370 let err = anyhow::Error::new(e).context(ctx);
371 return Err(Error::new(ErrorKind::Other, err));
380 fn config_path(options: &dyn CliOptions) -> Result<Option<PathBuf>, Error> {
381 let config_path_not_found = |path: &str| -> Result<Option<PathBuf>, Error> {
385 "Error: unable to find a config file for the given path: `{}`",
391 // Read the config_path and convert to parent dir if a file is provided.
392 // If a config file cannot be found from the given path, return error.
393 match options.config_path() {
394 Some(path) if !path.exists() => config_path_not_found(path.to_str().unwrap()),
395 Some(path) if path.is_dir() => {
396 let config_file_path = get_toml_path(path)?;
397 if config_file_path.is_some() {
400 config_path_not_found(path.to_str().unwrap())
403 path => Ok(path.map(ToOwned::to_owned)),
412 use rustfmt_config_proc_macro::{nightly_only_test, stable_only_test};
419 // Options that are used by the generated functions
420 max_width: usize, 100, true, "Maximum width of each line";
421 license_template_path: String, String::default(), false,
422 "Beginning of file must match license template";
423 required_version: String, env!("CARGO_PKG_VERSION").to_owned(), false,
424 "Require a specific version of rustfmt.";
425 ignore: IgnoreList, IgnoreList::default(), false,
426 "Skip formatting the specified files and directories.";
427 verbose: Verbosity, Verbosity::Normal, false,
428 "How much to information to emit to the user";
429 file_lines: FileLines, FileLines::all(), false,
430 "Lines to format; this is not supported in rustfmt.toml, and can only be specified \
431 via the --file-lines option";
433 // merge_imports deprecation
434 imports_granularity: ImportGranularity, ImportGranularity::Preserve, false,
436 merge_imports: bool, false, false, "(deprecated: use imports_granularity instead)";
439 use_small_heuristics: Heuristics, Heuristics::Default, true,
440 "Whether to use different formatting for items and \
441 expressions if they satisfy a heuristic notion of 'small'.";
442 width_heuristics: WidthHeuristics, WidthHeuristics::scaled(100), false,
443 "'small' heuristic values";
445 fn_call_width: usize, 60, true, "Maximum width of the args of a function call before \
446 falling back to vertical formatting.";
447 attr_fn_like_width: usize, 70, true, "Maximum width of the args of a function-like \
448 attributes before falling back to vertical formatting.";
449 struct_lit_width: usize, 18, true, "Maximum width in the body of a struct lit before \
450 falling back to vertical formatting.";
451 struct_variant_width: usize, 35, true, "Maximum width in the body of a struct \
452 variant before falling back to vertical formatting.";
453 array_width: usize, 60, true, "Maximum width of an array literal before falling \
454 back to vertical formatting.";
455 chain_width: usize, 60, true, "Maximum length of a chain to fit on a single line.";
456 single_line_if_else_max_width: usize, 50, true, "Maximum line length for single \
457 line if-else expressions. A value of zero means always break if-else expressions.";
459 // Options that are used by the tests
460 stable_option: bool, false, true, "A stable option";
461 unstable_option: bool, false, false, "An unstable option";
466 fn test_config_set() {
467 let mut config = Config::default();
468 config.set().verbose(Verbosity::Quiet);
469 assert_eq!(config.verbose(), Verbosity::Quiet);
470 config.set().verbose(Verbosity::Normal);
471 assert_eq!(config.verbose(), Verbosity::Normal);
475 fn test_config_used_to_toml() {
476 let config = Config::default();
478 let merge_derives = config.merge_derives();
479 let skip_children = config.skip_children();
481 let used_options = config.used_options();
482 let toml = used_options.to_toml().unwrap();
486 "merge_derives = {}\nskip_children = {}\n",
487 merge_derives, skip_children,
494 let config = Config::from_toml("hard_tabs = true", Path::new("")).unwrap();
496 assert_eq!(config.was_set().hard_tabs(), true);
497 assert_eq!(config.was_set().verbose(), false);
501 fn test_print_docs_exclude_unstable() {
502 use self::mock::Config;
504 let mut output = Vec::new();
505 Config::print_docs(&mut output, false);
507 let s = str::from_utf8(&output).unwrap();
509 assert_eq!(s.contains("stable_option"), true);
510 assert_eq!(s.contains("unstable_option"), false);
511 assert_eq!(s.contains("(unstable)"), false);
515 fn test_print_docs_include_unstable() {
516 use self::mock::Config;
518 let mut output = Vec::new();
519 Config::print_docs(&mut output, true);
521 let s = str::from_utf8(&output).unwrap();
522 assert_eq!(s.contains("stable_option"), true);
523 assert_eq!(s.contains("unstable_option"), true);
524 assert_eq!(s.contains("(unstable)"), true);
528 fn test_empty_string_license_template_path() {
529 let toml = r#"license_template_path = """#;
530 let config = Config::from_toml(toml, Path::new("")).unwrap();
531 assert!(config.license_template.is_none());
536 fn test_valid_license_template_path() {
537 let toml = r#"license_template_path = "tests/license-template/lt.txt""#;
538 let config = Config::from_toml(toml, Path::new("")).unwrap();
539 assert!(config.license_template.is_some());
544 fn test_override_existing_license_with_no_license() {
545 let toml = r#"license_template_path = "tests/license-template/lt.txt""#;
546 let mut config = Config::from_toml(toml, Path::new("")).unwrap();
547 assert!(config.license_template.is_some());
548 config.override_value("license_template_path", "");
549 assert!(config.license_template.is_none());
553 fn test_dump_default_config() {
554 let default_config = format!(
558 newline_style = "Auto"
559 indent_style = "Block"
560 use_small_heuristics = "Default"
562 attr_fn_like_width = 70
563 struct_lit_width = 18
564 struct_variant_width = 35
567 single_line_if_else_max_width = 50
568 wrap_comments = false
569 format_code_in_doc_comments = false
571 normalize_comments = false
572 normalize_doc_attributes = false
573 license_template_path = ""
574 format_strings = false
575 format_macro_matchers = false
576 format_macro_bodies = true
577 hex_literal_case = "Preserve"
578 empty_item_single_line = true
579 struct_lit_single_line = true
580 fn_single_line = false
581 where_single_line = false
582 imports_indent = "Block"
583 imports_layout = "Mixed"
584 imports_granularity = "Preserve"
585 group_imports = "Preserve"
586 reorder_imports = true
587 reorder_modules = true
588 reorder_impl_items = false
589 type_punctuation_density = "Wide"
590 space_before_colon = false
591 space_after_colon = true
592 spaces_around_ranges = false
593 binop_separator = "Front"
594 remove_nested_parens = true
595 combine_control_expr = true
596 short_array_element_width_threshold = 10
597 overflow_delimited_expr = false
598 struct_field_align_threshold = 0
599 enum_discrim_align_threshold = 0
600 match_arm_blocks = true
601 match_arm_leading_pipes = "Never"
602 force_multiline_blocks = false
603 fn_args_layout = "Tall"
604 brace_style = "SameLineWhere"
605 control_brace_style = "AlwaysSameLine"
606 trailing_semicolon = true
607 trailing_comma = "Vertical"
608 match_block_trailing_comma = false
609 blank_lines_upper_bound = 1
610 blank_lines_lower_bound = 0
613 inline_attribute_width = 0
614 format_generated_files = true
616 use_try_shorthand = false
617 use_field_init_shorthand = false
618 force_explicit_abi = true
619 condense_wildcard_suffixes = false
621 required_version = "{}"
622 unstable_features = false
623 disable_all_formatting = false
624 skip_children = false
625 hide_parse_errors = false
626 error_on_line_overflow = false
627 error_on_unformatted = false
628 report_todo = "Never"
629 report_fixme = "Never"
634 env!("CARGO_PKG_VERSION")
636 let toml = Config::default().all_options().to_toml().unwrap();
637 assert_eq!(&toml, &default_config);
642 fn test_as_not_nightly_channel() {
643 let mut config = Config::default();
644 assert_eq!(config.was_set().unstable_features(), false);
645 config.set().unstable_features(true);
646 assert_eq!(config.was_set().unstable_features(), false);
651 fn test_as_nightly_channel() {
652 let mut config = Config::default();
653 config.set().unstable_features(true);
654 // When we don't set the config from toml or command line options it
655 // doesn't get marked as set by the user.
656 assert_eq!(config.was_set().unstable_features(), false);
657 config.set().unstable_features(true);
658 assert_eq!(config.unstable_features(), true);
663 fn test_unstable_from_toml() {
664 let config = Config::from_toml("unstable_features = true", Path::new("")).unwrap();
665 assert_eq!(config.was_set().unstable_features(), true);
666 assert_eq!(config.unstable_features(), true);
670 mod deprecated_option_merge_imports {
675 fn test_old_option_set() {
677 unstable_features = true
680 let config = Config::from_toml(toml, Path::new("")).unwrap();
681 assert_eq!(config.imports_granularity(), ImportGranularity::Crate);
688 unstable_features = true
690 imports_granularity = "Preserve"
692 let config = Config::from_toml(toml, Path::new("")).unwrap();
693 assert_eq!(config.imports_granularity(), ImportGranularity::Preserve);
698 fn test_new_overridden() {
700 unstable_features = true
703 let mut config = Config::from_toml(toml, Path::new("")).unwrap();
704 config.override_value("imports_granularity", "Preserve");
705 assert_eq!(config.imports_granularity(), ImportGranularity::Preserve);
710 fn test_old_overridden() {
712 unstable_features = true
713 imports_granularity = "Module"
715 let mut config = Config::from_toml(toml, Path::new("")).unwrap();
716 config.override_value("merge_imports", "true");
717 // no effect: the new option always takes precedence
718 assert_eq!(config.imports_granularity(), ImportGranularity::Module);
723 mod use_small_heuristics {
727 fn test_default_sets_correct_widths() {
729 use_small_heuristics = "Default"
732 let config = Config::from_toml(toml, Path::new("")).unwrap();
733 assert_eq!(config.array_width(), 120);
734 assert_eq!(config.attr_fn_like_width(), 140);
735 assert_eq!(config.chain_width(), 120);
736 assert_eq!(config.fn_call_width(), 120);
737 assert_eq!(config.single_line_if_else_max_width(), 100);
738 assert_eq!(config.struct_lit_width(), 36);
739 assert_eq!(config.struct_variant_width(), 70);
743 fn test_max_sets_correct_widths() {
745 use_small_heuristics = "Max"
748 let config = Config::from_toml(toml, Path::new("")).unwrap();
749 assert_eq!(config.array_width(), 120);
750 assert_eq!(config.attr_fn_like_width(), 120);
751 assert_eq!(config.chain_width(), 120);
752 assert_eq!(config.fn_call_width(), 120);
753 assert_eq!(config.single_line_if_else_max_width(), 120);
754 assert_eq!(config.struct_lit_width(), 120);
755 assert_eq!(config.struct_variant_width(), 120);
759 fn test_off_sets_correct_widths() {
761 use_small_heuristics = "Off"
764 let config = Config::from_toml(toml, Path::new("")).unwrap();
765 assert_eq!(config.array_width(), usize::max_value());
766 assert_eq!(config.attr_fn_like_width(), usize::max_value());
767 assert_eq!(config.chain_width(), usize::max_value());
768 assert_eq!(config.fn_call_width(), usize::max_value());
769 assert_eq!(config.single_line_if_else_max_width(), 0);
770 assert_eq!(config.struct_lit_width(), 0);
771 assert_eq!(config.struct_variant_width(), 0);
775 fn test_override_works_with_default() {
777 use_small_heuristics = "Default"
779 attr_fn_like_width = 40
782 single_line_if_else_max_width = 40
783 struct_lit_width = 30
784 struct_variant_width = 34
786 let config = Config::from_toml(toml, Path::new("")).unwrap();
787 assert_eq!(config.array_width(), 20);
788 assert_eq!(config.attr_fn_like_width(), 40);
789 assert_eq!(config.chain_width(), 20);
790 assert_eq!(config.fn_call_width(), 90);
791 assert_eq!(config.single_line_if_else_max_width(), 40);
792 assert_eq!(config.struct_lit_width(), 30);
793 assert_eq!(config.struct_variant_width(), 34);
797 fn test_override_with_max() {
799 use_small_heuristics = "Max"
801 attr_fn_like_width = 40
804 single_line_if_else_max_width = 40
805 struct_lit_width = 30
806 struct_variant_width = 34
808 let config = Config::from_toml(toml, Path::new("")).unwrap();
809 assert_eq!(config.array_width(), 20);
810 assert_eq!(config.attr_fn_like_width(), 40);
811 assert_eq!(config.chain_width(), 20);
812 assert_eq!(config.fn_call_width(), 90);
813 assert_eq!(config.single_line_if_else_max_width(), 40);
814 assert_eq!(config.struct_lit_width(), 30);
815 assert_eq!(config.struct_variant_width(), 34);
819 fn test_override_with_off() {
821 use_small_heuristics = "Off"
823 attr_fn_like_width = 40
826 single_line_if_else_max_width = 40
827 struct_lit_width = 30
828 struct_variant_width = 34
830 let config = Config::from_toml(toml, Path::new("")).unwrap();
831 assert_eq!(config.array_width(), 20);
832 assert_eq!(config.attr_fn_like_width(), 40);
833 assert_eq!(config.chain_width(), 20);
834 assert_eq!(config.fn_call_width(), 90);
835 assert_eq!(config.single_line_if_else_max_width(), 40);
836 assert_eq!(config.struct_lit_width(), 30);
837 assert_eq!(config.struct_variant_width(), 34);
841 fn test_fn_call_width_config_exceeds_max_width() {
846 let config = Config::from_toml(toml, Path::new("")).unwrap();
847 assert_eq!(config.fn_call_width(), 90);
851 fn test_attr_fn_like_width_config_exceeds_max_width() {
854 attr_fn_like_width = 90
856 let config = Config::from_toml(toml, Path::new("")).unwrap();
857 assert_eq!(config.attr_fn_like_width(), 80);
861 fn test_struct_lit_config_exceeds_max_width() {
864 struct_lit_width = 90
866 let config = Config::from_toml(toml, Path::new("")).unwrap();
867 assert_eq!(config.struct_lit_width(), 78);
871 fn test_struct_variant_width_config_exceeds_max_width() {
874 struct_variant_width = 90
876 let config = Config::from_toml(toml, Path::new("")).unwrap();
877 assert_eq!(config.struct_variant_width(), 80);
881 fn test_array_width_config_exceeds_max_width() {
886 let config = Config::from_toml(toml, Path::new("")).unwrap();
887 assert_eq!(config.array_width(), 60);
891 fn test_chain_width_config_exceeds_max_width() {
896 let config = Config::from_toml(toml, Path::new("")).unwrap();
897 assert_eq!(config.chain_width(), 80);
901 fn test_single_line_if_else_max_width_config_exceeds_max_width() {
904 single_line_if_else_max_width = 90
906 let config = Config::from_toml(toml, Path::new("")).unwrap();
907 assert_eq!(config.single_line_if_else_max_width(), 70);
911 fn test_override_fn_call_width_exceeds_max_width() {
912 let mut config = Config::default();
913 config.override_value("fn_call_width", "101");
914 assert_eq!(config.fn_call_width(), 100);
918 fn test_override_attr_fn_like_width_exceeds_max_width() {
919 let mut config = Config::default();
920 config.override_value("attr_fn_like_width", "101");
921 assert_eq!(config.attr_fn_like_width(), 100);
925 fn test_override_struct_lit_exceeds_max_width() {
926 let mut config = Config::default();
927 config.override_value("struct_lit_width", "101");
928 assert_eq!(config.struct_lit_width(), 100);
932 fn test_override_struct_variant_width_exceeds_max_width() {
933 let mut config = Config::default();
934 config.override_value("struct_variant_width", "101");
935 assert_eq!(config.struct_variant_width(), 100);
939 fn test_override_array_width_exceeds_max_width() {
940 let mut config = Config::default();
941 config.override_value("array_width", "101");
942 assert_eq!(config.array_width(), 100);
946 fn test_override_chain_width_exceeds_max_width() {
947 let mut config = Config::default();
948 config.override_value("chain_width", "101");
949 assert_eq!(config.chain_width(), 100);
953 fn test_override_single_line_if_else_max_width_exceeds_max_width() {
954 let mut config = Config::default();
955 config.override_value("single_line_if_else_max_width", "101");
956 assert_eq!(config.single_line_if_else_max_width(), 100);