diff options
Diffstat (limited to 'src/tools/rustfmt/src/config/mod.rs')
| -rw-r--r-- | src/tools/rustfmt/src/config/mod.rs | 924 |
1 files changed, 924 insertions, 0 deletions
diff --git a/src/tools/rustfmt/src/config/mod.rs b/src/tools/rustfmt/src/config/mod.rs new file mode 100644 index 000000000..f49c18d3a --- /dev/null +++ b/src/tools/rustfmt/src/config/mod.rs @@ -0,0 +1,924 @@ +use std::cell::Cell; +use std::default::Default; +use std::fs::File; +use std::io::{Error, ErrorKind, Read}; +use std::path::{Path, PathBuf}; +use std::{env, fs}; + +use thiserror::Error; + +use crate::config::config_type::ConfigType; +#[allow(unreachable_pub)] +pub use crate::config::file_lines::{FileLines, FileName, Range}; +#[allow(unreachable_pub)] +pub use crate::config::lists::*; +#[allow(unreachable_pub)] +pub use crate::config::options::*; + +#[macro_use] +pub(crate) mod config_type; +#[macro_use] +pub(crate) mod options; + +pub(crate) mod file_lines; +pub(crate) mod lists; + +// This macro defines configuration options used in rustfmt. Each option +// is defined as follows: +// +// `name: value type, default value, is stable, description;` +create_config! { + // Fundamental stuff + max_width: usize, 100, true, "Maximum width of each line"; + hard_tabs: bool, false, true, "Use tab characters for indentation, spaces for alignment"; + tab_spaces: usize, 4, true, "Number of spaces per tab"; + newline_style: NewlineStyle, NewlineStyle::Auto, true, "Unix or Windows line endings"; + indent_style: IndentStyle, IndentStyle::Block, false, "How do we indent expressions or items"; + + // Width Heuristics + use_small_heuristics: Heuristics, Heuristics::Default, true, "Whether to use different \ + formatting for items and expressions if they satisfy a heuristic notion of 'small'"; + width_heuristics: WidthHeuristics, WidthHeuristics::scaled(100), false, + "'small' heuristic values"; + fn_call_width: usize, 60, true, "Maximum width of the args of a function call before \ + falling back to vertical formatting."; + attr_fn_like_width: usize, 70, true, "Maximum width of the args of a function-like \ + attributes before falling back to vertical formatting."; + struct_lit_width: usize, 18, true, "Maximum width in the body of a struct lit before \ + falling back to vertical formatting."; + struct_variant_width: usize, 35, true, "Maximum width in the body of a struct variant before \ + falling back to vertical formatting."; + array_width: usize, 60, true, "Maximum width of an array literal before falling \ + back to vertical formatting."; + chain_width: usize, 60, true, "Maximum length of a chain to fit on a single line."; + single_line_if_else_max_width: usize, 50, true, "Maximum line length for single line if-else \ + expressions. A value of zero means always break if-else expressions."; + + // Comments. macros, and strings + wrap_comments: bool, false, false, "Break comments to fit on the line"; + format_code_in_doc_comments: bool, false, false, "Format the code snippet in doc comments."; + doc_comment_code_block_width: usize, 100, false, "Maximum width for code snippets in doc \ + comments. No effect unless format_code_in_doc_comments = true"; + comment_width: usize, 80, false, + "Maximum length of comments. No effect unless wrap_comments = true"; + normalize_comments: bool, false, false, "Convert /* */ comments to // comments where possible"; + normalize_doc_attributes: bool, false, false, "Normalize doc attributes as doc comments"; + format_strings: bool, false, false, "Format string literals where necessary"; + format_macro_matchers: bool, false, false, + "Format the metavariable matching patterns in macros"; + format_macro_bodies: bool, true, false, "Format the bodies of macros"; + hex_literal_case: HexLiteralCase, HexLiteralCase::Preserve, false, + "Format hexadecimal integer literals"; + + // Single line expressions and items + empty_item_single_line: bool, true, false, + "Put empty-body functions and impls on a single line"; + struct_lit_single_line: bool, true, false, + "Put small struct literals on a single line"; + fn_single_line: bool, false, false, "Put single-expression functions on a single line"; + where_single_line: bool, false, false, "Force where-clauses to be on a single line"; + + // Imports + imports_indent: IndentStyle, IndentStyle::Block, false, "Indent of imports"; + imports_layout: ListTactic, ListTactic::Mixed, false, "Item layout inside a import block"; + imports_granularity: ImportGranularity, ImportGranularity::Preserve, false, + "Merge or split imports to the provided granularity"; + group_imports: GroupImportsTactic, GroupImportsTactic::Preserve, false, + "Controls the strategy for how imports are grouped together"; + merge_imports: bool, false, false, "(deprecated: use imports_granularity instead)"; + + // Ordering + reorder_imports: bool, true, true, "Reorder import and extern crate statements alphabetically"; + reorder_modules: bool, true, true, "Reorder module statements alphabetically in group"; + reorder_impl_items: bool, false, false, "Reorder impl items"; + + // Spaces around punctuation + type_punctuation_density: TypeDensity, TypeDensity::Wide, false, + "Determines if '+' or '=' are wrapped in spaces in the punctuation of types"; + space_before_colon: bool, false, false, "Leave a space before the colon"; + space_after_colon: bool, true, false, "Leave a space after the colon"; + spaces_around_ranges: bool, false, false, "Put spaces around the .. and ..= range operators"; + binop_separator: SeparatorPlace, SeparatorPlace::Front, false, + "Where to put a binary operator when a binary expression goes multiline"; + + // Misc. + remove_nested_parens: bool, true, true, "Remove nested parens"; + combine_control_expr: bool, true, false, "Combine control expressions with function calls"; + short_array_element_width_threshold: usize, 10, true, + "Width threshold for an array element to be considered short"; + overflow_delimited_expr: bool, false, false, + "Allow trailing bracket/brace delimited expressions to overflow"; + struct_field_align_threshold: usize, 0, false, + "Align struct fields if their diffs fits within threshold"; + enum_discrim_align_threshold: usize, 0, false, + "Align enum variants discrims, if their diffs fit within threshold"; + match_arm_blocks: bool, true, false, "Wrap the body of arms in blocks when it does not fit on \ + the same line with the pattern of arms"; + match_arm_leading_pipes: MatchArmLeadingPipe, MatchArmLeadingPipe::Never, true, + "Determines whether leading pipes are emitted on match arms"; + force_multiline_blocks: bool, false, false, + "Force multiline closure bodies and match arms to be wrapped in a block"; + fn_args_layout: Density, Density::Tall, true, + "Control the layout of arguments in a function"; + brace_style: BraceStyle, BraceStyle::SameLineWhere, false, "Brace style for items"; + control_brace_style: ControlBraceStyle, ControlBraceStyle::AlwaysSameLine, false, + "Brace style for control flow constructs"; + trailing_semicolon: bool, true, false, + "Add trailing semicolon after break, continue and return"; + trailing_comma: SeparatorTactic, SeparatorTactic::Vertical, false, + "How to handle trailing commas for lists"; + match_block_trailing_comma: bool, false, true, + "Put a trailing comma after a block based match arm (non-block arms are not affected)"; + blank_lines_upper_bound: usize, 1, false, + "Maximum number of blank lines which can be put between items"; + blank_lines_lower_bound: usize, 0, false, + "Minimum number of blank lines which must be put between items"; + edition: Edition, Edition::Edition2015, true, "The edition of the parser (RFC 2052)"; + version: Version, Version::One, false, "Version of formatting rules"; + inline_attribute_width: usize, 0, false, + "Write an item and its attribute on the same line \ + if their combined width is below a threshold"; + format_generated_files: bool, true, false, "Format generated files"; + + // Options that can change the source code beyond whitespace/blocks (somewhat linty things) + merge_derives: bool, true, true, "Merge multiple `#[derive(...)]` into a single one"; + use_try_shorthand: bool, false, true, "Replace uses of the try! macro by the ? shorthand"; + use_field_init_shorthand: bool, false, true, "Use field initialization shorthand if possible"; + force_explicit_abi: bool, true, true, "Always print the abi for extern items"; + condense_wildcard_suffixes: bool, false, false, "Replace strings of _ wildcards by a single .. \ + in tuple patterns"; + + // Control options (changes the operation of rustfmt, rather than the formatting) + color: Color, Color::Auto, false, + "What Color option to use when none is supplied: Always, Never, Auto"; + required_version: String, env!("CARGO_PKG_VERSION").to_owned(), false, + "Require a specific version of rustfmt"; + unstable_features: bool, false, false, + "Enables unstable features. Only available on nightly channel"; + disable_all_formatting: bool, false, true, "Don't reformat anything"; + skip_children: bool, false, false, "Don't reformat out of line modules"; + hide_parse_errors: bool, false, false, "Hide errors from the parser"; + error_on_line_overflow: bool, false, false, "Error if unable to get all lines within max_width"; + error_on_unformatted: bool, false, false, + "Error if unable to get comments or string literals within max_width, \ + or they are left with trailing whitespaces"; + ignore: IgnoreList, IgnoreList::default(), false, + "Skip formatting the specified files and directories"; + + // Not user-facing + verbose: Verbosity, Verbosity::Normal, false, "How much to information to emit to the user"; + file_lines: FileLines, FileLines::all(), false, + "Lines to format; this is not supported in rustfmt.toml, and can only be specified \ + via the --file-lines option"; + emit_mode: EmitMode, EmitMode::Files, false, + "What emit Mode to use when none is supplied"; + make_backup: bool, false, false, "Backup changed files"; + print_misformatted_file_names: bool, false, true, + "Prints the names of mismatched files that were formatted. Prints the names of \ + files that would be formated when used with `--check` mode. "; +} + +#[derive(Error, Debug)] +#[error("Could not output config: {0}")] +pub struct ToTomlError(toml::ser::Error); + +impl PartialConfig { + pub fn to_toml(&self) -> Result<String, ToTomlError> { + // Non-user-facing options can't be specified in TOML + let mut cloned = self.clone(); + cloned.file_lines = None; + cloned.verbose = None; + cloned.width_heuristics = None; + cloned.print_misformatted_file_names = None; + cloned.merge_imports = None; + + ::toml::to_string(&cloned).map_err(ToTomlError) + } +} + +impl Config { + pub(crate) fn version_meets_requirement(&self) -> bool { + if self.was_set().required_version() { + let version = env!("CARGO_PKG_VERSION"); + let required_version = self.required_version(); + if version != required_version { + println!( + "Error: rustfmt version ({}) doesn't match the required version ({})", + version, required_version, + ); + return false; + } + } + + true + } + + /// Constructs a `Config` from the toml file specified at `file_path`. + /// + /// This method only looks at the provided path, for a method that + /// searches parents for a `rustfmt.toml` see `from_resolved_toml_path`. + /// + /// Returns a `Config` if the config could be read and parsed from + /// the file, otherwise errors. + pub(super) fn from_toml_path(file_path: &Path) -> Result<Config, Error> { + let mut file = File::open(&file_path)?; + let mut toml = String::new(); + file.read_to_string(&mut toml)?; + Config::from_toml(&toml, file_path.parent().unwrap()) + .map_err(|err| Error::new(ErrorKind::InvalidData, err)) + } + + /// Resolves the config for input in `dir`. + /// + /// Searches for `rustfmt.toml` beginning with `dir`, and + /// recursively checking parents of `dir` if no config file is found. + /// If no config file exists in `dir` or in any parent, a + /// default `Config` will be returned (and the returned path will be empty). + /// + /// Returns the `Config` to use, and the path of the project file if there was + /// one. + pub(super) fn from_resolved_toml_path(dir: &Path) -> Result<(Config, Option<PathBuf>), Error> { + /// Try to find a project file in the given directory and its parents. + /// Returns the path of a the nearest project file if one exists, + /// or `None` if no project file was found. + fn resolve_project_file(dir: &Path) -> Result<Option<PathBuf>, Error> { + let mut current = if dir.is_relative() { + env::current_dir()?.join(dir) + } else { + dir.to_path_buf() + }; + + current = fs::canonicalize(current)?; + + loop { + match get_toml_path(¤t) { + Ok(Some(path)) => return Ok(Some(path)), + Err(e) => return Err(e), + _ => (), + } + + // If the current directory has no parent, we're done searching. + if !current.pop() { + break; + } + } + + // If nothing was found, check in the home directory. + if let Some(home_dir) = dirs::home_dir() { + if let Some(path) = get_toml_path(&home_dir)? { + return Ok(Some(path)); + } + } + + // If none was found ther either, check in the user's configuration directory. + if let Some(mut config_dir) = dirs::config_dir() { + config_dir.push("rustfmt"); + if let Some(path) = get_toml_path(&config_dir)? { + return Ok(Some(path)); + } + } + + Ok(None) + } + + match resolve_project_file(dir)? { + None => Ok((Config::default(), None)), + Some(path) => Config::from_toml_path(&path).map(|config| (config, Some(path))), + } + } + + pub(crate) fn from_toml(toml: &str, dir: &Path) -> Result<Config, String> { + let parsed: ::toml::Value = toml + .parse() + .map_err(|e| format!("Could not parse TOML: {}", e))?; + let mut err = String::new(); + let table = parsed + .as_table() + .ok_or_else(|| String::from("Parsed config was not table"))?; + for key in table.keys() { + if !Config::is_valid_name(key) { + let msg = &format!("Warning: Unknown configuration option `{}`\n", key); + err.push_str(msg) + } + } + match parsed.try_into() { + Ok(parsed_config) => { + if !err.is_empty() { + eprint!("{}", err); + } + Ok(Config::default().fill_from_parsed_config(parsed_config, dir)) + } + Err(e) => { + err.push_str("Error: Decoding config file failed:\n"); + err.push_str(format!("{}\n", e).as_str()); + err.push_str("Please check your config file."); + Err(err) + } + } + } +} + +/// Loads a config by checking the client-supplied options and if appropriate, the +/// file system (including searching the file system for overrides). +pub fn load_config<O: CliOptions>( + file_path: Option<&Path>, + options: Option<O>, +) -> Result<(Config, Option<PathBuf>), Error> { + let over_ride = match options { + Some(ref opts) => config_path(opts)?, + None => None, + }; + + let result = if let Some(over_ride) = over_ride { + Config::from_toml_path(over_ride.as_ref()).map(|p| (p, Some(over_ride.to_owned()))) + } else if let Some(file_path) = file_path { + Config::from_resolved_toml_path(file_path) + } else { + Ok((Config::default(), None)) + }; + + result.map(|(mut c, p)| { + if let Some(options) = options { + options.apply_to(&mut c); + } + (c, p) + }) +} + +// Check for the presence of known config file names (`rustfmt.toml, `.rustfmt.toml`) in `dir` +// +// Return the path if a config file exists, empty if no file exists, and Error for IO errors +fn get_toml_path(dir: &Path) -> Result<Option<PathBuf>, Error> { + const CONFIG_FILE_NAMES: [&str; 2] = [".rustfmt.toml", "rustfmt.toml"]; + for config_file_name in &CONFIG_FILE_NAMES { + let config_file = dir.join(config_file_name); + match fs::metadata(&config_file) { + // Only return if it's a file to handle the unlikely situation of a directory named + // `rustfmt.toml`. + Ok(ref md) if md.is_file() => return Ok(Some(config_file)), + // Return the error if it's something other than `NotFound`; otherwise we didn't + // find the project file yet, and continue searching. + Err(e) => { + if e.kind() != ErrorKind::NotFound { + let ctx = format!("Failed to get metadata for config file {:?}", &config_file); + let err = anyhow::Error::new(e).context(ctx); + return Err(Error::new(ErrorKind::Other, err)); + } + } + _ => {} + } + } + Ok(None) +} + +fn config_path(options: &dyn CliOptions) -> Result<Option<PathBuf>, Error> { + let config_path_not_found = |path: &str| -> Result<Option<PathBuf>, Error> { + Err(Error::new( + ErrorKind::NotFound, + format!( + "Error: unable to find a config file for the given path: `{}`", + path + ), + )) + }; + + // Read the config_path and convert to parent dir if a file is provided. + // If a config file cannot be found from the given path, return error. + match options.config_path() { + Some(path) if !path.exists() => config_path_not_found(path.to_str().unwrap()), + Some(path) if path.is_dir() => { + let config_file_path = get_toml_path(path)?; + if config_file_path.is_some() { + Ok(config_file_path) + } else { + config_path_not_found(path.to_str().unwrap()) + } + } + path => Ok(path.map(ToOwned::to_owned)), + } +} + +#[cfg(test)] +mod test { + use super::*; + use std::str; + + use rustfmt_config_proc_macro::{nightly_only_test, stable_only_test}; + + #[allow(dead_code)] + mod mock { + use super::super::*; + + create_config! { + // Options that are used by the generated functions + max_width: usize, 100, true, "Maximum width of each line"; + required_version: String, env!("CARGO_PKG_VERSION").to_owned(), false, + "Require a specific version of rustfmt."; + ignore: IgnoreList, IgnoreList::default(), false, + "Skip formatting the specified files and directories."; + verbose: Verbosity, Verbosity::Normal, false, + "How much to information to emit to the user"; + file_lines: FileLines, FileLines::all(), false, + "Lines to format; this is not supported in rustfmt.toml, and can only be specified \ + via the --file-lines option"; + + // merge_imports deprecation + imports_granularity: ImportGranularity, ImportGranularity::Preserve, false, + "Merge imports"; + merge_imports: bool, false, false, "(deprecated: use imports_granularity instead)"; + + // Width Heuristics + use_small_heuristics: Heuristics, Heuristics::Default, true, + "Whether to use different formatting for items and \ + expressions if they satisfy a heuristic notion of 'small'."; + width_heuristics: WidthHeuristics, WidthHeuristics::scaled(100), false, + "'small' heuristic values"; + + fn_call_width: usize, 60, true, "Maximum width of the args of a function call before \ + falling back to vertical formatting."; + attr_fn_like_width: usize, 70, true, "Maximum width of the args of a function-like \ + attributes before falling back to vertical formatting."; + struct_lit_width: usize, 18, true, "Maximum width in the body of a struct lit before \ + falling back to vertical formatting."; + struct_variant_width: usize, 35, true, "Maximum width in the body of a struct \ + variant before falling back to vertical formatting."; + array_width: usize, 60, true, "Maximum width of an array literal before falling \ + back to vertical formatting."; + chain_width: usize, 60, true, "Maximum length of a chain to fit on a single line."; + single_line_if_else_max_width: usize, 50, true, "Maximum line length for single \ + line if-else expressions. A value of zero means always break if-else expressions."; + + // Options that are used by the tests + stable_option: bool, false, true, "A stable option"; + unstable_option: bool, false, false, "An unstable option"; + } + } + + #[test] + fn test_config_set() { + let mut config = Config::default(); + config.set().verbose(Verbosity::Quiet); + assert_eq!(config.verbose(), Verbosity::Quiet); + config.set().verbose(Verbosity::Normal); + assert_eq!(config.verbose(), Verbosity::Normal); + } + + #[test] + fn test_config_used_to_toml() { + let config = Config::default(); + + let merge_derives = config.merge_derives(); + let skip_children = config.skip_children(); + + let used_options = config.used_options(); + let toml = used_options.to_toml().unwrap(); + assert_eq!( + toml, + format!( + "merge_derives = {}\nskip_children = {}\n", + merge_derives, skip_children, + ) + ); + } + + #[test] + fn test_was_set() { + let config = Config::from_toml("hard_tabs = true", Path::new("")).unwrap(); + + assert_eq!(config.was_set().hard_tabs(), true); + assert_eq!(config.was_set().verbose(), false); + } + + #[test] + fn test_print_docs_exclude_unstable() { + use self::mock::Config; + + let mut output = Vec::new(); + Config::print_docs(&mut output, false); + + let s = str::from_utf8(&output).unwrap(); + + assert_eq!(s.contains("stable_option"), true); + assert_eq!(s.contains("unstable_option"), false); + assert_eq!(s.contains("(unstable)"), false); + } + + #[test] + fn test_print_docs_include_unstable() { + use self::mock::Config; + + let mut output = Vec::new(); + Config::print_docs(&mut output, true); + + let s = str::from_utf8(&output).unwrap(); + assert_eq!(s.contains("stable_option"), true); + assert_eq!(s.contains("unstable_option"), true); + assert_eq!(s.contains("(unstable)"), true); + } + + #[test] + fn test_dump_default_config() { + let default_config = format!( + r#"max_width = 100 +hard_tabs = false +tab_spaces = 4 +newline_style = "Auto" +indent_style = "Block" +use_small_heuristics = "Default" +fn_call_width = 60 +attr_fn_like_width = 70 +struct_lit_width = 18 +struct_variant_width = 35 +array_width = 60 +chain_width = 60 +single_line_if_else_max_width = 50 +wrap_comments = false +format_code_in_doc_comments = false +doc_comment_code_block_width = 100 +comment_width = 80 +normalize_comments = false +normalize_doc_attributes = false +format_strings = false +format_macro_matchers = false +format_macro_bodies = true +hex_literal_case = "Preserve" +empty_item_single_line = true +struct_lit_single_line = true +fn_single_line = false +where_single_line = false +imports_indent = "Block" +imports_layout = "Mixed" +imports_granularity = "Preserve" +group_imports = "Preserve" +reorder_imports = true +reorder_modules = true +reorder_impl_items = false +type_punctuation_density = "Wide" +space_before_colon = false +space_after_colon = true +spaces_around_ranges = false +binop_separator = "Front" +remove_nested_parens = true +combine_control_expr = true +short_array_element_width_threshold = 10 +overflow_delimited_expr = false +struct_field_align_threshold = 0 +enum_discrim_align_threshold = 0 +match_arm_blocks = true +match_arm_leading_pipes = "Never" +force_multiline_blocks = false +fn_args_layout = "Tall" +brace_style = "SameLineWhere" +control_brace_style = "AlwaysSameLine" +trailing_semicolon = true +trailing_comma = "Vertical" +match_block_trailing_comma = false +blank_lines_upper_bound = 1 +blank_lines_lower_bound = 0 +edition = "2015" +version = "One" +inline_attribute_width = 0 +format_generated_files = true +merge_derives = true +use_try_shorthand = false +use_field_init_shorthand = false +force_explicit_abi = true +condense_wildcard_suffixes = false +color = "Auto" +required_version = "{}" +unstable_features = false +disable_all_formatting = false +skip_children = false +hide_parse_errors = false +error_on_line_overflow = false +error_on_unformatted = false +ignore = [] +emit_mode = "Files" +make_backup = false +"#, + env!("CARGO_PKG_VERSION") + ); + let toml = Config::default().all_options().to_toml().unwrap(); + assert_eq!(&toml, &default_config); + } + + #[stable_only_test] + #[test] + fn test_as_not_nightly_channel() { + let mut config = Config::default(); + assert_eq!(config.was_set().unstable_features(), false); + config.set().unstable_features(true); + assert_eq!(config.was_set().unstable_features(), false); + } + + #[nightly_only_test] + #[test] + fn test_as_nightly_channel() { + let mut config = Config::default(); + config.set().unstable_features(true); + // When we don't set the config from toml or command line options it + // doesn't get marked as set by the user. + assert_eq!(config.was_set().unstable_features(), false); + config.set().unstable_features(true); + assert_eq!(config.unstable_features(), true); + } + + #[nightly_only_test] + #[test] + fn test_unstable_from_toml() { + let config = Config::from_toml("unstable_features = true", Path::new("")).unwrap(); + assert_eq!(config.was_set().unstable_features(), true); + assert_eq!(config.unstable_features(), true); + } + + #[cfg(test)] + mod deprecated_option_merge_imports { + use super::*; + + #[nightly_only_test] + #[test] + fn test_old_option_set() { + let toml = r#" + unstable_features = true + merge_imports = true + "#; + let config = Config::from_toml(toml, Path::new("")).unwrap(); + assert_eq!(config.imports_granularity(), ImportGranularity::Crate); + } + + #[nightly_only_test] + #[test] + fn test_both_set() { + let toml = r#" + unstable_features = true + merge_imports = true + imports_granularity = "Preserve" + "#; + let config = Config::from_toml(toml, Path::new("")).unwrap(); + assert_eq!(config.imports_granularity(), ImportGranularity::Preserve); + } + + #[nightly_only_test] + #[test] + fn test_new_overridden() { + let toml = r#" + unstable_features = true + merge_imports = true + "#; + let mut config = Config::from_toml(toml, Path::new("")).unwrap(); + config.override_value("imports_granularity", "Preserve"); + assert_eq!(config.imports_granularity(), ImportGranularity::Preserve); + } + + #[nightly_only_test] + #[test] + fn test_old_overridden() { + let toml = r#" + unstable_features = true + imports_granularity = "Module" + "#; + let mut config = Config::from_toml(toml, Path::new("")).unwrap(); + config.override_value("merge_imports", "true"); + // no effect: the new option always takes precedence + assert_eq!(config.imports_granularity(), ImportGranularity::Module); + } + } + + #[cfg(test)] + mod use_small_heuristics { + use super::*; + + #[test] + fn test_default_sets_correct_widths() { + let toml = r#" + use_small_heuristics = "Default" + max_width = 200 + "#; + let config = Config::from_toml(toml, Path::new("")).unwrap(); + assert_eq!(config.array_width(), 120); + assert_eq!(config.attr_fn_like_width(), 140); + assert_eq!(config.chain_width(), 120); + assert_eq!(config.fn_call_width(), 120); + assert_eq!(config.single_line_if_else_max_width(), 100); + assert_eq!(config.struct_lit_width(), 36); + assert_eq!(config.struct_variant_width(), 70); + } + + #[test] + fn test_max_sets_correct_widths() { + let toml = r#" + use_small_heuristics = "Max" + max_width = 120 + "#; + let config = Config::from_toml(toml, Path::new("")).unwrap(); + assert_eq!(config.array_width(), 120); + assert_eq!(config.attr_fn_like_width(), 120); + assert_eq!(config.chain_width(), 120); + assert_eq!(config.fn_call_width(), 120); + assert_eq!(config.single_line_if_else_max_width(), 120); + assert_eq!(config.struct_lit_width(), 120); + assert_eq!(config.struct_variant_width(), 120); + } + + #[test] + fn test_off_sets_correct_widths() { + let toml = r#" + use_small_heuristics = "Off" + max_width = 100 + "#; + let config = Config::from_toml(toml, Path::new("")).unwrap(); + assert_eq!(config.array_width(), usize::max_value()); + assert_eq!(config.attr_fn_like_width(), usize::max_value()); + assert_eq!(config.chain_width(), usize::max_value()); + assert_eq!(config.fn_call_width(), usize::max_value()); + assert_eq!(config.single_line_if_else_max_width(), 0); + assert_eq!(config.struct_lit_width(), 0); + assert_eq!(config.struct_variant_width(), 0); + } + + #[test] + fn test_override_works_with_default() { + let toml = r#" + use_small_heuristics = "Default" + array_width = 20 + attr_fn_like_width = 40 + chain_width = 20 + fn_call_width = 90 + single_line_if_else_max_width = 40 + struct_lit_width = 30 + struct_variant_width = 34 + "#; + let config = Config::from_toml(toml, Path::new("")).unwrap(); + assert_eq!(config.array_width(), 20); + assert_eq!(config.attr_fn_like_width(), 40); + assert_eq!(config.chain_width(), 20); + assert_eq!(config.fn_call_width(), 90); + assert_eq!(config.single_line_if_else_max_width(), 40); + assert_eq!(config.struct_lit_width(), 30); + assert_eq!(config.struct_variant_width(), 34); + } + + #[test] + fn test_override_with_max() { + let toml = r#" + use_small_heuristics = "Max" + array_width = 20 + attr_fn_like_width = 40 + chain_width = 20 + fn_call_width = 90 + single_line_if_else_max_width = 40 + struct_lit_width = 30 + struct_variant_width = 34 + "#; + let config = Config::from_toml(toml, Path::new("")).unwrap(); + assert_eq!(config.array_width(), 20); + assert_eq!(config.attr_fn_like_width(), 40); + assert_eq!(config.chain_width(), 20); + assert_eq!(config.fn_call_width(), 90); + assert_eq!(config.single_line_if_else_max_width(), 40); + assert_eq!(config.struct_lit_width(), 30); + assert_eq!(config.struct_variant_width(), 34); + } + + #[test] + fn test_override_with_off() { + let toml = r#" + use_small_heuristics = "Off" + array_width = 20 + attr_fn_like_width = 40 + chain_width = 20 + fn_call_width = 90 + single_line_if_else_max_width = 40 + struct_lit_width = 30 + struct_variant_width = 34 + "#; + let config = Config::from_toml(toml, Path::new("")).unwrap(); + assert_eq!(config.array_width(), 20); + assert_eq!(config.attr_fn_like_width(), 40); + assert_eq!(config.chain_width(), 20); + assert_eq!(config.fn_call_width(), 90); + assert_eq!(config.single_line_if_else_max_width(), 40); + assert_eq!(config.struct_lit_width(), 30); + assert_eq!(config.struct_variant_width(), 34); + } + + #[test] + fn test_fn_call_width_config_exceeds_max_width() { + let toml = r#" + max_width = 90 + fn_call_width = 95 + "#; + let config = Config::from_toml(toml, Path::new("")).unwrap(); + assert_eq!(config.fn_call_width(), 90); + } + + #[test] + fn test_attr_fn_like_width_config_exceeds_max_width() { + let toml = r#" + max_width = 80 + attr_fn_like_width = 90 + "#; + let config = Config::from_toml(toml, Path::new("")).unwrap(); + assert_eq!(config.attr_fn_like_width(), 80); + } + + #[test] + fn test_struct_lit_config_exceeds_max_width() { + let toml = r#" + max_width = 78 + struct_lit_width = 90 + "#; + let config = Config::from_toml(toml, Path::new("")).unwrap(); + assert_eq!(config.struct_lit_width(), 78); + } + + #[test] + fn test_struct_variant_width_config_exceeds_max_width() { + let toml = r#" + max_width = 80 + struct_variant_width = 90 + "#; + let config = Config::from_toml(toml, Path::new("")).unwrap(); + assert_eq!(config.struct_variant_width(), 80); + } + + #[test] + fn test_array_width_config_exceeds_max_width() { + let toml = r#" + max_width = 60 + array_width = 80 + "#; + let config = Config::from_toml(toml, Path::new("")).unwrap(); + assert_eq!(config.array_width(), 60); + } + + #[test] + fn test_chain_width_config_exceeds_max_width() { + let toml = r#" + max_width = 80 + chain_width = 90 + "#; + let config = Config::from_toml(toml, Path::new("")).unwrap(); + assert_eq!(config.chain_width(), 80); + } + + #[test] + fn test_single_line_if_else_max_width_config_exceeds_max_width() { + let toml = r#" + max_width = 70 + single_line_if_else_max_width = 90 + "#; + let config = Config::from_toml(toml, Path::new("")).unwrap(); + assert_eq!(config.single_line_if_else_max_width(), 70); + } + + #[test] + fn test_override_fn_call_width_exceeds_max_width() { + let mut config = Config::default(); + config.override_value("fn_call_width", "101"); + assert_eq!(config.fn_call_width(), 100); + } + + #[test] + fn test_override_attr_fn_like_width_exceeds_max_width() { + let mut config = Config::default(); + config.override_value("attr_fn_like_width", "101"); + assert_eq!(config.attr_fn_like_width(), 100); + } + + #[test] + fn test_override_struct_lit_exceeds_max_width() { + let mut config = Config::default(); + config.override_value("struct_lit_width", "101"); + assert_eq!(config.struct_lit_width(), 100); + } + + #[test] + fn test_override_struct_variant_width_exceeds_max_width() { + let mut config = Config::default(); + config.override_value("struct_variant_width", "101"); + assert_eq!(config.struct_variant_width(), 100); + } + + #[test] + fn test_override_array_width_exceeds_max_width() { + let mut config = Config::default(); + config.override_value("array_width", "101"); + assert_eq!(config.array_width(), 100); + } + + #[test] + fn test_override_chain_width_exceeds_max_width() { + let mut config = Config::default(); + config.override_value("chain_width", "101"); + assert_eq!(config.chain_width(), 100); + } + + #[test] + fn test_override_single_line_if_else_max_width_exceeds_max_width() { + let mut config = Config::default(); + config.override_value("single_line_if_else_max_width", "101"); + assert_eq!(config.single_line_if_else_max_width(), 100); + } + } +} |