src/librustdoc/test.rs

   1 // Copyright 2013-2014 The Rust Project Developers. See the COPYRIGHT
   2 // file at the top-level directory of this distribution and at
   3 // http://rust-lang.org/COPYRIGHT.
   4 //
   5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
   6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
   7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
   8 // option. This file may not be copied, modified, or distributed
   9 // except according to those terms.
  10
  11 use std::collections::HashMap;
  12 use std::env;
  13 use std::ffi::OsString;
  14 use std::io::prelude::*;
  15 use std::io;
  16 use std::path::{Path, PathBuf};
  17 use std::panic::{self, AssertUnwindSafe};
  18 use std::process::Command;
  19 use std::rc::Rc;
  20 use std::str;
  21 use std::sync::{Arc, Mutex};
  22
  23 use testing;
  24 use rustc_lint;
  25 use rustc::dep_graph::DepGraph;
  26 use rustc::hir;
  27 use rustc::hir::intravisit;
  28 use rustc::session::{self, config};
  29 use rustc::session::config::{OutputType, OutputTypes, Externs};
  30 use rustc::session::search_paths::{SearchPaths, PathKind};
  31 use rustc_back::dynamic_lib::DynamicLibrary;
  32 use rustc_back::tempdir::TempDir;
  33 use rustc_driver::{self, driver, Compilation};
  34 use rustc_driver::driver::phase_2_configure_and_expand;
  35 use rustc_metadata::cstore::CStore;
  36 use rustc_resolve::MakeGlobMap;
  37 use rustc_trans;
  38 use rustc_trans::back::link;
  39 use syntax::ast;
  40 use syntax::codemap::CodeMap;
  41 use syntax::feature_gate::UnstableFeatures;
  42 use syntax_pos::{BytePos, DUMMY_SP, Pos, Span};
  43 use errors;
  44 use errors::emitter::ColorConfig;
  45
  46 use clean::Attributes;
  47 use html::markdown::{self, RenderType};
  48
  49 #[derive(Clone, Default)]
  50 pub struct TestOptions {
  51     pub no_crate_inject: bool,
  52     pub attrs: Vec<String>,
  53 }
  54
  55 pub fn run(input: &str,
  56            cfgs: Vec<String>,
  57            libs: SearchPaths,
  58            externs: Externs,
  59            mut test_args: Vec<String>,
  60            crate_name: Option<String>,
  61            maybe_sysroot: Option<PathBuf>,
  62            render_type: RenderType,
  63            display_warnings: bool)
  64            -> isize {
  65     let input_path = PathBuf::from(input);
  66     let input = config::Input::File(input_path.clone());
  67
  68     let sessopts = config::Options {
  69         maybe_sysroot: maybe_sysroot.clone().or_else(
  70             || Some(env::current_exe().unwrap().parent().unwrap().parent().unwrap().to_path_buf())),
  71         search_paths: libs.clone(),
  72         crate_types: vec![config::CrateTypeDylib],
  73         externs: externs.clone(),
  74         unstable_features: UnstableFeatures::from_environment(),
  75         actually_rustdoc: true,
  76         ..config::basic_options().clone()
  77     };
  78
  79     let codemap = Rc::new(CodeMap::new(sessopts.file_path_mapping()));
  80     let handler =
  81         errors::Handler::with_tty_emitter(ColorConfig::Auto, true, false, Some(codemap.clone()));
  82
  83     let dep_graph = DepGraph::new(false);
  84     let _ignore = dep_graph.in_ignore();
  85     let cstore = Rc::new(CStore::new(&dep_graph, box rustc_trans::LlvmMetadataLoader));
  86     let mut sess = session::build_session_(
  87         sessopts, &dep_graph, Some(input_path.clone()), handler, codemap.clone(), cstore.clone(),
  88     );
  89     rustc_trans::init(&sess);
  90     rustc_lint::register_builtins(&mut sess.lint_store.borrow_mut(), Some(&sess));
  91     sess.parse_sess.config =
  92         config::build_configuration(&sess, config::parse_cfgspecs(cfgs.clone()));
  93
  94     let krate = panictry!(driver::phase_1_parse_input(&sess, &input));
  95     let driver::ExpansionResult { defs, mut hir_forest, .. } = {
  96         phase_2_configure_and_expand(
  97             &sess, &cstore, krate, None, "rustdoc-test", None, MakeGlobMap::No, |_| Ok(())
  98         ).expect("phase_2_configure_and_expand aborted in rustdoc!")
  99     };
 100
 101     let crate_name = crate_name.unwrap_or_else(|| {
 102         link::find_crate_name(None, &hir_forest.krate().attrs, &input)
 103     });
 104     let opts = scrape_test_config(hir_forest.krate());
 105     let mut collector = Collector::new(crate_name,
 106                                        cfgs,
 107                                        libs,
 108                                        externs,
 109                                        false,
 110                                        opts,
 111                                        maybe_sysroot,
 112                                        Some(codemap),
 113                                        None,
 114                                        render_type);
 115
 116     {
 117         let dep_graph = DepGraph::new(false);
 118         let _ignore = dep_graph.in_ignore();
 119         let map = hir::map::map_crate(&mut hir_forest, defs);
 120         let krate = map.krate();
 121         let mut hir_collector = HirCollector {
 122             collector: &mut collector,
 123             map: &map
 124         };
 125         hir_collector.visit_testable("".to_string(), &krate.attrs, |this| {
 126             intravisit::walk_crate(this, krate);
 127         });
 128     }
 129
 130     test_args.insert(0, "rustdoctest".to_string());
 131
 132     testing::test_main(&test_args,
 133                        collector.tests.into_iter().collect(),
 134                        testing::Options::new().display_output(display_warnings));
 135     0
 136 }
 137
 138 // Look for #![doc(test(no_crate_inject))], used by crates in the std facade
 139 fn scrape_test_config(krate: &::rustc::hir::Crate) -> TestOptions {
 140     use syntax::print::pprust;
 141
 142     let mut opts = TestOptions {
 143         no_crate_inject: false,
 144         attrs: Vec::new(),
 145     };
 146
 147     let test_attrs: Vec<_> = krate.attrs.iter()
 148         .filter(|a| a.check_name("doc"))
 149         .flat_map(|a| a.meta_item_list().unwrap_or_else(Vec::new))
 150         .filter(|a| a.check_name("test"))
 151         .collect();
 152     let attrs = test_attrs.iter().flat_map(|a| a.meta_item_list().unwrap_or(&[]));
 153
 154     for attr in attrs {
 155         if attr.check_name("no_crate_inject") {
 156             opts.no_crate_inject = true;
 157         }
 158         if attr.check_name("attr") {
 159             if let Some(l) = attr.meta_item_list() {
 160                 for item in l {
 161                     opts.attrs.push(pprust::meta_list_item_to_string(item));
 162                 }
 163             }
 164         }
 165     }
 166
 167     opts
 168 }
 169
 170 fn runtest(test: &str, cratename: &str, cfgs: Vec<String>, libs: SearchPaths,
 171            externs: Externs,
 172            should_panic: bool, no_run: bool, as_test_harness: bool,
 173            compile_fail: bool, mut error_codes: Vec<String>, opts: &TestOptions,
 174            maybe_sysroot: Option<PathBuf>) {
 175     // the test harness wants its own `main` & top level functions, so
 176     // never wrap the test in `fn main() { ... }`
 177     let test = maketest(test, Some(cratename), as_test_harness, opts);
 178     let input = config::Input::Str {
 179         name: driver::anon_src(),
 180         input: test.to_owned(),
 181     };
 182     let outputs = OutputTypes::new(&[(OutputType::Exe, None)]);
 183
 184     let sessopts = config::Options {
 185         maybe_sysroot: maybe_sysroot.or_else(
 186             || Some(env::current_exe().unwrap().parent().unwrap().parent().unwrap().to_path_buf())),
 187         search_paths: libs,
 188         crate_types: vec![config::CrateTypeExecutable],
 189         output_types: outputs,
 190         externs: externs,
 191         cg: config::CodegenOptions {
 192             prefer_dynamic: true,
 193             .. config::basic_codegen_options()
 194         },
 195         test: as_test_harness,
 196         unstable_features: UnstableFeatures::from_environment(),
 197         ..config::basic_options().clone()
 198     };
 199
 200     // Shuffle around a few input and output handles here. We're going to pass
 201     // an explicit handle into rustc to collect output messages, but we also
 202     // want to catch the error message that rustc prints when it fails.
 203     //
 204     // We take our thread-local stderr (likely set by the test runner) and replace
 205     // it with a sink that is also passed to rustc itself. When this function
 206     // returns the output of the sink is copied onto the output of our own thread.
 207     //
 208     // The basic idea is to not use a default Handler for rustc, and then also
 209     // not print things by default to the actual stderr.
 210     struct Sink(Arc<Mutex<Vec<u8>>>);
 211     impl Write for Sink {
 212         fn write(&mut self, data: &[u8]) -> io::Result<usize> {
 213             Write::write(&mut *self.0.lock().unwrap(), data)
 214         }
 215         fn flush(&mut self) -> io::Result<()> { Ok(()) }
 216     }
 217     struct Bomb(Arc<Mutex<Vec<u8>>>, Box<Write+Send>);
 218     impl Drop for Bomb {
 219         fn drop(&mut self) {
 220             let _ = self.1.write_all(&self.0.lock().unwrap());
 221         }
 222     }
 223     let data = Arc::new(Mutex::new(Vec::new()));
 224     let codemap = Rc::new(CodeMap::new(sessopts.file_path_mapping()));
 225     let emitter = errors::emitter::EmitterWriter::new(box Sink(data.clone()),
 226                                                       Some(codemap.clone()));
 227     let old = io::set_panic(Some(box Sink(data.clone())));
 228     let _bomb = Bomb(data.clone(), old.unwrap_or(box io::stdout()));
 229
 230     // Compile the code
 231     let diagnostic_handler = errors::Handler::with_emitter(true, false, box emitter);
 232
 233     let dep_graph = DepGraph::new(false);
 234     let cstore = Rc::new(CStore::new(&dep_graph, box rustc_trans::LlvmMetadataLoader));
 235     let mut sess = session::build_session_(
 236         sessopts, &dep_graph, None, diagnostic_handler, codemap, cstore.clone(),
 237     );
 238     rustc_trans::init(&sess);
 239     rustc_lint::register_builtins(&mut sess.lint_store.borrow_mut(), Some(&sess));
 240
 241     let outdir = Mutex::new(TempDir::new("rustdoctest").ok().expect("rustdoc needs a tempdir"));
 242     let libdir = sess.target_filesearch(PathKind::All).get_lib_path();
 243     let mut control = driver::CompileController::basic();
 244     sess.parse_sess.config =
 245         config::build_configuration(&sess, config::parse_cfgspecs(cfgs.clone()));
 246     let out = Some(outdir.lock().unwrap().path().to_path_buf());
 247
 248     if no_run {
 249         control.after_analysis.stop = Compilation::Stop;
 250     }
 251
 252     let res = panic::catch_unwind(AssertUnwindSafe(|| {
 253         driver::compile_input(&sess, &cstore, &input, &out, &None, None, &control)
 254     }));
 255
 256     match res {
 257         Ok(r) => {
 258             match r {
 259                 Err(count) => {
 260                     if count > 0 && !compile_fail {
 261                         sess.fatal("aborting due to previous error(s)")
 262                     } else if count == 0 && compile_fail {
 263                         panic!("test compiled while it wasn't supposed to")
 264                     }
 265                     if count > 0 && error_codes.len() > 0 {
 266                         let out = String::from_utf8(data.lock().unwrap().to_vec()).unwrap();
 267                         error_codes.retain(|err| !out.contains(err));
 268                     }
 269                 }
 270                 Ok(()) if compile_fail => {
 271                     panic!("test compiled while it wasn't supposed to")
 272                 }
 273                 _ => {}
 274             }
 275         }
 276         Err(_) => {
 277             if !compile_fail {
 278                 panic!("couldn't compile the test");
 279             }
 280             if error_codes.len() > 0 {
 281                 let out = String::from_utf8(data.lock().unwrap().to_vec()).unwrap();
 282                 error_codes.retain(|err| !out.contains(err));
 283             }
 284         }
 285     }
 286
 287     if error_codes.len() > 0 {
 288         panic!("Some expected error codes were not found: {:?}", error_codes);
 289     }
 290
 291     if no_run { return }
 292
 293     // Run the code!
 294     //
 295     // We're careful to prepend the *target* dylib search path to the child's
 296     // environment to ensure that the target loads the right libraries at
 297     // runtime. It would be a sad day if the *host* libraries were loaded as a
 298     // mistake.
 299     let mut cmd = Command::new(&outdir.lock().unwrap().path().join("rust_out"));
 300     let var = DynamicLibrary::envvar();
 301     let newpath = {
 302         let path = env::var_os(var).unwrap_or(OsString::new());
 303         let mut path = env::split_paths(&path).collect::<Vec<_>>();
 304         path.insert(0, libdir.clone());
 305         env::join_paths(path).unwrap()
 306     };
 307     cmd.env(var, &newpath);
 308
 309     match cmd.output() {
 310         Err(e) => panic!("couldn't run the test: {}{}", e,
 311                         if e.kind() == io::ErrorKind::PermissionDenied {
 312                             " - maybe your tempdir is mounted with noexec?"
 313                         } else { "" }),
 314         Ok(out) => {
 315             if should_panic && out.status.success() {
 316                 panic!("test executable succeeded when it should have failed");
 317             } else if !should_panic && !out.status.success() {
 318                 panic!("test executable failed:\n{}\n{}\n",
 319                        str::from_utf8(&out.stdout).unwrap_or(""),
 320                        str::from_utf8(&out.stderr).unwrap_or(""));
 321             }
 322         }
 323     }
 324 }
 325
 326 pub fn maketest(s: &str, cratename: Option<&str>, dont_insert_main: bool,
 327                 opts: &TestOptions) -> String {
 328     let (crate_attrs, everything_else) = partition_source(s);
 329
 330     let mut prog = String::new();
 331
 332     // First push any outer attributes from the example, assuming they
 333     // are intended to be crate attributes.
 334     prog.push_str(&crate_attrs);
 335
 336     // Next, any attributes for other aspects such as lints.
 337     for attr in &opts.attrs {
 338         prog.push_str(&format!("#![{}]\n", attr));
 339     }
 340
 341     // Don't inject `extern crate std` because it's already injected by the
 342     // compiler.
 343     if !s.contains("extern crate") && !opts.no_crate_inject && cratename != Some("std") {
 344         if let Some(cratename) = cratename {
 345             if s.contains(cratename) {
 346                 prog.push_str(&format!("extern crate {};\n", cratename));
 347             }
 348         }
 349     }
 350     if dont_insert_main || s.contains("fn main") {
 351         prog.push_str(&everything_else);
 352     } else {
 353         prog.push_str("fn main() {\n");
 354         prog.push_str(&everything_else);
 355         prog = prog.trim().into();
 356         prog.push_str("\n}");
 357     }
 358
 359     info!("final test program: {}", prog);
 360
 361     prog
 362 }
 363
 364 // FIXME(aburka): use a real parser to deal with multiline attributes
 365 fn partition_source(s: &str) -> (String, String) {
 366     use std_unicode::str::UnicodeStr;
 367
 368     let mut after_header = false;
 369     let mut before = String::new();
 370     let mut after = String::new();
 371
 372     for line in s.lines() {
 373         let trimline = line.trim();
 374         let header = trimline.is_whitespace() ||
 375             trimline.starts_with("#![");
 376         if !header || after_header {
 377             after_header = true;
 378             after.push_str(line);
 379             after.push_str("\n");
 380         } else {
 381             before.push_str(line);
 382             before.push_str("\n");
 383         }
 384     }
 385
 386     (before, after)
 387 }
 388
 389 pub struct Collector {
 390     pub tests: Vec<testing::TestDescAndFn>,
 391     // to be removed when hoedown will be definitely gone
 392     pub old_tests: HashMap<String, Vec<String>>,
 393     names: Vec<String>,
 394     cfgs: Vec<String>,
 395     libs: SearchPaths,
 396     externs: Externs,
 397     cnt: usize,
 398     use_headers: bool,
 399     current_header: Option<String>,
 400     cratename: String,
 401     opts: TestOptions,
 402     maybe_sysroot: Option<PathBuf>,
 403     position: Span,
 404     codemap: Option<Rc<CodeMap>>,
 405     filename: Option<String>,
 406     // to be removed when hoedown will be removed as well
 407     pub render_type: RenderType,
 408 }
 409
 410 impl Collector {
 411     pub fn new(cratename: String, cfgs: Vec<String>, libs: SearchPaths, externs: Externs,
 412                use_headers: bool, opts: TestOptions, maybe_sysroot: Option<PathBuf>,
 413                codemap: Option<Rc<CodeMap>>, filename: Option<String>,
 414                render_type: RenderType) -> Collector {
 415         Collector {
 416             tests: Vec::new(),
 417             old_tests: HashMap::new(),
 418             names: Vec::new(),
 419             cfgs: cfgs,
 420             libs: libs,
 421             externs: externs,
 422             cnt: 0,
 423             use_headers: use_headers,
 424             current_header: None,
 425             cratename: cratename,
 426             opts: opts,
 427             maybe_sysroot: maybe_sysroot,
 428             position: DUMMY_SP,
 429             codemap: codemap,
 430             filename: filename,
 431             render_type: render_type,
 432         }
 433     }
 434
 435     fn generate_name(&self, line: usize, filename: &str) -> String {
 436         if self.use_headers {
 437             if let Some(ref header) = self.current_header {
 438                 format!("{} - {} (line {})", filename, header, line)
 439             } else {
 440                 format!("{} - (line {})", filename, line)
 441             }
 442         } else {
 443             format!("{} - {} (line {})", filename, self.names.join("::"), line)
 444         }
 445     }
 446
 447     // to be removed once hoedown is gone
 448     fn generate_name_beginning(&self, filename: &str) -> String {
 449         if self.use_headers {
 450             if let Some(ref header) = self.current_header {
 451                 format!("{} - {} (line", filename, header)
 452             } else {
 453                 format!("{} - (line", filename)
 454             }
 455         } else {
 456             format!("{} - {} (line", filename, self.names.join("::"))
 457         }
 458     }
 459
 460     pub fn add_old_test(&mut self, test: String, filename: String) {
 461         let name_beg = self.generate_name_beginning(&filename);
 462         let entry = self.old_tests.entry(name_beg)
 463                                   .or_insert(Vec::new());
 464         entry.push(test.trim().to_owned());
 465     }
 466
 467     pub fn add_test(&mut self, test: String,
 468                     should_panic: bool, no_run: bool, should_ignore: bool,
 469                     as_test_harness: bool, compile_fail: bool, error_codes: Vec<String>,
 470                     line: usize, filename: String) {
 471         let name = self.generate_name(line, &filename);
 472         // to be removed when hoedown is removed
 473         if self.render_type == RenderType::Pulldown {
 474             let name_beg = self.generate_name_beginning(&filename);
 475             let mut found = false;
 476             let test = test.trim().to_owned();
 477             if let Some(entry) = self.old_tests.get_mut(&name_beg) {
 478                 found = entry.remove_item(&test).is_some();
 479             }
 480             if !found {
 481                 let _ = writeln!(&mut io::stderr(),
 482                                  "WARNING: {} Code block is not currently run as a test, but will \
 483                                   in future versions of rustdoc. Please ensure this code block is \
 484                                   a runnable test, or use the `ignore` directive.",
 485                                  name);
 486                 return
 487             }
 488         }
 489         let cfgs = self.cfgs.clone();
 490         let libs = self.libs.clone();
 491         let externs = self.externs.clone();
 492         let cratename = self.cratename.to_string();
 493         let opts = self.opts.clone();
 494         let maybe_sysroot = self.maybe_sysroot.clone();
 495         debug!("Creating test {}: {}", name, test);
 496         self.tests.push(testing::TestDescAndFn {
 497             desc: testing::TestDesc {
 498                 name: testing::DynTestName(name),
 499                 ignore: should_ignore,
 500                 // compiler failures are test failures
 501                 should_panic: testing::ShouldPanic::No,
 502             },
 503             testfn: testing::DynTestFn(box move |()| {
 504                 let panic = io::set_panic(None);
 505                 let print = io::set_print(None);
 506                 match {
 507                     rustc_driver::in_rustc_thread(move || {
 508                         io::set_panic(panic);
 509                         io::set_print(print);
 510                         runtest(&test,
 511                                 &cratename,
 512                                 cfgs,
 513                                 libs,
 514                                 externs,
 515                                 should_panic,
 516                                 no_run,
 517                                 as_test_harness,
 518                                 compile_fail,
 519                                 error_codes,
 520                                 &opts,
 521                                 maybe_sysroot)
 522                     })
 523                 } {
 524                     Ok(()) => (),
 525                     Err(err) => panic::resume_unwind(err),
 526                 }
 527             }),
 528         });
 529     }
 530
 531     pub fn get_line(&self) -> usize {
 532         if let Some(ref codemap) = self.codemap {
 533             let line = self.position.lo.to_usize();
 534             let line = codemap.lookup_char_pos(BytePos(line as u32)).line;
 535             if line > 0 { line - 1 } else { line }
 536         } else {
 537             0
 538         }
 539     }
 540
 541     pub fn set_position(&mut self, position: Span) {
 542         self.position = position;
 543     }
 544
 545     pub fn get_filename(&self) -> String {
 546         if let Some(ref codemap) = self.codemap {
 547             let filename = codemap.span_to_filename(self.position);
 548             if let Ok(cur_dir) = env::current_dir() {
 549                 if let Ok(path) = Path::new(&filename).strip_prefix(&cur_dir) {
 550                     if let Some(path) = path.to_str() {
 551                         return path.to_owned();
 552                     }
 553                 }
 554             }
 555             filename
 556         } else if let Some(ref filename) = self.filename {
 557             filename.clone()
 558         } else {
 559             "<input>".to_owned()
 560         }
 561     }
 562
 563     pub fn register_header(&mut self, name: &str, level: u32) {
 564         if self.use_headers && level == 1 {
 565             // we use these headings as test names, so it's good if
 566             // they're valid identifiers.
 567             let name = name.chars().enumerate().map(|(i, c)| {
 568                     if (i == 0 && c.is_xid_start()) ||
 569                         (i != 0 && c.is_xid_continue()) {
 570                         c
 571                     } else {
 572                         '_'
 573                     }
 574                 }).collect::<String>();
 575
 576             // new header => reset count.
 577             self.cnt = 0;
 578             self.current_header = Some(name);
 579         }
 580     }
 581 }
 582
 583 struct HirCollector<'a, 'hir: 'a> {
 584     collector: &'a mut Collector,
 585     map: &'a hir::map::Map<'hir>
 586 }
 587
 588 impl<'a, 'hir> HirCollector<'a, 'hir> {
 589     fn visit_testable<F: FnOnce(&mut Self)>(&mut self,
 590                                             name: String,
 591                                             attrs: &[ast::Attribute],
 592                                             nested: F) {
 593         let has_name = !name.is_empty();
 594         if has_name {
 595             self.collector.names.push(name);
 596         }
 597
 598         let mut attrs = Attributes::from_ast(attrs);
 599         attrs.collapse_doc_comments();
 600         attrs.unindent_doc_comments();
 601         if let Some(doc) = attrs.doc_value() {
 602             self.collector.cnt = 0;
 603             if self.collector.render_type == RenderType::Pulldown {
 604                 markdown::old_find_testable_code(doc, self.collector,
 605                                                  attrs.span.unwrap_or(DUMMY_SP));
 606                 markdown::find_testable_code(doc, self.collector,
 607                                              attrs.span.unwrap_or(DUMMY_SP));
 608             } else {
 609                 markdown::old_find_testable_code(doc, self.collector,
 610                                                  attrs.span.unwrap_or(DUMMY_SP));
 611             }
 612         }
 613
 614         nested(self);
 615
 616         if has_name {
 617             self.collector.names.pop();
 618         }
 619     }
 620 }
 621
 622 impl<'a, 'hir> intravisit::Visitor<'hir> for HirCollector<'a, 'hir> {
 623     fn nested_visit_map<'this>(&'this mut self) -> intravisit::NestedVisitorMap<'this, 'hir> {
 624         intravisit::NestedVisitorMap::All(&self.map)
 625     }
 626
 627     fn visit_item(&mut self, item: &'hir hir::Item) {
 628         let name = if let hir::ItemImpl(.., ref ty, _) = item.node {
 629             self.map.node_to_pretty_string(ty.id)
 630         } else {
 631             item.name.to_string()
 632         };
 633
 634         self.visit_testable(name, &item.attrs, |this| {
 635             intravisit::walk_item(this, item);
 636         });
 637     }
 638
 639     fn visit_trait_item(&mut self, item: &'hir hir::TraitItem) {
 640         self.visit_testable(item.name.to_string(), &item.attrs, |this| {
 641             intravisit::walk_trait_item(this, item);
 642         });
 643     }
 644
 645     fn visit_impl_item(&mut self, item: &'hir hir::ImplItem) {
 646         self.visit_testable(item.name.to_string(), &item.attrs, |this| {
 647             intravisit::walk_impl_item(this, item);
 648         });
 649     }
 650
 651     fn visit_foreign_item(&mut self, item: &'hir hir::ForeignItem) {
 652         self.visit_testable(item.name.to_string(), &item.attrs, |this| {
 653             intravisit::walk_foreign_item(this, item);
 654         });
 655     }
 656
 657     fn visit_variant(&mut self,
 658                      v: &'hir hir::Variant,
 659                      g: &'hir hir::Generics,
 660                      item_id: ast::NodeId) {
 661         self.visit_testable(v.node.name.to_string(), &v.node.attrs, |this| {
 662             intravisit::walk_variant(this, v, g, item_id);
 663         });
 664     }
 665
 666     fn visit_struct_field(&mut self, f: &'hir hir::StructField) {
 667         self.visit_testable(f.name.to_string(), &f.attrs, |this| {
 668             intravisit::walk_struct_field(this, f);
 669         });
 670     }
 671
 672     fn visit_macro_def(&mut self, macro_def: &'hir hir::MacroDef) {
 673         self.visit_testable(macro_def.name.to_string(), &macro_def.attrs, |_| ());
 674     }
 675 }