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.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
11 use std::collections::HashMap;
13 use std::ffi::OsString;
14 use std::io::prelude::*;
16 use std::path::{Path, PathBuf};
17 use std::panic::{self, AssertUnwindSafe};
18 use std::process::Command;
21 use std::sync::{Arc, Mutex};
26 use rustc::hir::intravisit;
27 use rustc::session::{self, CompileIncomplete, config};
28 use rustc::session::config::{OutputType, OutputTypes, Externs};
29 use rustc::session::search_paths::{SearchPaths, PathKind};
30 use rustc_metadata::dynamic_lib::DynamicLibrary;
32 use rustc_driver::{self, driver, Compilation};
33 use rustc_driver::driver::phase_2_configure_and_expand;
34 use rustc_metadata::cstore::CStore;
35 use rustc_resolve::MakeGlobMap;
37 use syntax::codemap::CodeMap;
38 use syntax::feature_gate::UnstableFeatures;
39 use syntax_pos::{BytePos, DUMMY_SP, Pos, Span, FileName};
41 use errors::emitter::ColorConfig;
43 use clean::Attributes;
44 use html::markdown::{self, RenderType};
46 #[derive(Clone, Default)]
47 pub struct TestOptions {
48 pub no_crate_inject: bool,
49 pub attrs: Vec<String>,
52 pub fn run(input_path: &Path,
56 mut test_args: Vec<String>,
57 crate_name: Option<String>,
58 maybe_sysroot: Option<PathBuf>,
59 render_type: RenderType,
60 display_warnings: bool,
61 linker: Option<PathBuf>)
63 let input = config::Input::File(input_path.to_owned());
65 let sessopts = config::Options {
66 maybe_sysroot: maybe_sysroot.clone().or_else(
67 || Some(env::current_exe().unwrap().parent().unwrap().parent().unwrap().to_path_buf())),
68 search_paths: libs.clone(),
69 crate_types: vec![config::CrateTypeDylib],
70 externs: externs.clone(),
71 unstable_features: UnstableFeatures::from_environment(),
72 lint_cap: Some(::rustc::lint::Level::Allow),
73 actually_rustdoc: true,
74 ..config::basic_options().clone()
77 let codemap = Rc::new(CodeMap::new(sessopts.file_path_mapping()));
79 errors::Handler::with_tty_emitter(ColorConfig::Auto,
81 Some(codemap.clone()));
83 let mut sess = session::build_session_(
84 sessopts, Some(input_path.to_owned()), handler, codemap.clone(),
86 let trans = rustc_driver::get_trans(&sess);
87 let cstore = Rc::new(CStore::new(trans.metadata_loader()));
88 rustc_lint::register_builtins(&mut sess.lint_store.borrow_mut(), Some(&sess));
89 sess.parse_sess.config =
90 config::build_configuration(&sess, config::parse_cfgspecs(cfgs.clone()));
92 let krate = panictry!(driver::phase_1_parse_input(&driver::CompileController::basic(),
95 let driver::ExpansionResult { defs, mut hir_forest, .. } = {
96 phase_2_configure_and_expand(
105 ).expect("phase_2_configure_and_expand aborted in rustdoc!")
108 let crate_name = crate_name.unwrap_or_else(|| {
109 ::rustc_trans_utils::link::find_crate_name(None, &hir_forest.krate().attrs, &input)
111 let opts = scrape_test_config(hir_forest.krate());
112 let mut collector = Collector::new(crate_name,
125 let map = hir::map::map_crate(&sess, &*cstore, &mut hir_forest, &defs);
126 let krate = map.krate();
127 let mut hir_collector = HirCollector {
129 collector: &mut collector,
132 hir_collector.visit_testable("".to_string(), &krate.attrs, |this| {
133 intravisit::walk_crate(this, krate);
137 test_args.insert(0, "rustdoctest".to_string());
139 testing::test_main(&test_args,
140 collector.tests.into_iter().collect(),
141 testing::Options::new().display_output(display_warnings));
145 // Look for #![doc(test(no_crate_inject))], used by crates in the std facade
146 fn scrape_test_config(krate: &::rustc::hir::Crate) -> TestOptions {
147 use syntax::print::pprust;
149 let mut opts = TestOptions {
150 no_crate_inject: false,
154 let test_attrs: Vec<_> = krate.attrs.iter()
155 .filter(|a| a.check_name("doc"))
156 .flat_map(|a| a.meta_item_list().unwrap_or_else(Vec::new))
157 .filter(|a| a.check_name("test"))
159 let attrs = test_attrs.iter().flat_map(|a| a.meta_item_list().unwrap_or(&[]));
162 if attr.check_name("no_crate_inject") {
163 opts.no_crate_inject = true;
165 if attr.check_name("attr") {
166 if let Some(l) = attr.meta_item_list() {
168 opts.attrs.push(pprust::meta_list_item_to_string(item));
177 fn run_test(test: &str, cratename: &str, filename: &FileName, line: usize,
178 cfgs: Vec<String>, libs: SearchPaths,
180 should_panic: bool, no_run: bool, as_test_harness: bool,
181 compile_fail: bool, mut error_codes: Vec<String>, opts: &TestOptions,
182 maybe_sysroot: Option<PathBuf>,
183 linker: Option<PathBuf>) {
184 // the test harness wants its own `main` & top level functions, so
185 // never wrap the test in `fn main() { ... }`
186 let (test, line_offset) = make_test(test, Some(cratename), as_test_harness, opts);
187 // FIXME(#44940): if doctests ever support path remapping, then this filename
188 // needs to be the result of CodeMap::span_to_unmapped_path
189 let input = config::Input::Str {
190 name: filename.to_owned(),
191 input: test.to_owned(),
193 let outputs = OutputTypes::new(&[(OutputType::Exe, None)]);
195 let sessopts = config::Options {
196 maybe_sysroot: maybe_sysroot.or_else(
197 || Some(env::current_exe().unwrap().parent().unwrap().parent().unwrap().to_path_buf())),
199 crate_types: vec![config::CrateTypeExecutable],
200 output_types: outputs,
202 cg: config::CodegenOptions {
203 prefer_dynamic: true,
205 .. config::basic_codegen_options()
207 test: as_test_harness,
208 unstable_features: UnstableFeatures::from_environment(),
209 ..config::basic_options().clone()
212 // Shuffle around a few input and output handles here. We're going to pass
213 // an explicit handle into rustc to collect output messages, but we also
214 // want to catch the error message that rustc prints when it fails.
216 // We take our thread-local stderr (likely set by the test runner) and replace
217 // it with a sink that is also passed to rustc itself. When this function
218 // returns the output of the sink is copied onto the output of our own thread.
220 // The basic idea is to not use a default Handler for rustc, and then also
221 // not print things by default to the actual stderr.
222 struct Sink(Arc<Mutex<Vec<u8>>>);
223 impl Write for Sink {
224 fn write(&mut self, data: &[u8]) -> io::Result<usize> {
225 Write::write(&mut *self.0.lock().unwrap(), data)
227 fn flush(&mut self) -> io::Result<()> { Ok(()) }
229 struct Bomb(Arc<Mutex<Vec<u8>>>, Box<Write+Send>);
232 let _ = self.1.write_all(&self.0.lock().unwrap());
235 let data = Arc::new(Mutex::new(Vec::new()));
236 let codemap = Rc::new(CodeMap::new_doctest(
237 sessopts.file_path_mapping(), filename.clone(), line as isize - line_offset as isize
239 let emitter = errors::emitter::EmitterWriter::new(box Sink(data.clone()),
240 Some(codemap.clone()),
243 let old = io::set_panic(Some(box Sink(data.clone())));
244 let _bomb = Bomb(data.clone(), old.unwrap_or(box io::stdout()));
247 let diagnostic_handler = errors::Handler::with_emitter(true, false, box emitter);
249 let mut sess = session::build_session_(
250 sessopts, None, diagnostic_handler, codemap,
252 let trans = rustc_driver::get_trans(&sess);
253 let cstore = Rc::new(CStore::new(trans.metadata_loader()));
254 rustc_lint::register_builtins(&mut sess.lint_store.borrow_mut(), Some(&sess));
256 let outdir = Mutex::new(TempDir::new("rustdoctest").ok().expect("rustdoc needs a tempdir"));
257 let libdir = sess.target_filesearch(PathKind::All).get_lib_path();
258 let mut control = driver::CompileController::basic();
259 sess.parse_sess.config =
260 config::build_configuration(&sess, config::parse_cfgspecs(cfgs.clone()));
261 let out = Some(outdir.lock().unwrap().path().to_path_buf());
264 control.after_analysis.stop = Compilation::Stop;
267 let res = panic::catch_unwind(AssertUnwindSafe(|| {
268 driver::compile_input(
281 let compile_result = match res {
282 Ok(Ok(())) | Ok(Err(CompileIncomplete::Stopped)) => Ok(()),
283 Err(_) | Ok(Err(CompileIncomplete::Errored(_))) => Err(())
286 match (compile_result, compile_fail) {
288 panic!("test compiled while it wasn't supposed to")
290 (Ok(()), false) => {}
292 if error_codes.len() > 0 {
293 let out = String::from_utf8(data.lock().unwrap().to_vec()).unwrap();
294 error_codes.retain(|err| !out.contains(err));
297 (Err(()), false) => {
298 panic!("couldn't compile the test")
302 if error_codes.len() > 0 {
303 panic!("Some expected error codes were not found: {:?}", error_codes);
310 // We're careful to prepend the *target* dylib search path to the child's
311 // environment to ensure that the target loads the right libraries at
312 // runtime. It would be a sad day if the *host* libraries were loaded as a
314 let mut cmd = Command::new(&outdir.lock().unwrap().path().join("rust_out"));
315 let var = DynamicLibrary::envvar();
317 let path = env::var_os(var).unwrap_or(OsString::new());
318 let mut path = env::split_paths(&path).collect::<Vec<_>>();
319 path.insert(0, libdir.clone());
320 env::join_paths(path).unwrap()
322 cmd.env(var, &newpath);
325 Err(e) => panic!("couldn't run the test: {}{}", e,
326 if e.kind() == io::ErrorKind::PermissionDenied {
327 " - maybe your tempdir is mounted with noexec?"
330 if should_panic && out.status.success() {
331 panic!("test executable succeeded when it should have failed");
332 } else if !should_panic && !out.status.success() {
333 panic!("test executable failed:\n{}\n{}\n",
334 str::from_utf8(&out.stdout).unwrap_or(""),
335 str::from_utf8(&out.stderr).unwrap_or(""));
341 /// Makes the test file. Also returns the number of lines before the code begins
342 pub fn make_test(s: &str,
343 cratename: Option<&str>,
344 dont_insert_main: bool,
347 let (crate_attrs, everything_else) = partition_source(s);
348 let everything_else = everything_else.trim();
349 let mut line_offset = 0;
350 let mut prog = String::new();
352 if opts.attrs.is_empty() {
353 // If there aren't any attributes supplied by #![doc(test(attr(...)))], then allow some
354 // lints that are commonly triggered in doctests. The crate-level test attributes are
355 // commonly used to make tests fail in case they trigger warnings, so having this there in
356 // that case may cause some tests to pass when they shouldn't have.
357 prog.push_str("#![allow(unused)]\n");
361 // Next, any attributes that came from the crate root via #![doc(test(attr(...)))].
362 for attr in &opts.attrs {
363 prog.push_str(&format!("#![{}]\n", attr));
367 // Now push any outer attributes from the example, assuming they
368 // are intended to be crate attributes.
369 prog.push_str(&crate_attrs);
371 // Don't inject `extern crate std` because it's already injected by the
373 if !s.contains("extern crate") && !opts.no_crate_inject && cratename != Some("std") {
374 if let Some(cratename) = cratename {
375 if s.contains(cratename) {
376 prog.push_str(&format!("extern crate {};\n", cratename));
382 // FIXME (#21299): prefer libsyntax or some other actual parser over this
383 // best-effort ad hoc approach
384 let already_has_main = s.lines()
386 let comment = line.find("//");
387 if let Some(comment_begins) = comment {
388 &line[0..comment_begins]
393 .any(|code| code.contains("fn main"));
395 if dont_insert_main || already_has_main {
396 prog.push_str(everything_else);
398 prog.push_str("fn main() {\n");
400 prog.push_str(everything_else);
401 prog.push_str("\n}");
404 info!("final test program: {}", prog);
409 // FIXME(aburka): use a real parser to deal with multiline attributes
410 fn partition_source(s: &str) -> (String, String) {
411 use std_unicode::str::UnicodeStr;
413 let mut after_header = false;
414 let mut before = String::new();
415 let mut after = String::new();
417 for line in s.lines() {
418 let trimline = line.trim();
419 let header = trimline.is_whitespace() ||
420 trimline.starts_with("#![");
421 if !header || after_header {
423 after.push_str(line);
424 after.push_str("\n");
426 before.push_str(line);
427 before.push_str("\n");
434 pub struct Collector {
435 pub tests: Vec<testing::TestDescAndFn>,
436 // to be removed when hoedown will be definitely gone
437 pub old_tests: HashMap<String, Vec<String>>,
439 // The name of the test displayed to the user, separated by `::`.
441 // In tests from Rust source, this is the path to the item
442 // e.g. `["std", "vec", "Vec", "push"]`.
444 // In tests from a markdown file, this is the titles of all headers (h1~h6)
445 // of the sections that contain the code block, e.g. if the markdown file is
458 // the `names` vector of that test will be `["Title", "Subtitle"]`.
467 maybe_sysroot: Option<PathBuf>,
469 codemap: Option<Rc<CodeMap>>,
470 filename: Option<PathBuf>,
471 // to be removed when hoedown will be removed as well
472 pub render_type: RenderType,
473 linker: Option<PathBuf>,
477 pub fn new(cratename: String, cfgs: Vec<String>, libs: SearchPaths, externs: Externs,
478 use_headers: bool, opts: TestOptions, maybe_sysroot: Option<PathBuf>,
479 codemap: Option<Rc<CodeMap>>, filename: Option<PathBuf>,
480 render_type: RenderType, linker: Option<PathBuf>) -> Collector {
483 old_tests: HashMap::new(),
500 fn generate_name(&self, line: usize, filename: &FileName) -> String {
501 format!("{} - {} (line {})", filename, self.names.join("::"), line)
504 // to be removed once hoedown is gone
505 fn generate_name_beginning(&self, filename: &FileName) -> String {
506 format!("{} - {} (line", filename, self.names.join("::"))
509 pub fn add_old_test(&mut self, test: String, filename: FileName) {
510 let name_beg = self.generate_name_beginning(&filename);
511 let entry = self.old_tests.entry(name_beg)
512 .or_insert(Vec::new());
513 entry.push(test.trim().to_owned());
516 pub fn add_test(&mut self, test: String,
517 should_panic: bool, no_run: bool, should_ignore: bool,
518 as_test_harness: bool, compile_fail: bool, error_codes: Vec<String>,
519 line: usize, filename: FileName, allow_fail: bool) {
520 let name = self.generate_name(line, &filename);
521 // to be removed when hoedown is removed
522 if self.render_type == RenderType::Pulldown {
523 let name_beg = self.generate_name_beginning(&filename);
524 let mut found = false;
525 let test = test.trim().to_owned();
526 if let Some(entry) = self.old_tests.get_mut(&name_beg) {
527 found = entry.remove_item(&test).is_some();
530 eprintln!("WARNING: {} Code block is not currently run as a test, but will \
531 in future versions of rustdoc. Please ensure this code block is \
532 a runnable test, or use the `ignore` directive.",
537 let cfgs = self.cfgs.clone();
538 let libs = self.libs.clone();
539 let externs = self.externs.clone();
540 let cratename = self.cratename.to_string();
541 let opts = self.opts.clone();
542 let maybe_sysroot = self.maybe_sysroot.clone();
543 let linker = self.linker.clone();
544 debug!("Creating test {}: {}", name, test);
545 self.tests.push(testing::TestDescAndFn {
546 desc: testing::TestDesc {
547 name: testing::DynTestName(name),
548 ignore: should_ignore,
549 // compiler failures are test failures
550 should_panic: testing::ShouldPanic::No,
553 testfn: testing::DynTestFn(box move || {
554 let panic = io::set_panic(None);
555 let print = io::set_print(None);
557 rustc_driver::in_rustc_thread(move || {
558 io::set_panic(panic);
559 io::set_print(print);
578 Err(err) => panic::resume_unwind(err),
584 pub fn get_line(&self) -> usize {
585 if let Some(ref codemap) = self.codemap {
586 let line = self.position.lo().to_usize();
587 let line = codemap.lookup_char_pos(BytePos(line as u32)).line;
588 if line > 0 { line - 1 } else { line }
594 pub fn set_position(&mut self, position: Span) {
595 self.position = position;
598 pub fn get_filename(&self) -> FileName {
599 if let Some(ref codemap) = self.codemap {
600 let filename = codemap.span_to_filename(self.position);
601 if let FileName::Real(ref filename) = filename {
602 if let Ok(cur_dir) = env::current_dir() {
603 if let Ok(path) = filename.strip_prefix(&cur_dir) {
604 return path.to_owned().into();
609 } else if let Some(ref filename) = self.filename {
610 filename.clone().into()
612 FileName::Custom("input".to_owned())
616 pub fn register_header(&mut self, name: &str, level: u32) {
617 if self.use_headers {
618 // we use these headings as test names, so it's good if
619 // they're valid identifiers.
620 let name = name.chars().enumerate().map(|(i, c)| {
621 if (i == 0 && c.is_xid_start()) ||
622 (i != 0 && c.is_xid_continue()) {
627 }).collect::<String>();
629 // Here we try to efficiently assemble the header titles into the
630 // test name in the form of `h1::h2::h3::h4::h5::h6`.
632 // Suppose originally `self.names` contains `[h1, h2, h3]`...
633 let level = level as usize;
634 if level <= self.names.len() {
635 // ... Consider `level == 2`. All headers in the lower levels
636 // are irrelevant in this new level. So we should reset
637 // `self.names` to contain headers until <h2>, and replace that
638 // slot with the new name: `[h1, name]`.
639 self.names.truncate(level);
640 self.names[level - 1] = name;
642 // ... On the other hand, consider `level == 5`. This means we
643 // need to extend `self.names` to contain five headers. We fill
644 // in the missing level (<h4>) with `_`. Thus `self.names` will
645 // become `[h1, h2, h3, "_", name]`.
646 if level - 1 > self.names.len() {
647 self.names.resize(level - 1, "_".to_owned());
649 self.names.push(name);
655 struct HirCollector<'a, 'hir: 'a> {
656 sess: &'a session::Session,
657 collector: &'a mut Collector,
658 map: &'a hir::map::Map<'hir>
661 impl<'a, 'hir> HirCollector<'a, 'hir> {
662 fn visit_testable<F: FnOnce(&mut Self)>(&mut self,
664 attrs: &[ast::Attribute],
666 let mut attrs = Attributes::from_ast(self.sess.diagnostic(), attrs);
667 if let Some(ref cfg) = attrs.cfg {
668 if !cfg.matches(&self.sess.parse_sess, Some(&self.sess.features.borrow())) {
673 let has_name = !name.is_empty();
675 self.collector.names.push(name);
678 attrs.collapse_doc_comments();
679 attrs.unindent_doc_comments();
680 // the collapse-docs pass won't combine sugared/raw doc attributes, or included files with
681 // anything else, this will combine them for us
682 if let Some(doc) = attrs.collapsed_doc_value() {
683 if self.collector.render_type == RenderType::Pulldown {
684 markdown::old_find_testable_code(&doc, self.collector,
685 attrs.span.unwrap_or(DUMMY_SP));
686 markdown::find_testable_code(&doc, self.collector,
687 attrs.span.unwrap_or(DUMMY_SP));
689 markdown::old_find_testable_code(&doc, self.collector,
690 attrs.span.unwrap_or(DUMMY_SP));
697 self.collector.names.pop();
702 impl<'a, 'hir> intravisit::Visitor<'hir> for HirCollector<'a, 'hir> {
703 fn nested_visit_map<'this>(&'this mut self) -> intravisit::NestedVisitorMap<'this, 'hir> {
704 intravisit::NestedVisitorMap::All(&self.map)
707 fn visit_item(&mut self, item: &'hir hir::Item) {
708 let name = if let hir::ItemImpl(.., ref ty, _) = item.node {
709 self.map.node_to_pretty_string(ty.id)
711 item.name.to_string()
714 self.visit_testable(name, &item.attrs, |this| {
715 intravisit::walk_item(this, item);
719 fn visit_trait_item(&mut self, item: &'hir hir::TraitItem) {
720 self.visit_testable(item.name.to_string(), &item.attrs, |this| {
721 intravisit::walk_trait_item(this, item);
725 fn visit_impl_item(&mut self, item: &'hir hir::ImplItem) {
726 self.visit_testable(item.name.to_string(), &item.attrs, |this| {
727 intravisit::walk_impl_item(this, item);
731 fn visit_foreign_item(&mut self, item: &'hir hir::ForeignItem) {
732 self.visit_testable(item.name.to_string(), &item.attrs, |this| {
733 intravisit::walk_foreign_item(this, item);
737 fn visit_variant(&mut self,
738 v: &'hir hir::Variant,
739 g: &'hir hir::Generics,
740 item_id: ast::NodeId) {
741 self.visit_testable(v.node.name.to_string(), &v.node.attrs, |this| {
742 intravisit::walk_variant(this, v, g, item_id);
746 fn visit_struct_field(&mut self, f: &'hir hir::StructField) {
747 self.visit_testable(f.name.to_string(), &f.attrs, |this| {
748 intravisit::walk_struct_field(this, f);
752 fn visit_macro_def(&mut self, macro_def: &'hir hir::MacroDef) {
753 self.visit_testable(macro_def.name.to_string(), ¯o_def.attrs, |_| ());