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::cell::{RefCell, Cell};
12 use std::collections::HashMap;
14 use std::ffi::OsString;
15 use std::io::prelude::*;
17 use std::path::PathBuf;
18 use std::panic::{self, AssertRecoverSafe};
19 use std::process::Command;
22 use std::sync::{Arc, Mutex};
26 use rustc::dep_graph::DepGraph;
27 use rustc::front::map as hir_map;
28 use rustc::session::{self, config};
29 use rustc::session::config::{get_unstable_features_setting, OutputType};
30 use rustc::session::search_paths::{SearchPaths, PathKind};
31 use rustc_front::lowering::{lower_crate, LoweringContext};
32 use rustc_back::dynamic_lib::DynamicLibrary;
33 use rustc_back::tempdir::TempDir;
34 use rustc_driver::{driver, Compilation};
35 use rustc_metadata::cstore::CStore;
36 use syntax::codemap::CodeMap;
38 use syntax::errors::emitter::ColorConfig;
39 use syntax::parse::token;
47 use visit_ast::RustdocVisitor;
49 #[derive(Clone, Default)]
50 pub struct TestOptions {
51 pub no_crate_inject: bool,
52 pub attrs: Vec<String>,
55 pub fn run(input: &str,
58 externs: core::Externs,
59 mut test_args: Vec<String>,
60 crate_name: Option<String>)
62 let input_path = PathBuf::from(input);
63 let input = config::Input::File(input_path.clone());
65 let sessopts = config::Options {
66 maybe_sysroot: Some(env::current_exe().unwrap().parent().unwrap()
67 .parent().unwrap().to_path_buf()),
68 search_paths: libs.clone(),
69 crate_types: vec!(config::CrateTypeDylib),
70 externs: externs.clone(),
71 unstable_features: get_unstable_features_setting(),
72 ..config::basic_options().clone()
75 let codemap = Rc::new(CodeMap::new());
76 let diagnostic_handler = errors::Handler::with_tty_emitter(ColorConfig::Auto,
82 let cstore = Rc::new(CStore::new(token::get_ident_interner()));
83 let sess = session::build_session_(sessopts,
84 Some(input_path.clone()),
88 rustc_lint::register_builtins(&mut sess.lint_store.borrow_mut(), Some(&sess));
90 let mut cfg = config::build_configuration(&sess);
91 cfg.extend(config::parse_cfgspecs(cfgs.clone()));
92 let krate = panictry!(driver::phase_1_parse_input(&sess, cfg, &input));
93 let krate = driver::phase_2_configure_and_expand(&sess, &cstore, krate,
95 .expect("phase_2_configure_and_expand aborted in rustdoc!");
96 let krate = driver::assign_node_ids(&sess, krate);
97 let lcx = LoweringContext::new(&sess, Some(&krate));
98 let krate = lower_crate(&lcx, &krate);
100 let opts = scrape_test_config(&krate);
102 let dep_graph = DepGraph::new(false);
103 let _ignore = dep_graph.in_ignore();
104 let mut forest = hir_map::Forest::new(krate, dep_graph.clone());
105 let map = hir_map::map_crate(&mut forest);
107 let ctx = core::DocContext {
109 maybe_typed: core::NotTyped(&sess),
111 external_paths: RefCell::new(Some(HashMap::new())),
112 external_traits: RefCell::new(None),
113 external_typarams: RefCell::new(None),
114 inlined: RefCell::new(None),
115 all_crate_impls: RefCell::new(HashMap::new()),
116 deref_trait_did: Cell::new(None),
119 let mut v = RustdocVisitor::new(&ctx, None);
120 v.visit(ctx.map.krate());
121 let mut krate = v.clean(&ctx);
122 if let Some(name) = crate_name {
125 let (krate, _) = passes::collapse_docs(krate);
126 let (krate, _) = passes::unindent_comments(krate);
128 let mut collector = Collector::new(krate.name.to_string(),
134 collector.fold_crate(krate);
136 test_args.insert(0, "rustdoctest".to_string());
138 testing::test_main(&test_args,
139 collector.tests.into_iter().collect());
143 // Look for #![doc(test(no_crate_inject))], used by crates in the std facade
144 fn scrape_test_config(krate: &::rustc_front::hir::Crate) -> TestOptions {
145 use syntax::attr::AttrMetaMethods;
146 use syntax::print::pprust;
148 let mut opts = TestOptions {
149 no_crate_inject: false,
153 let attrs = krate.attrs.iter()
154 .filter(|a| a.check_name("doc"))
155 .filter_map(|a| a.meta_item_list())
157 .filter(|a| a.check_name("test"))
158 .filter_map(|a| a.meta_item_list())
161 if attr.check_name("no_crate_inject") {
162 opts.no_crate_inject = true;
164 if attr.check_name("attr") {
165 if let Some(l) = attr.meta_item_list() {
167 opts.attrs.push(pprust::meta_item_to_string(item));
176 fn runtest(test: &str, cratename: &str, cfgs: Vec<String>, libs: SearchPaths,
177 externs: core::Externs,
178 should_panic: bool, no_run: bool, as_test_harness: bool,
179 compile_fail: bool, opts: &TestOptions) {
180 // the test harness wants its own `main` & top level functions, so
181 // never wrap the test in `fn main() { ... }`
182 let test = maketest(test, Some(cratename), as_test_harness, opts);
183 let input = config::Input::Str(test.to_string());
184 let mut outputs = HashMap::new();
185 outputs.insert(OutputType::Exe, None);
187 let sessopts = config::Options {
188 maybe_sysroot: Some(env::current_exe().unwrap().parent().unwrap()
189 .parent().unwrap().to_path_buf()),
191 crate_types: vec!(config::CrateTypeExecutable),
192 output_types: outputs,
194 cg: config::CodegenOptions {
195 prefer_dynamic: true,
196 .. config::basic_codegen_options()
198 test: as_test_harness,
199 unstable_features: get_unstable_features_setting(),
200 ..config::basic_options().clone()
203 // Shuffle around a few input and output handles here. We're going to pass
204 // an explicit handle into rustc to collect output messages, but we also
205 // want to catch the error message that rustc prints when it fails.
207 // We take our thread-local stderr (likely set by the test runner) and replace
208 // it with a sink that is also passed to rustc itself. When this function
209 // returns the output of the sink is copied onto the output of our own thread.
211 // The basic idea is to not use a default Handler for rustc, and then also
212 // not print things by default to the actual stderr.
213 struct Sink(Arc<Mutex<Vec<u8>>>);
214 impl Write for Sink {
215 fn write(&mut self, data: &[u8]) -> io::Result<usize> {
216 Write::write(&mut *self.0.lock().unwrap(), data)
218 fn flush(&mut self) -> io::Result<()> { Ok(()) }
220 struct Bomb(Arc<Mutex<Vec<u8>>>, Box<Write+Send>);
223 let _ = self.1.write_all(&self.0.lock().unwrap());
226 let data = Arc::new(Mutex::new(Vec::new()));
227 let codemap = Rc::new(CodeMap::new());
228 let emitter = errors::emitter::EmitterWriter::new(box Sink(data.clone()),
231 let old = io::set_panic(box Sink(data.clone()));
232 let _bomb = Bomb(data, old.unwrap_or(box io::stdout()));
235 let diagnostic_handler = errors::Handler::with_emitter(true, false, box emitter);
237 let cstore = Rc::new(CStore::new(token::get_ident_interner()));
238 let sess = session::build_session_(sessopts,
243 rustc_lint::register_builtins(&mut sess.lint_store.borrow_mut(), Some(&sess));
245 let outdir = Mutex::new(TempDir::new("rustdoctest").ok().expect("rustdoc needs a tempdir"));
246 let libdir = sess.target_filesearch(PathKind::All).get_lib_path();
247 let mut control = driver::CompileController::basic();
248 let mut cfg = config::build_configuration(&sess);
249 cfg.extend(config::parse_cfgspecs(cfgs.clone()));
250 let out = Some(outdir.lock().unwrap().path().to_path_buf());
253 control.after_analysis.stop = Compilation::Stop;
257 let b_sess = AssertRecoverSafe::new(&sess);
258 let b_cstore = AssertRecoverSafe::new(&cstore);
259 let b_cfg = AssertRecoverSafe::new(cfg.clone());
260 let b_control = AssertRecoverSafe::new(&control);
263 driver::compile_input(&b_sess, &b_cstore, (*b_cfg).clone(),
265 &None, None, &b_control)
270 Err(count) if count > 0 && compile_fail == false => {
271 sess.fatal("aborting due to previous error(s)")
273 Ok(()) if compile_fail => panic!("test compiled while it wasn't supposed to"),
277 Err(_) if compile_fail == false => panic!("couldn't compile the test"),
285 // We're careful to prepend the *target* dylib search path to the child's
286 // environment to ensure that the target loads the right libraries at
287 // runtime. It would be a sad day if the *host* libraries were loaded as a
289 let mut cmd = Command::new(&outdir.lock().unwrap().path().join("rust_out"));
290 let var = DynamicLibrary::envvar();
292 let path = env::var_os(var).unwrap_or(OsString::new());
293 let mut path = env::split_paths(&path).collect::<Vec<_>>();
294 path.insert(0, libdir.clone());
295 env::join_paths(path).unwrap()
297 cmd.env(var, &newpath);
300 Err(e) => panic!("couldn't run the test: {}{}", e,
301 if e.kind() == io::ErrorKind::PermissionDenied {
302 " - maybe your tempdir is mounted with noexec?"
305 if should_panic && out.status.success() {
306 panic!("test executable succeeded when it should have failed");
307 } else if !should_panic && !out.status.success() {
308 panic!("test executable failed:\n{}\n{}",
309 str::from_utf8(&out.stdout).unwrap_or(""),
310 str::from_utf8(&out.stderr).unwrap_or(""));
316 pub fn maketest(s: &str, cratename: Option<&str>, dont_insert_main: bool,
317 opts: &TestOptions) -> String {
318 let (crate_attrs, everything_else) = partition_source(s);
320 let mut prog = String::new();
322 // First push any outer attributes from the example, assuming they
323 // are intended to be crate attributes.
324 prog.push_str(&crate_attrs);
326 // Next, any attributes for other aspects such as lints.
327 for attr in &opts.attrs {
328 prog.push_str(&format!("#![{}]\n", attr));
331 // Don't inject `extern crate std` because it's already injected by the
333 if !s.contains("extern crate") && !opts.no_crate_inject && cratename != Some("std") {
334 if let Some(cratename) = cratename {
335 if s.contains(cratename) {
336 prog.push_str(&format!("extern crate {};\n", cratename));
340 if dont_insert_main || s.contains("fn main") {
341 prog.push_str(&everything_else);
343 prog.push_str("fn main() {\n ");
344 prog.push_str(&everything_else.replace("\n", "\n "));
345 prog = prog.trim().into();
346 prog.push_str("\n}");
349 info!("final test program: {}", prog);
354 fn partition_source(s: &str) -> (String, String) {
355 use rustc_unicode::str::UnicodeStr;
357 let mut after_header = false;
358 let mut before = String::new();
359 let mut after = String::new();
361 for line in s.lines() {
362 let trimline = line.trim();
363 let header = trimline.is_whitespace() ||
364 trimline.starts_with("#![feature");
365 if !header || after_header {
367 after.push_str(line);
368 after.push_str("\n");
370 before.push_str(line);
371 before.push_str("\n");
375 return (before, after);
378 pub struct Collector {
379 pub tests: Vec<testing::TestDescAndFn>,
383 externs: core::Externs,
386 current_header: Option<String>,
392 pub fn new(cratename: String, cfgs: Vec<String>, libs: SearchPaths, externs: core::Externs,
393 use_headers: bool, opts: TestOptions) -> Collector {
401 use_headers: use_headers,
402 current_header: None,
403 cratename: cratename,
408 pub fn add_test(&mut self, test: String,
409 should_panic: bool, no_run: bool, should_ignore: bool,
410 as_test_harness: bool, compile_fail: bool) {
411 let name = if self.use_headers {
412 let s = self.current_header.as_ref().map(|s| &**s).unwrap_or("");
413 format!("{}_{}", s, self.cnt)
415 format!("{}_{}", self.names.join("::"), self.cnt)
418 let cfgs = self.cfgs.clone();
419 let libs = self.libs.clone();
420 let externs = self.externs.clone();
421 let cratename = self.cratename.to_string();
422 let opts = self.opts.clone();
423 debug!("Creating test {}: {}", name, test);
424 self.tests.push(testing::TestDescAndFn {
425 desc: testing::TestDesc {
426 name: testing::DynTestName(name),
427 ignore: should_ignore,
428 // compiler failures are test failures
429 should_panic: testing::ShouldPanic::No,
431 testfn: testing::DynTestFn(Box::new(move|| {
446 pub fn register_header(&mut self, name: &str, level: u32) {
447 if self.use_headers && level == 1 {
448 // we use these headings as test names, so it's good if
449 // they're valid identifiers.
450 let name = name.chars().enumerate().map(|(i, c)| {
451 if (i == 0 && c.is_xid_start()) ||
452 (i != 0 && c.is_xid_continue()) {
457 }).collect::<String>();
459 // new header => reset count.
461 self.current_header = Some(name);
466 impl DocFolder for Collector {
467 fn fold_item(&mut self, item: clean::Item) -> Option<clean::Item> {
468 let current_name = match item.name {
469 Some(ref name) if !name.is_empty() => Some(name.clone()),
470 _ => typename_if_impl(&item)
473 let pushed = current_name.map(|name| self.names.push(name)).is_some();
475 if let Some(doc) = item.doc_value() {
477 markdown::find_testable_code(doc, &mut *self);
480 let ret = self.fold_item_recur(item);
487 // FIXME: it would be better to not have the escaped version in the first place
488 fn unescape_for_testname(mut s: String) -> String {
490 if s.contains("&") {
491 s = s.replace("&", "&");
493 // `::&'a mut Foo::` looks weird, let's make it `::<&'a mut Foo>`::
494 if let Some('&') = s.chars().nth(0) {
495 s = format!("<{}>", s);
499 // either `<..>` or `->`
500 if s.contains(">") {
501 s.replace(">", ">")
502 .replace("<", "<")
508 fn typename_if_impl(item: &clean::Item) -> Option<String> {
509 if let clean::ItemEnum::ImplItem(ref impl_) = item.inner {
510 let path = impl_.for_.to_string();
511 let unescaped_path = unescape_for_testname(path);