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.
13 use std::cell::{RefCell, Cell};
14 use std::collections::{HashSet, HashMap};
15 use std::dynamic_lib::DynamicLibrary;
17 use std::ffi::OsString;
18 use std::io::prelude::*;
20 use std::path::PathBuf;
21 use std::process::Command;
24 use std::sync::{Arc, Mutex};
28 use rustc::front::map as hir_map;
29 use rustc::session::{self, config};
30 use rustc::session::config::{get_unstable_features_setting, OutputType};
31 use rustc::session::search_paths::{SearchPaths, PathKind};
32 use rustc_front::lowering::{lower_crate, LoweringContext};
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 = 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 mut forest = hir_map::Forest::new(krate);
103 let map = hir_map::map_crate(&mut forest);
105 let ctx = core::DocContext {
107 maybe_typed: core::NotTyped(&sess),
109 external_paths: RefCell::new(Some(HashMap::new())),
110 external_traits: RefCell::new(None),
111 external_typarams: RefCell::new(None),
112 inlined: RefCell::new(None),
113 populated_crate_impls: RefCell::new(HashSet::new()),
114 deref_trait_did: Cell::new(None),
117 let mut v = RustdocVisitor::new(&ctx, None);
118 v.visit(ctx.map.krate());
119 let mut krate = v.clean(&ctx);
121 Some(name) => krate.name = name,
124 let (krate, _) = passes::collapse_docs(krate);
125 let (krate, _) = passes::unindent_comments(krate);
127 let mut collector = Collector::new(krate.name.to_string(),
133 collector.fold_crate(krate);
135 test_args.insert(0, "rustdoctest".to_string());
137 testing::test_main(&test_args,
138 collector.tests.into_iter().collect());
142 // Look for #![doc(test(no_crate_inject))], used by crates in the std facade
143 fn scrape_test_config(krate: &::rustc_front::hir::Crate) -> TestOptions {
144 use syntax::attr::AttrMetaMethods;
145 use syntax::print::pprust;
147 let mut opts = TestOptions {
148 no_crate_inject: false,
152 let attrs = krate.attrs.iter()
153 .filter(|a| a.check_name("doc"))
154 .filter_map(|a| a.meta_item_list())
156 .filter(|a| a.check_name("test"))
157 .filter_map(|a| a.meta_item_list())
160 if attr.check_name("no_crate_inject") {
161 opts.no_crate_inject = true;
163 if attr.check_name("attr") {
164 if let Some(l) = attr.meta_item_list() {
166 opts.attrs.push(pprust::meta_item_to_string(item));
175 fn runtest(test: &str, cratename: &str, cfgs: Vec<String>, libs: SearchPaths,
176 externs: core::Externs,
177 should_panic: bool, no_run: bool, as_test_harness: bool,
178 opts: &TestOptions) {
179 // the test harness wants its own `main` & top level functions, so
180 // never wrap the test in `fn main() { ... }`
181 let test = maketest(test, Some(cratename), as_test_harness, opts);
182 let input = config::Input::Str(test.to_string());
183 let mut outputs = HashMap::new();
184 outputs.insert(OutputType::Exe, None);
186 let sessopts = config::Options {
187 maybe_sysroot: Some(env::current_exe().unwrap().parent().unwrap()
188 .parent().unwrap().to_path_buf()),
190 crate_types: vec!(config::CrateTypeExecutable),
191 output_types: outputs,
193 cg: config::CodegenOptions {
194 prefer_dynamic: true,
195 .. config::basic_codegen_options()
197 test: as_test_harness,
198 unstable_features: get_unstable_features_setting(),
199 ..config::basic_options().clone()
202 // Shuffle around a few input and output handles here. We're going to pass
203 // an explicit handle into rustc to collect output messages, but we also
204 // want to catch the error message that rustc prints when it fails.
206 // We take our thread-local stderr (likely set by the test runner) and replace
207 // it with a sink that is also passed to rustc itself. When this function
208 // returns the output of the sink is copied onto the output of our own thread.
210 // The basic idea is to not use a default Handler for rustc, and then also
211 // not print things by default to the actual stderr.
212 struct Sink(Arc<Mutex<Vec<u8>>>);
213 impl Write for Sink {
214 fn write(&mut self, data: &[u8]) -> io::Result<usize> {
215 Write::write(&mut *self.0.lock().unwrap(), data)
217 fn flush(&mut self) -> io::Result<()> { Ok(()) }
219 struct Bomb(Arc<Mutex<Vec<u8>>>, Box<Write+Send>);
222 let _ = self.1.write_all(&self.0.lock().unwrap());
225 let data = Arc::new(Mutex::new(Vec::new()));
226 let codemap = Rc::new(CodeMap::new());
227 let emitter = errors::emitter::EmitterWriter::new(box Sink(data.clone()),
230 let old = io::set_panic(box Sink(data.clone()));
231 let _bomb = Bomb(data, old.unwrap_or(box io::stdout()));
234 let diagnostic_handler = errors::Handler::with_emitter(true, false, box emitter);
236 let cstore = Rc::new(CStore::new(token::get_ident_interner()));
237 let sess = session::build_session_(sessopts,
242 rustc_lint::register_builtins(&mut sess.lint_store.borrow_mut(), Some(&sess));
244 let outdir = TempDir::new("rustdoctest").ok().expect("rustdoc needs a tempdir");
245 let out = Some(outdir.path().to_path_buf());
246 let mut cfg = config::build_configuration(&sess);
247 cfg.extend(config::parse_cfgspecs(cfgs));
248 let libdir = sess.target_filesearch(PathKind::All).get_lib_path();
249 let mut control = driver::CompileController::basic();
251 control.after_analysis.stop = Compilation::Stop;
253 let result = driver::compile_input(&sess, &cstore, cfg, &input,
254 &out, &None, None, control);
256 Err(count) if count > 0 => sess.fatal("aborting due to previous error(s)"),
264 // We're careful to prepend the *target* dylib search path to the child's
265 // environment to ensure that the target loads the right libraries at
266 // runtime. It would be a sad day if the *host* libraries were loaded as a
268 let mut cmd = Command::new(&outdir.path().join("rust_out"));
269 let var = DynamicLibrary::envvar();
271 let path = env::var_os(var).unwrap_or(OsString::new());
272 let mut path = env::split_paths(&path).collect::<Vec<_>>();
273 path.insert(0, libdir.clone());
274 env::join_paths(path).unwrap()
276 cmd.env(var, &newpath);
279 Err(e) => panic!("couldn't run the test: {}{}", e,
280 if e.kind() == io::ErrorKind::PermissionDenied {
281 " - maybe your tempdir is mounted with noexec?"
284 if should_panic && out.status.success() {
285 panic!("test executable succeeded when it should have failed");
286 } else if !should_panic && !out.status.success() {
287 panic!("test executable failed:\n{}\n{}",
288 str::from_utf8(&out.stdout).unwrap_or(""),
289 str::from_utf8(&out.stderr).unwrap_or(""));
295 pub fn maketest(s: &str, cratename: Option<&str>, dont_insert_main: bool,
296 opts: &TestOptions) -> String {
297 let (crate_attrs, everything_else) = partition_source(s);
299 let mut prog = String::new();
301 // First push any outer attributes from the example, assuming they
302 // are intended to be crate attributes.
303 prog.push_str(&crate_attrs);
305 // Next, any attributes for other aspects such as lints.
306 for attr in &opts.attrs {
307 prog.push_str(&format!("#![{}]\n", attr));
310 // Don't inject `extern crate std` because it's already injected by the
312 if !s.contains("extern crate") && !opts.no_crate_inject && cratename != Some("std") {
315 if s.contains(cratename) {
316 prog.push_str(&format!("extern crate {};\n", cratename));
322 if dont_insert_main || s.contains("fn main") {
323 prog.push_str(&everything_else);
325 prog.push_str("fn main() {\n ");
326 prog.push_str(&everything_else.replace("\n", "\n "));
327 prog = prog.trim().into();
328 prog.push_str("\n}");
331 info!("final test program: {}", prog);
336 fn partition_source(s: &str) -> (String, String) {
337 use rustc_unicode::str::UnicodeStr;
339 let mut after_header = false;
340 let mut before = String::new();
341 let mut after = String::new();
343 for line in s.lines() {
344 let trimline = line.trim();
345 let header = trimline.is_whitespace() ||
346 trimline.starts_with("#![feature");
347 if !header || after_header {
349 after.push_str(line);
350 after.push_str("\n");
352 before.push_str(line);
353 before.push_str("\n");
357 return (before, after);
360 pub struct Collector {
361 pub tests: Vec<testing::TestDescAndFn>,
365 externs: core::Externs,
368 current_header: Option<String>,
374 pub fn new(cratename: String, cfgs: Vec<String>, libs: SearchPaths, externs: core::Externs,
375 use_headers: bool, opts: TestOptions) -> Collector {
383 use_headers: use_headers,
384 current_header: None,
385 cratename: cratename,
390 pub fn add_test(&mut self, test: String,
391 should_panic: bool, no_run: bool, should_ignore: bool,
392 as_test_harness: bool) {
393 let name = if self.use_headers {
394 let s = self.current_header.as_ref().map(|s| &**s).unwrap_or("");
395 format!("{}_{}", s, self.cnt)
397 format!("{}_{}", self.names.join("::"), self.cnt)
400 let cfgs = self.cfgs.clone();
401 let libs = self.libs.clone();
402 let externs = self.externs.clone();
403 let cratename = self.cratename.to_string();
404 let opts = self.opts.clone();
405 debug!("Creating test {}: {}", name, test);
406 self.tests.push(testing::TestDescAndFn {
407 desc: testing::TestDesc {
408 name: testing::DynTestName(name),
409 ignore: should_ignore,
410 // compiler failures are test failures
411 should_panic: testing::ShouldPanic::No,
413 testfn: testing::DynTestFn(Box::new(move|| {
427 pub fn register_header(&mut self, name: &str, level: u32) {
428 if self.use_headers && level == 1 {
429 // we use these headings as test names, so it's good if
430 // they're valid identifiers.
431 let name = name.chars().enumerate().map(|(i, c)| {
432 if (i == 0 && c.is_xid_start()) ||
433 (i != 0 && c.is_xid_continue()) {
438 }).collect::<String>();
440 // new header => reset count.
442 self.current_header = Some(name);
447 impl DocFolder for Collector {
448 fn fold_item(&mut self, item: clean::Item) -> Option<clean::Item> {
449 let current_name = match item.name {
450 Some(ref name) if !name.is_empty() => Some(name.clone()),
451 _ => typename_if_impl(&item)
454 let pushed = if let Some(name) = current_name {
455 self.names.push(name);
461 if let Some(doc) = item.doc_value() {
463 markdown::find_testable_code(doc, &mut *self);
466 let ret = self.fold_item_recur(item);
473 // FIXME: it would be better to not have the escaped version in the first place
474 fn unescape_for_testname(mut s: String) -> String {
476 if s.contains("&") {
477 s = s.replace("&", "&");
479 // `::&'a mut Foo::` looks weird, let's make it `::<&'a mut Foo>`::
480 if let Some('&') = s.chars().nth(0) {
481 s = format!("<{}>", s);
485 // either `<..>` or `->`
486 if s.contains(">") {
487 s.replace(">", ">")
488 .replace("<", "<")
494 fn typename_if_impl(item: &clean::Item) -> Option<String> {
495 if let clean::ItemEnum::ImplItem(ref impl_) = item.inner {
496 let path = impl_.for_.to_string();
497 let unescaped_path = unescape_for_testname(path);