library/test/src/console.rs

   1 //! Module providing interface for running tests in the console.
   2
   3 use std::fs::File;
   4 use std::io;
   5 use std::io::prelude::Write;
   6 use std::time::Instant;
   7
   8 use super::{
   9     bench::fmt_bench_samples,
  10     cli::TestOpts,
  11     event::{CompletedTest, TestEvent},
  12     filter_tests,
  13     formatters::{JsonFormatter, JunitFormatter, OutputFormatter, PrettyFormatter, TerseFormatter},
  14     helpers::{concurrency::get_concurrency, metrics::MetricMap},
  15     options::{Options, OutputFormat},
  16     run_tests, term,
  17     test_result::TestResult,
  18     time::{TestExecTime, TestSuiteExecTime},
  19     types::{NamePadding, TestDesc, TestDescAndFn},
  20 };
  21
  22 /// Generic wrapper over stdout.
  23 pub enum OutputLocation<T> {
  24     Pretty(Box<term::StdoutTerminal>),
  25     Raw(T),
  26 }
  27
  28 impl<T: Write> Write for OutputLocation<T> {
  29     fn write(&mut self, buf: &[u8]) -> io::Result<usize> {
  30         match *self {
  31             OutputLocation::Pretty(ref mut term) => term.write(buf),
  32             OutputLocation::Raw(ref mut stdout) => stdout.write(buf),
  33         }
  34     }
  35
  36     fn flush(&mut self) -> io::Result<()> {
  37         match *self {
  38             OutputLocation::Pretty(ref mut term) => term.flush(),
  39             OutputLocation::Raw(ref mut stdout) => stdout.flush(),
  40         }
  41     }
  42 }
  43
  44 pub struct ConsoleTestState {
  45     pub log_out: Option<File>,
  46     pub total: usize,
  47     pub passed: usize,
  48     pub failed: usize,
  49     pub ignored: usize,
  50     pub filtered_out: usize,
  51     pub measured: usize,
  52     pub exec_time: Option<TestSuiteExecTime>,
  53     pub metrics: MetricMap,
  54     pub failures: Vec<(TestDesc, Vec<u8>)>,
  55     pub not_failures: Vec<(TestDesc, Vec<u8>)>,
  56     pub time_failures: Vec<(TestDesc, Vec<u8>)>,
  57     pub options: Options,
  58 }
  59
  60 impl ConsoleTestState {
  61     pub fn new(opts: &TestOpts) -> io::Result<ConsoleTestState> {
  62         let log_out = match opts.logfile {
  63             Some(ref path) => Some(File::create(path)?),
  64             None => None,
  65         };
  66
  67         Ok(ConsoleTestState {
  68             log_out,
  69             total: 0,
  70             passed: 0,
  71             failed: 0,
  72             ignored: 0,
  73             filtered_out: 0,
  74             measured: 0,
  75             exec_time: None,
  76             metrics: MetricMap::new(),
  77             failures: Vec::new(),
  78             not_failures: Vec::new(),
  79             time_failures: Vec::new(),
  80             options: opts.options,
  81         })
  82     }
  83
  84     pub fn write_log<F, S>(&mut self, msg: F) -> io::Result<()>
  85     where
  86         S: AsRef<str>,
  87         F: FnOnce() -> S,
  88     {
  89         match self.log_out {
  90             None => Ok(()),
  91             Some(ref mut o) => {
  92                 let msg = msg();
  93                 let msg = msg.as_ref();
  94                 o.write_all(msg.as_bytes())
  95             }
  96         }
  97     }
  98
  99     pub fn write_log_result(
 100         &mut self,
 101         test: &TestDesc,
 102         result: &TestResult,
 103         exec_time: Option<&TestExecTime>,
 104     ) -> io::Result<()> {
 105         self.write_log(|| {
 106             let TestDesc { name, ignore_message, .. } = test;
 107             format!(
 108                 "{} {}",
 109                 match *result {
 110                     TestResult::TrOk => "ok".to_owned(),
 111                     TestResult::TrFailed => "failed".to_owned(),
 112                     TestResult::TrFailedMsg(ref msg) => format!("failed: {msg}"),
 113                     TestResult::TrIgnored => {
 114                         if let Some(msg) = ignore_message {
 115                             format!("ignored: {msg}")
 116                         } else {
 117                             "ignored".to_owned()
 118                         }
 119                     }
 120                     TestResult::TrBench(ref bs) => fmt_bench_samples(bs),
 121                     TestResult::TrTimedFail => "failed (time limit exceeded)".to_owned(),
 122                 },
 123                 name,
 124             )
 125         })?;
 126         if let Some(exec_time) = exec_time {
 127             self.write_log(|| format!(" <{exec_time}>"))?;
 128         }
 129         self.write_log(|| "\n")
 130     }
 131
 132     fn current_test_count(&self) -> usize {
 133         self.passed + self.failed + self.ignored + self.measured
 134     }
 135 }
 136
 137 // List the tests to console, and optionally to logfile. Filters are honored.
 138 pub fn list_tests_console(opts: &TestOpts, tests: Vec<TestDescAndFn>) -> io::Result<()> {
 139     let mut output = match term::stdout() {
 140         None => OutputLocation::Raw(io::stdout().lock()),
 141         Some(t) => OutputLocation::Pretty(t),
 142     };
 143
 144     let quiet = opts.format == OutputFormat::Terse;
 145     let mut st = ConsoleTestState::new(opts)?;
 146
 147     let mut ntest = 0;
 148     let mut nbench = 0;
 149
 150     for test in filter_tests(opts, tests).into_iter() {
 151         use crate::TestFn::*;
 152
 153         let TestDescAndFn { desc: TestDesc { name, .. }, testfn } = test;
 154
 155         let fntype = match testfn {
 156             StaticTestFn(..) | DynTestFn(..) => {
 157                 ntest += 1;
 158                 "test"
 159             }
 160             StaticBenchFn(..) | DynBenchFn(..) => {
 161                 nbench += 1;
 162                 "benchmark"
 163             }
 164         };
 165
 166         writeln!(output, "{name}: {fntype}")?;
 167         st.write_log(|| format!("{fntype} {name}\n"))?;
 168     }
 169
 170     fn plural(count: u32, s: &str) -> String {
 171         match count {
 172             1 => format!("1 {s}"),
 173             n => format!("{n} {s}s"),
 174         }
 175     }
 176
 177     if !quiet {
 178         if ntest != 0 || nbench != 0 {
 179             writeln!(output)?;
 180         }
 181
 182         writeln!(output, "{}, {}", plural(ntest, "test"), plural(nbench, "benchmark"))?;
 183     }
 184
 185     Ok(())
 186 }
 187
 188 // Updates `ConsoleTestState` depending on result of the test execution.
 189 fn handle_test_result(st: &mut ConsoleTestState, completed_test: CompletedTest) {
 190     let test = completed_test.desc;
 191     let stdout = completed_test.stdout;
 192     match completed_test.result {
 193         TestResult::TrOk => {
 194             st.passed += 1;
 195             st.not_failures.push((test, stdout));
 196         }
 197         TestResult::TrIgnored => st.ignored += 1,
 198         TestResult::TrBench(bs) => {
 199             st.metrics.insert_metric(
 200                 test.name.as_slice(),
 201                 bs.ns_iter_summ.median,
 202                 bs.ns_iter_summ.max - bs.ns_iter_summ.min,
 203             );
 204             st.measured += 1
 205         }
 206         TestResult::TrFailed => {
 207             st.failed += 1;
 208             st.failures.push((test, stdout));
 209         }
 210         TestResult::TrFailedMsg(msg) => {
 211             st.failed += 1;
 212             let mut stdout = stdout;
 213             stdout.extend_from_slice(format!("note: {msg}").as_bytes());
 214             st.failures.push((test, stdout));
 215         }
 216         TestResult::TrTimedFail => {
 217             st.failed += 1;
 218             st.time_failures.push((test, stdout));
 219         }
 220     }
 221 }
 222
 223 // Handler for events that occur during test execution.
 224 // It is provided as a callback to the `run_tests` function.
 225 fn on_test_event(
 226     event: &TestEvent,
 227     st: &mut ConsoleTestState,
 228     out: &mut dyn OutputFormatter,
 229 ) -> io::Result<()> {
 230     match (*event).clone() {
 231         TestEvent::TeFiltered(filtered_tests, shuffle_seed) => {
 232             st.total = filtered_tests;
 233             out.write_run_start(filtered_tests, shuffle_seed)?;
 234         }
 235         TestEvent::TeFilteredOut(filtered_out) => {
 236             st.filtered_out = filtered_out;
 237         }
 238         TestEvent::TeWait(ref test) => out.write_test_start(test)?,
 239         TestEvent::TeTimeout(ref test) => out.write_timeout(test)?,
 240         TestEvent::TeResult(completed_test) => {
 241             let test = &completed_test.desc;
 242             let result = &completed_test.result;
 243             let exec_time = &completed_test.exec_time;
 244             let stdout = &completed_test.stdout;
 245
 246             st.write_log_result(test, result, exec_time.as_ref())?;
 247             out.write_result(test, result, exec_time.as_ref(), stdout, st)?;
 248             handle_test_result(st, completed_test);
 249         }
 250     }
 251
 252     Ok(())
 253 }
 254
 255 /// A simple console test runner.
 256 /// Runs provided tests reporting process and results to the stdout.
 257 pub fn run_tests_console(opts: &TestOpts, tests: Vec<TestDescAndFn>) -> io::Result<bool> {
 258     let output = match term::stdout() {
 259         None => OutputLocation::Raw(io::stdout()),
 260         Some(t) => OutputLocation::Pretty(t),
 261     };
 262
 263     let max_name_len = tests
 264         .iter()
 265         .max_by_key(|t| len_if_padded(t))
 266         .map(|t| t.desc.name.as_slice().len())
 267         .unwrap_or(0);
 268
 269     let is_multithreaded = opts.test_threads.unwrap_or_else(get_concurrency) > 1;
 270
 271     let mut out: Box<dyn OutputFormatter> = match opts.format {
 272         OutputFormat::Pretty => Box::new(PrettyFormatter::new(
 273             output,
 274             opts.use_color(),
 275             max_name_len,
 276             is_multithreaded,
 277             opts.time_options,
 278         )),
 279         OutputFormat::Terse => {
 280             Box::new(TerseFormatter::new(output, opts.use_color(), max_name_len, is_multithreaded))
 281         }
 282         OutputFormat::Json => Box::new(JsonFormatter::new(output)),
 283         OutputFormat::Junit => Box::new(JunitFormatter::new(output)),
 284     };
 285     let mut st = ConsoleTestState::new(opts)?;
 286
 287     // Prevent the usage of `Instant` in some cases:
 288     // - It's currently not supported for wasm targets.
 289     // - We disable it for miri because it's not available when isolation is enabled.
 290     let is_instant_supported = !cfg!(target_family = "wasm") && !cfg!(miri);
 291
 292     let start_time = is_instant_supported.then(Instant::now);
 293     run_tests(opts, tests, |x| on_test_event(&x, &mut st, &mut *out))?;
 294     st.exec_time = start_time.map(|t| TestSuiteExecTime(t.elapsed()));
 295
 296     assert!(opts.fail_fast || st.current_test_count() == st.total);
 297
 298     out.write_run_finish(&st)
 299 }
 300
 301 // Calculates padding for given test description.
 302 fn len_if_padded(t: &TestDescAndFn) -> usize {
 303     match t.testfn.padding() {
 304         NamePadding::PadNone => 0,
 305         NamePadding::PadOnRight => t.desc.name.as_slice().len(),
 306     }
 307 }