feat(cli/tools): add a subcommand --hide-stacktraces for test (#24095)

cli/args/flags.rs

@@ -403,6 +403,7 @@ pub struct TestFlags {
   pub watch: Option<WatchFlagsWithPaths>,
   pub reporter: TestReporterConfig,
   pub junit_path: Option<String>,
+  pub hide_stacktraces: bool,
 }
 
 #[derive(Clone, Debug, Eq, PartialEq)]
@@ -2999,6 +3000,12 @@ Directory arguments are expanded to all contained files matching the glob
           .value_parser(["pretty", "dot", "junit", "tap"])
           .help_heading(TEST_HEADING)
       )
+      .arg(
+        Arg::new("hide-stacktraces")
+          .long("hide-stacktraces")
+          .help("Hide stack traces for errors in failure test results.")
+          .action(ArgAction::SetTrue)
+      )
       .arg(env_file_arg())
     )
 }
@@ -4920,6 +4927,8 @@ fn test_parse(flags: &mut Flags, matches: &mut ArgMatches) {
     flags.log_level = Some(Level::Error);
   }
 
+  let hide_stacktraces = matches.get_flag("hide-stacktraces");
+
   flags.subcommand = DenoSubcommand::Test(TestFlags {
     no_run,
     doc,
@@ -4935,6 +4944,7 @@ fn test_parse(flags: &mut Flags, matches: &mut ArgMatches) {
     watch: watch_arg_parse_with_paths(matches),
     reporter,
     junit_path,
+    hide_stacktraces,
   });
 }
 
@@ -9015,6 +9025,7 @@ mod tests {
           watch: Default::default(),
           reporter: Default::default(),
           junit_path: None,
+          hide_stacktraces: false,
         }),
         unstable_config: UnstableConfig {
           legacy_flag_enabled: true,
@@ -9102,6 +9113,7 @@ mod tests {
           clean: false,
           watch: Default::default(),
           junit_path: None,
+          hide_stacktraces: false,
         }),
         type_check_mode: TypeCheckMode::Local,
         permissions: PermissionFlags {
@@ -9140,6 +9152,7 @@ mod tests {
           watch: Default::default(),
           reporter: Default::default(),
           junit_path: None,
+          hide_stacktraces: false,
         }),
         type_check_mode: TypeCheckMode::Local,
         permissions: PermissionFlags {
@@ -9182,6 +9195,7 @@ mod tests {
           watch: Default::default(),
           reporter: Default::default(),
           junit_path: None,
+          hide_stacktraces: false,
         }),
         permissions: PermissionFlags {
           no_prompt: true,
@@ -9318,6 +9332,7 @@ mod tests {
           watch: Default::default(),
           reporter: Default::default(),
           junit_path: None,
+          hide_stacktraces: false,
         }),
         permissions: PermissionFlags {
           no_prompt: true,
@@ -9353,6 +9368,7 @@ mod tests {
           watch: Some(Default::default()),
           reporter: Default::default(),
           junit_path: None,
+          hide_stacktraces: false,
         }),
         permissions: PermissionFlags {
           no_prompt: true,
@@ -9387,6 +9403,7 @@ mod tests {
           watch: Some(Default::default()),
           reporter: Default::default(),
           junit_path: None,
+          hide_stacktraces: false,
         }),
         permissions: PermissionFlags {
           no_prompt: true,
@@ -9428,6 +9445,7 @@ mod tests {
           }),
           reporter: Default::default(),
           junit_path: None,
+          hide_stacktraces: false,
         }),
         type_check_mode: TypeCheckMode::Local,
         permissions: PermissionFlags {
@@ -9624,6 +9642,26 @@ mod tests {
     );
   }
 
+  #[test]
+  fn test_hide_stacktraces() {
+    let r = flags_from_vec(svec!["deno", "test", "--hide-stacktraces"]);
+    assert_eq!(
+      r.unwrap(),
+      Flags {
+        subcommand: DenoSubcommand::Test(TestFlags {
+          hide_stacktraces: true,
+          ..TestFlags::default()
+        }),
+        type_check_mode: TypeCheckMode::Local,
+        permissions: PermissionFlags {
+          no_prompt: true,
+          ..Default::default()
+        },
+        ..Flags::default()
+      }
+    );
+  }
+
   #[test]
   fn bundle_with_cafile() {
     let r = flags_from_vec(svec![

cli/args/mod.rs

@@ -377,6 +377,7 @@ pub struct WorkspaceTestOptions {
   pub trace_leaks: bool,
   pub reporter: TestReporterConfig,
   pub junit_path: Option<String>,
+  pub hide_stacktraces: bool,
 }
 
 impl WorkspaceTestOptions {
@@ -394,6 +395,7 @@ impl WorkspaceTestOptions {
       trace_leaks: test_flags.trace_leaks,
       reporter: test_flags.reporter,
       junit_path: test_flags.junit_path.clone(),
+      hide_stacktraces: test_flags.hide_stacktraces,
     }
   }
 }

cli/lsp/testing/execution.rs

@@ -15,6 +15,7 @@ use crate::lsp::logging::lsp_log;
 use crate::tools::test;
 use crate::tools::test::create_test_event_channel;
 use crate::tools::test::FailFastTracker;
+use crate::tools::test::TestFailureFormatOptions;
 
 use deno_core::anyhow::anyhow;
 use deno_core::error::AnyError;
@@ -655,7 +656,10 @@ impl LspTestReporter {
         let desc = self.tests.get(&desc.id).unwrap();
         self.progress(lsp_custom::TestRunProgressMessage::Failed {
           test: desc.as_test_identifier(&self.tests),
-          messages: as_test_messages(failure.to_string(), false),
+          messages: as_test_messages(
+            failure.format(&TestFailureFormatOptions::default()),
+            false,
+          ),
           duration: Some(elapsed as u32),
         })
       }
@@ -675,7 +679,7 @@ impl LspTestReporter {
     let err_string = format!(
       "Uncaught error from {}: {}\nThis error was not caught from a test and caused the test runner to fail on the referenced module.\nIt most likely originated from a dangling promise, event/timeout handler or top-level code.",
       origin,
-      test::fmt::format_test_error(js_error)
+      test::fmt::format_test_error(js_error, &TestFailureFormatOptions::default())
     );
     let messages = as_test_messages(err_string, false);
     for desc in self.tests.values().filter(|d| d.origin() == origin) {
@@ -751,7 +755,10 @@ impl LspTestReporter {
       test::TestStepResult::Failed(failure) => {
         self.progress(lsp_custom::TestRunProgressMessage::Failed {
           test: desc.as_test_identifier(&self.tests),
-          messages: as_test_messages(failure.to_string(), false),
+          messages: as_test_messages(
+            failure.format(&TestFailureFormatOptions::default()),
+            false,
+          ),
           duration: Some(elapsed as u32),
         })
       }

cli/tools/bench/reporters.rs

@@ -2,6 +2,7 @@
 
 use serde::Serialize;
 
+use crate::tools::test::TestFailureFormatOptions;
 use crate::version;
 
 use super::*;
@@ -243,7 +244,10 @@ impl BenchReporter for ConsoleReporter {
             &desc.name,
             &mitata::reporter::Error {
               stack: None,
-              message: format_test_error(js_error),
+              message: format_test_error(
+                js_error,
+                &TestFailureFormatOptions::default()
+              ),
             },
             options
           )
@@ -298,7 +302,7 @@ impl BenchReporter for ConsoleReporter {
     println!(
       "{}: {}",
       colors::red_bold("error"),
-      format_test_error(&error)
+      format_test_error(&error, &TestFailureFormatOptions::default())
     );
     println!("This error was not caught from a benchmark and caused the bench runner to fail on the referenced module.");
     println!("It most likely originated from a dangling promise, event/timeout handler or top-level code.");

cli/tools/jupyter/mod.rs

@@ -11,6 +11,7 @@ use crate::tools::repl;
 use crate::tools::test::create_single_test_event_channel;
 use crate::tools::test::reporters::PrettyTestReporter;
 use crate::tools::test::TestEventWorkerSender;
+use crate::tools::test::TestFailureFormatOptions;
 use crate::CliFactory;
 use deno_core::anyhow::bail;
 use deno_core::anyhow::Context;
@@ -142,7 +143,14 @@ pub async fn kernel(
     })?;
   repl_session.set_test_reporter_factory(Box::new(move || {
     Box::new(
-      PrettyTestReporter::new(false, true, false, true, cwd_url.clone())
+      PrettyTestReporter::new(
+        false,
+        true,
+        false,
+        true,
+        cwd_url.clone(),
+        TestFailureFormatOptions::default(),
+      )
       .with_writer(Box::new(TestWriter(stdio_tx.clone()))),
     )
   }));

cli/tools/repl/session.rs

@@ -16,6 +16,7 @@ use crate::tools::test::send_test_event;
 use crate::tools::test::worker_has_tests;
 use crate::tools::test::TestEvent;
 use crate::tools::test::TestEventReceiver;
+use crate::tools::test::TestFailureFormatOptions;
 
 use deno_ast::diagnostics::Diagnostic;
 use deno_ast::swc::ast as swc_ast;
@@ -276,6 +277,7 @@ impl ReplSession {
           false,
           true,
           cwd_url.clone(),
+          TestFailureFormatOptions::default(),
         ))
       }),
       main_module,

cli/tools/test/fmt.rs

@@ -72,16 +72,24 @@ fn abbreviate_test_error(js_error: &JsError) -> JsError {
 // This function prettifies `JsError` and applies some changes specifically for
 // test runner purposes:
 //
+// - hide stack traces if `options.hide_stacktraces` is set to `true`
+//
 // - filter out stack frames:
 //   - if stack trace consists of mixed user and internal code, the frames
 //     below the first user code frame are filtered out
 //   - if stack trace consists only of internal code it is preserved as is
-pub fn format_test_error(js_error: &JsError) -> String {
+pub fn format_test_error(
+  js_error: &JsError,
+  options: &TestFailureFormatOptions,
+) -> String {
   let mut js_error = abbreviate_test_error(js_error);
   js_error.exception_message = js_error
     .exception_message
     .trim_start_matches("Uncaught ")
     .to_string();
+  if options.hide_stacktraces {
+    return js_error.exception_message;
+  }
   format_js_error(&js_error)
 }
 

cli/tools/test/mod.rs

@@ -288,6 +288,11 @@ impl From<&TestDescription> for TestFailureDescription {
   }
 }
 
+#[derive(Debug, Default, Clone, PartialEq)]
+pub struct TestFailureFormatOptions {
+  pub hide_stacktraces: bool,
+}
+
 #[allow(clippy::derive_partial_eq_without_eq)]
 #[derive(Debug, Clone, PartialEq, Deserialize)]
 #[serde(rename_all = "camelCase")]
@@ -302,52 +307,55 @@ pub enum TestFailure {
   HasSanitizersAndOverlaps(IndexSet<String>), // Long names of overlapped tests
 }
 
-impl std::fmt::Display for TestFailure {
-  fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+impl TestFailure {
+  pub fn format(
+    &self,
+    options: &TestFailureFormatOptions,
+  ) -> Cow<'static, str> {
     match self {
       TestFailure::JsError(js_error) => {
-        write!(f, "{}", format_test_error(js_error))
+        Cow::Owned(format_test_error(js_error, options))
+      }
+      TestFailure::FailedSteps(1) => Cow::Borrowed("1 test step failed."),
+      TestFailure::FailedSteps(n) => {
+        Cow::Owned(format!("{} test steps failed.", n))
       }
-      TestFailure::FailedSteps(1) => write!(f, "1 test step failed."),
-      TestFailure::FailedSteps(n) => write!(f, "{n} test steps failed."),
       TestFailure::IncompleteSteps => {
-        write!(f, "Completed while steps were still running. Ensure all steps are awaited with `await t.step(...)`.")
+        Cow::Borrowed("Completed while steps were still running. Ensure all steps are awaited with `await t.step(...)`.")
       }
       TestFailure::Incomplete => {
-        write!(
-          f,
-          "Didn't complete before parent. Await step with `await t.step(...)`."
-        )
+        Cow::Borrowed("Didn't complete before parent. Await step with `await t.step(...)`.")
       }
       TestFailure::Leaked(details, trailer_notes) => {
-        write!(f, "Leaks detected:")?;
+        let mut f = String::new();
+        write!(f, "Leaks detected:").unwrap();
         for detail in details {
-          write!(f, "\n  - {}", detail)?;
+          write!(f, "\n  - {}", detail).unwrap();
         }
         for trailer in trailer_notes {
-          write!(f, "\n{}", trailer)?;
+          write!(f, "\n{}", trailer).unwrap();
         }
-        Ok(())
+        Cow::Owned(f)
       }
       TestFailure::OverlapsWithSanitizers(long_names) => {
-        write!(f, "Started test step while another test step with sanitizers was running:")?;
+        let mut f = String::new();
+        write!(f, "Started test step while another test step with sanitizers was running:").unwrap();
         for long_name in long_names {
-          write!(f, "\n  * {}", long_name)?;
+          write!(f, "\n  * {}", long_name).unwrap();
         }
-        Ok(())
+        Cow::Owned(f)
       }
       TestFailure::HasSanitizersAndOverlaps(long_names) => {
-        write!(f, "Started test step with sanitizers while another test step was running:")?;
+        let mut f = String::new();
+        write!(f, "Started test step with sanitizers while another test step was running:").unwrap();
         for long_name in long_names {
-          write!(f, "\n  * {}", long_name)?;
+          write!(f, "\n  * {}", long_name).unwrap();
         }
-        Ok(())
+        Cow::Owned(f)
       }
     }
   }
-}
 
-impl TestFailure {
   pub fn overview(&self) -> String {
     match self {
       TestFailure::JsError(js_error) => js_error.exception_message.clone(),
@@ -369,10 +377,6 @@ impl TestFailure {
     }
   }
 
-  pub fn detail(&self) -> String {
-    self.to_string()
-  }
-
   fn format_label(&self) -> String {
     match self {
       TestFailure::Incomplete => colors::gray("INCOMPLETE").to_string(),
@@ -512,6 +516,7 @@ struct TestSpecifiersOptions {
   specifier: TestSpecifierOptions,
   reporter: TestReporterConfig,
   junit_path: Option<String>,
+  hide_stacktraces: bool,
 }
 
 #[derive(Debug, Default, Clone)]
@@ -545,23 +550,31 @@ impl TestSummary {
 
 fn get_test_reporter(options: &TestSpecifiersOptions) -> Box<dyn TestReporter> {
   let parallel = options.concurrent_jobs.get() > 1;
+  let failure_format_options = TestFailureFormatOptions {
+    hide_stacktraces: options.hide_stacktraces,
+  };
   let reporter: Box<dyn TestReporter> = match &options.reporter {
-    TestReporterConfig::Dot => {
-      Box::new(DotTestReporter::new(options.cwd.clone()))
-    }
+    TestReporterConfig::Dot => Box::new(DotTestReporter::new(
+      options.cwd.clone(),
+      failure_format_options,
+    )),
     TestReporterConfig::Pretty => Box::new(PrettyTestReporter::new(
       parallel,
       options.log_level != Some(Level::Error),
       options.filter,
       false,
       options.cwd.clone(),
+      failure_format_options,
+    )),
+    TestReporterConfig::Junit => Box::new(JunitTestReporter::new(
+      options.cwd.clone(),
+      "-".to_string(),
+      failure_format_options,
     )),
-    TestReporterConfig::Junit => {
-      Box::new(JunitTestReporter::new(options.cwd.clone(), "-".to_string()))
-    }
     TestReporterConfig::Tap => Box::new(TapTestReporter::new(
       options.cwd.clone(),
       options.concurrent_jobs > NonZeroUsize::new(1).unwrap(),
+      failure_format_options,
     )),
   };
 
@@ -569,6 +582,9 @@ fn get_test_reporter(options: &TestSpecifiersOptions) -> Box<dyn TestReporter> {
     let junit = Box::new(JunitTestReporter::new(
       options.cwd.clone(),
       junit_path.to_string(),
+      TestFailureFormatOptions {
+        hide_stacktraces: options.hide_stacktraces,
+      },
     ));
     return Box::new(CompoundTestReporter::new(vec![reporter, junit]));
   }
@@ -1807,6 +1823,7 @@ pub async fn run_tests(
       filter: workspace_test_options.filter.is_some(),
       reporter: workspace_test_options.reporter,
       junit_path: workspace_test_options.junit_path,
+      hide_stacktraces: workspace_test_options.hide_stacktraces,
       specifier: TestSpecifierOptions {
         filter: TestFilter::from_flag(&workspace_test_options.filter),
         shuffle: workspace_test_options.shuffle,
@@ -1973,6 +1990,7 @@ pub async fn run_tests_with_watch(
             filter: workspace_test_options.filter.is_some(),
             reporter: workspace_test_options.reporter,
             junit_path: workspace_test_options.junit_path,
+            hide_stacktraces: workspace_test_options.hide_stacktraces,
             specifier: TestSpecifierOptions {
               filter: TestFilter::from_flag(&workspace_test_options.filter),
               shuffle: workspace_test_options.shuffle,

cli/tools/test/reporters/common.rs

@@ -105,6 +105,7 @@ pub(super) fn report_summary(
   cwd: &Url,
   summary: &TestSummary,
   elapsed: &Duration,
+  options: &TestFailureFormatOptions,
 ) {
   if !summary.failures.is_empty() || !summary.uncaught_errors.is_empty() {
     #[allow(clippy::type_complexity)] // Type alias doesn't look better here
@@ -136,7 +137,12 @@ pub(super) fn report_summary(
         if !failure.hide_in_summary() {
           let failure_title = format_test_for_summary(cwd, description);
           writeln!(writer, "{}", &failure_title).unwrap();
-          writeln!(writer, "{}: {}", colors::red_bold("error"), failure)
+          writeln!(
+            writer,
+            "{}: {}",
+            colors::red_bold("error"),
+            failure.format(options)
+          )
           .unwrap();
           writeln!(writer).unwrap();
           failure_titles.push(failure_title);
@@ -152,7 +158,7 @@ pub(super) fn report_summary(
           writer,
           "{}: {}",
           colors::red_bold("error"),
-          format_test_error(js_error)
+          format_test_error(js_error, options)
         )
         .unwrap();
         writeln!(writer, "This error was not caught from a test and caused the test runner to fail on the referenced module.").unwrap();

cli/tools/test/reporters/dot.rs

@@ -9,11 +9,15 @@ pub struct DotTestReporter {
   width: usize,
   cwd: Url,
   summary: TestSummary,
+  failure_format_options: TestFailureFormatOptions,
 }
 
 #[allow(clippy::print_stdout)]
 impl DotTestReporter {
-  pub fn new(cwd: Url) -> DotTestReporter {
+  pub fn new(
+    cwd: Url,
+    failure_format_options: TestFailureFormatOptions,
+  ) -> DotTestReporter {
     let console_width = if let Some(size) = crate::util::console::console_size()
     {
       size.cols as usize
@@ -26,6 +30,7 @@ impl DotTestReporter {
       width: console_width,
       cwd,
       summary: TestSummary::new(),
+      failure_format_options,
     }
   }
 
@@ -190,6 +195,7 @@ impl TestReporter for DotTestReporter {
       &self.cwd,
       &self.summary,
       elapsed,
+      &self.failure_format_options,
     );
     println!();
   }

cli/tools/test/reporters/junit.rs

@@ -15,19 +15,28 @@ pub struct JunitTestReporter {
   // from child to parent to build the full test name that reflects the test
   // hierarchy.
   test_name_tree: TestNameTree,
+  failure_format_options: TestFailureFormatOptions,
 }
 
 impl JunitTestReporter {
-  pub fn new(cwd: Url, output_path: String) -> Self {
+  pub fn new(
+    cwd: Url,
+    output_path: String,
+    failure_format_options: TestFailureFormatOptions,
+  ) -> Self {
     Self {
       cwd,
       output_path,
       cases: IndexMap::new(),
       test_name_tree: TestNameTree::new(),
+      failure_format_options,
     }
   }
 
-  fn convert_status(status: &TestResult) -> quick_junit::TestCaseStatus {
+  fn convert_status(
+    status: &TestResult,
+    failure_format_options: &TestFailureFormatOptions,
+  ) -> quick_junit::TestCaseStatus {
     match status {
       TestResult::Ok => quick_junit::TestCaseStatus::success(),
       TestResult::Ignored => quick_junit::TestCaseStatus::skipped(),
@@ -35,7 +44,7 @@ impl JunitTestReporter {
         kind: quick_junit::NonSuccessKind::Failure,
         message: Some(failure.overview()),
         ty: None,
-        description: Some(failure.detail()),
+        description: Some(failure.format(failure_format_options).into_owned()),
         reruns: vec![],
       },
       TestResult::Cancelled => quick_junit::TestCaseStatus::NonSuccess {
@@ -50,6 +59,7 @@ impl JunitTestReporter {
 
   fn convert_step_status(
     status: &TestStepResult,
+    failure_format_options: &TestFailureFormatOptions,
   ) -> quick_junit::TestCaseStatus {
     match status {
       TestStepResult::Ok => quick_junit::TestCaseStatus::success(),
@@ -59,7 +69,9 @@ impl JunitTestReporter {
           kind: quick_junit::NonSuccessKind::Failure,
           message: Some(failure.overview()),
           ty: None,
-          description: Some(failure.detail()),
+          description: Some(
+            failure.format(failure_format_options).into_owned(),
+          ),
           reruns: vec![],
         }
       }
@@ -111,7 +123,7 @@ impl TestReporter for JunitTestReporter {
     elapsed: u64,
   ) {
     if let Some(case) = self.cases.get_mut(&description.id) {
-      case.status = Self::convert_status(result);
+      case.status = Self::convert_status(result, &self.failure_format_options);
       case.set_time(Duration::from_millis(elapsed));
     }
   }
@@ -153,7 +165,8 @@ impl TestReporter for JunitTestReporter {
     _test_steps: &IndexMap<usize, TestStepDescription>,
   ) {
     if let Some(case) = self.cases.get_mut(&description.id) {
-      case.status = Self::convert_step_status(result);
+      case.status =
+        Self::convert_step_status(result, &self.failure_format_options);
       case.set_time(Duration::from_millis(elapsed));
     }
   }

cli/tools/test/reporters/pretty.rs

@@ -20,6 +20,7 @@ pub struct PrettyTestReporter {
     HashMap<usize, IndexMap<usize, (TestStepDescription, TestStepResult, u64)>>,
   summary: TestSummary,
   writer: Box<dyn std::io::Write>,
+  failure_format_options: TestFailureFormatOptions,
 }
 
 impl PrettyTestReporter {
@@ -29,6 +30,7 @@ impl PrettyTestReporter {
     filter: bool,
     repl: bool,
     cwd: Url,
+    failure_format_options: TestFailureFormatOptions,
   ) -> PrettyTestReporter {
     PrettyTestReporter {
       parallel,
@@ -45,6 +47,7 @@ impl PrettyTestReporter {
       child_results_buffer: Default::default(),
       summary: TestSummary::new(),
       writer: Box::new(std::io::stdout()),
+      failure_format_options,
     }
   }
 
@@ -395,7 +398,13 @@ impl TestReporter for PrettyTestReporter {
     _test_steps: &IndexMap<usize, TestStepDescription>,
   ) {
     self.write_output_end();
-    common::report_summary(&mut self.writer, &self.cwd, &self.summary, elapsed);
+    common::report_summary(
+      &mut self.writer,
+      &self.cwd,
+      &self.summary,
+      elapsed,
+      &self.failure_format_options,
+    );
     if !self.repl {
       writeln!(&mut self.writer).unwrap();
     }

cli/tools/test/reporters/tap.rs

@@ -20,11 +20,16 @@ pub struct TapTestReporter {
   n: usize,
   step_n: usize,
   step_results: HashMap<usize, Vec<(TestStepDescription, TestStepResult)>>,
+  failure_format_options: TestFailureFormatOptions,
 }
 
 #[allow(clippy::print_stdout)]
 impl TapTestReporter {
-  pub fn new(cwd: Url, is_concurrent: bool) -> TapTestReporter {
+  pub fn new(
+    cwd: Url,
+    is_concurrent: bool,
+    failure_format_options: TestFailureFormatOptions,
+  ) -> TapTestReporter {
     TapTestReporter {
       cwd,
       is_concurrent,
@@ -33,6 +38,7 @@ impl TapTestReporter {
       n: 0,
       step_n: 0,
       step_results: HashMap::new(),
+      failure_format_options,
     }
   }
 
@@ -45,6 +51,7 @@ impl TapTestReporter {
   }
 
   fn print_diagnostic(
+    &self,
     indent: usize,
     failure: &TestFailure,
     location: DiagnosticLocation,
@@ -56,7 +63,7 @@ impl TapTestReporter {
     // YAML is a superset of JSON, so we can avoid a YAML dependency here.
     // This makes the output less readable though.
     let diagnostic = serde_json::to_string(&json!({
-      "message": failure.to_string(),
+      "message": failure.format(&self.failure_format_options),
       "severity": "fail".to_string(),
       "at": location,
     }))
@@ -102,7 +109,7 @@ impl TapTestReporter {
     Self::print_line(4, status, self.step_n, &desc.name, directive);
 
     if let TestStepResult::Failed(failure) = result {
-      Self::print_diagnostic(
+      self.print_diagnostic(
         4,
         failure,
         DiagnosticLocation {
@@ -171,7 +178,7 @@ impl TestReporter for TapTestReporter {
     Self::print_line(0, status, self.n, &description.name, directive);
 
     if let TestResult::Failed(failure) = result {
-      Self::print_diagnostic(
+      self.print_diagnostic(
         0,
         failure,
         DiagnosticLocation {

tests/registry/jsr/@std/assert/1.0.0_meta.json

@@ -2,7 +2,7 @@
   "exports": {
     ".": "./mod.ts",
     "./assert": "./assert.ts",
-    "./assert-equals": "./assert-equals.ts",
+    "./assert-equals": "./assert_equals.ts",
     "./fail": "./fail.ts"
   }
 }

tests/specs/remove/basic/add_lock.out

@@ -7,10 +7,10 @@
     },
     "jsr": {
       "@std/assert@1.0.0": {
-        "integrity": "7ae268c58de9693b4997fd93d9b303a47df336664e2008378ccb93c3458d092a"
+        "integrity": "[WILDLINE]"
       },
       "@std/http@1.0.0": {
-        "integrity": "d75bd303c21123a9b58f7249e38b4c0aa3a09f7d76b13f9d7e7842d89052091a"
+        "integrity": "[WILDLINE]"
       }
     }
   },

tests/specs/test/hide_stacktraces/__test__.jsonc

@@ -0,0 +1,24 @@
+{
+  "tests": {
+    "reporter_dot": {
+      "args": "test --hide-stacktraces --reporter=dot main.js",
+      "output": "dot.out",
+      "exitCode": 1
+    },
+    "reporter_junit": {
+      "args": "test --hide-stacktraces --reporter=junit main.js",
+      "output": "junit.out",
+      "exitCode": 1
+    },
+    "reporter_pretty": {
+      "args": "test --hide-stacktraces main.js",
+      "output": "pretty.out",
+      "exitCode": 1
+    },
+    "reporter_tap": {
+      "args": "test --hide-stacktraces --reporter=tap main.js",
+      "output": "tap.out",
+      "exitCode": 1
+    }
+  }
+}

tests/specs/test/hide_stacktraces/dot.out

@@ -0,0 +1,23 @@
+!
+
+ ERRORS 
+
+assert a b => ./main.js:1:6
+error: AssertionError: Values are not equal.
+
+
+    [Diff] Actual / Expected
+
+
+-   foo
++   bar
+
+
+
+ FAILURES 
+
+assert a b => ./main.js:1:6
+
+FAILED | 0 passed | 1 failed ([WILDCARD])
+
+error: Test failed

tests/specs/test/hide_stacktraces/junit.out

@@ -0,0 +1,27 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<testsuites name="deno test" tests="1" failures="1" errors="0" time="[WILDCARD]">
+    <testsuite name="./main.js" tests="1" disabled="0" errors="0" failures="1">
+        <testcase name="assert a b" classname="./main.js" time="[WILDCARD]" line="1" col="6">
+            <failure message="Uncaught AssertionError: Values are not equal.
+
+
+    [Diff] Actual / Expected
+
+
+-   foo
++   bar
+
+">AssertionError: Values are not equal.
+
+
+    [Diff] Actual / Expected
+
+
+-   foo
++   bar
+
+</failure>
+        </testcase>
+    </testsuite>
+</testsuites>
+error: Test failed

tests/specs/test/hide_stacktraces/main.js

@@ -0,0 +1,8 @@
+Deno.test("assert a b", () => {
+  class AssertionError extends Error {
+    name = "AssertionError";
+  }
+  throw new AssertionError(
+    "Values are not equal.\n\n\n    [Diff] Actual / Expected\n\n\n-   foo\n+   bar\n\n",
+  );
+});

tests/specs/test/hide_stacktraces/pretty.out

@@ -0,0 +1,24 @@
+running 1 test from ./main.js
+assert a b ... FAILED ([WILDCARD])
+
+ ERRORS 
+
+assert a b => ./main.js:1:6
+error: AssertionError: Values are not equal.
+
+
+    [Diff] Actual / Expected
+
+
+-   foo
++   bar
+
+
+
+ FAILURES 
+
+assert a b => ./main.js:1:6
+
+FAILED | 0 passed | 1 failed ([WILDCARD])
+
+error: Test failed

tests/specs/test/hide_stacktraces/tap.out

@@ -0,0 +1,8 @@
+TAP version 14
+# ./main.js
+not ok 1 - assert a b
+  ---
+  {"message":"AssertionError: Values are not equal.\n\n\n    [Diff] Actual / Expected\n\n\n-   foo\n+   bar\n\n","severity":"fail","at":{"file":"./main.js","line":1}}
+  ...
+1..1
+error: Test failed