feat(test): Represent uncaught errors (#14513)

This commit adds better reporting of uncaught errors
in top level scope of testing files. This change affects
both console runner as well as LSP runner.

cli/lsp/testing/execution.rs

@@ -20,6 +20,7 @@ use crate::tools::test::TestEventSender;
 
 use deno_core::anyhow::anyhow;
 use deno_core::error::AnyError;
+use deno_core::error::JsError;
 use deno_core::futures::future;
 use deno_core::futures::stream;
 use deno_core::futures::StreamExt;
@@ -181,7 +182,7 @@ async fn test_specifier(
   permissions: Permissions,
   specifier: ModuleSpecifier,
   mode: test::TestMode,
-  sender: TestEventSender,
+  sender: &TestEventSender,
   token: CancellationToken,
   options: Option<Value>,
 ) -> Result<(), AnyError> {
@@ -337,22 +338,32 @@ impl TestRun {
       let specifier = specifier.clone();
       let ps = ps.clone();
       let permissions = permissions.clone();
-      let sender = sender.clone();
+      let mut sender = sender.clone();
       let options = self.filters.get(&specifier).map(|f| f.as_test_options());
       let token = self.token.clone();
 
       tokio::task::spawn_blocking(move || {
-        let future = test_specifier(
+        let origin = specifier.to_string();
+        let file_result = run_basic(test_specifier(
           ps,
           permissions,
           specifier,
           test::TestMode::Executable,
-          sender,
+          &sender,
           token,
           options,
-        );
-
-        run_basic(future)
+        ));
+        if let Err(error) = file_result {
+          if error.is::<JsError>() {
+            sender.send(test::TestEvent::UncaughtError(
+              origin,
+              Box::new(error.downcast::<JsError>().unwrap()),
+            ))?;
+          } else {
+            return Err(error);
+          }
+        }
+        Ok(())
       })
     });
 
@@ -404,6 +415,11 @@ impl TestRun {
 
               reporter.report_result(&description, &result, elapsed);
             }
+            test::TestEvent::UncaughtError(origin, error) => {
+              reporter.report_uncaught_error(&origin, &error);
+              summary.failed += 1;
+              summary.uncaught_errors.push((origin, error));
+            }
             test::TestEvent::StepWait(description) => {
               reporter.report_step_wait(&description);
             }
@@ -805,6 +821,37 @@ impl test::TestReporter for LspTestReporter {
     }
   }
 
+  fn report_uncaught_error(&mut self, origin: &str, js_error: &JsError) {
+    if self.current_origin == Some(origin.to_string()) {
+      self.current_origin = None;
+    }
+    let stack = self.stack.remove(origin).unwrap_or_default();
+    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::format_test_error(js_error)
+    );
+    let messages = as_test_messages(err_string, false);
+    for t in stack.iter().rev() {
+      match t {
+        TestOrTestStepDescription::TestDescription(desc) => {
+          self.progress(lsp_custom::TestRunProgressMessage::Failed {
+            test: desc.into(),
+            messages: messages.clone(),
+            duration: None,
+          });
+        }
+        TestOrTestStepDescription::TestStepDescription(desc) => {
+          self.progress(lsp_custom::TestRunProgressMessage::Failed {
+            test: desc.into(),
+            messages: messages.clone(),
+            duration: None,
+          });
+        }
+      }
+    }
+  }
+
   fn report_step_wait(&mut self, desc: &test::TestStepDescription) {
     if !self.includes_step(desc) {
       self.add_step(desc);

cli/lsp/testing/lsp_custom.rs

@@ -165,7 +165,7 @@ pub enum TestRunProgressMessage {
   End,
 }
 
-#[derive(Debug, Deserialize, Serialize)]
+#[derive(Clone, Debug, Deserialize, Serialize)]
 #[serde(rename_all = "camelCase")]
 pub struct TestMessage {
   pub message: lsp::MarkupContent,

cli/tests/integration/test_tests.rs

@@ -368,3 +368,9 @@ fn file_protocol() {
   })
   .run();
 }
+
+itest!(uncaught_errors {
+  args: "test --quiet test/uncaught_errors_1.ts test/uncaught_errors_2.ts test/uncaught_errors_3.ts",
+  output: "test/uncaught_errors.out",
+  exit_code: 1,
+});

cli/tests/testdata/compat/test_runner/top_level_fail_cjs.out

@@ -1,7 +1,9 @@
+Uncaught error from ./compat/test_runner/top_level_fail_cjs.js FAILED
 
-test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out ([WILDCARD])
+ ERRORS 
 
-error: Uncaught (in promise) AssertionError: Values are not strictly equal:
+./compat/test_runner/top_level_fail_cjs.js (uncaught error)
+error: (in promise) AssertionError: Values are not strictly equal:
 
 
     [Diff] Actual / Expected
@@ -10,4 +12,16 @@ error: Uncaught (in promise) AssertionError: Values are not strictly equal:
 -   10
 +   20
 
-[WILDCARD]
+    Error.captureStackTrace(this, stackStartFn || stackStartFunction);
+          ^
+    at [WILDCARD]
+This error was not caught from a test and caused the test runner to fail on the referenced module.
+It most likely originated from a dangling promise, event/timeout handler or top-level code.
+
+ FAILURES 
+
+./compat/test_runner/top_level_fail_cjs.js (uncaught error)
+
+test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out ([WILDCARD])
+
+error: Test failed

cli/tests/testdata/compat/test_runner/top_level_fail_esm.out

@@ -1,7 +1,9 @@
+Uncaught error from ./compat/test_runner/top_level_fail_esm.mjs FAILED
 
-test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out ([WILDCARD])
+ ERRORS 
 
-error: Uncaught AssertionError: Values are not strictly equal:
+./compat/test_runner/top_level_fail_esm.mjs (uncaught error)
+error: AssertionError: Values are not strictly equal:
 
 
     [Diff] Actual / Expected
@@ -10,4 +12,16 @@ error: Uncaught AssertionError: Values are not strictly equal:
 -   10
 +   20
 
-[WILDCARD]
+    Error.captureStackTrace(this, stackStartFn || stackStartFunction);
+          ^
+    at [WILDCARD]
+This error was not caught from a test and caused the test runner to fail on the referenced module.
+It most likely originated from a dangling promise, event/timeout handler or top-level code.
+
+ FAILURES 
+
+./compat/test_runner/top_level_fail_esm.mjs (uncaught error)
+
+test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out ([WILDCARD])
+
+error: Test failed

cli/tests/testdata/test/no_check.out

@@ -1,8 +1,19 @@
+Uncaught error from ./test/no_check.ts FAILED
 
-test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out ([WILDCARD])
+ ERRORS 
 
-error: Uncaught TypeError: Cannot read properties of undefined (reading 'fn')
+./test/no_check.ts (uncaught error)
+error: TypeError: Cannot read properties of undefined (reading 'fn')
 Deno.test();
      ^
-    at [WILDCARD]
     at [WILDCARD]/test/no_check.ts:1:6
+This error was not caught from a test and caused the test runner to fail on the referenced module.
+It most likely originated from a dangling promise, event/timeout handler or top-level code.
+
+ FAILURES 
+
+./test/no_check.ts (uncaught error)
+
+test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out ([WILDCARD])
+
+error: Test failed

cli/tests/testdata/test/uncaught_errors.out

@@ -0,0 +1,58 @@
+running 3 tests from ./test/uncaught_errors_1.ts
+foo 1 ... FAILED ([WILDCARD])
+foo 2 ... ok ([WILDCARD])
+foo 3 ...
+Uncaught error from ./test/uncaught_errors_1.ts FAILED
+running 3 tests from ./test/uncaught_errors_2.ts
+bar 1 ... ok ([WILDCARD])
+bar 2 ... FAILED ([WILDCARD])
+bar 3 ... FAILED ([WILDCARD])
+Uncaught error from ./test/uncaught_errors_3.ts FAILED
+
+ ERRORS 
+
+foo 1 => ./test/uncaught_errors_1.ts:1:6
+error: Error: foo 1 message
+  throw new Error("foo 1 message");
+        ^
+    at [WILDCARD]/test/uncaught_errors_1.ts:2:9
+
+./test/uncaught_errors_1.ts (uncaught error)
+error: (in promise) Error: foo 3 message
+  Promise.reject(new Error("foo 3 message"));
+                 ^
+    at [WILDCARD]/test/uncaught_errors_1.ts:8:18
+This error was not caught from a test and caused the test runner to fail on the referenced module.
+It most likely originated from a dangling promise, event/timeout handler or top-level code.
+
+bar 2 => ./test/uncaught_errors_2.ts:3:6
+error: Error: bar 2
+  throw new Error("bar 2");
+        ^
+    at [WILDCARD]/test/uncaught_errors_2.ts:4:9
+
+bar 3 => ./test/uncaught_errors_2.ts:6:6
+error: Error: bar 3 message
+  throw new Error("bar 3 message");
+        ^
+    at [WILDCARD]/test/uncaught_errors_2.ts:7:9
+
+./test/uncaught_errors_3.ts (uncaught error)
+error: Error: baz
+throw new Error("baz");
+      ^
+    at [WILDCARD]/test/uncaught_errors_3.ts:1:7
+This error was not caught from a test and caused the test runner to fail on the referenced module.
+It most likely originated from a dangling promise, event/timeout handler or top-level code.
+
+ FAILURES 
+
+foo 1 => ./test/uncaught_errors_1.ts:1:6
+./test/uncaught_errors_1.ts (uncaught error)
+bar 2 => ./test/uncaught_errors_2.ts:3:6
+bar 3 => ./test/uncaught_errors_2.ts:6:6
+./test/uncaught_errors_3.ts (uncaught error)
+
+test result: FAILED. 2 passed; 5 failed; 0 ignored; 0 measured; 0 filtered out ([WILDCARD])
+
+error: Test failed

cli/tests/testdata/test/uncaught_errors_1.ts

@@ -0,0 +1,9 @@
+Deno.test("foo 1", () => {
+  throw new Error("foo 1 message");
+});
+
+Deno.test("foo 2", () => {});
+
+Deno.test("foo 3", () => {
+  Promise.reject(new Error("foo 3 message"));
+});

cli/tests/testdata/test/uncaught_errors_2.ts

@@ -0,0 +1,8 @@
+Deno.test("bar 1", () => {});
+
+Deno.test("bar 2", () => {
+  throw new Error("bar 2");
+});
+Deno.test("bar 3", () => {
+  throw new Error("bar 3 message");
+});

cli/tests/testdata/test/uncaught_errors_3.ts

@@ -0,0 +1 @@
+throw new Error("baz");

cli/tests/testdata/test/unhandled_rejection.out

@@ -1,10 +1,22 @@
 Check [WILDCARD]/test/unhandled_rejection.ts
+Uncaught error from ./test/unhandled_rejection.ts FAILED
 
-test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out ([WILDCARD])
+ ERRORS 
 
-error: Uncaught (in promise) Error: rejection
+./test/unhandled_rejection.ts (uncaught error)
+error: (in promise) Error: rejection
   reject(new Error("rejection"));
          ^
     at [WILDCARD]/test/unhandled_rejection.ts:2:10
     at new Promise (<anonymous>)
     at [WILDCARD]/test/unhandled_rejection.ts:1:1
+This error was not caught from a test and caused the test runner to fail on the referenced module.
+It most likely originated from a dangling promise, event/timeout handler or top-level code.
+
+ FAILURES 
+
+./test/unhandled_rejection.ts (uncaught error)
+
+test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 0 filtered out ([WILDCARD])
+
+error: Test failed

cli/tools/test.rs

@@ -51,6 +51,7 @@ use rand::seq::SliceRandom;
 use rand::SeedableRng;
 use regex::Regex;
 use serde::Deserialize;
+use std::collections::BTreeMap;
 use std::collections::HashMap;
 use std::collections::HashSet;
 use std::io::Read;
@@ -149,6 +150,7 @@ pub enum TestEvent {
   Wait(TestDescription),
   Output(Vec<u8>),
   Result(TestDescription, TestResult, u64),
+  UncaughtError(String, Box<JsError>),
   StepWait(TestStepDescription),
   StepResult(TestStepDescription, TestStepResult, u64),
 }
@@ -166,6 +168,7 @@ pub struct TestSummary {
   pub filtered_out: usize,
   pub measured: usize,
   pub failures: Vec<(TestDescription, Box<JsError>)>,
+  pub uncaught_errors: Vec<(String, Box<JsError>)>,
 }
 
 #[derive(Debug, Clone, Deserialize)]
@@ -192,6 +195,7 @@ impl TestSummary {
       filtered_out: 0,
       measured: 0,
       failures: Vec::new(),
+      uncaught_errors: Vec::new(),
     }
   }
 
@@ -214,6 +218,7 @@ pub trait TestReporter {
     result: &TestResult,
     elapsed: u64,
   );
+  fn report_uncaught_error(&mut self, origin: &str, error: &JsError);
   fn report_step_wait(&mut self, description: &TestStepDescription);
   fn report_step_result(
     &mut self,
@@ -233,10 +238,11 @@ struct PrettyTestReporter {
   concurrent: bool,
   echo_output: bool,
   deferred_step_output: HashMap<TestDescription, Vec<DeferredStepOutput>>,
-  in_test_count: usize,
+  in_new_line: bool,
   last_wait_output_level: usize,
   cwd: Url,
   did_have_user_output: bool,
+  started_tests: bool,
 }
 
 impl PrettyTestReporter {
@@ -244,16 +250,18 @@ impl PrettyTestReporter {
     PrettyTestReporter {
       concurrent,
       echo_output,
-      in_test_count: 0,
+      in_new_line: true,
       deferred_step_output: HashMap::new(),
       last_wait_output_level: 0,
       cwd: Url::from_directory_path(std::env::current_dir().unwrap()).unwrap(),
       did_have_user_output: false,
+      started_tests: false,
     }
   }
 
   fn force_report_wait(&mut self, description: &TestDescription) {
     print!("{} ...", description.name);
+    self.in_new_line = false;
     // flush for faster feedback when line buffered
     std::io::stdout().flush().unwrap();
     self.last_wait_output_level = 0;
@@ -278,6 +286,7 @@ impl PrettyTestReporter {
       println!();
     }
     print!("{}{} ...", "  ".repeat(description.level), description.name);
+    self.in_new_line = false;
     // flush for faster feedback when line buffered
     std::io::stdout().flush().unwrap();
     self.last_wait_output_level = description.level;
@@ -316,11 +325,13 @@ impl PrettyTestReporter {
         println!("{}{}", "  ".repeat(description.level + 1), line);
       }
     }
+    self.in_new_line = true;
   }
 
   fn write_output_end(&mut self) -> bool {
     if self.did_have_user_output {
       println!("{}", colors::gray("----- output end -----"));
+      self.in_new_line = true;
       self.did_have_user_output = false;
       true
     } else {
@@ -341,13 +352,14 @@ impl TestReporter for PrettyTestReporter {
         self.to_relative_path_or_remote_url(&plan.origin)
       ))
     );
+    self.in_new_line = true;
   }
 
   fn report_wait(&mut self, description: &TestDescription) {
     if !self.concurrent {
       self.force_report_wait(description);
     }
-    self.in_test_count += 1;
+    self.started_tests = true;
   }
 
   fn report_output(&mut self, output: &[u8]) {
@@ -355,10 +367,11 @@ impl TestReporter for PrettyTestReporter {
       return;
     }
 
-    if !self.did_have_user_output && self.in_test_count > 0 {
+    if !self.did_have_user_output && self.started_tests {
       self.did_have_user_output = true;
       println!();
       println!("{}", colors::gray("------- output -------"));
+      self.in_new_line = true;
     }
 
     // output everything to stdout in order to prevent
@@ -372,8 +385,6 @@ impl TestReporter for PrettyTestReporter {
     result: &TestResult,
     elapsed: u64,
   ) {
-    self.in_test_count -= 1;
-
     if self.concurrent {
       self.force_report_wait(description);
 
@@ -414,6 +425,21 @@ impl TestReporter for PrettyTestReporter {
       status,
       colors::gray(format!("({})", display::human_elapsed(elapsed.into())))
     );
+    self.in_new_line = true;
+  }
+
+  fn report_uncaught_error(&mut self, origin: &str, _error: &JsError) {
+    if !self.in_new_line {
+      println!();
+    }
+    println!(
+      "Uncaught error from {} {}",
+      self.to_relative_path_or_remote_url(origin),
+      colors::red("FAILED")
+    );
+    self.in_new_line = true;
+    self.last_wait_output_level = 0;
+    self.did_have_user_output = false;
   }
 
   fn report_step_wait(&mut self, description: &TestStepDescription) {
@@ -450,31 +476,65 @@ impl TestReporter for PrettyTestReporter {
   }
 
   fn report_summary(&mut self, summary: &TestSummary, elapsed: &Duration) {
-    if !summary.failures.is_empty() {
+    if !summary.failures.is_empty() || !summary.uncaught_errors.is_empty() {
+      #[allow(clippy::type_complexity)] // Type alias doesn't look better here
+      let mut failures_by_origin: BTreeMap<
+        String,
+        (Vec<(&TestDescription, &JsError)>, Option<&JsError>),
+      > = BTreeMap::default();
       let mut failure_titles = vec![];
-      println!("\n{}\n", colors::white_bold_on_red(" ERRORS "));
       for (description, js_error) in &summary.failures {
-        let failure_title = format!(
-          "{} {}",
-          &description.name,
-          colors::gray(format!(
-            "=> {}:{}:{}",
-            self
-              .to_relative_path_or_remote_url(&description.location.file_name),
-            description.location.line_number,
-            description.location.column_number
-          ))
-        );
-        println!("{}", &failure_title);
-        println!(
-          "{}: {}",
-          colors::red_bold("error"),
-          format_test_error(js_error)
-        );
-        println!();
-        failure_titles.push(failure_title);
+        let (failures, _) = failures_by_origin
+          .entry(description.origin.clone())
+          .or_default();
+        failures.push((description, js_error.as_ref()));
+      }
+      for (origin, js_error) in &summary.uncaught_errors {
+        let (_, uncaught_error) =
+          failures_by_origin.entry(origin.clone()).or_default();
+        let _ = uncaught_error.insert(js_error.as_ref());
+      }
+      println!("\n{}\n", colors::white_bold_on_red(" ERRORS "));
+      for (origin, (failures, uncaught_error)) in failures_by_origin {
+        for (description, js_error) in failures {
+          let failure_title = format!(
+            "{} {}",
+            &description.name,
+            colors::gray(format!(
+              "=> {}:{}:{}",
+              self.to_relative_path_or_remote_url(
+                &description.location.file_name
+              ),
+              description.location.line_number,
+              description.location.column_number
+            ))
+          );
+          println!("{}", &failure_title);
+          println!(
+            "{}: {}",
+            colors::red_bold("error"),
+            format_test_error(js_error)
+          );
+          println!();
+          failure_titles.push(failure_title);
+        }
+        if let Some(js_error) = uncaught_error {
+          let failure_title = format!(
+            "{} (uncaught error)",
+            self.to_relative_path_or_remote_url(&origin)
+          );
+          println!("{}", &failure_title);
+          println!(
+            "{}: {}",
+            colors::red_bold("error"),
+            format_test_error(js_error)
+          );
+          println!("This error was not caught from a test and caused the test runner to fail on the referenced module.");
+          println!("It most likely originated from a dangling promise, event/timeout handler or top-level code.");
+          println!();
+          failure_titles.push(failure_title);
+        }
       }
-
       println!("{}\n", colors::white_bold_on_red(" FAILURES "));
       for failure_title in failure_titles {
         println!("{}", failure_title);
@@ -510,6 +570,7 @@ impl TestReporter for PrettyTestReporter {
       colors::gray(
         format!("({})", display::human_elapsed(elapsed.as_millis()))),
     );
+    self.in_new_line = true;
   }
 }
 
@@ -586,7 +647,7 @@ async fn test_specifier(
   permissions: Permissions,
   specifier: ModuleSpecifier,
   mode: TestMode,
-  sender: TestEventSender,
+  sender: &TestEventSender,
   options: TestSpecifierOptions,
 ) -> Result<(), AnyError> {
   let mut worker = create_main_worker(
@@ -959,14 +1020,30 @@ async fn test_specifiers(
       let permissions = permissions.clone();
       let specifier = specifier.clone();
       let mode = mode.clone();
-      let sender = sender.clone();
+      let mut sender = sender.clone();
       let options = options.clone();
 
       tokio::task::spawn_blocking(move || {
-        let future =
-          test_specifier(ps, permissions, specifier, mode, sender, options);
-
-        run_basic(future)
+        let origin = specifier.to_string();
+        let file_result = run_basic(test_specifier(
+          ps,
+          permissions,
+          specifier,
+          mode,
+          &sender,
+          options,
+        ));
+        if let Err(error) = file_result {
+          if error.is::<JsError>() {
+            sender.send(TestEvent::UncaughtError(
+              origin,
+              Box::new(error.downcast::<JsError>().unwrap()),
+            ))?;
+          } else {
+            return Err(error);
+          }
+        }
+        Ok(())
       })
     });
 
@@ -1021,6 +1098,12 @@ async fn test_specifiers(
             reporter.report_result(&description, &result, elapsed);
           }
 
+          TestEvent::UncaughtError(origin, error) => {
+            reporter.report_uncaught_error(&origin, &error);
+            summary.failed += 1;
+            summary.uncaught_errors.push((origin, error));
+          }
+
           TestEvent::StepWait(description) => {
             reporter.report_step_wait(&description);
           }