feat(cli): Adding JUnit test reports (#19747)

This commit makes the following changes
- Created a `CompoundTestReporter` to allow us to use multiple reporters
- Implements `JUnitTestReporter` which writes JUnit XML to a path
- Added a CLI flag/option `--junit` that enables JUnit reporting. By
default this writes the report to `stdout` (and disables pretty
reporting). If a path is provided, it will write the JUnit report to
that file while the pretty reporter writes to stdout like normal

Output of `deno -- test --allow-all --unstable
--location=http://js-unit-tests/foo/bar --junit
cli/tests/unit/testing_test.ts `
```xml
<?xml version="1.0" encoding="UTF-8"?>
<testsuites name="deno test" tests="7" failures="0" errors="0" time="0.176">
    <testsuite name="file:///Users/cooper/deno/deno/cli/tests/unit/testing_test.ts" tests="7" disabled="0" errors="0" failures="0">
        <testcase name="testWrongOverloads" time="0.012">
        </testcase>
        <testcase name="nameOfTestCaseCantBeEmpty" time="0.009">
        </testcase>
        <testcase name="invalidStepArguments" time="0.008">
        </testcase>
        <testcase name="nameOnTextContext" time="0.029">
            <properties>
                <property name="step[passed]" value="step ... nested step"/>
                <property name="step[passed]" value="step"/>
            </properties>
        </testcase>
        <testcase name="originOnTextContext" time="0.030">
            <properties>
                <property name="step[passed]" value="step ... nested step"/>
                <property name="step[passed]" value="step"/>
            </properties>
        </testcase>
        <testcase name="parentOnTextContext" time="0.030">
            <properties>
                <property name="step[passed]" value="step ... nested step"/>
                <property name="step[passed]" value="step"/>
            </properties>
        </testcase>
        <testcase name="explicit undefined for boolean options" time="0.009">
        </testcase>
    </testsuite>
</testsuites>
```

.gitignore

@@ -28,3 +28,6 @@ gclient_config.py_entries
 /tools/wpt/certs/serial*
 
 /ext/websocket/autobahn/reports
+
+# JUnit files produced by deno test --junit
+junit.xml

Cargo.lock

@@ -114,6 +114,15 @@ version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e999941b234f3131b00bc13c22d06e8c5ff726d1b6318ac7eb276997bbb4fef0"
 
+[[package]]
+name = "android_system_properties"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "819e7219dbd41043ac279b19830f2efc897156490d7fd6ea916720117ee66311"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "anstream"
 version = "0.3.2"
@@ -188,7 +197,7 @@ dependencies = [
  "num-traits",
  "rusticata-macros",
  "thiserror",
- "time",
+ "time 0.3.20",
 ]
 
 [[package]]
@@ -514,7 +523,12 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ec837a71355b28f6556dbd569b37b3f363091c0bd4b2e735674521b4c5fd9bc5"
 dependencies = [
  "android-tzdata",
+ "iana-time-zone",
+ "js-sys",
  "num-traits",
+ "time 0.1.45",
+ "wasm-bindgen",
+ "winapi",
 ]
 
 [[package]]
@@ -833,7 +847,7 @@ dependencies = [
  "http",
  "hyper 0.14.26",
  "import_map",
- "indexmap",
+ "indexmap 1.9.2",
  "jsonc-parser",
  "junction",
  "lazy-regex",
@@ -849,6 +863,7 @@ dependencies = [
  "percent-encoding",
  "pin-project",
  "pretty_assertions",
+ "quick-junit",
  "rand",
  "regex",
  "ring",
@@ -982,7 +997,7 @@ dependencies = [
  "bytes",
  "deno_ops",
  "futures",
- "indexmap",
+ "indexmap 1.9.2",
  "libc",
  "log",
  "once_cell",
@@ -1130,7 +1145,7 @@ dependencies = [
  "deno_ast",
  "deno_semver",
  "futures",
- "indexmap",
+ "indexmap 1.9.2",
  "monch",
  "once_cell",
  "parking_lot 0.12.1",
@@ -1294,7 +1309,7 @@ dependencies = [
  "hex",
  "hkdf",
  "idna 0.3.0",
- "indexmap",
+ "indexmap 1.9.2",
  "lazy-regex",
  "libz-sys",
  "md-5",
@@ -1669,7 +1684,7 @@ checksum = "e6563addfa2b6c6fa96acdda0341090beba2c5c4ff6ef91f3a232a6d4dd34156"
 dependencies = [
  "anyhow",
  "bumpalo",
- "indexmap",
+ "indexmap 1.9.2",
  "rustc-hash",
  "serde",
  "unicode-width",
@@ -1902,6 +1917,12 @@ dependencies = [
  "termcolor",
 ]
 
+[[package]]
+name = "equivalent"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "88bffebc5d80432c9b140ee17875ff173a8ab62faad5b257da912bd2f6c1c0a1"
+
 [[package]]
 name = "errno"
 version = "0.2.8"
@@ -2349,7 +2370,7 @@ dependencies = [
  "futures-sink",
  "futures-util",
  "http",
- "indexmap",
+ "indexmap 1.9.2",
  "slab",
  "tokio",
  "tokio-util",
@@ -2371,6 +2392,12 @@ dependencies = [
  "ahash 0.8.3",
 ]
 
+[[package]]
+name = "hashbrown"
+version = "0.14.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2c6201b9ff9fd90a5a3bac2e56a830d0caa509576f0e503818ee82c181b3437a"
+
 [[package]]
 name = "hashlink"
 version = "0.8.2"
@@ -2554,6 +2581,29 @@ dependencies = [
  "tokio-rustls",
 ]
 
+[[package]]
+name = "iana-time-zone"
+version = "0.1.57"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2fad5b825842d2b38bd206f3e81d6957625fd7f0a361e345c30e01a0ae2dd613"
+dependencies = [
+ "android_system_properties",
+ "core-foundation-sys",
+ "iana-time-zone-haiku",
+ "js-sys",
+ "wasm-bindgen",
+ "windows",
+]
+
+[[package]]
+name = "iana-time-zone-haiku"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f31827a206f56af32e590ba56d5d2d085f558508192593743f16b2306495269f"
+dependencies = [
+ "cc",
+]
+
 [[package]]
 name = "idna"
 version = "0.2.3"
@@ -2588,7 +2638,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "632089ec08bd62e807311104122fb26d5c911ab172e2b9864be154a575979e29"
 dependencies = [
  "cfg-if",
- "indexmap",
+ "indexmap 1.9.2",
  "log",
  "serde",
  "serde_json",
@@ -2606,6 +2656,16 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "indexmap"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d5477fe2230a79769d8dc68e0eabf5437907c0457a5614a9e8dddb67f65eb65d"
+dependencies = [
+ "equivalent",
+ "hashbrown 0.14.0",
+]
+
 [[package]]
 name = "inotify"
 version = "0.9.6"
@@ -3143,6 +3203,12 @@ version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e4a24736216ec316047a1fc4252e27dabb04218aa4a3f37c6e7ddbf1f9782b54"
 
+[[package]]
+name = "nextest-workspace-hack"
+version = "0.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d906846a98739ed9d73d66e62c2641eef8321f1734b7a1156ab045a0248fb2b3"
+
 [[package]]
 name = "nibble_vec"
 version = "0.1.0"
@@ -3513,7 +3579,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4dd7d28ee937e54fe3080c91faa1c3a46c06de6252988a7f4592ba2310ef22a4"
 dependencies = [
  "fixedbitset",
- "indexmap",
+ "indexmap 1.9.2",
 ]
 
 [[package]]
@@ -3791,6 +3857,29 @@ version = "1.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a1d01941d82fa2ab50be1e79e6714289dd7cde78eba4c074bc5a4374f650dfe0"
 
+[[package]]
+name = "quick-junit"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6bf780b59d590c25f8c59b44c124166a2a93587868b619fb8f5b47fb15e9ed6d"
+dependencies = [
+ "chrono",
+ "indexmap 2.0.0",
+ "nextest-workspace-hack",
+ "quick-xml",
+ "thiserror",
+ "uuid",
+]
+
+[[package]]
+name = "quick-xml"
+version = "0.29.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "81b9228215d82c7b61490fec1de287136b5de6f5700f6e58ea9ad61a7964ca51"
+dependencies = [
+ "memchr",
+]
+
 [[package]]
 name = "quote"
 version = "0.6.13"
@@ -4361,7 +4450,7 @@ version = "1.0.94"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1c533a59c9d8a93a09c6ab31f0fd5e5f4dd1b8fc9434804029839884765d04ea"
 dependencies = [
- "indexmap",
+ "indexmap 1.9.2",
  "itoa",
  "ryu",
  "serde",
@@ -4700,7 +4789,7 @@ dependencies = [
  "ahash 0.7.6",
  "anyhow",
  "crc",
- "indexmap",
+ "indexmap 1.9.2",
  "is-macro",
  "once_cell",
  "parking_lot 0.12.1",
@@ -4756,7 +4845,7 @@ version = "0.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "89c8fc2c12bb1634c7c32fc3c9b6b963ad8f034cc62c4ecddcf215dc4f6f959d"
 dependencies = [
- "indexmap",
+ "indexmap 1.9.2",
  "serde",
  "serde_json",
  "swc_config_macro",
@@ -4878,7 +4967,7 @@ checksum = "6232e641bef05c462bc7da34a3771f9b3f1f3352349ae0cd72b8eee8b0f5d5e0"
 dependencies = [
  "better_scoped_tls",
  "bitflags 2.1.0",
- "indexmap",
+ "indexmap 1.9.2",
  "once_cell",
  "phf",
  "rustc-hash",
@@ -4928,7 +5017,7 @@ checksum = "8d27c12926427f235d149e60f9a9e67a2181fe1eb418c12b53b8e0778c5052a2"
 dependencies = [
  "ahash 0.7.6",
  "dashmap",
- "indexmap",
+ "indexmap 1.9.2",
  "once_cell",
  "petgraph",
  "rustc-hash",
@@ -4974,7 +5063,7 @@ dependencies = [
  "ahash 0.7.6",
  "base64 0.13.1",
  "dashmap",
- "indexmap",
+ "indexmap 1.9.2",
  "once_cell",
  "serde",
  "sha-1",
@@ -5012,7 +5101,7 @@ version = "0.117.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ad791bbfdafcebd878584021e050964c8ab68aba7eeac9d0ee4afba4c284a629"
 dependencies = [
- "indexmap",
+ "indexmap 1.9.2",
  "num_cpus",
  "once_cell",
  "rustc-hash",
@@ -5056,7 +5145,7 @@ version = "0.19.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6291149aec4ba55076fd54a12ceb84cac1f703b2f571c3b2f19aa66ab9ec3009"
 dependencies = [
- "indexmap",
+ "indexmap 1.9.2",
  "petgraph",
  "rustc-hash",
  "swc_common",
@@ -5278,6 +5367,17 @@ dependencies = [
  "syn 2.0.22",
 ]
 
+[[package]]
+name = "time"
+version = "0.1.45"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1b797afad3f312d1c66a56d11d0316f916356d11bd158fbc6ca6389ff6bf805a"
+dependencies = [
+ "libc",
+ "wasi 0.10.0+wasi-snapshot-preview1",
+ "winapi",
+]
+
 [[package]]
 name = "time"
 version = "0.3.20"
@@ -5430,7 +5530,7 @@ version = "0.19.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "dc18466501acd8ac6a3f615dd29a3438f8ca6bb3b19537138b3106e575621274"
 dependencies = [
- "indexmap",
+ "indexmap 1.9.2",
  "toml_datetime",
  "winnow",
 ]
@@ -5551,7 +5651,7 @@ dependencies = [
  "radix_trie",
  "rand",
  "thiserror",
- "time",
+ "time 0.3.20",
  "tokio",
  "tracing",
  "trust-dns-proto",
@@ -5618,7 +5718,7 @@ dependencies = [
  "futures-util",
  "serde",
  "thiserror",
- "time",
+ "time 0.3.20",
  "tokio",
  "toml",
  "tracing",
@@ -5897,6 +5997,12 @@ version = "0.9.0+wasi-snapshot-preview1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cccddf32554fecc6acb585f82a32a72e28b48f8c4c1883ddfeeeaa96f7d8e519"
 
+[[package]]
+name = "wasi"
+version = "0.10.0+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1a143597ca7c7793eff794def352d41792a93c481eb1042423ff7ff72ba2c31f"
+
 [[package]]
 name = "wasi"
 version = "0.11.0+wasi-snapshot-preview1"
@@ -6059,6 +6165,15 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
 
+[[package]]
+name = "windows"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e686886bc078bc1b0b600cac0147aadb815089b6e4da64016cbd754b6342700f"
+dependencies = [
+ "windows-targets 0.48.0",
+]
+
 [[package]]
 name = "windows-sys"
 version = "0.42.0"
@@ -6258,7 +6373,7 @@ dependencies = [
  "oid-registry",
  "rusticata-macros",
  "thiserror",
- "time",
+ "time 0.3.20",
 ]
 
 [[package]]

cli/Cargo.toml

@@ -92,6 +92,7 @@ once_cell.workspace = true
 os_pipe.workspace = true
 percent-encoding.workspace = true
 pin-project.workspace = true
+quick-junit = "^0.3.3"
 rand = { workspace = true, features = ["small_rng"] }
 regex.workspace = true
 ring.workspace = true

cli/args/flags.rs

@@ -221,6 +221,7 @@ pub struct TestFlags {
   pub concurrent_jobs: Option<NonZeroUsize>,
   pub trace_ops: bool,
   pub watch: Option<WatchFlags>,
+  pub junit_path: Option<String>,
 }
 
 #[derive(Clone, Debug, Eq, PartialEq)]
@@ -1848,6 +1849,16 @@ Directory arguments are expanded to all contained files matching the glob
     )
     .arg(no_clear_screen_arg())
     .arg(script_arg().last(true))
+    .arg(
+      Arg::new("junit")
+        .long("junit")
+        .value_name("PATH")
+        .value_hint(ValueHint::FilePath)
+        .help("Write a JUnit XML test report to PATH. Use '-' to write to stdout which is the default when PATH is not provided.")
+        .num_args(0..=1)
+        .require_equals(true)
+        .default_missing_value("-")
+    )
   )
 }
 
@@ -3034,6 +3045,8 @@ fn test_parse(flags: &mut Flags, matches: &mut ArgMatches) {
     Vec::new()
   };
 
+  let junit_path = matches.remove_one::<String>("junit");
+
   flags.subcommand = DenoSubcommand::Test(TestFlags {
     no_run,
     doc,
@@ -3046,6 +3059,7 @@ fn test_parse(flags: &mut Flags, matches: &mut ArgMatches) {
     concurrent_jobs,
     trace_ops,
     watch: watch_arg_parse(matches),
+    junit_path,
   });
 }
 
@@ -5910,6 +5924,7 @@ mod tests {
           trace_ops: true,
           coverage_dir: Some("cov".to_string()),
           watch: Default::default(),
+          junit_path: None,
         }),
         unstable: true,
         no_prompt: true,
@@ -5988,6 +6003,7 @@ mod tests {
           trace_ops: false,
           coverage_dir: None,
           watch: Default::default(),
+          junit_path: None,
         }),
         type_check_mode: TypeCheckMode::Local,
         no_prompt: true,
@@ -6020,6 +6036,7 @@ mod tests {
           trace_ops: false,
           coverage_dir: None,
           watch: Default::default(),
+          junit_path: None,
         }),
         type_check_mode: TypeCheckMode::Local,
         no_prompt: true,
@@ -6056,6 +6073,7 @@ mod tests {
           trace_ops: false,
           coverage_dir: None,
           watch: Default::default(),
+          junit_path: None,
         }),
         no_prompt: true,
         type_check_mode: TypeCheckMode::Local,
@@ -6086,6 +6104,7 @@ mod tests {
           trace_ops: false,
           coverage_dir: None,
           watch: Default::default(),
+          junit_path: None,
         }),
         no_prompt: true,
         type_check_mode: TypeCheckMode::Local,
@@ -6117,6 +6136,7 @@ mod tests {
           watch: Some(WatchFlags {
             no_clear_screen: false,
           }),
+          junit_path: None,
         }),
         no_prompt: true,
         type_check_mode: TypeCheckMode::Local,
@@ -6147,6 +6167,7 @@ mod tests {
           watch: Some(WatchFlags {
             no_clear_screen: false,
           }),
+          junit_path: None,
         }),
         no_prompt: true,
         type_check_mode: TypeCheckMode::Local,
@@ -6179,6 +6200,67 @@ mod tests {
           watch: Some(WatchFlags {
             no_clear_screen: true,
           }),
+          junit_path: None,
+        }),
+        type_check_mode: TypeCheckMode::Local,
+        no_prompt: true,
+        ..Flags::default()
+      }
+    );
+  }
+
+  #[test]
+  fn test_junit_default() {
+    let r = flags_from_vec(svec!["deno", "test", "--junit"]);
+    assert_eq!(
+      r.unwrap(),
+      Flags {
+        subcommand: DenoSubcommand::Test(TestFlags {
+          no_run: false,
+          doc: false,
+          fail_fast: None,
+          filter: None,
+          allow_none: false,
+          shuffle: None,
+          files: FileFlags {
+            include: vec![],
+            ignore: vec![],
+          },
+          concurrent_jobs: None,
+          trace_ops: false,
+          coverage_dir: None,
+          watch: Default::default(),
+          junit_path: Some("-".to_string()),
+        }),
+        type_check_mode: TypeCheckMode::Local,
+        no_prompt: true,
+        ..Flags::default()
+      }
+    );
+  }
+
+  #[test]
+  fn test_junit_with_path() {
+    let r = flags_from_vec(svec!["deno", "test", "--junit=junit.xml"]);
+    assert_eq!(
+      r.unwrap(),
+      Flags {
+        subcommand: DenoSubcommand::Test(TestFlags {
+          no_run: false,
+          doc: false,
+          fail_fast: None,
+          filter: None,
+          allow_none: false,
+          shuffle: None,
+          files: FileFlags {
+            include: vec![],
+            ignore: vec![],
+          },
+          concurrent_jobs: None,
+          trace_ops: false,
+          coverage_dir: None,
+          watch: Default::default(),
+          junit_path: Some("junit.xml".to_string()),
         }),
         type_check_mode: TypeCheckMode::Local,
         no_prompt: true,

cli/args/mod.rs

@@ -227,6 +227,7 @@ pub struct TestOptions {
   pub shuffle: Option<u64>,
   pub concurrent_jobs: NonZeroUsize,
   pub trace_ops: bool,
+  pub junit_path: Option<String>,
 }
 
 impl TestOptions {
@@ -251,6 +252,7 @@ impl TestOptions {
       no_run: test_flags.no_run,
       shuffle: test_flags.shuffle,
       trace_ops: test_flags.trace_ops,
+      junit_path: test_flags.junit_path,
     })
   }
 }

cli/tools/test.rs

@@ -25,6 +25,9 @@ use crate::worker::CliMainWorkerFactory;
 use deno_ast::swc::common::comments::CommentKind;
 use deno_ast::MediaType;
 use deno_ast::SourceRangedForSpanned;
+use deno_core::anyhow;
+use deno_core::anyhow::bail;
+use deno_core::anyhow::Context as _;
 use deno_core::error::generic_error;
 use deno_core::error::AnyError;
 use deno_core::error::JsError;
@@ -346,6 +349,7 @@ struct TestSpecifiersOptions {
   fail_fast: Option<NonZeroUsize>,
   log_level: Option<log::Level>,
   specifier: TestSpecifierOptions,
+  junit_path: Option<String>,
 }
 
 #[derive(Debug, Clone)]
@@ -411,13 +415,158 @@ trait TestReporter {
     tests: &IndexMap<usize, TestDescription>,
     test_steps: &IndexMap<usize, TestStepDescription>,
   );
+  fn flush_report(
+    &mut self,
+    elapsed: &Duration,
+    tests: &IndexMap<usize, TestDescription>,
+    test_steps: &IndexMap<usize, TestStepDescription>,
+  ) -> anyhow::Result<()>;
 }
 
 fn get_test_reporter(options: &TestSpecifiersOptions) -> Box<dyn TestReporter> {
-  Box::new(PrettyTestReporter::new(
+  let pretty = Box::new(PrettyTestReporter::new(
     options.concurrent_jobs.get() > 1,
     options.log_level != Some(Level::Error),
-  ))
+  ));
+  if let Some(junit_path) = &options.junit_path {
+    let junit = Box::new(JunitTestReporter::new(junit_path.clone()));
+    // If junit is writing to stdout, only enable the junit reporter
+    if junit_path == "-" {
+      junit
+    } else {
+      Box::new(CompoundTestReporter::new(vec![pretty, junit]))
+    }
+  } else {
+    pretty
+  }
+}
+
+struct CompoundTestReporter {
+  test_reporters: Vec<Box<dyn TestReporter>>,
+}
+
+impl CompoundTestReporter {
+  fn new(test_reporters: Vec<Box<dyn TestReporter>>) -> Self {
+    Self { test_reporters }
+  }
+}
+
+impl TestReporter for CompoundTestReporter {
+  fn report_register(&mut self, description: &TestDescription) {
+    for reporter in &mut self.test_reporters {
+      reporter.report_register(description);
+    }
+  }
+
+  fn report_plan(&mut self, plan: &TestPlan) {
+    for reporter in &mut self.test_reporters {
+      reporter.report_plan(plan);
+    }
+  }
+
+  fn report_wait(&mut self, description: &TestDescription) {
+    for reporter in &mut self.test_reporters {
+      reporter.report_wait(description);
+    }
+  }
+
+  fn report_output(&mut self, output: &[u8]) {
+    for reporter in &mut self.test_reporters {
+      reporter.report_output(output);
+    }
+  }
+
+  fn report_result(
+    &mut self,
+    description: &TestDescription,
+    result: &TestResult,
+    elapsed: u64,
+  ) {
+    for reporter in &mut self.test_reporters {
+      reporter.report_result(description, result, elapsed);
+    }
+  }
+
+  fn report_uncaught_error(&mut self, origin: &str, error: Box<JsError>) {
+    for reporter in &mut self.test_reporters {
+      reporter.report_uncaught_error(origin, error.clone());
+    }
+  }
+
+  fn report_step_register(&mut self, description: &TestStepDescription) {
+    for reporter in &mut self.test_reporters {
+      reporter.report_step_register(description)
+    }
+  }
+
+  fn report_step_wait(&mut self, description: &TestStepDescription) {
+    for reporter in &mut self.test_reporters {
+      reporter.report_step_wait(description)
+    }
+  }
+
+  fn report_step_result(
+    &mut self,
+    desc: &TestStepDescription,
+    result: &TestStepResult,
+    elapsed: u64,
+    tests: &IndexMap<usize, TestDescription>,
+    test_steps: &IndexMap<usize, TestStepDescription>,
+  ) {
+    for reporter in &mut self.test_reporters {
+      reporter.report_step_result(desc, result, elapsed, tests, test_steps);
+    }
+  }
+
+  fn report_summary(
+    &mut self,
+    elapsed: &Duration,
+    tests: &IndexMap<usize, TestDescription>,
+    test_steps: &IndexMap<usize, TestStepDescription>,
+  ) {
+    for reporter in &mut self.test_reporters {
+      reporter.report_summary(elapsed, tests, test_steps);
+    }
+  }
+
+  fn report_sigint(
+    &mut self,
+    tests_pending: &HashSet<usize>,
+    tests: &IndexMap<usize, TestDescription>,
+    test_steps: &IndexMap<usize, TestStepDescription>,
+  ) {
+    for reporter in &mut self.test_reporters {
+      reporter.report_sigint(tests_pending, tests, test_steps);
+    }
+  }
+
+  fn flush_report(
+    &mut self,
+    elapsed: &Duration,
+    tests: &IndexMap<usize, TestDescription>,
+    test_steps: &IndexMap<usize, TestStepDescription>,
+  ) -> anyhow::Result<()> {
+    let mut errors = vec![];
+    for reporter in &mut self.test_reporters {
+      if let Err(err) = reporter.flush_report(elapsed, tests, test_steps) {
+        errors.push(err)
+      }
+    }
+
+    if errors.is_empty() {
+      Ok(())
+    } else {
+      bail!(
+        "error in one or more wrapped reporters:\n{}",
+        errors
+          .iter()
+          .enumerate()
+          .fold(String::new(), |acc, (i, err)| {
+            format!("{}Error #{}: {:?}\n", acc, i + 1, err)
+          })
+      )
+    }
+  }
 }
 
 struct PrettyTestReporter {
@@ -965,6 +1114,206 @@ impl TestReporter for PrettyTestReporter {
     println!();
     self.in_new_line = true;
   }
+
+  fn flush_report(
+    &mut self,
+    _elapsed: &Duration,
+    _tests: &IndexMap<usize, TestDescription>,
+    _test_steps: &IndexMap<usize, TestStepDescription>,
+  ) -> anyhow::Result<()> {
+    Ok(())
+  }
+}
+
+struct JunitTestReporter {
+  path: String,
+  // Stores TestCases (i.e. Tests) by the Test ID
+  cases: IndexMap<usize, quick_junit::TestCase>,
+}
+
+impl JunitTestReporter {
+  fn new(path: String) -> Self {
+    Self {
+      path,
+      cases: IndexMap::new(),
+    }
+  }
+
+  fn convert_status(status: &TestResult) -> quick_junit::TestCaseStatus {
+    match status {
+      TestResult::Ok => quick_junit::TestCaseStatus::success(),
+      TestResult::Ignored => quick_junit::TestCaseStatus::skipped(),
+      TestResult::Failed(failure) => quick_junit::TestCaseStatus::NonSuccess {
+        kind: quick_junit::NonSuccessKind::Failure,
+        message: Some(failure.to_string()),
+        ty: None,
+        description: None,
+        reruns: vec![],
+      },
+      TestResult::Cancelled => quick_junit::TestCaseStatus::NonSuccess {
+        kind: quick_junit::NonSuccessKind::Error,
+        message: Some("Cancelled".to_string()),
+        ty: None,
+        description: None,
+        reruns: vec![],
+      },
+    }
+  }
+}
+
+impl TestReporter for JunitTestReporter {
+  fn report_register(&mut self, description: &TestDescription) {
+    self.cases.insert(
+      description.id,
+      quick_junit::TestCase::new(
+        description.name.clone(),
+        quick_junit::TestCaseStatus::skipped(),
+      ),
+    );
+  }
+
+  fn report_plan(&mut self, _plan: &TestPlan) {}
+
+  fn report_wait(&mut self, _description: &TestDescription) {}
+
+  fn report_output(&mut self, _output: &[u8]) {
+    /*
+     TODO(skycoop): Right now I can't include stdout/stderr in the report because
+     we have a global pair of output streams that don't differentiate between the
+     output of different tests. This is a nice to have feature, so we can come
+     back to it later
+    */
+  }
+
+  fn report_result(
+    &mut self,
+    description: &TestDescription,
+    result: &TestResult,
+    elapsed: u64,
+  ) {
+    if let Some(case) = self.cases.get_mut(&description.id) {
+      case.status = Self::convert_status(result);
+      case.set_time(Duration::from_millis(elapsed));
+    }
+  }
+
+  fn report_uncaught_error(&mut self, _origin: &str, _error: Box<JsError>) {}
+
+  fn report_step_register(&mut self, _description: &TestStepDescription) {}
+
+  fn report_step_wait(&mut self, _description: &TestStepDescription) {}
+
+  fn report_step_result(
+    &mut self,
+    description: &TestStepDescription,
+    result: &TestStepResult,
+    _elapsed: u64,
+    _tests: &IndexMap<usize, TestDescription>,
+    test_steps: &IndexMap<usize, TestStepDescription>,
+  ) {
+    let status = match result {
+      TestStepResult::Ok => "passed",
+      TestStepResult::Ignored => "skipped",
+      TestStepResult::Failed(_) => "failure",
+    };
+
+    let root_id: usize;
+    let mut name = String::new();
+    {
+      let mut ancestors = vec![];
+      let mut current_desc = description;
+      loop {
+        if let Some(d) = test_steps.get(&current_desc.parent_id) {
+          ancestors.push(&d.name);
+          current_desc = d;
+        } else {
+          root_id = current_desc.parent_id;
+          break;
+        }
+      }
+      ancestors.reverse();
+      for n in ancestors {
+        name.push_str(n);
+        name.push_str(" ... ");
+      }
+      name.push_str(&description.name);
+    }
+
+    if let Some(case) = self.cases.get_mut(&root_id) {
+      case.add_property(quick_junit::Property::new(
+        format!("step[{}]", status),
+        name,
+      ));
+    }
+  }
+
+  fn report_summary(
+    &mut self,
+    _elapsed: &Duration,
+    _tests: &IndexMap<usize, TestDescription>,
+    _test_steps: &IndexMap<usize, TestStepDescription>,
+  ) {
+  }
+
+  fn report_sigint(
+    &mut self,
+    tests_pending: &HashSet<usize>,
+    tests: &IndexMap<usize, TestDescription>,
+    _test_steps: &IndexMap<usize, TestStepDescription>,
+  ) {
+    for id in tests_pending {
+      if let Some(description) = tests.get(id) {
+        self.report_result(description, &TestResult::Cancelled, 0)
+      }
+    }
+  }
+
+  fn flush_report(
+    &mut self,
+    elapsed: &Duration,
+    tests: &IndexMap<usize, TestDescription>,
+    _test_steps: &IndexMap<usize, TestStepDescription>,
+  ) -> anyhow::Result<()> {
+    let mut suites: IndexMap<String, quick_junit::TestSuite> = IndexMap::new();
+    for (id, case) in &self.cases {
+      if let Some(test) = tests.get(id) {
+        suites
+          .entry(test.location.file_name.clone())
+          .and_modify(|s| {
+            s.add_test_case(case.clone());
+          })
+          .or_insert_with(|| {
+            quick_junit::TestSuite::new(test.location.file_name.clone())
+              .add_test_case(case.clone())
+              .to_owned()
+          });
+      }
+    }
+
+    let mut report = quick_junit::Report::new("deno test");
+    report.set_time(*elapsed).add_test_suites(
+      suites
+        .values()
+        .cloned()
+        .collect::<Vec<quick_junit::TestSuite>>(),
+    );
+
+    if self.path == "-" {
+      report
+        .serialize(std::io::stdout())
+        .with_context(|| "Failed to write JUnit report to stdout")?;
+    } else {
+      let file =
+        std::fs::File::create(self.path.clone()).with_context(|| {
+          format!("Failed to open JUnit report file {}", self.path)
+        })?;
+      report.serialize(file).with_context(|| {
+        format!("Failed to write JUnit report to {}", self.path)
+      })?;
+    }
+
+    Ok(())
+  }
 }
 
 fn abbreviate_test_error(js_error: &JsError) -> JsError {
@@ -1547,6 +1896,7 @@ async fn test_specifiers(
           }
 
           TestEvent::Sigint => {
+            let elapsed = Instant::now().duration_since(earlier);
             reporter.report_sigint(
               &tests_started
                 .difference(&tests_with_result)
@@ -1555,6 +1905,11 @@ async fn test_specifiers(
               &tests,
               &test_steps,
             );
+            if let Err(err) =
+              reporter.flush_report(&elapsed, &tests, &test_steps)
+            {
+              eprint!("Test reporter failed to flush: {}", err)
+            }
             std::process::exit(130);
           }
         }
@@ -1565,6 +1920,12 @@ async fn test_specifiers(
 
       let elapsed = Instant::now().duration_since(earlier);
       reporter.report_summary(&elapsed, &tests, &test_steps);
+      if let Err(err) = reporter.flush_report(&elapsed, &tests, &test_steps) {
+        return Err(generic_error(format!(
+          "Test reporter failed to flush: {}",
+          err
+        )));
+      }
 
       if used_only {
         return Err(generic_error(
@@ -1756,6 +2117,7 @@ pub async fn run_tests(
       concurrent_jobs: test_options.concurrent_jobs,
       fail_fast: test_options.fail_fast,
       log_level,
+      junit_path: test_options.junit_path,
       specifier: TestSpecifierOptions {
         filter: TestFilter::from_flag(&test_options.filter),
         shuffle: test_options.shuffle,
@@ -1886,6 +2248,7 @@ pub async fn run_tests_with_watch(
             concurrent_jobs: test_options.concurrent_jobs,
             fail_fast: test_options.fail_fast,
             log_level,
+            junit_path: test_options.junit_path,
             specifier: TestSpecifierOptions {
               filter: TestFilter::from_flag(&test_options.filter),
               shuffle: test_options.shuffle,