5 files changed, 126 insertions, 0 deletions
diff --git a/cli/tests/integration/compile_tests.rs b/cli/tests/integration/compile_tests.rs
index 828e04b1f..810cf5f80 100644
--- a/cli/tests/integration/compile_tests.rs
+++ b/cli/tests/integration/compile_tests.rs
@@ -566,6 +566,91 @@ fn check_local_by_default2() {
 }
 
 #[test]
+fn workers_basic() {
+  let _guard = util::http_server();
+  let dir = TempDir::new();
+  let exe = if cfg!(windows) {
+    dir.path().join("basic.exe")
+  } else {
+    dir.path().join("basic")
+  };
+  let output = util::deno_cmd()
+    .current_dir(util::root_path())
+    .arg("compile")
+    .arg("--no-check")
+    .arg("--output")
+    .arg(&exe)
+    .arg(util::testdata_path().join("./compile/workers/basic.ts"))
+    .output()
+    .unwrap();
+  assert!(output.status.success());
+
+  let output = Command::new(&exe).output().unwrap();
+  assert!(output.status.success());
+  let expected = std::fs::read_to_string(
+    util::testdata_path().join("./compile/workers/basic.out"),
+  )
+  .unwrap();
+  assert_eq!(String::from_utf8(output.stdout).unwrap(), expected);
+}
+
+#[test]
+fn workers_not_in_module_map() {
+  let _guard = util::http_server();
+  let dir = TempDir::new();
+  let exe = if cfg!(windows) {
+    dir.path().join("not_in_module_map.exe")
+  } else {
+    dir.path().join("not_in_module_map")
+  };
+  let output = util::deno_cmd()
+    .current_dir(util::root_path())
+    .arg("compile")
+    .arg("--output")
+    .arg(&exe)
+    .arg(util::testdata_path().join("./compile/workers/not_in_module_map.ts"))
+    .output()
+    .unwrap();
+  assert!(output.status.success());
+
+  let output = Command::new(&exe).env("NO_COLOR", "").output().unwrap();
+  assert!(!output.status.success());
+  let stderr = String::from_utf8(output.stderr).unwrap();
+  assert!(stderr.starts_with(concat!(
+    "error: Uncaught (in worker \"\") Module not found\n",
+    "error: Uncaught (in promise) Error: Unhandled error in child worker.\n"
+  )));
+}
+
+#[test]
+fn workers_with_include_flag() {
+  let _guard = util::http_server();
+  let dir = TempDir::new();
+  let exe = if cfg!(windows) {
+    dir.path().join("workers_with_include_flag.exe")
+  } else {
+    dir.path().join("workers_with_include_flag")
+  };
+  let output = util::deno_cmd()
+    .current_dir(util::root_path())
+    .arg("compile")
+    .arg("--include")
+    .arg(util::testdata_path().join("./compile/workers/worker.ts"))
+    .arg("--output")
+    .arg(&exe)
+    .arg(util::testdata_path().join("./compile/workers/not_in_module_map.ts"))
+    .output()
+    .unwrap();
+  assert!(output.status.success());
+
+  let output = Command::new(&exe).env("NO_COLOR", "").output().unwrap();
+  assert!(output.status.success());
+  let expected_stdout =
+    concat!("Hello from worker!\n", "Received 42\n", "Closing\n");
+  assert_eq!(&String::from_utf8(output.stdout).unwrap(), expected_stdout);
+}
+
+#[test]
 fn dynamic_import() {
   let _guard = util::http_server();
   let dir = TempDir::new();
diff --git a/cli/tests/testdata/compile/workers/basic.out b/cli/tests/testdata/compile/workers/basic.out
new file mode 100644
index 000000000..9cf9aa18f
--- /dev/null
+++ b/cli/tests/testdata/compile/workers/basic.out
@@ -0,0 +1,5 @@
+worker.js imported from main thread
+Starting worker
+Hello from worker!
+Received 42
+Closing
diff --git a/cli/tests/testdata/compile/workers/basic.ts b/cli/tests/testdata/compile/workers/basic.ts
new file mode 100644
index 000000000..8edf58de9
--- /dev/null
+++ b/cli/tests/testdata/compile/workers/basic.ts
@@ -0,0 +1,11 @@
+import "./worker.ts";
+
+console.log("Starting worker");
+const worker = new Worker(
+  new URL("./worker.ts", import.meta.url),
+  { type: "module" },
+);
+
+setTimeout(() => {
+  worker.postMessage(42);
+}, 500);
diff --git a/cli/tests/testdata/compile/workers/not_in_module_map.ts b/cli/tests/testdata/compile/workers/not_in_module_map.ts
new file mode 100644
index 000000000..b43f8cb1f
--- /dev/null
+++ b/cli/tests/testdata/compile/workers/not_in_module_map.ts
@@ -0,0 +1,11 @@
+// This time ./worker.ts is not in the module map, so the worker
+// initialization will fail unless worker.js is passed as a side module.
+
+const worker = new Worker(
+  new URL("./worker.ts", import.meta.url),
+  { type: "module" },
+);
+
+setTimeout(() => {
+  worker.postMessage(42);
+}, 500);
diff --git a/cli/tests/testdata/compile/workers/worker.ts b/cli/tests/testdata/compile/workers/worker.ts
new file mode 100644
index 000000000..a1c357ab1
--- /dev/null
+++ b/cli/tests/testdata/compile/workers/worker.ts
@@ -0,0 +1,14 @@
+/// <reference no-default-lib="true" />
+/// <reference lib="deno.worker" />
+
+if (import.meta.main) {
+  console.log("Hello from worker!");
+
+  addEventListener("message", (evt) => {
+    console.log(`Received ${evt.data}`);
+    console.log("Closing");
+    self.close();
+  });
+} else {
+  console.log("worker.js imported from main thread");
+}