fix(test): dispatch load event before tests are run (#11708)

cli/tests/integration/test_tests.rs

@@ -49,6 +49,12 @@ itest!(fail {
   output: "test/fail.out",
 });
 
+itest!(load_unload {
+  args: "test test/load_unload.ts",
+  exit_code: 0,
+  output: "test/load_unload.out",
+});
+
 itest!(doc {
   args: "test --doc --allow-all test/doc.ts",
   exit_code: 1,

cli/tests/testdata/test/load_unload.out

@@ -0,0 +1,6 @@
+Check [WILDCARD]/test/load_unload.ts
+running 1 test from [WILDCARD]/test/load_unload.ts
+test test ... ok ([WILDCARD])
+
+test result: ok. 1 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out ([WILDCARD])
+

cli/tests/testdata/test/load_unload.ts

@@ -0,0 +1,22 @@
+let interval: number | null = null;
+addEventListener("load", () => {
+  if (interval) {
+    throw new Error("Interval is already set");
+  }
+
+  interval = setInterval(() => {}, 0);
+});
+
+addEventListener("unload", () => {
+  if (!interval) {
+    throw new Error("Interval was not set");
+  }
+
+  clearInterval(interval);
+});
+
+Deno.test("test", () => {
+  if (!interval) {
+    throw new Error("Interval was not set");
+  }
+});

cli/tools/test_runner.rs

@@ -16,7 +16,6 @@ use deno_core::futures::future;
 use deno_core::futures::stream;
 use deno_core::futures::FutureExt;
 use deno_core::futures::StreamExt;
-use deno_core::located_script_name;
 use deno_core::serde_json::json;
 use deno_core::ModuleSpecifier;
 use deno_runtime::permissions::Permissions;
@@ -221,6 +220,8 @@ pub async fn test_specifier(
   test_source
     .push_str("await new Promise(resolve => setTimeout(resolve, 0));\n");
 
+  test_source.push_str("window.dispatchEvent(new Event('load'));\n");
+
   test_source.push_str(&format!(
     "await Deno[Deno.internal].runTests({});\n",
     json!({
@@ -230,6 +231,8 @@ pub async fn test_specifier(
     }),
   ));
 
+  test_source.push_str("window.dispatchEvent(new Event('unload'));\n");
+
   let test_file = File {
     local: test_module.to_file_path().unwrap(),
     maybe_types: None,
@@ -266,20 +269,11 @@ pub async fn test_specifier(
     None
   };
 
-  worker.execute_script(
-    &located_script_name!(),
-    "window.dispatchEvent(new Event('load'))",
-  )?;
-
   worker.execute_module(&test_module).await?;
 
   worker
     .run_event_loop(maybe_coverage_collector.is_none())
     .await?;
-  worker.execute_script(
-    &located_script_name!(),
-    "window.dispatchEvent(new Event('unload'))",
-  )?;
 
   if let Some(coverage_collector) = maybe_coverage_collector.as_mut() {
     worker