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

2 files changed, 28 insertions, 0 deletions

diff --git a/cli/tests/testdata/test/load_unload.out b/cli/tests/testdata/test/load_unload.out
new file mode 100644
index 000000000..b407ce122
--- /dev/null
+++ b/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])
+
diff --git a/cli/tests/testdata/test/load_unload.ts b/cli/tests/testdata/test/load_unload.ts
new file mode 100644
index 000000000..2bd04a676
--- /dev/null
+++ b/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");
+  }
+});