feat(cli/test): `deno test --clean` (#23519)

The result of the call is ignored as it throws even when the directory
does not exist.

Closes #23491

1 files changed, 6 insertions, 0 deletions

diff --git a/tests/specs/test/clean_flag/sum_test.js b/tests/specs/test/clean_flag/sum_test.js
new file mode 100644
index 000000000..3443fcbd3
--- /dev/null
+++ b/tests/specs/test/clean_flag/sum_test.js
@@ -0,0 +1,6 @@
+import { sum } from "./sum.js";
+import { assertEquals } from "../../../util/std/assert/assert_equals.ts";
+
+Deno.test("sum()", () => {
+  assertEquals(sum(1, 2), 3);
+});