chore: checkpoint before Python removal

vendor/tokio/tests/time_wasm.rs

@@ -0,0 +1,40 @@
+#![warn(rust_2018_idioms)]
+#![cfg(all(target_arch = "wasm32", not(target_os = "wasi")))]
+
+use wasm_bindgen_test::wasm_bindgen_test;
+
+#[wasm_bindgen_test]
+#[should_panic]
+fn instant_now_panics() {
+    let _ = tokio::time::Instant::now();
+}
+
+#[cfg(all(feature = "rt", not(feature = "time")))]
+#[wasm_bindgen_test]
+fn runtime_without_time_does_not_panic() {
+    let rt = tokio::runtime::Builder::new_current_thread()
+        .build()
+        .unwrap();
+    rt.block_on(async {});
+}
+
+#[cfg(all(feature = "rt", feature = "time"))]
+#[wasm_bindgen_test]
+#[should_panic] // should remove this once time is supported
+fn runtime_with_time_does_not_panic() {
+    let rt = tokio::runtime::Builder::new_current_thread()
+        .build()
+        .unwrap();
+    rt.block_on(async {});
+}
+
+#[cfg(all(feature = "rt", feature = "time"))]
+#[wasm_bindgen_test]
+#[should_panic]
+fn sleep_panics_on_unknown_unknown() {
+    let rt = tokio::runtime::Builder::new_current_thread()
+        .enable_time()
+        .build()
+        .unwrap();
+    rt.block_on(async { tokio::time::sleep(core::time::Duration::from_millis(1)).await });
+}