Allow async ens tests to run (#3675)

* Allow async ens tests to run

* Add newsfragment for #3675

Author: kclowes

newsfragments/3675.internal.rst

@@ -0,0 +1 @@
+AsyncENS tests were xfailing for the wrong reason.

web3/_utils/ens.py

@@ -65,13 +65,21 @@ def address(self, name: str) -> ChecksumAddress:
         return self.registry.get(name, None)
 
 
+class AsyncStaticENS:
+    def __init__(self, name_addr_pairs: Dict[str, ChecksumAddress]) -> None:
+        self.registry = dict(name_addr_pairs)
+
+    async def address(self, name: str) -> ChecksumAddress:
+        return self.registry.get(name, None)
+
+
 @contextmanager
 def ens_addresses(
     w3: Union["Web3", "AsyncWeb3"], name_addr_pairs: Dict[str, ChecksumAddress]
 ) -> Iterator[None]:
     original_ens = w3.ens
     if w3.provider.is_async:
-        w3.ens = cast(AsyncENS, StaticENS(name_addr_pairs))
+        w3.ens = cast(AsyncENS, AsyncStaticENS(name_addr_pairs))
     else:
         w3.ens = cast(ENS, StaticENS(name_addr_pairs))
     yield

web3/_utils/module_testing/eth_module.py

@@ -454,9 +454,6 @@ async def test_async_eth_sign_transaction_hex_fees(
         assert result["tx"]["nonce"] == txn_params["nonce"]
 
     @pytest.mark.asyncio
-    @pytest.mark.xfail(
-        reason="async name_to_address_middleware has not been implemented yet"
-    )
     async def test_async_eth_sign_transaction_ens_names(
         self, async_w3: "AsyncWeb3", async_keyfile_account_address: ChecksumAddress
     ) -> None:
@@ -2086,7 +2083,6 @@ async def test_async_eth_get_storage_at(
         assert bytes(slot_4[:4]) == b"four"
 
     @pytest.mark.asyncio
-    @pytest.mark.xfail
     async def test_async_eth_get_storage_at_ens_name(
         self, async_w3: "AsyncWeb3", async_storage_contract: "AsyncContract"
     ) -> None:
@@ -2238,9 +2234,6 @@ async def test_async_eth_sign(
         assert new_signature != signature
 
     @pytest.mark.asyncio
-    @pytest.mark.xfail(
-        reason="Async middleware to convert ENS names to addresses is missing"
-    )
     async def test_async_eth_sign_ens_names(
         self,
         async_w3: "AsyncWeb3",