Finish test setup for eth_blobBaseFee:

- Add async test
- Add static value for the tester provider for now until support is added to eth-tester.

Author: fselmo

web3/_utils/module_testing/eth_module.py

@@ -1841,6 +1841,12 @@ async def test_async_eth_accounts(self, async_w3: "AsyncWeb3") -> None:
         assert len(accounts) != 0
         assert all(is_checksum_address(account) for account in accounts)
 
+    @pytest.mark.asyncio
+    async def test_async_eth_blob_base_fee(self, async_w3: "AsyncWeb3") -> None:
+        blob_base_fee = await async_w3.eth.blob_base_fee
+        assert is_integer(blob_base_fee)
+        assert blob_base_fee >= 0
+
     @pytest.mark.asyncio
     async def test_async_eth_get_logs_without_logs(
         self, async_w3: "AsyncWeb3", async_block_with_txn_with_log: BlockData

web3/providers/eth_tester/defaults.py

@@ -246,6 +246,7 @@ def create_new_account(eth_tester: "EthereumTester") -> HexAddress:
         "chainId": static_return(131277322940537),  # from fixture generation file
         "feeHistory": call_eth_tester("get_fee_history"),
         "maxPriorityFeePerGas": static_return(10**9),
+        "blobBaseFee": static_return(10**9),
         "gasPrice": static_return(10**9),  # must be >= base fee post-London
         "accounts": call_eth_tester("get_accounts"),
         "blockNumber": compose(