feat(tests): add bpo blob reserve price transition tests. (#2035)

Co-authored-by: Mario Vega <[email protected]>

Author: spencer-tb

tests/osaka/eip7918_blob_reserve_price/test_blob_reserve_price_with_bpo.py

@@ -0,0 +1,37 @@
+"""
+abstract:  [EIP-7918: Blob base fee bounded by execution cost](https://eips.ethereum.org/EIPS/eip-7918)
+    Test the blob base fee reserve price mechanism for [EIP-7918: Blob base fee bounded by execution cost](https://eips.ethereum.org/EIPS/eip-7918).
+
+"""  # noqa: E501
+
+import pytest
+
+from ethereum_test_tools import (
+    Alloc,
+    Block,
+    BlockchainTestFiller,
+    Environment,
+)
+
+from .spec import ref_spec_7918
+
+REFERENCE_SPEC_GIT_PATH = ref_spec_7918.git_path
+REFERENCE_SPEC_VERSION = ref_spec_7918.version
+
+
+@pytest.mark.valid_at_transition_to("BPO1")
+@pytest.mark.valid_for_bpo_forks()
+@pytest.mark.parametrize("parent_excess_blobs", [27])
+@pytest.mark.parametrize("block_base_fee_per_gas", [17])
+def test_blob_base_fee_with_bpo_transition(
+    blockchain_test: BlockchainTestFiller,
+    pre: Alloc,
+    env: Environment,
+):
+    """Test BPO1 transition with EIP-7918 reserve mechanism."""
+    blockchain_test(
+        genesis_environment=env,
+        pre=pre,
+        blocks=[Block(timestamp=15_000)],
+        post={},
+    )