new(tests): EIP-2537: Add G2 MSM test for max discount (#1038)

* new(tests): EIP-2537: Max discount G2 MSM test

* docs: changelog

Author: marioevz

docs/CHANGELOG.md

@@ -19,6 +19,7 @@ Test fixtures for use by clients are available for each release on the [Github r
 - ✨ [EIP-7702](https://eips.ethereum.org/EIPS/eip-7702) set code of non-empty-storage account test ([#948](https://github.com/ethereum/execution-spec-tests/pull/948))
 - ✨ [EIP-7702](https://eips.ethereum.org/EIPS/eip-7702) Remove delegation behavior of EXTCODE* ([#984](https://github.com/ethereum/execution-spec-tests/pull/984))
 - ✨ [EIP-7623](https://eips.ethereum.org/EIPS/eip-7623) Increase calldata cost ([#1004](https://github.com/ethereum/execution-spec-tests/pull/1004))
+- ✨ Add test for [EIP-2537](https://eips.ethereum.org/EIPS/eip-2537) which uses the full discount table of G2 MSM ([#1038](https://github.com/ethereum/execution-spec-tests/pull/1038))
 
 ### 🛠️ Framework
 

tests/prague/eip2537_bls_12_381_precompiles/test_bls12_g2msm.py

@@ -20,7 +20,24 @@
 ]
 
 
-@pytest.mark.parametrize("input_data,expected_output", vectors_from_file("multiexp_G2_bls.json"))
+@pytest.mark.parametrize(
+    "input_data,expected_output",
+    vectors_from_file("multiexp_G2_bls.json")
+    + [
+        pytest.param(
+            (Spec.P2 + Scalar(Spec.Q)) * (len(Spec.G2MSM_DISCOUNT_TABLE) - 1),
+            Spec.INF_G2,
+            id="max_discount",
+            marks=pytest.mark.slow,
+        ),
+        pytest.param(
+            (Spec.P2 + Scalar(Spec.Q)) * len(Spec.G2MSM_DISCOUNT_TABLE),
+            Spec.INF_G2,
+            id="max_discount_plus_1",
+            marks=pytest.mark.slow,
+        ),
+    ],
+)
 def test_valid(
     state_test: StateTestFiller,
     pre: Alloc,