Add test for suggest_brain_key method

python/tests/base_api/test_suggest_brain_key.py

+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+
+import pytest
+
+if TYPE_CHECKING:
+    from wax.interfaces import IWaxBaseInterface
+
+
+@pytest.mark.describe("Should be able to suggest brain key")
+def test_suggest_brain_key(wax: IWaxBaseInterface) -> None:
+    brain_key_data = wax.suggest_brain_key()
+
+    assert len(brain_key_data.associated_public_key) == 53
+    assert isinstance(brain_key_data.associated_public_key, str)
+
+    assert len(brain_key_data.brain_key.split(" ")) == 16
+    assert isinstance(brain_key_data.brain_key, str)
+
+    assert len(brain_key_data.wif_private_key) == 51
+    assert isinstance(brain_key_data.wif_private_key, str)