Catch changes to test group (#4802)

# Catch changes to test group

Add test to catch changes to test group.

tests/unit_tests/test_depedencies.py

@@ -1,6 +1,8 @@
 """A unit test meant to catch accidental introduction of non-optional dependencies."""
 from pathlib import Path
+from typing import Any, Dict, Mapping
 
+import pytest
 import toml
 
 HERE = Path(__file__).parent
@@ -8,17 +10,21 @@ HERE = Path(__file__).parent
 PYPROJECT_TOML = HERE / "../../pyproject.toml"
 
 
-def test_required_dependencies() -> None:
+@pytest.fixture()
+def poetry_conf() -> Dict[str, Any]:
+    """Load the pyproject.toml file."""
+    with open(PYPROJECT_TOML) as f:
+        return toml.load(f)["tool"]["poetry"]
+
+
+def test_required_dependencies(poetry_conf: Mapping[str, Any]) -> None:
     """A test that checks if a new non-optional dependency is being introduced.
 
     If this test is triggered, it means that a contributor is trying to introduce a new
     required dependency. This should be avoided in most situations.
     """
-    with open(PYPROJECT_TOML) as f:
-        pyproject = toml.load(f)
-
     # Get the dependencies from the [tool.poetry.dependencies] section
-    dependencies = pyproject["tool"]["poetry"]["dependencies"]
+    dependencies = poetry_conf["dependencies"]
 
     required_dependencies = [
         package_name
@@ -40,3 +46,29 @@ def test_required_dependencies() -> None:
         "requests",
         "tenacity",
     ]
+
+
+def test_test_group_dependencies(poetry_conf: Mapping[str, Any]) -> None:
+    """Check if someone is attempting to add additional test dependencies.
+
+    Only dependencies associated with test running infrastructure should be added
+    to the test group; e.g., pytest, pytest-cov etc.
+
+    Examples of dependencies that should NOT be included: boto3, azure, postgres, etc.
+    """
+
+    test_group_deps = sorted(poetry_conf["group"]["test"]["dependencies"])
+
+    assert test_group_deps == [
+        "duckdb-engine",  # Should be removed
+        "freezegun",
+        "lark",  # Should be removed
+        "pytest",
+        "pytest-asyncio",
+        "pytest-cov",
+        "pytest-dotenv",
+        "pytest-mock",
+        "pytest-socket",
+        "pytest-watcher",
+        "responses",
+    ]