simplify test_deny_nodes() logic

tests/test_config.py

@@ -66,17 +66,6 @@
 i like turtles
 """
 
-deny_nodes_config = """
-schema_version: 4.0.1
-
-allow_nodes:
-   - integer
-   - string
-   - float
-deny_nodes:
-   - float
-"""
-
 
 @pytest.fixture
 def patch_rootdir(tmp_path: Path, monkeypatch: Any) -> None:
@@ -296,14 +285,10 @@ def test_get_config_writing(patch_rootdir: None, monkeypatch: pytest.MonkeyPatch
     InvokeAIArgs.did_parse = False
 
 
-def test_deny_nodes(tmp_path: Path, monkeypatch: pytest.MonkeyPatch):
-    # Allow integer, string and float, but explicitly deny float
-    temp_config_file = tmp_path / "invokeai.yaml"
-    temp_config_file.write_text(deny_nodes_config)
-    monkeypatch.setenv("INVOKEAI_ROOT", str(tmp_path))
-
-    get_config.cache_clear()
-    InvokeAIArgs.did_parse = True
+def test_deny_nodes():
+    config = get_config()
+    config.allow_nodes = ["integer", "string", "float"]
+    config.deny_nodes = ["float"]
 
     # confirm invocations union will not have denied nodes
     all_invocations = BaseInvocation.get_invocations()
@@ -315,3 +300,6 @@ def test_deny_nodes(tmp_path: Path, monkeypatch: pytest.MonkeyPatch):
     assert has_integer
     assert has_string
     assert not has_float
+
+    # may not be necessary
+    get_config.cache_clear()