code: def test_input_str(
      metric_naming_scheme: MetricNamingScheme,
  ) -> None:  # noqa: D
      assert (
          metric_naming_scheme.input_str(
              MetricSpec(element_name="example_metric")
          )
          == "example_metric"
      )
  
file_path: metricflow/metricflow/test/naming/test_metric_name_scheme.py
imports: from __future__ import annotations
  from typing import Sequence
  import pytest
  from metricflow.naming.metric_scheme import MetricNamingScheme
  from metricflow.specs.specs import DimensionSpec, InstanceSpec, MetricSpec
label_desc: Use image node_id 2 for calling a global function with example usage: test_input_str(metric_naming_scheme) without return types