code: def test_Dfs_inputs():
      input_map = dict(
          args=dict(
              argstr="%s",
          ),
          curvatureWeighting=dict(
              argstr="-w %f",
              usedefault=True,
          ),
          environ=dict(
              nohash=True,
              usedefault=True,
          ),
          inputShadingVolume=dict(
              argstr="-c %s",
              extensions=None,
          ),
          inputVolumeFile=dict(
              argstr="-i %s",
              extensions=None,
              mandatory=True,
          ),
          noNormalsFlag=dict(
              argstr="--nonormals",
          ),
          nonZeroTessellation=dict(
              argstr="-nz",
              xor=("nonZeroTessellation", "specialTessellation"),
          ),
          outputSurfaceFile=dict(
              argstr="-o %s",
              extensions=None,
              genfile=True,
          ),
          postSmoothFlag=dict(
              argstr="--postsmooth",
          ),
          scalingPercentile=dict(
              argstr="-f %f",
          ),
          smoothingConstant=dict(
              argstr="-a %f",
              usedefault=True,
          ),
          smoothingIterations=dict(
              argstr="-n %d",
              usedefault=True,
          ),
          specialTessellation=dict(
              argstr="%s",
              position=-1,
              requires=["tessellationThreshold"],
              xor=("nonZeroTessellation", "specialTessellation"),
          ),
          tessellationThreshold=dict(
              argstr="%f",
          ),
          timer=dict(
              argstr="--timer",
          ),
          verbosity=dict(
              argstr="-v %d",
          ),
          zeroPadFlag=dict(
              argstr="-z",
          ),
      )
      inputs = Dfs.input_spec()
  
      for key, metadata in list(input_map.items()):
          for metakey, value in list(metadata.items()):
              assert getattr(inputs.traits()[key], metakey) == value
  
label_desc: Use image node_id 1 for calling a global function with example usage: test_Dfs_inputs() without return types