docstr: Test motif density localization simulation.
docstr_tok: ["Test","motif","density","localization","simulation","."]
code: def test_motif_density_localization_simulation(self):
      "Test motif density localization simulation." ""
      params = {
          "motif_name": "TAL1_known4",
          "seq_length": 1000,
          "center_size": 150,
          "min_motif_counts": 2,
          "max_motif_counts": 4,
          "num_pos": 30,
          "num_neg": 30,
          "GC_fraction": 0.4,
      }
      (
          sequences,
          y,
          embed,
      ) = dc.molnet.simulate_motif_density_localization(**params)
      assert sequences.shape == (60,)
      assert y.shape == (60, 1)
  
file_path: deepchem/deepchem/molnet/tests/test_dnasim.py
imports: import deepchem
  import unittest
label_desc: Use image node_id 1 for calling the TestDNASim obj's underlying member method code with example usage: obj.test_motif_density_localization_simulation() without return types