code: def test_new_experiment():
      tracker = SQLiteTracker(":memory:")
      assert len(tracker) == 0
  
      tracker.new_experiment()
      assert len(tracker) == 1
  
      tracker.new_experiment()
      assert len(tracker) == 2
  
imports: import json
  from uuid import uuid4
  import time
  import pytest
  from sklearn_evaluation.tracker import SQLiteTracker
  from sklearn_evaluation import tracker
  from sklearn_evaluation import plot
label_desc: Use image node_id 17 for calling a global function with example usage: test_new_experiment() without return types