code: def test_sharpe_ratio():
      assert sharpe_ratio(0.5, 0.2, 0.02) == 2.4
      assert sharpe_ratio(0.5, 0.22, 0.005) == 2.25
  
file_path: FinQuant/tests/test_quants.py
imports: import pdb
  import numpy
  import pandas
  import pytest
  from finquant.quants import annualised_portfolio_quantities, downside_risk, sharpe_ratio, sortino_ratio, treynor_ratio, value_at_risk, weighted_mean, weighted_std
label_desc: Use image node_id 3 for calling a global function with example usage: test_sharpe_ratio() without return types