title: How do you Unit Test Python DataFrames
body: <p>How do i unit test python dataframes? </p>
  
  <p>I have functions that have an input and output as dataframes. Almost every function I have does this. Now if i want to unit test this what is the best method of doing it? It seems a bit of an effort to create a new dataframe (with values populated) for every function?  </p>
  
  <p>Are there any materials you can refer me to? Should you write unit tests for these functions? </p>