def METHOD_NAME(self):
    for i in range(10):
        job = self.project.open_job(dict(a=i))
        job.doc.b = float(i)
    df = self.project.to_dataframe(sp_prefix="", doc_prefix="")
    assert len(df) == len(self.project)
    assert "a" in df.columns
    assert "b" in df.columns