def test_calc_debt_to_asset_ratio(self):
balance_sheet_data = {
"Total Liabilities / Total Assets": [0.69, 0.68, 0.67]
}
balance_sheet_index = pd.to_datetime(["2012-01-01", "2012-01-02", "2012-01-03"])
dated_metric = DatedMetric(
pd.Timestamp("2012-01-03"),
balance_sheet=pd.DataFrame(balance_sheet_data, index=balance_sheet_index),
financial_report_preparation_lag=np.timedelta64(1, 'D')
)
debt_ratio = dated_metric.calc_debt_to_asset_ratio()
# because of 1 day financial_report_preparation_lag
self.assertEqual(debt_ratio, 0.68)
