add bootstrap additive test

rdtools/test/bootstrap_test.py

@@ -1,18 +1,21 @@
 '''Bootstrap module tests.'''
 
+import pytest
+
 from rdtools.bootstrap import _construct_confidence_intervals, \
     _make_time_series_bootstrap_samples
 from rdtools.degradation import degradation_year_on_year
 
 
-def test_bootstrap_module(cods_normalized_daily, cods_normalized_daily_wo_noise):
+@pytest.mark.parametrize("decomposition_type", ["multiplicative", "additive"])
+def test_bootstrap_module(cods_normalized_daily, cods_normalized_daily_wo_noise, decomposition_type):
     ''' Test make time serie bootstrap samples and construct of confidence intervals. '''
     # Test make bootstrap samples
     bootstrap_samples = _make_time_series_bootstrap_samples(cods_normalized_daily,
                                                             cods_normalized_daily_wo_noise,
                                                             sample_nr=10,
                                                             block_length=90,
-                                                            decomposition_type='multiplicative')
+                                                            decomposition_type=decomposition_type)
     # Check if results are as expected
     assert (bootstrap_samples.index == cods_normalized_daily.index).all(), \
         "Index of bootstrapped signals is not as expected"
@@ -30,3 +33,4 @@ def test_bootstrap_module(cods_normalized_daily, cods_normalized_daily_wo_noise)
     assert len(metrics) == 10, "Length of metrics is not as expected"
     for m in metrics:
         assert isinstance(m, float), "Not all metrics are float"
+