test new code

tests/unit_tests/test_deplete_continue.py

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+"""Unit tests for openmc.deplete continue run capability.
+
+These tests run in two steps: first a normal run and then a continue run based on the prev_results
+"""
+
+import pytest
+
+import openmc.deplete
+
+from tests import dummy_operator
+
+# test that the continue timesteps works when the second integrate call contains all previous timesteps
+@pytest.mark.parametrize("scheme", dummy_operator.SCHEMES)
+def test_continue(run_in_tmpdir, scheme):
+    # set up the problem
+
+    bundle = dummy_operator.SCHEMES[scheme]
+
+    operator = dummy_operator.DummyOperator()
+
+    # take first step
+    bundle.solver(operator, [0.75], 1.0).integrate()
+
+    # restart
+    prev_res = openmc.deplete.Results(
+        operator.output_dir / "depletion_results.h5")
+    operator = dummy_operator.DummyOperator(prev_res)
+
+    # if continue run happens, test passes
+    bundle.solver(operator, [0.75, 0.75], [1.0, 1.0], continue_timesteps = True).integrate()
+
+@pytest.mark.parametrize("scheme", dummy_operator.SCHEMES)
+def test_mismatched_initial_steps(run_in_tmpdir, scheme):
+    """Test to ensure that a continue run with different initial steps is properly caught"""
+
+    # set up the problem
+
+    bundle = dummy_operator.SCHEMES[scheme]
+
+    operator = dummy_operator.DummyOperator()
+
+    # take first step
+    bundle.solver(operator, [0.75, 0.75], [1.0,1.0]).integrate()
+
+    # restart
+    prev_res = openmc.deplete.Results(
+        operator.output_dir / "depletion_results.h5")
+    operator = dummy_operator.DummyOperator(prev_res)
+
+    # continue run with different previous step should cause a ValueError
+    # note the first step matches but the second does not while the third is a new step
+    with pytest.raises(ValueError):
+        bundle.solver(operator, [0.75, 0.5, 0.75], [1.0, 2.0, 1.0], continue_timesteps = True).integrate()