add tests for checking energy and dynamics in the system

micromagnetictests/calculatortests/__init__.py

@@ -9,7 +9,7 @@
 from .energy import TestEnergy
 from .exchange import TestExchange
 from .fixedsubregions import TestFixedSubregions
-from .hysteresisdriver import test_simple_hysteresis_loop
+from .hysteresisdriver import test_check_for_energy, test_simple_hysteresis_loop
 from .info_file import test_info_file
 from .mesh import TestMesh
 from .mindriver import TestMinDriver

micromagnetictests/calculatortests/hysteresisdriver.py

@@ -1,6 +1,7 @@
 import discretisedfield as df
 import micromagneticmodel as mm
 import numpy as np
+import pytest
 
 
 def test_simple_hysteresis_loop(calculator):
@@ -30,3 +31,12 @@ def test_simple_hysteresis_loop(calculator):
     assert system.table.x == "B_hysteresis"
 
     calculator.delete(system)
+
+
+def test_check_for_energy(calculator):
+    system = mm.examples.macrospin()
+    system.energy = 0
+    td = calculator.TimeDriver()
+
+    with pytest.raises(RuntimeError, match="System's energy is not defined"):
+        td.drive(system, t=1e-12, n=1)

micromagnetictests/calculatortests/mindriver.py

@@ -129,3 +129,11 @@ def test_wrong_evolver(self):
             md.drive(system)
 
         self.calculator.delete(system)
+
+    def test_check_for_energy(self):
+        system = mm.examples.macrospin()
+        system.energy = 0
+        td = self.calculator.TimeDriver()
+
+        with pytest.raises(RuntimeError, match="System's energy is not defined"):
+            td.drive(system, t=1e-12, n=1)

micromagnetictests/calculatortests/timedriver.py

@@ -229,3 +229,16 @@ def test_wrong_evolver(self):
             td.drive(system, t=1e-12, n=1)
 
         self.calculator.delete(system)
+
+    def test_check_for_energy_and_dynamics(self):
+        system = mm.examples.macrospin()
+        system.energy = 0
+        td = self.calculator.TimeDriver()
+
+        with pytest.raises(RuntimeError, match="System's energy is not defined"):
+            td.drive(system, t=1e-12, n=1)
+
+        system.dynamics = 0
+
+        with pytest.raises(RuntimeError, match="System's dynamics is not defined"):
+            td.drive(system, t=1e-12, n=1)

micromagnetictests/tests/test_get_tests.py

@@ -3,4 +3,4 @@
 
 def test_get_tests():
     tests = list(mt.get_tests())
-    assert len(tests) == 30
+    assert len(tests) == 31