Add test for array_equal_with_nan

Signed-off-by: Thijs Baaijen <[email protected]>

Author: Thijss

tests/unit/utils/test_misc.py

@@ -4,7 +4,7 @@
 
 import numpy as np
 
-from power_grid_model_ds._core.utils.misc import is_sequence
+from power_grid_model_ds._core.utils.misc import array_equal_with_nan, is_sequence
 
 # pylint: disable=missing-function-docstring
 
@@ -31,3 +31,9 @@ def test_dict_is_not_a_sequence():
 
 def test_string_is_not_a_sequence():
     assert not is_sequence("abc")
+
+
+def test_array_equal_with_nan():
+    array1 = np.array([(1, 2.0, "a"), (3, np.nan, "b")], dtype=[("col1", "i4"), ("col2", "f4"), ("col3", "U1")])
+    array2 = np.array([(1, 2.0, "a"), (3, np.nan, "b")], dtype=[("col1", "i4"), ("col2", "f4"), ("col3", "U1")])
+    assert array_equal_with_nan(array1, array2)