Added test

tests/util/test_insertion_ordered_set.py

@@ -0,0 +1,15 @@
+from decompiler.util.insertion_ordered_set import InsertionOrderedSet
+
+
+def test_insertion_ordered_set_operations():
+    set_1 = InsertionOrderedSet([1, 2])
+    set_2 = InsertionOrderedSet([4, 3])
+    set_3 = InsertionOrderedSet([1, 2, 3, 4, 5])
+    difference = set_3 - set_1
+    intersection = set_1 & set_3
+    symmetric_difference = set_1 ^ set_3
+    union = set_1 | set_2
+    assert isinstance(difference, InsertionOrderedSet) and (difference == InsertionOrderedSet([3, 4, 5]))
+    assert isinstance(intersection, InsertionOrderedSet) and (intersection == InsertionOrderedSet([1, 2]))
+    assert isinstance(symmetric_difference, InsertionOrderedSet) and (symmetric_difference == InsertionOrderedSet([3, 4, 5]))
+    assert isinstance(union, InsertionOrderedSet) and (union == InsertionOrderedSet([1, 2, 4, 3]))