def test_merge_overlapped_objects_second_object_takes_priority():
# Arrange
nested_dict1 = {
"level1prop1": 1,
"level2": {
"level2prop1": 2,
"level3": {
"level3prop1": 3,
}
}
}
nested_dict2 = {
"level1prop1": 4,
"level2": {
"level2prop1": 5,
"level3": {
"level3prop2": 6,
}
}
}
dict_view1 = ObjectDictView(nested_dict1)
dict_view2 = ObjectDictView(nested_dict2)
# Act
dict_view1.merge(dict_view2)
# Assert
assert dict_view1.level1prop1 == 4
assert dict_view1.level2.level2prop1 == 5
assert dict_view1.level2.level3.level3prop1 == 3
assert dict_view1.level2.level3.level3prop2 == 6
def test_merge_two_disjoint_objects_returns_a_union_object():
# Arrange
nested_dict1 = {
"level1prop1": 1,
"level2": {
"level2prop1": 2,
"level3": {
"level3prop1": 3,
}
}
}
nested_dict2 = {
"level1prop2": 4,
"level2": {
"level2prop2": 5,
"level3": {
"level3prop2": 6,
}
}
}
dict_view1 = ObjectDictView(nested_dict1)
dict_view2 = ObjectDictView(nested_dict2)
# Act
dict_view1.merge(dict_view2)
# Assert
assert dict_view1.level1prop1 == 1
assert dict_view1.level1prop2 == 4
assert dict_view1.level2.level2prop1 == 2
assert dict_view1.level2.level2prop2 == 5
assert dict_view1.level2.level3.level3prop1 == 3
assert dict_view1.level2.level3.level3prop2 == 6
def test_get_safe_when_passed_an_existing_key_returns_its_value():
# Arrange
nested_dict = {
"level1prop1": 1,
"level2": {
"level2prop1": 2,
"level3": {
"level3prop1": 3,
}
}
}
dict_view = ObjectDictView(nested_dict)
# Act
value = dict_view.get_safe("level2/level3/level3prop1")
# Assert
assert value == 3
def test_get_safe_when_passed_a_nonexistent_key_returns_default_value():
# Arrange
nested_dict = {
"level1prop1": 1,
"level2": {
"level2prop1": 2,
"level3": {
"level3prop1": 3,
}
}
}
dict_view = ObjectDictView(nested_dict)
# Act
value1 = dict_view.get_safe("level2/level3/level4/level4prop1")
value2 = dict_view.get_safe("level2/level3/level4/level4prop1", default_value=42)
# Assert
assert value1 is None
assert value2 == 42
