def test_change_dict_keys_missing_key(self):
"""
Given
- dictionary to be changed
- dictionary with new keys' names
When
- the output dictionary is missing a key to be changed
Then
- change only the keys that exist
"""
new_names_dict = {'old_name_1': 'new_name_1',
'old_name_2': 'new_name_2'}
dict_to_change = {'old_name_2': 'some_value_2'}
changed_dict = change_dict_keys(new_names_dict, dict_to_change)
assert changed_dict['new_name_2']
assert 'new_name_1' not in changed_dict
assert 'old_name_1' not in changed_dict
assert 'old_name_2' not in changed_dict
def test_change_dict_keys_output_is_none(self):
"""
Given
- dictionary to be changed
- dictionary with new keys' names
When
- the output dictionary is None
Then
- raise a TypeError Exception
"""
with pytest.raises(TypeError):
new_names_dict = {'old_name_1': 'new_name_1',
'old_name_2': 'new_name_2'}
dict_to_change = None
changed_dict = change_dict_keys(new_names_dict, dict_to_change)
assert changed_dict['new_name_1']
assert changed_dict['new_name_2']
assert 'old_name_1' not in changed_dict
assert 'old_name_2' not in changed_dict
def test_change_dict_keys_expected_format(self):
"""
Given
- dictionary to be changed
- dictionary with new keys' names
When
- the dictionaries are well formatted
Then
- return the dictionary with the new keys
"""
new_names_dict = {'old_name_1': 'new_name_1',
'old_name_2': 'new_name_2'}
dict_to_change = {'old_name_1': 'some_value_1',
'old_name_2': 'some_value_2'}
changed_dict = change_dict_keys(new_names_dict, dict_to_change)
assert changed_dict['new_name_1']
assert changed_dict['new_name_2']
assert 'old_name_1' not in changed_dict
assert 'old_name_2' not in changed_dict