Question

我是python测试的新手。我正在使用pytest并开始学习模拟和补丁。我正在尝试为我的一种方法编写一个测试用例。

helper.py

def validate_json_specifications(path_to_data_folder, json_file_path, json_data) -> None:

    """ Validates the json data with a schema file.
    :param path_to_data_folder: Path to the root folder where all the JSON & schema files are located.
    :param json_file_path: Path to the json file
    :param json_data: Contents of the json file
    :return: None
    """

    schema_file_path = os.path.join(path_to_data_folder, "schema", os.path.basename(json_file_path))
    resolver = RefResolver('file://' + schema_file_path, None)
    with open(schema_file_path) as schema_data:
        try:
            Draft4Validator(json.load(schema_data), resolver=resolver).validate(json_data)
        except ValidationError as e:
            print('ValidationError: Failed to validate {}: {}'.format(os.path.basename(json_file_path), str(e)))
            exit()

我想测试的是：

是否实例化了Draft4Validator类，并使用json_data调用了validate方法？
是否抛出ValidationError并调用退出？

这是我到目前为止编写测试用例的尝试。我决定修补open方法＆amp; Draft4Validator上课。

@patch('builtins.open', mock_open(read_data={}))
@patch('myproject.common.helper.jsonschema', Draft4Validator())
def test_validate_json_specifications(mock_file_open, draft_4_validator_mock):
    validate_json_specifications('foo_path_to_data', 'foo_json_file_path', {})
    mock_file_open.assert_called_with('foo_path_to_data/schema/foo_json_file_path')
    draft_4_validator_mock.assert_called()

我想将一些假数据和路径传递给我的方法，而不是尝试传递真实数据。我收到此错误消息

更新

    @patch('myproject.common.helper.jsonschema', Draft4Validator())
E   TypeError: __init__() missing 1 required positional argument: 'schema'

如何专门针对2种方法Draft4Validator创建补丁，以及如何模拟ValidationError异常？

Answer 1

您正在修补//Get users information $sql = "SELECT user.uid, user.first, user.last, user.email, user.rating FROM user INNER JOIN team_members ON user.uid=team_members.uid WHERE tid = '$tid' ORDER BY user.last ASC"; $result = mysqli_query($conn, $sql); while ($row = mysqli_fetch_assoc($result)) { //name as button(displayed on page load) echo "<button class='player' type='button' data-uid='".$row["uid"]."'> ".$row["first"]." ".$row["last"]."</button><br>"; //hidden information to be shown once button clicked echo "<div class='player_info' style='display:none' data-uid='".$row["uid"]."'> ".$row["email"]." ".$row["rating"]." </div>"; } $(document).ready(function(){ $('button.player').click(function(){ $('div.player_info[data-uid='+$(this).attr('data-uid')+']').toggle(); }); });错误。基本上你正在做的是创建一个没有所需参数的新Draft4Validator对象，并且每次都将它分配给Draft4Validator调用（如果你使用所需的参数创建它）。

在此处详细了解：https://docs.python.org/3/library/unittest.mock-examples.html#patch-decorators

检查有关预期异常的断言检查：http://doc.pytest.org/en/latest/assert.html#assertions-about-expected-exceptions

我想根据你的问题和要求你想要的东西是这样的：

myproject.common.helper.jsonschema

模拟文件打开并抛出异常

1 个答案: