[英]Json dumps while reading file as mock_open
I want to make a simple imitation of reading the file using mock_open
and then to make a simple test that would show me, the mock_open
didn't break anything.我想简单地模仿使用
mock_open
读取文件,然后做一个简单的测试来告诉我, mock_open
没有破坏任何东西。 The problem is that the mock_file
is like this:问题是
mock_file
是这样的:
<MagicMock name='open' spec='builtin_function_or_method' id='140399632712176'>
and as a result I am not able to json.dumps
it, so it would return to the JSON format.结果我无法
json.dumps
它,所以它会返回到 JSON 格式。 The error I get is:我得到的错误是:
TypeError: the JSON object must be str, bytes or bytearray, not builtin_function_or_method
Is there any way to "unmock" the mocked file?有没有办法“取消模拟”模拟文件?
My test code:我的测试代码:
def test_get_all_students_true_148(self):
stub_storage = self.storage
stub_register = self.register
data = mock_open(read_data=json.dumps([
{'id': 1, 'firstName': "User", 'lastName': "Random"},
{'id': 2, 'firstName': "User 2", 'lastName': "Random 2"},
{'id': 3, 'firstName': "User 3 ", 'lastName': "Random 3"}
]))
with patch('builtins.open', data) as mock_file:
data_to_return = json.loads(mock_file)
stub_storage.get_students = MagicMock(return_value=data_to_return)
assert_that(stub_register.get_students(), [
{'id': 1, 'firstName': "User", 'lastName': "Random"},
{'id': 2, 'firstName': "User 2", 'lastName': "Random 2"},
{'id': 3, 'firstName': "User 3 ", 'lastName': "Random 3"}
])
mock_open()
mocks the open()
builtin function. mock_open()
open()
内置 function。
Just as you wouldn't do json.loads(open)
, you can't do json.loads(mock_open())
.就像你不会做
json.loads(open)
一样,你也不能做json.loads(mock_open())
。
On top of that, json.loads()
receives a string and not a file.最重要的是,
json.loads()
接收字符串而不是文件。 For that use json.load()
.为此使用
json.load()
。
Fixed code:固定代码:
from unittest.mock import *
import json
data = mock_open(read_data=json.dumps([
{'id': 1, 'firstName': "User", 'lastName': "Random"},
{'id': 2, 'firstName': "User 2", 'lastName': "Random 2"},
{'id': 3, 'firstName': "User 3 ", 'lastName': "Random 3"}
]))
with patch('builtins.open', data) as new_open:
data_to_return = json.load(new_open())
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