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How to unit test a POST method in python?

I have a method that sends a POST containing a JSON to an Elasticsearch instance. I am trying to write a unit test that verify the contents of the sent JSON, but I am not sure how to go about that. Should I create a local server in python and have it verify the contents of the POST or something else? I currently have this:

class TestAnalytics(BaseTest):

def test_post(self):
info = {"test1": "value1", "test2": "value2"}
resp = requests.post(config.tool_repo_urls['es_url'], data=json.dumps(info), headers={'Content-Type': 'application/json'})
assert_equal(resp.status_code, 200) # verify valid response code


2 Answers
2

Creating a local server would be an overkill, what you can do is use unitest library to patch the post() method so it sends the data to your internal assertion method using patch method here is the link https://docs.python.org/3/library/unittest.mock-examples.html. You should look at section 27.6.2. Patch Decorators

post()

Example:

class TestAnalytics(BaseTest):

@patch('requests.post')
def test_post(self,mock_post):
info = {"test1": "value1", "test2": "value2"}
resp = requests.post(config.tool_repo_urls['es_url'], data=json.dumps(info), headers={'Content-Type': 'application/json'})
#Something like assert_equal(mock.assert_called_with,your_Expected_value )


If you want to verify the sent JSON you should try json.loads(), which will throw a ValueError if the input you pass can't be decoded as JSON.

json.loads()

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