testcontainers / testcontainers/testcontainers-python

TypeError: object.__new__() takes exactly one argument (the type to instantiate)

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#401 21 comments 0 reactions 0 assignees View on GitHub

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Dominant language
Python
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Description

Describe the bug

running testcontainers in a pytest using a with statement I get the following error

@wait_container_is_ready()
def _connect(self) -> MongoClient:
  return MongoClient(self.get_connection_url())

E TypeError: object.new() takes exactly one argument (the type to instantiate)

Just wondering if anyone else has encountered this

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  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reproducing the failure in a pytest using a with statement and the MongoClient call shown in the report. Trace the wait_container_is_ready() decorator and the connection path to determine why object.new() receives the wrong arguments. Done means the reported scenario no longer raises the TypeError and has a regression test.

Written by the indexing model from the issue text.

Assessment

Tech stack
docker, mongodb, python
Domain
databases, testing
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Needs clarification
Newbie friendliness
25/100

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