uber/doubles

Show diff of arguments when they don't match

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#143 opened on Apr 4, 2019

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enhancementhelp wanted

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Description

It would be nice to know why arguments do not match when there's a single allowance, e.g.:

doubles.exceptions.UnallowedMethodCallError: Received unexpected call to '...' on <...>.  The supplied arguments (...) do not match allowance, missing key 'toaster' required in allowance.

Contributor guide

Research direction
Inspect the allowance matching logic and error generation to add argument diff output using Python's difflib.
Tech stack
python
Domain
testing
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
2
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
1-3 hours
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Active
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
PythonGit
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
75