rajatsainju2025/code-explainer

Add tests for seq2seq tokenization and causal masking

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#2 opened on Aug 8, 2025

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good first issuehelp wanted

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Description

Write unit tests covering:\n- Seq2seq preprocessing: source/target tokenization, -100 label masking for pad tokens.\n- Causal preprocessing: prompt masking (-100) and padding masking.\nUse tiny configs to avoid large downloads. Ensure tests run in CI.

Contributor guide

Research direction
Read the tokenization code and understand how source/target tokenization and causal masking are implemented. Look for existing test patterns in the repository. Set up a tiny config to avoid large downloads. Write unit tests using pytest or the existing test framework. Ensure tests cover pad token masking with 100 labels. Run tests locally and verify they pass.
Tech stack
python
Domain
backend
Issue type
Test
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.
Fresh
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.
70