Organize test directory structure with logical categorization

[Copilot]

Test Directory Organization - COMPLETE ✅

Problem Statement (Chinese)

test目录下面，test-cpu和test-cuda有很多文件，但是文件没有层次和分类，请帮忙整理一个结构，并把分类依据加到test的readme里方便开发者理解和新加ut。

Translation

The test directory contains many files under test-cpu and test-cuda, but the files lack hierarchy and classification. Organize a structure and add classification criteria to the test README to help developers understand and add new unit tests.

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✅ All Tasks Completed

• Create subdirectory structure in test_cpu
• Move test_cpu files to appropriate subdirectories
• Create subdirectory structure in test_cuda
• Move test_cuda files to appropriate subdirectories
• Update import statements (from ..helpers to ...helpers)
• Fix symlink for test_llmc_integration.py
• Update README.md with categorization guide
• Simplify README and remove STRUCTURE.md
• Add detailed conftest/helpers/fixtures documentation
• Verify all files properly organized

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📁 New Structure

Reorganized 66 test files into 9 logical categories:

test_cpu/ (33 tests) | test_cuda/ (33 tests)

• core/ - Core AutoRound API and quantization workflows
• quantization/ - Quantization techniques (mixed-bit, MXFP, NVFP4)
• export/ - Model serialization (GGUF, AutoGPTQ, AutoRound format)
• backends/ - Inference backends (Torch, Marlin, Triton, ExLlamaV2)
• models/ - Architecture-specific tests (MLLMs, VLMs, MoE, Diffusion)
• integrations/ - Third-party frameworks (vLLM, SGLang, LLMC)
• schemes/ - Quantization scheme selection
• utils/ - Calibration datasets, logging, CLI
• advanced/ - Multi-GPU, FP8 input

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📚 Documentation

README.md - Concise guide with:

• Directory structure overview
• Detailed conftest.py, fixtures.py, helpers.py documentation
• Available fixtures (model paths, dataloaders)
• Helper functions (model_infer, get_tiny_model, etc.)
• Code examples for new tests
• Running tests by category

STRUCTURE.md - Removed per feedback

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✨ Benefits

For Developers:

• Clear, concise documentation
• Detailed shared utilities documentation (conftest, helpers, fixtures)
• Easy to find and use existing fixtures
• Quick onboarding with practical examples

For Contributors:

• Quick understanding of available test utilities
• Clear placement guidelines
• Easy to write new tests using shared fixtures

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🔍 Recent Changes

✅ README simplified and made more concise
✅ STRUCTURE.md removed
✅ Added comprehensive conftest/helpers/fixtures documentation
✅ All fixtures and helper functions documented with examples

Original prompt

test目录下面，test-cpu和test-cuda有很多文件，但是文件没有层次和分类，请帮忙整理一个结构，并把分类依据加到test的readme里方便开发者理解和新加ut。

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✨ Let Copilot coding agent set things up for you — coding agent works faster and does higher quality work when set up for your repo.

[xin3he]

@copilot Readme稍微简洁一些，structure.m不需要。另外在README中丰富一下confest, helper, fixture的内容，方便外部开发者快速上手

[Copilot]

@copilot Readme稍微简洁一些，structure.m不需要。另外在README中丰富一下confest, helper, fixture的内容，方便外部开发者快速上手

Done! Changes made in commit 674e427:

1. ✅ README.md simplified and made more concise (reduced from 211 to 127 lines)
2. ✅ STRUCTURE.md removed
3. ✅ Added comprehensive documentation for conftest.py, fixtures.py, and helpers.py including:
   • Available fixtures (tiny_opt_model_path, tiny_qwen_model_path, dataloader, etc.)
   • Helper functions (get_model_path, get_tiny_model, model_infer, etc.)
   • Practical code examples showing how to use these utilities

The README now provides clear, concise guidance for external developers to quickly understand and use the shared test utilities.

[yiliu30]

Cool! LGTM