Add advanced pytest chapter

[RamonRDR]

Summary

• add Phase 9 · Chapter 04, Engineering Automated Tests with pytest, in English, Brazilian Portuguese, and Spanish
• target the current stable pytest 9.1.x series and validate against pytest 9.1.1
• extend requirements-external.txt with pytest>=9.1,<9.2
• cover discovery/collection, assertion introspection, pytest.approx, exceptions, warnings, parametrization, fixtures/scopes/teardown, conftest.py, tmp_path, monkeypatch, test doubles, capsys, capfd, caplog, custom marks, strictness, skip/xfail, test selection, configuration, suite architecture, deterministic isolation, flakiness, coverage boundaries, plugins, unittest interoperability, and CI exit-code contracts
• add five deterministic executable examples that invoke the real pytest runner programmatically without external services or persistent test artifacts
• synchronize Phase 9 navigation, localized status documents, roadmaps, learning paths, project-structure docs, the requests → pytest handoff, and the approved-example manifest
• mark Phase 9: External Libraries complete, with Phase 10: Practical Projects planned next

Chapter shape

• 97 numbered sections per language
• 32 fenced Python blocks, byte-identical across EN / PT-BR / ES
• estimated study time: 300–390 minutes
• five new executable examples:
  • assertions_and_parametrize.py
  • fixtures_and_tmp_path.py
  • monkeypatch_environment.py
  • exceptions_and_warnings.py
  • capture_output_and_logs.py

Dependency contract

• pandas>=3.0,<3.1
• openpyxl>=3.1,<3.2
• requests>=2.34,<2.35
• pytest>=9.1,<9.2
• pytest 9.1.1 requires Python 3.10+
• repository validation continues on Python 3.13

Validation

• branch is based exactly on main at e4eaca97334967bc35e155c2ff491f2f7ba2594e
• final clean HEAD: 2216a19542082d147e3e8e244ef96dab58482889
• one focused commit, 28 changed files
• CPython 3.13.15
• pandas 3.0.5
• openpyxl 3.1.5
• Requests 2.34.2
• pytest 9.1.1
• all 32 fenced Python blocks are identical across EN / PT-BR / ES
• all three chapters contain exactly 97 numbered sections
• all 11 repository quality-script tests passed via unittest
• the same 11 repository tests also passed under pytest
• all 176 approved Python examples passed
• exact output of all five pytest examples passed
• 2,316 internal links across 235 Markdown files passed
• repository structure validation passed
• git diff --check passed
• temporary synchronization script and validation workflow were removed before the clean final commit
• pre-PR validation workflow passed: run 33281547105
• official PR Repository quality checks run #509 passed on the exact final HEAD

Review

• @codex review completed on 2216a19542
• Codex result: Didn't find any major issues
• no inline review threads are open

References

Primary references are the current pytest documentation, how-to guides, API reference, changelog, and PyPI metadata. Version-sensitive pytest 9.1 behavior and the unreleased 9.2 boundary are documented explicitly.

[RamonRDR]

@codex review

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. What shall we delve into next?

Reviewed commit: 2216a19542

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