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bash\nset -euo pipefail\n\nLOG_PREFIX=\"[trend-model-codex-setup]\"\nlog() { printf \"%s %s\\n\" \"$LOG_PREFIX\" \"$*\"; }\nwarn() { printf \"%s [warn] %s\\n\" \"$LOG_PREFIX\" \"$*\" >&2; }\ndie() { printf \"%s [error] %s\\n\" \"$LOG_PREFIX\" \"$*\" >&2; exit 1; }\n\n# -----------------------------\n# Locate Trend_Model_Project repo root robustly.\n# Codex scripts sometimes run from /tmp, so don't rely on $0.\n# -----------------------------\nis_repo_root() {\n local d=\"$1\"\n [[ -f \"${d}/pyproject.toml\" ]] || return 1\n grep -q 'name = \"trend-model\"' \"${d}/pyproject.toml\" 2>/dev/null || return 1\n return 0\n}\n\nREPO_ROOT=\"\"\n\n# Prefer git if available\nif command -v git >/dev/null 2>&1; then\n git_root=\"$(git rev-parse --show-toplevel 2>/dev/null || true)\"\n if [[ -n \"${git_root}\" ]] && is_repo_root \"${git_root}\"; then\n REPO_ROOT=\"${git_root}\"\n fi\nfi\n\n# Walk upwards from PWD\nif [[ -z \"${REPO_ROOT}\" ]]; then\n d=\"${PWD}\"\n while [[ \"${d}\" != \"/\" ]]; do\n if is_repo_root \"${d}\"; then\n REPO_ROOT=\"${d}\"\n break\n fi\n d=\"$(dirname \"${d}\")\"\n done\nfi\n\n# Search common mount points (last resort)\nif [[ -z \"${REPO_ROOT}\" ]]; then\n for base in \"${PWD}\" \"/workspace\" \"/repo\" \"${HOME:-/home}\"; do\n [[ -d \"${base}\" ]] || continue\n while IFS= read -r f; do\n cand=\"$(cd \"$(dirname \"${f}\")\" && pwd)\"\n if is_repo_root \"${cand}\"; then\n REPO_ROOT=\"${cand}\"\n break 2\n fi\n done < <(find \"${base}\" -maxdepth 4 -type f -name pyproject.toml 2>/dev/null | head -n 100)\n done\nfi\n\n[[ -n \"${REPO_ROOT}\" ]] || die \"Could not locate Trend_Model_Project repo root (expected pyproject.toml with name='trend-model').\"\ncd \"${REPO_ROOT}\"\nlog \"Repo root: ${REPO_ROOT}\"\n\n# -----------------------------\n# Node is optional here: only needed for JavaScript workflow tests.\n# -----------------------------\nREQUIRED_NODE_MAJOR=20\nif command -v node >/dev/null 2>&1; then\n NODE_MAJOR=\"$(node -p \"parseInt(process.versions.node.split('.')[0], 10)\" 2>/dev/null || true)\"\n if [[ -n \"${NODE_MAJOR}\" ]] && (( NODE_MAJOR >= REQUIRED_NODE_MAJOR )); then\n log \"Node OK: $(node --version)\"\n else\n warn \"Node found but too old for JS workflow tests (need v${REQUIRED_NODE_MAJOR}+). Found: $(node --version 2>/dev/null || echo unknown)\"\n fi\nelse\n warn \"Node not found. That's fine unless you run JS workflow tests (Node v${REQUIRED_NODE_MAJOR}+).\"\nfi\n\n# -----------------------------\n# Python + venv\n# -----------------------------\nPYTHON_BIN=\"${PYTHON_BIN:-python3}\"\ncommand -v \"${PYTHON_BIN}\" >/dev/null 2>&1 || die \"python3 not found.\"\n\n\"${PYTHON_BIN}\" - <<'PY'\nimport sys\nif sys.version_info < (3, 11):\n raise SystemExit(f\"Python 3.11+ required; found {sys.version.split()[0]}\")\nprint(\"Python OK:\", sys.version.split()[0])\nPY\n\nENV_DIR=\"${ENV_DIR:-.venv}\"\nif [[ ! -d \"${ENV_DIR}\" ]]; then\n log \"Creating venv: ${ENV_DIR}\"\n \"${PYTHON_BIN}\" -m venv \"${ENV_DIR}\"\nfi\n# shellcheck disable=SC1091\nsource \"${ENV_DIR}/bin/activate\"\n\npython -m pip install --upgrade pip setuptools wheel >/dev/null\n\n# -----------------------------\n# Dependency install (lockfile-first, fallback if missing)\n# -----------------------------\nLOCK_FILE=\"${REPO_ROOT}/requirements.lock\"\n\nlog \"Installing uv...\"\npython -m pip install --upgrade uv >/dev/null\n\nif [[ -f \"${LOCK_FILE}\" ]]; then\n log \"Syncing locked dependencies (uv pip sync requirements.lock)...\"\n uv pip sync \"${LOCK_FILE}\"\n\n # Install the project (editable) without re-resolving deps.\n log \"Installing project (editable, no-deps): .[dev,app,notebooks]\"\n python -m pip install --no-deps -e \".[dev,app,notebooks]\"\nelse\n warn \"requirements.lock not found at ${LOCK_FILE}. Falling back to pip resolver (slower / less deterministic).\"\n python -m pip install -e \".[dev,app,notebooks]\"\nfi\n\n# -----------------------------\n# Convenience (best-effort)\n# -----------------------------\nchmod +x scripts/*.sh 2>/dev/null || true\nchmod +x scripts/trend scripts/trend-model 2>/dev/null || true\n\nif command -v pre-commit >/dev/null 2>&1 && [[ -d \".git\" ]]; then\n log \"Installing pre-commit hooks (best-effort)...\"\n pre-commit install --install-hooks >/dev/null 2>&1 || true\nfi\n\n# -----------------------------\n# Fast smoke checks\n# -----------------------------\nlog \"Smoke check: import core modules\"\npython -c \"import trend_analysis, trend_model\" >/dev/null\n\nlog \"Smoke check: CLI entrypoints (help)\"\ntrend-model --help >/dev/null 2>&1 || true\ntrend-analysis --help >/dev/null 2>&1 || true\n\nlog \"Setup complete.\"\nlog \"Useful commands:\"\nlog \" ./scripts/dev_check.sh --changed --fix\"\nlog \" ./scripts/run_tests.sh\"\nlog \" python scripts/generate_demo.py\"\nlog \" PYTHONPATH='./src' python -m trend_analysis.run_analysis -c config/demo.yml\"\nlog \" ./scripts/run_streamlit.sh # run the UI\"\n","mode","on","preset_allowlist","allowlist_domains","pypi.org, github.com, files.pythonhosted.org, deb.debian.org, security.ubuntu.com, raw.githubusercontent.com","allowlist_rules","denylist_domains","safe_methods_only","number",4879,"https://github.com/stranske/Trend_Model_Project/pull/4879","state","closed","merged","mergeable","draft","title","Codex belt for #4875","body","\n> **Source:** Issue #4875\n\n\n\n\n## Automated Status Summary\n#### Scope\nPR #4855 and follow-up PR #4857 addressed issue #4846 (vendor PAEM Plotly viz core into TMP). After two Codex rounds, the verify:compare pipeline flagged the PR with a split verdict (gpt-5.2: CONCERNS @ 72%, claude-sonnet-4-5: PASS @ 92%). While the core implementation is landed and correct, two specific gaps remain from the verifier feedback that were not addressed across either round.\n\n**Chain:** #4846 → PR #4855 (merged) → #4856 → PR #4857 (merged) → this issue\n\n\n## Context for Agent\n\n### Related Issues/PRs\n- [#4855](https://github.com/stranske/Trend_Model_Project/issues/4855)\n- [#4857](https://github.com/stranske/Trend_Model_Project/issues/4857)\n- [#4846](https://github.com/stranske/Trend_Model_Project/issues/4846)\n- [#4856](https://github.com/stranske/Trend_Model_Project/issues/4856)\n\n\n#### Tasks\n- [x] Add test function `test_lazy_attribute_access_no_streamlit_import` in `tests/test_viz_package_import.py` that uses `importlib.import_module` to import `trend_analysis.viz`, accesses `trend_analysis.viz.equity_curve` to trigger `__getattr__`, and asserts `\"streamlit\" not in sys.modules`\n- [x] Add test function `test_validate_quantiles_empty_input` in `tests/viz/test_utils_quantile_bands.py` that calls `validate_quantiles([])` and asserts `pytest.raises(ValueError)`\n- [x] Add test function `test_validate_quantiles_negative_value` in `tests/viz/test_utils_quantile_bands.py` that calls `validate_quantiles([-0.1])` and asserts `pytest.raises(ValueError)`\n- [x] Add test function `test_validate_quantiles_value_above_one` in `tests/viz/test_utils_quantile_bands.py` that calls `validate_quantiles([1.5])` and asserts `pytest.raises(ValueError)`\n- [x] Add test function `test_quantile_bands_duplicate_values` in `tests/viz/test_utils_quantile_bands.py` that calls `quantile_bands([0.5, 0.5])` and asserts `len(result) == 0`\n- [x] Add test function `test_quantile_bands_single_element` in `tests/viz/test_utils_quantile_bands.py` that calls `quantile_bands([0.5])` and asserts `len(result) == 0`\n\n#### Acceptance criteria\n- [x] File `tests/test_viz_package_import.py` contains test function `test_lazy_attribute_access_no_streamlit_import` that accesses `trend_analysis.viz.equity_curve` and asserts `\"streamlit\" not in sys.modules`\n- [x] File `tests/viz/test_utils_quantile_bands.py` contains test function `test_validate_quantiles_empty_input` that asserts `pytest.raises(ValueError)` when calling `validate_quantiles([])`\n- [x] File `tests/viz/test_utils_quantile_bands.py` contains test function `test_validate_quantiles_negative_value` that asserts `pytest.raises(ValueError)` when calling `validate_quantiles([-0.1])`\n- [x] File `tests/viz/test_utils_quantile_bands.py` contains test function `test_validate_quantiles_value_above_one` that asserts `pytest.raises(ValueError)` when calling `validate_quantiles([1.5])`\n- [x] File `tests/viz/test_utils_quantile_bands.py` contains test function `test_quantile_bands_duplicate_values` that asserts `len(quantile_bands([0.5, 0.5])) == 0`\n- [x] File `tests/viz/test_utils_quantile_bands.py` contains test function `test_quantile_bands_single_element` that asserts `len(quantile_bands([0.5])) == 0`\n- [x] Command `pytest tests/test_viz_package_import.py tests/viz/test_utils_quantile_bands.py -v` exits with code 0\n\n","base","head","base_sha","d98e7833cda7ec98d0c69f64302f5f063171089c","head_sha","afba7511e28146649bfcca2fe2c037cdbfa42ce0","head_repo_id","head_repo_full_name","merge_commit_sha","eec0c35c4479e7b79701a388a5a8e977ddeac35e","comments","diff","user",{"_274":275,"_161":275,"_325":-5,"_278":279,"_53":276},"commits",5,"changed_files",4,"additions",154,"deletions",1,"email","events",[],[],"messages",[],{"_104":427,"_108":105,"_373":428},{"_104":359,"_360":361},{"_104":334,"_335":336,"_337":338,"_339":340,"_341":-5},"pr","pr_title","[viz] Add edge-case tests for lazy import and quantile_bands","pr_message","### Motivation\n- Exercise the `trend_analysis.viz` lazy `__getattr__` path so importing the package and accessing a chart attribute does not implicitly import `streamlit`.\n- Cover missing error and degenerate cases in `validate_quantiles` / `quantile_bands` to ensure expected `ValueError` behavior and zero-band results for invalid inputs.\n\n### Description\n- Added `test_lazy_attribute_access_no_streamlit_import` to `tests/test_viz_package_import.py` which imports `trend_analysis.viz`, accesses `viz.equity_curve` to trigger the lazy attribute resolution, and asserts `\"streamlit\" not in sys.modules`, using a minimal `matplotlib` stub in `sys.modules` to allow the path to be exercised in environments without `matplotlib`.\n- Added `test_validate_quantiles_empty_input`, `test_validate_quantiles_negative_value`, and `test_validate_quantiles_value_above_one` to `tests/viz/test_utils_quantile_bands.py` which assert `validate_quantiles` raises `ValueError` for `[]`, `[-0.1]`, and `[1.5]` respectively.\n- Added `test_quantile_bands_duplicate_values` and `test_quantile_bands_single_element` to `tests/viz/test_utils_quantile_bands.py` which assert `quantile_bands([0.5, 0.5])` and `quantile_bands([0.5])` return zero bands.\n\n### Testing\n- Ran `pytest tests/test_viz_package_import.py tests/viz/test_utils_quantile_bands.py -v` and the initial run failed during collection due to missing dependency (`pandas`).\n- After addressing the environment dependency and exercising the lazy path with a `matplotlib` stub, re-ran `pytest tests/test_viz_package_import.py tests/viz/test_utils_quantile_bands.py -v` and all tests passed (`9 passed`).","output_diff",{"_104":339,"_342":343,"_139":140,"_344":-5,"_314":345,"_346":347,"_348":349,"_350":351,"_352":43,"_353":354,"_355":-5},"pre_apply_patch","repo_id","/workspace/Trend_Model_Project","preapply_patch_base_commit_sha","diff --git a/tests/test_viz_package_import.py b/tests/test_viz_package_import.py\nindex 8879d90b7ad5e35b8e954cd17ce3bf29eebb030a..ab752f4b668e0a8c529470ab027dc2bf56d84ffd 100644\n--- a/tests/test_viz_package_import.py\n+++ b/tests/test_viz_package_import.py\n@@ -1,19 +1,37 @@\n \"\"\"Tests for viz package import behavior.\"\"\"\n \n from __future__ import annotations\n \n import importlib\n import sys\n+import types\n \n \n def test_viz_import_does_not_load_streamlit(monkeypatch):\n \"\"\"Importing viz should not pull in Streamlit when it's otherwise absent.\"\"\"\n \n monkeypatch.delitem(sys.modules, \"streamlit\", raising=False)\n # Ensure a fresh import path for the viz module and its chart helper.\n monkeypatch.delitem(sys.modules, \"trend_analysis.viz\", raising=False)\n monkeypatch.delitem(sys.modules, \"trend_analysis.viz.charts\", raising=False)\n \n importlib.import_module(\"trend_analysis.viz\")\n \n assert \"streamlit\" not in sys.modules\n+\n+\n+def test_lazy_attribute_access_no_streamlit_import(monkeypatch):\n+ \"\"\"Accessing lazy-exported chart attributes should not load Streamlit.\"\"\"\n+\n+ monkeypatch.delitem(sys.modules, \"streamlit\", raising=False)\n+ monkeypatch.delitem(sys.modules, \"trend_analysis.viz\", raising=False)\n+ monkeypatch.delitem(sys.modules, \"trend_analysis.viz.charts\", raising=False)\n+ monkeypatch.setitem(sys.modules, \"matplotlib\", types.ModuleType(\"matplotlib\"))\n+ monkeypatch.setitem(\n+ sys.modules, \"matplotlib.pyplot\", types.ModuleType(\"matplotlib.pyplot\")\n+ )\n+\n+ viz = importlib.import_module(\"trend_analysis.viz\")\n+\n+ assert viz.equity_curve is not None\n+ assert \"streamlit\" not in sys.modules\ndiff --git a/tests/viz/test_utils_quantile_bands.py b/tests/viz/test_utils_quantile_bands.py\nindex 333f7377876556a82e06ba3ea3a41fdfe41050b5..be66d9f214f7c54a968d0ab97a44497ecb88d05c 100644\n--- a/tests/viz/test_utils_quantile_bands.py\n+++ b/tests/viz/test_utils_quantile_bands.py\n@@ -1,18 +1,48 @@\n \"\"\"Tests for quantile band pairing behavior.\"\"\"\n \n+import pytest\n+\n from trend_analysis.viz.utils import quantile_bands\n+from trend_analysis.viz.utils import validate_quantiles\n \n \n def test_quantile_bands_even_pairing():\n bands = quantile_bands([0.1, 0.25, 0.75, 0.9])\n \n assert [(band.lower, band.upper) for band in bands] == [\n (0.1, 0.9),\n (0.25, 0.75),\n ]\n \n \n def test_quantile_bands_odd_length():\n bands = quantile_bands([0.05, 0.5, 0.95])\n \n assert [(band.lower, band.upper) for band in bands] == [(0.05, 0.95)]\n+\n+\n+def test_validate_quantiles_empty_input():\n+ with pytest.raises(ValueError):\n+ validate_quantiles([])\n+\n+\n+def test_validate_quantiles_negative_value():\n+ with pytest.raises(ValueError):\n+ validate_quantiles([-0.1])\n+\n+\n+def test_validate_quantiles_value_above_one():\n+ with pytest.raises(ValueError):\n+ validate_quantiles([1.5])\n+\n+\n+def test_quantile_bands_duplicate_values():\n+ result = quantile_bands([0.5, 0.5])\n+\n+ assert len(result) == 0\n+\n+\n+def test_quantile_bands_single_element():\n+ result = quantile_bands([0.5])\n+\n+ assert len(result) == 0\n","external_storage_diff",{"_356":357,"_358":-5},"files_modified",2,"lines_added",48,"lines_removed","commit_message","Add viz lazy import and quantile edge-case tests","additional_parent_commit_shas","file_id","file_00000000513871f7ae64c95d82e8ec40","ttl","partial_repo_snapshot","files",[362,363],{"_364":401,"_366":-5,"_367":402,"_369":-5},{"_364":365,"_366":-5,"_367":368,"_369":-5},"path","tests/viz/test_utils_quantile_bands.py","contents","line_range_contents",[370],"missing_reason",{"_371":324,"_372":351,"_373":374,"_375":70},"line_range_start","line_range_end","content",[376,184,377,184,378,379,184,184,380,381,184,382,383,384,385,184,184,386,387,184,388,184,184,389,390,391,184,184,392,390,393,184,184,394,390,395,184,184,396,397,184,398,184,184,399,400,184,398],"contains_end_of_file","\"\"\"Tests for quantile band pairing behavior.\"\"\"","import pytest","from trend_analysis.viz.utils import quantile_bands","from trend_analysis.viz.utils import validate_quantiles","def test_quantile_bands_even_pairing():"," bands = quantile_bands([0.1, 0.25, 0.75, 0.9])"," assert [(band.lower, band.upper) for band in bands] == ["," (0.1, 0.9),"," (0.25, 0.75),"," ]","def test_quantile_bands_odd_length():"," bands = quantile_bands([0.05, 0.5, 0.95])"," assert [(band.lower, band.upper) for band in bands] == [(0.05, 0.95)]","def test_validate_quantiles_empty_input():"," with pytest.raises(ValueError):"," validate_quantiles([])","def test_validate_quantiles_negative_value():"," validate_quantiles([-0.1])","def test_validate_quantiles_value_above_one():"," validate_quantiles([1.5])","def test_quantile_bands_duplicate_values():"," result = quantile_bands([0.5, 0.5])"," assert len(result) == 0","def test_quantile_bands_single_element():"," result = quantile_bands([0.5])","tests/test_viz_package_import.py",[403],{"_371":324,"_372":404,"_373":405,"_375":70},37,[406,184,407,184,408,409,410,184,184,411,412,184,413,414,415,416,184,417,184,418,184,184,419,420,184,413,415,416,421,422,423,424,184,425,184,426,418],"\"\"\"Tests for viz package import behavior.\"\"\"","from __future__ import annotations","import importlib","import sys","import types","def test_viz_import_does_not_load_streamlit(monkeypatch):"," \"\"\"Importing viz should not pull in Streamlit when it's otherwise absent.\"\"\""," monkeypatch.delitem(sys.modules, \"streamlit\", raising=False)"," # Ensure a fresh import path for the viz module and its chart helper."," monkeypatch.delitem(sys.modules, \"trend_analysis.viz\", raising=False)"," monkeypatch.delitem(sys.modules, \"trend_analysis.viz.charts\", raising=False)"," importlib.import_module(\"trend_analysis.viz\")"," assert \"streamlit\" not in sys.modules","def test_lazy_attribute_access_no_streamlit_import(monkeypatch):"," \"\"\"Accessing lazy-exported chart attributes should not load Streamlit.\"\"\""," monkeypatch.setitem(sys.modules, \"matplotlib\", types.ModuleType(\"matplotlib\"))"," monkeypatch.setitem("," sys.modules, \"matplotlib.pyplot\", types.ModuleType(\"matplotlib.pyplot\")"," )"," viz = importlib.import_module(\"trend_analysis.viz\")"," assert viz.equity_curve is not None","message",[429,430,431,432,433,434,435],{"_436":57,"_57":444},{"_436":438,"_364":401,"_371":443,"_372":404},{"_436":57,"_57":442},{"_436":438,"_364":365,"_371":441,"_372":404},{"_436":57,"_57":440},{"_436":438,"_364":365,"_371":439,"_372":351},{"_436":57,"_57":437},"content_type","\n* Committed these changes on branch `codex/issue-4875` as commit `eb0ca6f`, and created a follow-up PR record with title **`[viz] Add edge-case tests for lazy import and quantile_bands`**.\n\n**Testing**\n* ⚠️ `python - <<'PY' ... urllib.request.urlopen('https://duckduckgo.com/html/?q=pytest%20raises%20ValueError') ... PY` (attempted web search per instruction; blocked by proxy tunnel `403 Forbidden` in this environment).\n* ❌ `pytest tests/test_viz_package_import.py tests/viz/test_utils_quantile_bands.py -v` (initial failure due to missing dependency: `ModuleNotFoundError: No module named 'pandas'`).\n* ✅ `pip install pandas`\n* ❌ `pytest tests/test_viz_package_import.py tests/viz/test_utils_quantile_bands.py -v` (second run failed in lazy-attribute test due to missing `matplotlib`, then test was adjusted to stub `matplotlib` in `sys.modules`).\n* ✅ `pytest tests/test_viz_package_import.py tests/viz/test_utils_quantile_bands.py -v` (final run: 9 passed).","repo_file_citation",39,"\n* Added degenerate `quantile_bands` tests confirming duplicate-only and single-element inputs produce zero bands. ",24,"\n* Added quantile edge-case tests for `validate_quantiles` error paths (empty input, negative value, value > 1). ",23,"### Summary\n* Added `test_lazy_attribute_access_no_streamlit_import` to exercise `trend_analysis.viz.__getattr__` by accessing `viz.equity_curve`, while asserting `streamlit` is still absent from `sys.modules`; also added a lightweight `matplotlib` stub in `sys.modules` so the lazy path can be tested in this environment. ",{"_104":315,"_53":96,"_108":315,"_447":448,"_449":450,"_451":452,"_143":-5,"_130":453},[95],"input_items",[473,474],"external_post_config",{"_454":455,"_247":181,"_456":292,"_258":-5,"_342":241,"_457":18,"_458":-5,"_459":-5,"_460":461,"_462":463,"_464":-5,"_465":-5,"_466":467,"_468":18,"_469":70,"_470":65,"_471":18,"_472":-5},"user_model_slug","slug",1770785969.530391,"installation_id",71148695,"pr_number","enable_internal_github_app_routing","gitlab_service_account_project_id","review_trigger","comment_id",3882134947,"comment_type","issue","pr_write_guard_token","pending_pr_reaction_id","pending_comment_reaction_id",329961321,"comment_if_no_findings","comment_on_error","share_url","is_parallel_review","review_summary_id",{"_104":427,"_108":315,"_373":480},{"_299":300,"_301":475,"_476":477,"_478":140,"_311":-5,"_104":479},"### Source Issue #4875: [Follow-up] Add edge-case tests for viz lazy import and quantile_bands (PR #4857)\n\nSource: https://github.com/stranske/Trend_Model_Project/issues/4875\n\n> # [viz] Add edge-case tests for lazy import and quantile_bands\n> \n> ## Why\n> \n> PR #4855 and follow-up PR #4857 addressed issue #4846 (vendor PAEM Plotly viz core into TMP). After two Codex rounds, the verify:compare pipeline flagged the PR with a split verdict (gpt-5.2: CONCERNS @ 72%, claude-sonnet-4-5: PASS @ 92%). While the core implementation is landed and correct, two specific gaps remain from the verifier feedback that were not addressed across either round.\n> \n> **Chain:** #4846 → PR #4855 (merged) → #4856 → PR #4857 (merged) → this issue\n> \n> ## Scope\n> \n> Address the two remaining gaps identified by the verify:compare pipeline on PR #4857:\n> \n> 1. **Lazy-attribute import test gap**: The `test_viz_package_import.py` test verifies `streamlit not in sys.modules` after `import trend_analysis.viz`, but does not exercise the `__getattr__` lazy-load path that pulls in `.charts`. Add a test that accesses a lazy attribute (e.g., `equity_curve`) and verifies streamlit still has not been imported.\n> \n> 2. **`validate_quantiles` / `quantile_bands` edge-case test gap**: The `test_utils_quantile_bands.py` covers even-pairing and odd-length inputs, but has no tests for error paths (`validate_quantiles` raising `ValueError` on empty or out-of-range) or degenerate inputs (duplicates, single element). Add edge-case tests.\n> \n> ## Non-Goals\n> \n> - Do not change the `viz/__init__.py` lazy-loading implementation — it is correct\n> - Do not change the `quantile_bands` implementation — its behavior is correct\n> - Do not port additional PAEM viz modules\n> - Do not add Streamlit-related functionality\n> \n> ## Tasks\n> \n> - [ ] Add test function `test_lazy_attribute_access_no_streamlit_import` in `tests/test_viz_package_import.py` that uses `importlib.import_module` to import `trend_analysis.viz`, accesses `trend_analysis.viz.equity_curve` to trigger `__getattr__`, and asserts `\"streamlit\" not in sys.modules`\n> - [ ] Add test function `test_validate_quantiles_empty_input` in `tests/viz/test_utils_quantile_bands.py` that calls `validate_quantiles([])` and asserts `pytest.raises(ValueError)`\n> - [ ] Add test function `test_validate_quantiles_negative_value` in `tests/viz/test_utils_quantile_bands.py` that calls `validate_quantiles([-0.1])` and asserts `pytest.raises(ValueError)`\n> - [ ] Add test function `test_validate_quantiles_value_above_one` in `tests/viz/test_utils_quantile_bands.py` that calls `validate_quantiles([1.5])` and asserts `pytest.raises(ValueError)`\n> - [ ] Add test function `test_quantile_bands_duplicate_values` in `tests/viz/test_utils_quantile_bands.py` that calls `quantile_bands([0.5, 0.5])` and asserts `len(result) == 0`\n> - [ ] Add test function `test_quantile_bands_single_element` in `tests/viz/test_utils_quantile_bands.py` that calls `quantile_bands([0.5])` and asserts `len(result) == 0`\n> \n> ## Acceptance Criteria\n> \n> - [ ] File `tests/test_viz_package_import.py` contains test function `test_lazy_attribute_access_no_streamlit_import` that accesses `trend_analysis.viz.equity_curve` and asserts `\"streamlit\" not in sys.modules`\n> - [ ] File `tests/viz/test_utils_quantile_bands.py` contains test function `test_validate_quantiles_empty_input` that asserts `pytest.raises(ValueError)` when calling `validate_quantiles([])`\n> - [ ] File `tests/viz/test_utils_quantile_bands.py` contains test function `test_validate_quantiles_negative_value` that asserts `pytest.raises(ValueError)` when calling `validate_quantiles([-0.1])`\n> - [ ] File `tests/viz/test_utils_quantile_bands.py` contains test function `test_validate_quantiles_value_above_one` that asserts `pytest.raises(ValueError)` when calling `validate_quantiles([1.5])`\n> - [ ] File `tests/viz/test_utils_quantile_bands.py` contains test function `test_quantile_bands_duplicate_values` that asserts `len(quantile_bands([0.5, 0.5])) == 0`\n> - [ ] File `tests/viz/test_utils_quantile_bands.py` contains test function `test_quantile_bands_single_element` that asserts `len(quantile_bands([0.5])) == 0`\n> - [ ] Command `pytest tests/test_viz_package_import.py tests/viz/test_utils_quantile_bands.py -v` exits with code 0\n> \n> ## Implementation Notes\n> \n> ### Files to modify\n> - `tests/test_viz_package_import.py` — add lazy-attribute access test\n> - `tests/viz/test_utils_quantile_bands.py` — add edge-case tests\n> \n> ### Technical guidance\n> \n> The lazy attribute test should follow the existing monkeypatch pattern (clearing `sys.modules` entries and using `importlib.import_module`), then access an attribute to trigger `__getattr__`.\n> \n> `validate_quantiles()` in `src/trend_analysis/viz/utils.py` raises `ValueError` for empty input and out-of-range values. `quantile_bands()` calls `validate_quantiles()` first, then pairs lower/upper; duplicate or single-element inputs produce 0 bands because the `lower >= upper` guard breaks the loop.\n> \n> ### Branch and PR\n> - Branch: `codex/issue-XXXX` \n> - PR title: `[viz] Add edge-case tests for lazy import and quantile_bands`\n> \n> ## Deferred Tasks (Requires Human)\n> \n> None.\n\n—\nPR created automatically to engage Codex.","base_ref","60317a91289e5748b8a4ba4e90edff06591e102d","head_ref","pull_request_info",[481],{"_436":57,"_57":482},"\nCodex Worker activated for branch `codex/issue-4875`.\n\n@codex start\n\nAutomated belt worker prepared this PR. Please continue implementing the requested 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