Files
github-spec-kit/tests/extensions/test_update_agent_context_python_parity.py
Marsel Safin 295eb221e3 feat(extensions): port update-agent-context to Python (#3387)
* feat(extensions): port update-agent-context to Python

Ports the agent-context extension updater to a single Python script,
per #3281 and the check-prerequisites PoC pattern from #3302. The bash
version already ran its core logic through embedded Python heredocs, so
the port lifts that logic into a standalone script. Parity tests run
bash and Python side by side and compare output and resulting
context-file bytes.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* fix(extensions): match bash case-insensitivity on MSYS, test unparseable config gate

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

---------

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
2026-07-08 07:46:29 -05:00

482 lines
16 KiB
Python

"""Parity tests: update_agent_context.py vs update-agent-context.sh/.ps1.
Each test prepares two identical project trees, runs the bash script in one
and the Python port in the other, then compares exit codes, output (with
project roots normalized) and the resulting context-file bytes. PowerShell
tests compare the resulting file content only and are skipped when ``pwsh``
is unavailable.
"""
from __future__ import annotations
import json
import os
import shutil
import subprocess
import sys
import time
from pathlib import Path
import pytest
from tests.extensions.test_extension_agent_context import (
BASH,
EXT_DIR,
POWERSHELL,
_bundled_script_env,
)
PY_SCRIPT = EXT_DIR / "scripts" / "python" / "update_agent_context.py"
BASH_SCRIPT = EXT_DIR / "scripts" / "bash" / "update-agent-context.sh"
PS_SCRIPT = EXT_DIR / "scripts" / "powershell" / "update-agent-context.ps1"
requires_posix_bash = pytest.mark.skipif(
not BASH or os.name == "nt",
reason="POSIX bash required for side-by-side parity runs",
)
def run_bash(project_root: Path, *args: str) -> subprocess.CompletedProcess:
return subprocess.run(
[BASH, str(BASH_SCRIPT), *args],
cwd=project_root,
env=_bundled_script_env(project_root, for_bash=True),
capture_output=True,
text=True,
timeout=30,
)
def run_python(project_root: Path, *args: str) -> subprocess.CompletedProcess:
return subprocess.run(
[sys.executable, str(PY_SCRIPT), *args],
cwd=project_root,
env=_bundled_script_env(project_root),
capture_output=True,
text=True,
timeout=30,
)
def run_powershell(project_root: Path, *args: str) -> subprocess.CompletedProcess:
return subprocess.run(
[
POWERSHELL,
"-NoProfile",
"-ExecutionPolicy",
"Bypass",
"-File",
str(PS_SCRIPT),
*args,
],
cwd=project_root,
env=_bundled_script_env(project_root),
capture_output=True,
text=True,
timeout=30,
)
def normalize(text: str, project_root: Path) -> str:
return text.replace(str(project_root.resolve()), "__ROOT__").replace(
str(project_root), "__ROOT__"
)
def write_config(project_root: Path, **overrides: object) -> None:
"""Write the extension config as JSON (valid YAML, PS-parseable too)."""
cfg: dict = {
"context_file": overrides.get("context_file", ""),
"context_files": overrides.get("context_files", []),
"context_markers": overrides.get(
"context_markers",
{"start": "<!-- SPECKIT START -->", "end": "<!-- SPECKIT END -->"},
),
}
cfg_dir = project_root / ".specify" / "extensions" / "agent-context"
cfg_dir.mkdir(parents=True, exist_ok=True)
(cfg_dir / "agent-context-config.yml").write_text(
json.dumps(cfg), encoding="utf-8"
)
def make_project(root: Path, **config: object) -> Path:
root.mkdir(parents=True, exist_ok=True)
write_config(root, **config)
return root
def add_plan(project_root: Path, feature_dir: str = "specs/001-demo") -> None:
plan = project_root / feature_dir / "plan.md"
plan.parent.mkdir(parents=True, exist_ok=True)
plan.write_text("# plan\n", encoding="utf-8")
(project_root / ".specify").mkdir(parents=True, exist_ok=True)
(project_root / ".specify" / "feature.json").write_text(
json.dumps({"feature_directory": feature_dir}), encoding="utf-8"
)
def twin_projects(tmp_path: Path, **config: object) -> tuple[Path, Path]:
return (
make_project(tmp_path / "proj-a", **config),
make_project(tmp_path / "proj-b", **config),
)
def assert_parity(
bash: subprocess.CompletedProcess,
py: subprocess.CompletedProcess,
repo_a: Path,
repo_b: Path,
) -> None:
assert py.returncode == bash.returncode, py.stderr + bash.stderr
assert normalize(py.stdout, repo_b) == normalize(bash.stdout, repo_a)
assert normalize(py.stderr, repo_b) == normalize(bash.stderr, repo_a)
# ── Fresh file and upsert behavior ───────────────────────────────────────────
@requires_posix_bash
def test_python_creates_fresh_context_file_matching_bash(tmp_path: Path) -> None:
repo_a, repo_b = twin_projects(tmp_path, context_file="AGENTS.md")
add_plan(repo_a)
add_plan(repo_b)
bash = run_bash(repo_a)
py = run_python(repo_b)
assert_parity(bash, py, repo_a, repo_b)
content_a = (repo_a / "AGENTS.md").read_bytes()
content_b = (repo_b / "AGENTS.md").read_bytes()
assert content_a == content_b
assert b"at specs/001-demo/plan.md" in content_b
@requires_posix_bash
def test_python_replaces_existing_section_matching_bash(tmp_path: Path) -> None:
repo_a, repo_b = twin_projects(tmp_path, context_file="AGENTS.md")
existing = (
"# My project\n\n"
"<!-- SPECKIT START -->\nstale section\n<!-- SPECKIT END -->\n"
"\nTrailing prose stays.\n"
)
for repo in (repo_a, repo_b):
add_plan(repo)
(repo / "AGENTS.md").write_text(existing, encoding="utf-8")
bash = run_bash(repo_a)
py = run_python(repo_b)
assert_parity(bash, py, repo_a, repo_b)
content = (repo_b / "AGENTS.md").read_text(encoding="utf-8")
assert content == (repo_a / "AGENTS.md").read_text(encoding="utf-8")
assert "stale section" not in content
assert content.startswith("# My project\n")
assert "Trailing prose stays." in content
@requires_posix_bash
@pytest.mark.parametrize(
"existing",
[
"# Doc\n<!-- SPECKIT START -->\ndangling start\n",
"dangling end\n<!-- SPECKIT END -->\nrest\n",
"no markers at all",
],
ids=["start-only", "end-only", "no-markers-no-newline"],
)
def test_python_handles_partial_markers_matching_bash(
tmp_path: Path, existing: str
) -> None:
repo_a, repo_b = twin_projects(tmp_path, context_file="AGENTS.md")
for repo in (repo_a, repo_b):
add_plan(repo)
(repo / "AGENTS.md").write_text(existing, encoding="utf-8")
bash = run_bash(repo_a)
py = run_python(repo_b)
assert_parity(bash, py, repo_a, repo_b)
assert (repo_a / "AGENTS.md").read_bytes() == (repo_b / "AGENTS.md").read_bytes()
@requires_posix_bash
def test_python_custom_markers_matching_bash(tmp_path: Path) -> None:
markers = {"start": "<!-- CTX BEGIN -->", "end": "<!-- CTX FINISH -->"}
repo_a, repo_b = twin_projects(
tmp_path, context_file="AGENTS.md", context_markers=markers
)
existing = "intro\n<!-- CTX BEGIN -->\nold\n<!-- CTX FINISH -->\noutro\n"
for repo in (repo_a, repo_b):
add_plan(repo)
(repo / "AGENTS.md").write_text(existing, encoding="utf-8")
bash = run_bash(repo_a)
py = run_python(repo_b)
assert_parity(bash, py, repo_a, repo_b)
content = (repo_b / "AGENTS.md").read_text(encoding="utf-8")
assert content == (repo_a / "AGENTS.md").read_text(encoding="utf-8")
assert "<!-- CTX BEGIN -->" in content
assert "old" not in content
@requires_posix_bash
def test_python_multiple_context_files_dedup_matching_bash(tmp_path: Path) -> None:
files = ["AGENTS.md", "docs/CONTEXT.md", "AGENTS.md"]
repo_a, repo_b = twin_projects(tmp_path, context_files=files)
add_plan(repo_a)
add_plan(repo_b)
bash = run_bash(repo_a)
py = run_python(repo_b)
assert_parity(bash, py, repo_a, repo_b)
assert bash.stdout.count("agent-context: updated") == 2
for name in ("AGENTS.md", "docs/CONTEXT.md"):
assert (repo_a / name).read_bytes() == (repo_b / name).read_bytes()
@requires_posix_bash
def test_python_normalizes_crlf_matching_bash(tmp_path: Path) -> None:
repo_a, repo_b = twin_projects(tmp_path, context_file="AGENTS.md")
existing = b"# Doc\r\n\r\n<!-- SPECKIT START -->\r\nold\r\n<!-- SPECKIT END -->\r\ntail\r\n"
for repo in (repo_a, repo_b):
add_plan(repo)
(repo / "AGENTS.md").write_bytes(existing)
bash = run_bash(repo_a)
py = run_python(repo_b)
assert_parity(bash, py, repo_a, repo_b)
content = (repo_b / "AGENTS.md").read_bytes()
assert content == (repo_a / "AGENTS.md").read_bytes()
assert b"\r" not in content
@requires_posix_bash
def test_python_mdc_frontmatter_repair_matching_bash(tmp_path: Path) -> None:
mdc = ".cursor/rules/specify-rules.mdc"
cases = {
"missing": "# Rules\n",
"false-value": "---\ndescription: rules\nalwaysApply: false\n---\n\n# Rules\n",
"no-key": "---\ndescription: rules\n---\n\n# Rules\n",
}
for name, existing in cases.items():
repo_a = make_project(tmp_path / f"a-{name}", context_file=mdc)
repo_b = make_project(tmp_path / f"b-{name}", context_file=mdc)
for repo in (repo_a, repo_b):
add_plan(repo)
target = repo / mdc
target.parent.mkdir(parents=True, exist_ok=True)
target.write_text(existing, encoding="utf-8")
bash = run_bash(repo_a)
py = run_python(repo_b)
assert_parity(bash, py, repo_a, repo_b)
content = (repo_b / mdc).read_text(encoding="utf-8")
assert content == (repo_a / mdc).read_text(encoding="utf-8"), name
assert "alwaysApply: true" in content, name
# ── Plan-path resolution ─────────────────────────────────────────────────────
@requires_posix_bash
def test_python_explicit_plan_argument_matching_bash(tmp_path: Path) -> None:
repo_a, repo_b = twin_projects(tmp_path, context_file="AGENTS.md")
bash = run_bash(repo_a, "specs/009-explicit/plan.md")
py = run_python(repo_b, "specs/009-explicit/plan.md")
assert_parity(bash, py, repo_a, repo_b)
content = (repo_b / "AGENTS.md").read_bytes()
assert content == (repo_a / "AGENTS.md").read_bytes()
assert b"at specs/009-explicit/plan.md" in content
@requires_posix_bash
def test_python_mtime_fallback_matching_bash(tmp_path: Path) -> None:
repo_a, repo_b = twin_projects(tmp_path, context_file="AGENTS.md")
now = time.time()
for repo in (repo_a, repo_b):
for feature, age in (("specs/000-old", 10), ("specs/001-new", 0)):
plan = repo / feature / "plan.md"
plan.parent.mkdir(parents=True, exist_ok=True)
plan.write_text("# plan\n", encoding="utf-8")
os.utime(plan, (now - age, now - age))
bash = run_bash(repo_a)
py = run_python(repo_b)
assert_parity(bash, py, repo_a, repo_b)
content = (repo_b / "AGENTS.md").read_bytes()
assert content == (repo_a / "AGENTS.md").read_bytes()
assert b"at specs/001-new/plan.md" in content
@requires_posix_bash
def test_python_prefers_feature_json_over_mtime_matching_bash(tmp_path: Path) -> None:
repo_a, repo_b = twin_projects(tmp_path, context_file="AGENTS.md")
now = time.time()
for repo in (repo_a, repo_b):
add_plan(repo, "specs/001-active")
stale = repo / "specs" / "000-stale" / "plan.md"
stale.parent.mkdir(parents=True, exist_ok=True)
stale.write_text("# plan\n", encoding="utf-8")
os.utime(repo / "specs" / "001-active" / "plan.md", (now - 10, now - 10))
os.utime(stale, (now, now))
bash = run_bash(repo_a)
py = run_python(repo_b)
assert_parity(bash, py, repo_a, repo_b)
content = (repo_b / "AGENTS.md").read_bytes()
assert content == (repo_a / "AGENTS.md").read_bytes()
assert b"at specs/001-active/plan.md" in content
@requires_posix_bash
def test_python_no_plan_omits_at_line_matching_bash(tmp_path: Path) -> None:
repo_a, repo_b = twin_projects(tmp_path, context_file="AGENTS.md")
bash = run_bash(repo_a)
py = run_python(repo_b)
assert_parity(bash, py, repo_a, repo_b)
content = (repo_b / "AGENTS.md").read_bytes()
assert content == (repo_a / "AGENTS.md").read_bytes()
assert b"\nat " not in content
# ── Config gates and path validation ─────────────────────────────────────────
@requires_posix_bash
def test_python_missing_config_matching_bash(tmp_path: Path) -> None:
repo_a = tmp_path / "proj-a"
repo_b = tmp_path / "proj-b"
repo_a.mkdir()
repo_b.mkdir()
bash = run_bash(repo_a)
py = run_python(repo_b)
assert_parity(bash, py, repo_a, repo_b)
assert py.returncode == 0
assert "not found; nothing to do." in py.stderr
@requires_posix_bash
def test_python_unparseable_config_matching_bash(tmp_path: Path) -> None:
repo_a = tmp_path / "proj-a"
repo_b = tmp_path / "proj-b"
for repo in (repo_a, repo_b):
cfg_dir = repo / ".specify" / "extensions" / "agent-context"
cfg_dir.mkdir(parents=True)
(cfg_dir / "agent-context-config.yml").write_text(
"context_file: [unclosed\n", encoding="utf-8"
)
bash = run_bash(repo_a)
py = run_python(repo_b)
assert_parity(bash, py, repo_a, repo_b)
assert py.returncode == 0
assert "cannot update context." in py.stderr
assert "agent-context: skipping update (see above for details)." in py.stderr
@requires_posix_bash
def test_python_empty_config_matching_bash(tmp_path: Path) -> None:
repo_a, repo_b = twin_projects(tmp_path)
bash = run_bash(repo_a)
py = run_python(repo_b)
assert_parity(bash, py, repo_a, repo_b)
assert py.returncode == 0
assert "context_files/context_file not set" in py.stderr
@requires_posix_bash
def test_python_self_seed_from_init_options_matching_bash(tmp_path: Path) -> None:
repo_a, repo_b = twin_projects(tmp_path)
for repo in (repo_a, repo_b):
add_plan(repo)
(repo / ".specify" / "init-options.json").write_text(
json.dumps({"integration": "claude"}), encoding="utf-8"
)
shutil.copy(
EXT_DIR / "agent-context-defaults.json",
repo
/ ".specify"
/ "extensions"
/ "agent-context"
/ "agent-context-defaults.json",
)
bash = run_bash(repo_a)
py = run_python(repo_b)
assert_parity(bash, py, repo_a, repo_b)
assert (repo_a / "CLAUDE.md").read_bytes() == (repo_b / "CLAUDE.md").read_bytes()
@requires_posix_bash
@pytest.mark.parametrize(
"bad_path",
["/etc/AGENTS.md", "docs\\AGENTS.md", "../outside.md", "nested/../../escape.md"],
ids=["absolute", "backslash", "dotdot", "nested-dotdot"],
)
def test_python_rejects_escaping_paths_matching_bash(
tmp_path: Path, bad_path: str
) -> None:
repo_a, repo_b = twin_projects(tmp_path, context_file=bad_path)
bash = run_bash(repo_a)
py = run_python(repo_b)
assert_parity(bash, py, repo_a, repo_b)
assert py.returncode == 1
assert not (repo_b / "AGENTS.md").exists()
# ── PowerShell parity (content only) ─────────────────────────────────────────
@pytest.mark.skipif(not POWERSHELL, reason="no PowerShell available")
def test_python_fresh_context_file_matches_powershell(tmp_path: Path) -> None:
repo_a = make_project(tmp_path / "proj-ps", context_file="AGENTS.md")
repo_b = make_project(tmp_path / "proj-py", context_file="AGENTS.md")
add_plan(repo_a)
add_plan(repo_b)
ps = run_powershell(repo_a)
py = run_python(repo_b)
assert ps.returncode == py.returncode == 0, ps.stderr + py.stderr
assert (repo_a / "AGENTS.md").read_bytes() == (repo_b / "AGENTS.md").read_bytes()
@pytest.mark.skipif(not POWERSHELL, reason="no PowerShell available")
def test_python_upsert_matches_powershell(tmp_path: Path) -> None:
repo_a = make_project(tmp_path / "proj-ps", context_file="AGENTS.md")
repo_b = make_project(tmp_path / "proj-py", context_file="AGENTS.md")
existing = (
"# My project\n\n"
"<!-- SPECKIT START -->\nstale\n<!-- SPECKIT END -->\n"
"\ntail\n"
)
for repo in (repo_a, repo_b):
add_plan(repo)
(repo / "AGENTS.md").write_text(existing, encoding="utf-8")
ps = run_powershell(repo_a)
py = run_python(repo_b)
assert ps.returncode == py.returncode == 0, ps.stderr + py.stderr
assert (repo_a / "AGENTS.md").read_bytes() == (repo_b / "AGENTS.md").read_bytes()