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FabledScribe/tests/test_services_design_systems.py
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bvandeusenandClaude Fable 5 bbee0d0db1
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refactor(tests): one definition each for the copied fixtures and fakes (#2825, milestone 296 area 1)
The shape ledger showed the same test scaffolding defined over and over:
_bind_user x12 (byte-identical), _dispose_engine x10 in three wordings,
_no_supersession x3, _make_mock_session x7 in three subsets, a get-or-create
User helper x2 (+3 inlined), and fifteen hand-rolled MagicMock note factories
each re-explaining the same "an auto-MagicMock attribute is truthy" hazard
(note 2109).

Now: conftest.py carries _bind_user / _dispose_engine / _no_supersession as
opt-in fixtures (pytestmark = usefixtures(...) per module, so unit tests pay
nothing), and tests/helpers.py carries make_mock_session(), ensure_user() and
fake_note(**attrs) — the hazard documented once, real values on every
attribute the product reads. Call sites were rewritten by AST so titles with
dashes and commas survived; the three SimpleNamespace _note stand-ins that
only feed a single function stay local.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
2026-08-21 11:03:48 -04:00

406 lines
18 KiB
Python

"""ACL gating and field handling for services/design_systems.py (unit, mocked).
Mirrors tests/test_services_systems.py — same mocked-session shape, because the
question is the same one: does the service refuse before it touches a row?
"""
from unittest.mock import AsyncMock, MagicMock, patch
import pytest
from scribe.services.design_systems import DesignSystemCycle
from tests.helpers import make_mock_session
# --- creating ---------------------------------------------------------------
@pytest.mark.asyncio
async def test_create_with_a_parent_is_denied_without_write_on_that_parent():
"""Parenting to someone else's system would let their delete or re-parent
silently restyle your app, so the chain may only be built from systems you
can write — which, per the ACL, means ones you own."""
with patch("scribe.services.design_systems.access") as acc:
acc.can_write_design_system = AsyncMock(return_value=False)
from scribe.services.design_systems import create_design_system
result = await create_design_system(user_id=1, title="Scribe", parent_id=7)
assert result is None
@pytest.mark.asyncio
async def test_create_without_a_parent_never_consults_the_parent_acl():
"""A family system has no parent, and creating one must not be gated on a
permission check for a system that does not exist."""
mock_session = make_mock_session()
captured = {}
mock_session.add = MagicMock(
side_effect=lambda obj: captured.update(
title=obj.title, parent_id=obj.parent_id
)
)
with patch("scribe.services.design_systems.async_session") as mock_cls, \
patch("scribe.services.design_systems.access") as acc:
acc.can_write_design_system = AsyncMock(return_value=False)
mock_cls.return_value = mock_session
from scribe.services.design_systems import create_design_system
await create_design_system(user_id=1, title=" FabledSword ")
assert captured["title"] == "FabledSword" # stripped
assert captured["parent_id"] is None
acc.can_write_design_system.assert_not_awaited()
# --- the cycle guard, through the service -----------------------------------
@pytest.mark.asyncio
async def test_reparenting_into_a_loop_raises_rather_than_returning_none():
"""None already means "not found, or not yours". A caller that conflated the
two would report "no such design system" for what is really "that parent is
one of its own descendants", so the cycle gets its own exception type."""
mock_session = make_mock_session()
mock_session.get = AsyncMock(return_value=MagicMock(deleted_at=None, parent_id=None))
with patch("scribe.services.design_systems.async_session") as mock_cls, \
patch("scribe.services.design_systems.access") as acc, \
patch("scribe.services.design_systems._parent_map",
AsyncMock(return_value={1: None, 2: 1})):
acc.can_write_design_system = AsyncMock(return_value=True)
mock_cls.return_value = mock_session
from scribe.services.design_systems import update_design_system
with pytest.raises(DesignSystemCycle):
await update_design_system(user_id=1, design_system_id=1, parent_id=2)
mock_session.commit.assert_not_awaited() # refused BEFORE the write
@pytest.mark.asyncio
async def test_clearing_the_parent_is_allowed_and_is_not_read_as_no_change():
"""`parent_id=None` means "make this a root" — the one field where None is a
value rather than "leave alone", which is why it is handled apart from the
others."""
system = MagicMock(deleted_at=None, parent_id=5)
mock_session = make_mock_session()
mock_session.get = AsyncMock(return_value=system)
with patch("scribe.services.design_systems.async_session") as mock_cls, \
patch("scribe.services.design_systems.access") as acc, \
patch("scribe.services.design_systems._parent_map",
AsyncMock(return_value={1: 5, 5: None})):
acc.can_write_design_system = AsyncMock(return_value=True)
mock_cls.return_value = mock_session
from scribe.services.design_systems import update_design_system
await update_design_system(user_id=1, design_system_id=1, parent_id=None)
assert system.parent_id is None
# --- tokens -----------------------------------------------------------------
@pytest.mark.asyncio
async def test_create_token_denied_without_write_on_the_system():
with patch("scribe.services.design_systems.access") as acc:
acc.can_write_design_system = AsyncMock(return_value=False)
from scribe.services.design_systems import create_token
result = await create_token(user_id=1, design_system_id=3, name="--fs-obsidian")
assert result is None
@pytest.mark.asyncio
async def test_token_values_default_to_an_empty_map_not_json_null():
"""The column is NOT NULL so that absence has exactly ONE spelling. Passing
None straight through would store JSON null and hand every reader back the
second empty state the schema was shaped to remove."""
mock_session = make_mock_session()
captured = {}
mock_session.add = MagicMock(
side_effect=lambda obj: captured.update(value_by_mode=obj.value_by_mode)
)
with patch("scribe.services.design_systems.async_session") as mock_cls, \
patch("scribe.services.design_systems.access") as acc:
acc.can_write_design_system = AsyncMock(return_value=True)
mock_cls.return_value = mock_session
from scribe.services.design_systems import create_token
await create_token(
user_id=1, design_system_id=3, name="--fs-radius-md", value_by_mode=None
)
assert captured["value_by_mode"] == {}
@pytest.mark.asyncio
async def test_list_tokens_denied_returns_empty():
with patch("scribe.services.design_systems.access") as acc:
acc.can_read_design_system = AsyncMock(return_value=False)
from scribe.services.design_systems import list_tokens
assert await list_tokens(user_id=1, design_system_id=3) == []
# --- the project pointer ----------------------------------------------------
@pytest.mark.asyncio
async def test_pointing_a_project_at_a_system_needs_write_on_the_project():
with patch("scribe.services.design_systems.access") as acc:
acc.can_write_project = AsyncMock(return_value=False)
acc.can_read_design_system = AsyncMock(return_value=True)
from scribe.services.design_systems import set_project_design_system
assert await set_project_design_system(1, project_id=5, design_system_id=3) is False
@pytest.mark.asyncio
async def test_pointing_a_project_needs_only_READ_on_the_system():
"""Consuming a design system is not changing it, so a system reachable
through another project is a legitimate choice here. Requiring write would
make a shared family style unusable by the people it was shared with."""
project = MagicMock(deleted_at=None, design_system_id=None)
mock_session = make_mock_session()
mock_session.get = AsyncMock(return_value=project)
with patch("scribe.services.design_systems.async_session") as mock_cls, \
patch("scribe.services.design_systems.access") as acc:
acc.can_write_project = AsyncMock(return_value=True)
acc.can_read_design_system = AsyncMock(return_value=True)
acc.can_write_design_system = AsyncMock(return_value=False)
mock_cls.return_value = mock_session
from scribe.services.design_systems import set_project_design_system
assert await set_project_design_system(1, project_id=5, design_system_id=3) is True
assert project.design_system_id == 3
@pytest.mark.asyncio
async def test_clearing_a_projects_design_system_skips_the_system_acl():
"""Un-styling a project must not require permission on the system it is
letting go of — including one that has since been deleted."""
project = MagicMock(deleted_at=None, design_system_id=3)
mock_session = make_mock_session()
mock_session.get = AsyncMock(return_value=project)
with patch("scribe.services.design_systems.async_session") as mock_cls, \
patch("scribe.services.design_systems.access") as acc:
acc.can_write_project = AsyncMock(return_value=True)
acc.can_read_design_system = AsyncMock(return_value=False)
mock_cls.return_value = mock_session
from scribe.services.design_systems import set_project_design_system
assert await set_project_design_system(1, project_id=5, design_system_id=None) is True
assert project.design_system_id is None
acc.can_read_design_system.assert_not_awaited()
# --- resolution (step 2) ----------------------------------------------------
@pytest.mark.asyncio
async def test_resolve_denied_returns_none_not_an_empty_set():
"""None and [] mean different things here: "you may not see this" versus
"this chain genuinely holds no tokens". A caller that got [] for a denial
would render an empty design system as though it were real."""
with patch("scribe.services.design_systems.access") as acc:
acc.can_read_design_system = AsyncMock(return_value=False)
from scribe.services.design_systems import resolve_design_system
assert await resolve_design_system(user_id=1, design_system_id=3) is None
@pytest.mark.asyncio
async def test_resolve_scopes_the_hierarchy_to_the_systems_OWNER_not_the_caller():
"""LOAD-BEARING for shared projects. A caller reading through a project
shared with them owns no link in the chain, so a caller-scoped parent map
returns an empty forest and the cascade truncates to one system — a page
that renders with plausible wrong values and no error anywhere.
The ACL already grants read on the whole chain (reachability propagates
upward); this is the loading side keeping that promise.
"""
owner, caller = 42, 7
system = MagicMock(deleted_at=None, owner_user_id=owner)
mock_session = make_mock_session()
mock_session.get = AsyncMock(return_value=system)
mock_session.execute = AsyncMock(
return_value=MagicMock(scalars=MagicMock(return_value=MagicMock(all=lambda: [])))
)
parent_map = AsyncMock(return_value={3: None})
with patch("scribe.services.design_systems.async_session") as mock_cls, \
patch("scribe.services.design_systems._parent_map", parent_map), \
patch("scribe.services.design_systems.access") as acc:
acc.can_read_design_system = AsyncMock(return_value=True)
mock_cls.return_value = mock_session
from scribe.services.design_systems import resolve_design_system
result = await resolve_design_system(user_id=caller, design_system_id=3)
assert result == [] # empty chain, not None
assert parent_map.await_args.args[1] == owner # NOT `caller`
# --- supersedes (step 6's reframe) ------------------------------------------
@pytest.mark.asyncio
async def test_create_token_supersedes_defaults_to_an_empty_list_not_json_null():
"""Same NOT NULL reasoning as value_by_mode: absence gets one spelling."""
mock_session = make_mock_session()
captured = {}
mock_session.add = MagicMock(
side_effect=lambda obj: captured.update(supersedes=obj.supersedes)
)
with patch("scribe.services.design_systems.async_session") as mock_cls, \
patch("scribe.services.design_systems.access") as acc:
acc.can_write_design_system = AsyncMock(return_value=True)
mock_cls.return_value = mock_session
from scribe.services.design_systems import create_token
await create_token(user_id=1, design_system_id=3, name="--fs-x", supersedes=None)
assert captured["supersedes"] == []
@pytest.mark.asyncio
async def test_create_token_records_the_literals_it_replaces():
mock_session = make_mock_session()
captured = {}
mock_session.add = MagicMock(
side_effect=lambda obj: captured.update(supersedes=obj.supersedes)
)
with patch("scribe.services.design_systems.async_session") as mock_cls, \
patch("scribe.services.design_systems.access") as acc:
acc.can_write_design_system = AsyncMock(return_value=True)
mock_cls.return_value = mock_session
from scribe.services.design_systems import create_token
await create_token(
user_id=1, design_system_id=3, name="--fs-text-on-action",
value_by_mode={"base": "#e8e4d8"}, supersedes=["#fff", "#ffffff"],
)
assert captured["supersedes"] == ["#fff", "#ffffff"]
# --- the master sheet -------------------------------------------------------
@pytest.mark.asyncio
async def test_stylesheet_denied_returns_none():
with patch("scribe.services.design_systems.resolve_design_system",
AsyncMock(return_value=None)):
from scribe.services.design_systems import stylesheet_for_system
assert await stylesheet_for_system(1, 3) is None
@pytest.mark.asyncio
async def test_stylesheet_reports_what_the_sheet_cannot_say_for_itself():
"""The CSS alone hides two things a reviewer needs: which tokens are still
valueless, and which values are declared twice. Both ride alongside rather
than being left for the reader to derive from the text."""
from scribe.services.design_cascade import Contribution, ResolvedToken
def _resolved(name, base=None):
return ResolvedToken(
name=name,
contributions=(
{"base": (Contribution(system_id=1, value=base),)} if base else {}
),
group_name=None, purpose=None, rationale=None,
supersedes=(), order_index=0,
)
system = MagicMock()
system.title = "FabledSword"
with patch("scribe.services.design_systems.resolve_design_system",
AsyncMock(return_value=[
_resolved("--fs-moss", "#4a5d3f"),
_resolved("--fs-success", "#4a5d3f"),
_resolved("--fs-radius-sm"),
])), \
patch("scribe.services.design_systems.get_design_system",
AsyncMock(return_value=system)):
from scribe.services.design_systems import stylesheet_for_system
result = await stylesheet_for_system(1, 3)
assert result["token_count"] == 3
assert result["valueless"] == ["--fs-radius-sm"]
assert result["duplicates"] == {"#4a5d3f": ["--fs-moss", "--fs-success"]}
assert "--fs-moss: #4a5d3f;" in result["css"]
assert "FabledSword" in result["css"]
# --- design_context: the delivery side --------------------------------------
def _ctx_token(name: str, group: str | None):
from scribe.services.design_cascade import ResolvedToken
return ResolvedToken(
name=name, contributions={}, group_name=group,
purpose=None, rationale=None, supersedes=(), order_index=0,
)
@pytest.mark.asyncio
async def test_design_context_merges_guidance_ANCESTOR_FIRST():
"""LOAD-BEARING. A child system holds only what it CHANGES, so its own
guidance describes a departure from a house style it never restates. An
agent handed the leaf alone builds against a fragment with no signal that
the rest exists — which is exactly the failure retiring the design rulebook
would otherwise have caused.
"""
family = MagicMock(id=1, deleted_at=None, owner_user_id=42,
description="the house", guidance="Dark-mode-first.")
family.title = "House"
app = MagicMock(id=3, deleted_at=None, owner_user_id=42,
description="one app", guidance="Accent on the wordmark.")
app.title = "App"
mock_session = make_mock_session()
mock_session.get = AsyncMock(return_value=app)
mock_session.execute = AsyncMock(return_value=MagicMock(
scalars=MagicMock(return_value=MagicMock(all=lambda: [app, family]))
))
with patch("scribe.services.design_systems.async_session") as mock_cls, \
patch("scribe.services.design_systems._parent_map",
AsyncMock(return_value={3: 1, 1: None})), \
patch("scribe.services.design_systems.resolve_design_system",
AsyncMock(return_value=[
_ctx_token("--a", "surface"), _ctx_token("--b", "type"),
_ctx_token("--c", "surface"), _ctx_token("--d", None),
])):
mock_cls.return_value = mock_session
from scribe.services.design_systems import design_context
out = await design_context(user_id=42, design_system_id=3)
assert [g["title"] for g in out["guidance"]] == ["House", "App"]
assert out["inherits_from"] == ["House"]
assert out["token_count"] == 4
# Group names deduped and sorted; an ungrouped token contributes nothing.
assert out["token_groups"] == ["surface", "type"]
@pytest.mark.asyncio
async def test_design_context_denied_returns_none():
"""It rides on resolve_design_system's ACL rather than re-deriving one —
a second permission path is a second thing to get wrong."""
with patch("scribe.services.design_systems.resolve_design_system",
AsyncMock(return_value=None)):
from scribe.services.design_systems import design_context
assert await design_context(user_id=1, design_system_id=3) is None
@pytest.mark.asyncio
async def test_design_context_omits_systems_with_no_guidance():
"""A system that overrides one token and says nothing about it should not
contribute an empty section — a heading with nothing under it reads as
missing content rather than as an absence of content."""
family = MagicMock(id=1, deleted_at=None, owner_user_id=42,
description="", guidance="Dark-mode-first.")
family.title = "House"
app = MagicMock(id=3, deleted_at=None, owner_user_id=42,
description="", guidance=" ")
app.title = "App"
mock_session = make_mock_session()
mock_session.get = AsyncMock(return_value=app)
mock_session.execute = AsyncMock(return_value=MagicMock(
scalars=MagicMock(return_value=MagicMock(all=lambda: [app, family]))
))
with patch("scribe.services.design_systems.async_session") as mock_cls, \
patch("scribe.services.design_systems._parent_map",
AsyncMock(return_value={3: 1, 1: None})), \
patch("scribe.services.design_systems.resolve_design_system",
AsyncMock(return_value=[])):
mock_cls.return_value = mock_session
from scribe.services.design_systems import design_context
out = await design_context(user_id=42, design_system_id=3)
assert [g["title"] for g in out["guidance"]] == ["House"]
assert out["token_count"] == 0