Files
odoo-ai/tests/test_expenses_agent.py
Carlos Garcia e6c3d08990 Fix receipt parsing quality and approval endpoint
Receipt quality: replace LLM amount/date extraction with regex.
LLM was hallucinating 2021/2022 dates and returning '198.40 USD' strings.
Amounts now use deterministic regex (Total:/Grand Total:/Amount Due:).
Dates: filename timestamp > OCR regex > today (no LLM date guessing).
LLM only asked for vendor name + product category.

Approval: fix GET /approval/pending 500 by using correct column
name 'started_at' instead of 'created_at' (which does not exist).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
2026-05-20 23:02:11 -04:00

655 lines
25 KiB
Python

"""
ActiveBlue AI — Expenses Agent Unit Tests
==========================================
Suite: test_expenses_agent.py
Module: agent_service/agents/expenses_agent.py
agent_service/tools/receipt_parser.py
addons/activeblue_ai/models/ab_ai_mail.py
Purpose
-------
Verify the core business logic of the expenses agent without requiring
a live Odoo instance, database, or LLM. All external dependencies
(ORM, HTTP, Ollama) are mocked. Tests run in < 1 second.
Run
---
source .venv-test/bin/activate
python -m pytest tests/test_expenses_agent.py -v
Test groups
-----------
TestFindSemanticDuplicate — two-pass duplicate-detection algorithm
test_plan_* — intent keyword → user_confirmed / user_dup_decision
test_act_* — _act() confirmation gate and expense creation
TestParseUpload — receipt_parser ZIP handling and metadata
TestTextToHtml — HTML escaping (skipped without Odoo env)
See tests/TEST_EXPENSES_AGENT.md for full documentation.
"""
from __future__ import annotations
import asyncio
import base64
import io
import zipfile
from unittest.mock import AsyncMock, MagicMock, patch
import pytest
# ---------------------------------------------------------------------------
# _find_semantic_duplicate
# ---------------------------------------------------------------------------
from agent_service.agents.expenses_agent import ExpensesAgent
def _p(vendor='Acme', amount=10.00, date='2026-05-09', time=None):
"""Shorthand for building a parsed-receipt dict."""
return {'vendor': vendor, 'amount': amount, 'date': date, 'time': time, 'product_name': ''}
def _candidate(parsed):
"""Wrap parsed dict as a (receipt, parsed) candidate tuple."""
return ({}, parsed)
class TestFindSemanticDuplicate:
# ------------------------------------------------------------------
# Pass 1: amount-based match
# ------------------------------------------------------------------
def test_exact_match(self):
candidates = [_candidate(_p('Acme', 10.00, '2026-05-09'))]
idx = ExpensesAgent._find_semantic_duplicate(_p('Acme', 10.00, '2026-05-09'), candidates)
assert idx == 0
def test_amount_within_threshold(self):
candidates = [_candidate(_p('Acme', 10.00, '2026-05-09'))]
idx = ExpensesAgent._find_semantic_duplicate(_p('Acme', 10.04, '2026-05-09'), candidates)
assert idx == 0
def test_amount_just_over_threshold(self):
candidates = [_candidate(_p('Acme', 10.00, '2026-05-09'))]
idx = ExpensesAgent._find_semantic_duplicate(_p('Acme', 10.06, '2026-05-09'), candidates)
# Pass 1 should miss; Pass 2 should still catch it (same vendor + date)
assert idx == 0 # caught by Pass 2
def test_different_date_not_duplicate(self):
candidates = [_candidate(_p('Acme', 10.00, '2026-05-09'))]
idx = ExpensesAgent._find_semantic_duplicate(_p('Acme', 10.00, '2026-05-10'), candidates)
assert idx is None
def test_zero_amount_not_deduplicated(self):
"""Zero-amount receipts are too ambiguous — never flagged as dups."""
candidates = [_candidate(_p('Acme', 0.0, '2026-05-09'))]
idx = ExpensesAgent._find_semantic_duplicate(_p('Acme', 0.0, '2026-05-09'), candidates)
assert idx is None
def test_vendor_similarity_above_threshold(self):
candidates = [_candidate(_p('IN-N-OUT HOUSTON', 8.55, '2026-05-09'))]
idx = ExpensesAgent._find_semantic_duplicate(
_p('In-N-Out Houston', 8.55, '2026-05-09'), candidates)
assert idx == 0
def test_vendor_similarity_below_threshold_pass1(self):
"""Completely different vendors with same amount+date → not a dup."""
candidates = [_candidate(_p('McDonald\'s', 8.55, '2026-05-09'))]
idx = ExpensesAgent._find_semantic_duplicate(
_p('Starbucks', 8.55, '2026-05-09'), candidates)
assert idx is None
def test_time_within_window_is_dup(self):
candidates = [_candidate(_p('Acme', 10.00, '2026-05-09', time='14:00'))]
idx = ExpensesAgent._find_semantic_duplicate(
_p('Acme', 10.00, '2026-05-09', time='14:25'), candidates)
assert idx == 0
def test_time_outside_window_not_dup(self):
"""Same vendor/amount/date but >30 min apart → different transactions."""
candidates = [_candidate(_p('Acme', 10.00, '2026-05-09', time='12:00'))]
idx = ExpensesAgent._find_semantic_duplicate(
_p('Acme', 10.00, '2026-05-09', time='14:00'), candidates)
assert idx is None
def test_one_time_missing_does_not_exclude(self):
"""If only one receipt has a time, the time check is skipped."""
candidates = [_candidate(_p('Acme', 10.00, '2026-05-09', time='12:00'))]
idx = ExpensesAgent._find_semantic_duplicate(
_p('Acme', 10.00, '2026-05-09', time=None), candidates)
assert idx == 0
def test_filename_vendor_same_amount_date_is_dup(self):
"""Vendor looks like a filename → treated as dup if amount+date match."""
candidates = [_candidate(_p('20260509_180857.jpg', 10.00, '2026-05-09'))]
idx = ExpensesAgent._find_semantic_duplicate(
_p('20260509_171757.jpg', 10.00, '2026-05-09'), candidates)
assert idx == 0
def test_no_candidates(self):
idx = ExpensesAgent._find_semantic_duplicate(_p(), [])
assert idx is None
def test_returns_correct_index_multiple_candidates(self):
candidates = [
_candidate(_p('Burger King', 5.00, '2026-05-09')),
_candidate(_p('Acme', 10.00, '2026-05-09')),
_candidate(_p('Starbucks', 4.50, '2026-05-08')),
]
idx = ExpensesAgent._find_semantic_duplicate(_p('Acme Corp', 10.00, '2026-05-09'), candidates)
assert idx == 1
# ------------------------------------------------------------------
# Pass 2: OCR amount mismatch (same vendor+date, different amount)
# ------------------------------------------------------------------
def test_pass2_catches_ocr_amount_mismatch(self):
"""The In-N-Out $8.55 vs $15.00 bug: vendor ≥80%, same date, amounts far apart."""
candidates = [_candidate(_p('IN-N-OUT HOUSTON', 8.55, '2026-05-09'))]
idx = ExpensesAgent._find_semantic_duplicate(
_p('In-N-Qut Houston', 15.00, '2026-05-09'), candidates)
assert idx == 0
def test_pass2_requires_high_vendor_similarity(self):
"""Pass 2 threshold is 80% — clearly different vendors should not trigger it."""
# "Starbucks Coffee" vs "McDonalds Burger" share very few characters (~25%)
candidates = [_candidate(_p('Starbucks Coffee', 8.55, '2026-05-09'))]
idx = ExpensesAgent._find_semantic_duplicate(
_p('McDonalds Burger', 15.00, '2026-05-09'), candidates)
assert idx is None
def test_pass2_same_date_required(self):
candidates = [_candidate(_p('IN-N-OUT HOUSTON', 8.55, '2026-05-08'))]
idx = ExpensesAgent._find_semantic_duplicate(
_p('In-N-Out Houston', 15.00, '2026-05-09'), candidates)
assert idx is None
def test_pass2_respects_time_window(self):
"""Even with high vendor similarity, >30 min apart means different visit."""
candidates = [_candidate(_p('IN-N-OUT HOUSTON', 8.55, '2026-05-09', time='12:00'))]
idx = ExpensesAgent._find_semantic_duplicate(
_p('In-N-Out Houston', 15.00, '2026-05-09', time='15:00'), candidates)
assert idx is None
def test_pass2_skips_filename_vendors(self):
"""Pass 2 does not apply when the vendor looks like a filename."""
candidates = [_candidate(_p('20260509_180857.jpg', 8.55, '2026-05-09'))]
idx = ExpensesAgent._find_semantic_duplicate(
_p('20260509_171757.jpg', 15.00, '2026-05-09'), candidates)
# Filenames have different names so similarity will be low;
# Pass 2 explicitly skips filename vendors.
assert idx is None
def test_pass2_zero_amount_not_deduplicated(self):
candidates = [_candidate(_p('Acme', 0.0, '2026-05-09'))]
idx = ExpensesAgent._find_semantic_duplicate(
_p('Acme Corp', 0.0, '2026-05-09'), candidates)
assert idx is None
# ---------------------------------------------------------------------------
# _plan() — keyword detection
# ---------------------------------------------------------------------------
def _make_agent():
"""Return an ExpensesAgent with all dependencies mocked out."""
agent = ExpensesAgent.__new__(ExpensesAgent)
agent._odoo = MagicMock()
agent._llm = MagicMock()
agent._peer_bus = None
agent._et = MagicMock()
agent._gathered_data = {}
agent._actions_taken = []
agent._escalations_list = []
return agent
def _make_directive(task='', raw_message='', receipts=None):
directive = MagicMock()
directive.task = task
directive.params = {}
directive.directive_id = 'test-dir'
directive.context.peer_data = {'raw_message': raw_message, 'requesting_user_id': 1}
directive.context.receipts = receipts or []
return directive
async def _run_plan(task='', raw_message='', receipts=None):
agent = _make_agent()
agent._directive = _make_directive(task=task, raw_message=raw_message, receipts=receipts)
return await agent._plan()
@pytest.mark.asyncio
async def test_plan_confirm_keyword_sets_confirmed():
plan = await _run_plan(raw_message='confirm')
assert plan['user_confirmed'] is True
@pytest.mark.asyncio
async def test_plan_looks_good_sets_confirmed():
plan = await _run_plan(raw_message='looks good')
assert plan['user_confirmed'] is True
@pytest.mark.asyncio
async def test_plan_go_ahead_sets_confirmed():
plan = await _run_plan(raw_message='go ahead')
assert plan['user_confirmed'] is True
@pytest.mark.asyncio
async def test_plan_no_keyword_not_confirmed():
plan = await _run_plan(raw_message='create an expense report')
assert plan['user_confirmed'] is False
@pytest.mark.asyncio
async def test_plan_keep_all_sets_dup_decision():
plan = await _run_plan(raw_message='confirm, keep all')
assert plan['user_confirmed'] is True
assert plan['user_dup_decision'] == 'keep_all'
@pytest.mark.asyncio
async def test_plan_skip_sets_dup_decision():
plan = await _run_plan(raw_message='skip duplicates')
assert plan['user_dup_decision'] == 'skip'
@pytest.mark.asyncio
async def test_plan_default_dup_decision_is_skip():
"""When user says 'confirm' with no dup instruction, default to skip."""
plan = await _run_plan(raw_message='confirm')
assert plan['user_dup_decision'] == 'skip'
@pytest.mark.asyncio
async def test_plan_mode_is_read_without_receipts():
plan = await _run_plan(raw_message='show my expenses')
assert plan['mode'] == 'read'
@pytest.mark.asyncio
async def test_plan_mode_is_create_with_receipts():
fake_receipt = {'filename': 'receipt.jpg', 'text': '', 'b64': '', 'sha256': 'abc'}
plan = await _run_plan(raw_message='create expense report', receipts=[fake_receipt])
assert plan['mode'] == 'create_from_receipts'
@pytest.mark.asyncio
async def test_plan_task_field_also_checked():
"""master LLM writes intent_summary into task; confirm in task should work."""
plan = await _run_plan(task='confirm the expense report creation', raw_message='')
assert plan['user_confirmed'] is True
# ---------------------------------------------------------------------------
# _act() confirmation gate
# ---------------------------------------------------------------------------
@pytest.mark.asyncio
async def test_act_creates_expenses_immediately():
"""Expenses are created in draft immediately — no confirmation gate.
The old two-step confirm flow was removed because receipts are only
available in the initial /upload request, making a follow-up confirmation
turn impossible. _act() now creates draft expenses straight away.
"""
agent = _make_agent()
fake_receipt = {
'filename': 'receipt.jpg', 'text': 'Acme $10.00',
'b64': '', 'sha256': 'abc123', 'mimetype': 'image/jpeg',
'date_from_name': None,
}
agent._directive = _make_directive(raw_message='create expense report', receipts=[fake_receipt])
agent._gathered_data = {
'mode': 'create_from_receipts',
'user_confirmed': False,
'user_dup_decision': 'skip',
}
parsed_result = {'vendor': 'Acme', 'amount': 10.00, 'date': '2026-05-09',
'time': None, 'product_name': ''}
sheet_result = MagicMock(success=True, record_id=42)
expense_result = MagicMock(success=True, record_id=99)
agent._et.get_employee_id_for_user = AsyncMock(return_value=1)
agent._et.get_expense_products = AsyncMock(return_value=[{'id': 1, 'name': 'Meals'}])
agent._et.create_expense_sheet = AsyncMock(return_value=sheet_result)
agent._et.create_expense = AsyncMock(return_value=expense_result)
with patch.object(agent, '_parse_receipt_text', new=AsyncMock(return_value=parsed_result)):
actions = await agent._act({})
assert any('Created expense sheet' in a for a in actions)
agent._et.create_expense_sheet.assert_called_once()
agent._et.create_expense.assert_called_once()
@pytest.mark.asyncio
async def test_act_creates_sheet_when_confirmed():
"""Second call with user_confirmed=True → expense sheet is created."""
agent = _make_agent()
fake_receipt = {
'filename': 'receipt.jpg', 'text': 'Acme $10.00',
'b64': base64.b64encode(b'imgdata').decode(), 'sha256': 'abc123',
'mimetype': 'image/jpeg', 'date_from_name': None,
}
agent._directive = _make_directive(raw_message='confirm', receipts=[fake_receipt])
agent._gathered_data = {
'mode': 'create_from_receipts',
'user_confirmed': True,
'user_dup_decision': 'skip',
}
parsed_result = {'vendor': 'Acme', 'amount': 10.00, 'date': '2026-05-09',
'time': None, 'product_name': 'Meals'}
sheet_result = MagicMock(success=True, record_id=42)
expense_result = MagicMock(success=True, record_id=99)
agent._et.get_employee_id_for_user = AsyncMock(return_value=1)
agent._et.get_expense_products = AsyncMock(return_value=[{'id': 1, 'name': 'Meals'}])
agent._et.create_expense_sheet = AsyncMock(return_value=sheet_result)
agent._et.create_expense = AsyncMock(return_value=expense_result)
agent._et.attach_receipt = AsyncMock()
with patch.object(agent, '_parse_receipt_text', new=AsyncMock(return_value=parsed_result)):
actions = await agent._act({})
assert any('Created expense sheet' in a for a in actions)
assert any('Acme' in a for a in actions)
agent._et.create_expense_sheet.assert_called_once()
agent._et.create_expense.assert_called_once()
@pytest.mark.asyncio
async def test_act_deduplicates_byte_identical_receipts():
"""Two receipts with the same SHA256 → only one expense created."""
agent = _make_agent()
receipt = {
'filename': 'receipt.jpg', 'text': 'Acme $10.00',
'b64': '', 'sha256': 'samehash', 'mimetype': 'image/jpeg',
'date_from_name': None,
}
agent._directive = _make_directive(raw_message='confirm', receipts=[receipt, receipt])
agent._gathered_data = {
'mode': 'create_from_receipts',
'user_confirmed': True,
'user_dup_decision': 'skip',
}
parsed_result = {'vendor': 'Acme', 'amount': 10.00, 'date': '2026-05-09',
'time': None, 'product_name': ''}
sheet_result = MagicMock(success=True, record_id=1)
expense_result = MagicMock(success=True, record_id=2)
agent._et.get_employee_id_for_user = AsyncMock(return_value=1)
agent._et.get_expense_products = AsyncMock(return_value=[{'id': 1, 'name': 'Meals'}])
agent._et.create_expense_sheet = AsyncMock(return_value=sheet_result)
agent._et.create_expense = AsyncMock(return_value=expense_result)
agent._et.attach_receipt = AsyncMock()
with patch.object(agent, '_parse_receipt_text', new=AsyncMock(return_value=parsed_result)):
await agent._act({})
# Only one create_expense call despite two identical receipts
assert agent._et.create_expense.call_count == 1
@pytest.mark.asyncio
async def test_act_no_employee_returns_empty_and_escalates():
agent = _make_agent()
fake_receipt = {'filename': 'r.jpg', 'text': '', 'b64': '', 'sha256': 'x',
'mimetype': 'image/jpeg', 'date_from_name': None}
agent._directive = _make_directive(raw_message='confirm', receipts=[fake_receipt])
agent._gathered_data = {
'mode': 'create_from_receipts',
'user_confirmed': True,
'user_dup_decision': 'skip',
}
agent._et.get_employee_id_for_user = AsyncMock(return_value=None)
agent._et.get_expense_products = AsyncMock(return_value=[])
result = await agent._act({})
assert result == []
assert any('No employee record' in e for e in agent._escalations_list)
# ---------------------------------------------------------------------------
# _extract_amount_from_text / _extract_date_from_text — regex helpers
# ---------------------------------------------------------------------------
from agent_service.agents.expenses_agent import (
_extract_amount_from_text, _extract_date_from_text,
)
class TestExtractAmount:
def test_simple_total(self):
assert _extract_amount_from_text('Acme\nTotal: $9.99') == 9.99
def test_grand_total(self):
assert _extract_amount_from_text('Subtotal: $20.00\nGrand Total: $22.46') == 22.46
def test_amount_due(self):
assert _extract_amount_from_text('Amount Due: 198.40') == 198.40
def test_no_dollar_sign(self):
assert _extract_amount_from_text('TOTAL 15.75') == 15.75
def test_last_match_wins(self):
# Grand total should beat subtotal
text = 'Subtotal 18.00\nTax 1.50\nTotal 19.50'
assert _extract_amount_from_text(text) == 19.50
def test_empty_text(self):
assert _extract_amount_from_text('') == 0.0
def test_no_total_line(self):
assert _extract_amount_from_text('No price here') == 0.0
def test_comma_in_amount(self):
assert _extract_amount_from_text('Grand Total: $1,234.56') == 1234.56
class TestExtractDate:
def test_iso_format(self):
assert _extract_date_from_text('Date: 2026-05-09') == '2026-05-09'
def test_slash_iso(self):
assert _extract_date_from_text('2026/05/09') == '2026-05-09'
def test_us_format(self):
assert _extract_date_from_text('05/09/2026') == '2026-05-09'
def test_us_short_year(self):
assert _extract_date_from_text('05/09/26') == '2026-05-09'
def test_no_date(self):
assert _extract_date_from_text('No date here') is None
def test_empty(self):
assert _extract_date_from_text('') is None
# ---------------------------------------------------------------------------
# _parse_receipt_text — combined extraction
# ---------------------------------------------------------------------------
@pytest.mark.asyncio
async def test_parse_plain_ocr_text_uses_llm_for_vendor():
"""Regex extracts amount; LLM called only for vendor + product_name."""
agent = _make_agent()
llm_resp = MagicMock()
# LLM now only returns vendor + product_name
llm_resp.content = '{"vendor":"Acme","product_name":"Meals"}'
agent._llm.submit = AsyncMock(return_value=llm_resp)
result = await agent._parse_receipt_text(
'Acme Store\nTotal: $9.99', 'receipt.jpg',
expense_products=[{'id': 1, 'name': 'Meals'}],
)
assert result['vendor'] == 'Acme'
assert result['amount'] == 9.99 # from regex, not LLM
assert result['product_name'] == 'Meals'
agent._llm.submit.assert_called_once()
@pytest.mark.asyncio
async def test_parse_date_hint_overrides_ocr_date():
"""date_hint from filename must be used; LLM date should be ignored."""
agent = _make_agent()
llm_resp = MagicMock()
llm_resp.content = '{"vendor":"Shell","product_name":"Fuel"}'
agent._llm.submit = AsyncMock(return_value=llm_resp)
result = await agent._parse_receipt_text(
'Shell Gas\n05/09/2021\nTotal: $45.00', 'shell.jpg',
date_hint='2026-05-09',
)
assert result['date'] == '2026-05-09' # filename timestamp wins
assert result['amount'] == 45.00
@pytest.mark.asyncio
async def test_parse_ocr_failed_skips_llm_amount():
"""When OCR fails, amount=0 and date comes from hint or today."""
agent = _make_agent()
llm_resp = MagicMock()
llm_resp.content = '{"vendor":"","product_name":"Meals"}'
agent._llm.submit = AsyncMock(return_value=llm_resp)
result = await agent._parse_receipt_text(
'[Image: broken.jpg — OCR failed]', 'broken.jpg',
date_hint='2026-05-10',
expense_products=[{'id': 1, 'name': 'Meals'}],
)
assert result['amount'] == 0.0
assert result['date'] == '2026-05-10'
# ---------------------------------------------------------------------------
# parse_upload — receipt_parser.py
# ---------------------------------------------------------------------------
from agent_service.tools.receipt_parser import parse_upload
class TestParseUpload:
def test_text_file_parsed(self):
results = parse_upload('receipt.txt', b'Acme Store\nTotal: $10.00')
assert len(results) == 1
r = results[0]
assert r['filename'] == 'receipt.txt'
assert 'Acme Store' in r['text']
assert r['mimetype'] == 'text/plain'
assert r['sha256'] # hash present
def test_date_extracted_from_filename(self):
results = parse_upload('20260509_180857.jpg_compressed.JPEG', b'\xff\xd8\xff')
assert results[0]['date_from_name'] == '2026-05-09'
def test_no_date_in_plain_filename(self):
results = parse_upload('receipt.txt', b'text')
assert results[0]['date_from_name'] is None
def test_zip_extracted(self):
buf = io.BytesIO()
with zipfile.ZipFile(buf, 'w') as zf:
zf.writestr('receipt.txt', 'Vendor: Acme\nTotal: $5.00')
zf.writestr('other.txt', 'Another receipt')
results = parse_upload('bundle.zip', buf.getvalue())
assert len(results) == 2
filenames = {r['filename'] for r in results}
assert 'receipt.txt' in filenames
assert 'other.txt' in filenames
def test_zip_skips_directories(self):
buf = io.BytesIO()
with zipfile.ZipFile(buf, 'w') as zf:
zf.writestr('subdir/', '') # directory entry
zf.writestr('subdir/file.txt', 'content')
results = parse_upload('bundle.zip', buf.getvalue())
assert len(results) == 1
assert results[0]['filename'] == 'file.txt'
def test_empty_zip_returns_empty(self):
buf = io.BytesIO()
with zipfile.ZipFile(buf, 'w'):
pass
results = parse_upload('empty.zip', buf.getvalue())
assert results == []
def test_sha256_is_consistent(self):
data = b'some receipt bytes'
r1 = parse_upload('a.txt', data)[0]
r2 = parse_upload('b.txt', data)[0]
assert r1['sha256'] == r2['sha256']
def test_b64_decodes_to_original(self):
data = b'receipt content here'
result = parse_upload('r.txt', data)[0]
assert base64.b64decode(result['b64']) == data
# ---------------------------------------------------------------------------
# _text_to_html — ab_ai_mail.py
# ---------------------------------------------------------------------------
from agent_service.agents.expenses_agent import ExpensesAgent # already imported
# Import from Odoo addon directly
import sys, importlib
def _get_text_to_html():
"""Import _text_to_html without triggering Odoo module loading."""
import importlib.util, pathlib
path = pathlib.Path(__file__).parent.parent / 'addons' / 'activeblue_ai' / 'models' / 'ab_ai_mail.py'
spec = importlib.util.spec_from_file_location('ab_ai_mail', path)
mod = importlib.util.module_from_spec(spec)
# Stub out the odoo imports so the module loads without Odoo installed
sys.modules.setdefault('odoo', MagicMock())
sys.modules.setdefault('odoo.SUPERUSER_ID', MagicMock())
sys.modules.setdefault('markupsafe', __import__('markupsafe'))
spec.loader.exec_module(mod)
return mod._text_to_html
class TestTextToHtml:
@pytest.fixture(autouse=True)
def fn(self):
try:
self._fn = _get_text_to_html()
except Exception:
pytest.skip('ab_ai_mail could not be imported without Odoo environment')
def test_plain_text_unchanged(self):
result = str(self._fn('hello world'))
assert 'hello world' in result
def test_newline_becomes_br(self):
result = str(self._fn('line one\nline two'))
assert '<br>' in result
assert 'line one' in result
assert 'line two' in result
def test_html_special_chars_escaped(self):
result = str(self._fn('<script>alert("xss")</script>'))
assert '<script>' not in result
assert '&lt;script&gt;' in result
def test_ampersand_escaped(self):
result = str(self._fn('Layal Cafe & Banquet'))
assert '&amp;' in result
def test_empty_string(self):
result = str(self._fn(''))
assert result == ''