diff --git a/tests/conftest.py b/tests/conftest.py
index 78fce94267..7f4951a66e 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -1,8 +1,253 @@
-"""Pytest configuration and fixtures for Python Deadlines tests."""
+"""Pytest configuration and fixtures for Python Deadlines tests.
+This module provides shared fixtures for testing the conference synchronization
+pipeline. Fixtures use real data structures and only mock external I/O boundaries
+(network, file system) following testing best practices.
+
+Note: Shared Hypothesis strategies are in hypothesis_strategies.py - import
+them directly in test files that need property-based testing.
+"""
+
+from pathlib import Path
+from unittest.mock import patch
+
+import pandas as pd
import pytest
import yaml
+# ---------------------------------------------------------------------------
+# Hypothesis Configuration for CI/Dev/Debug profiles
+# ---------------------------------------------------------------------------
+
+try:
+ from hypothesis import Phase
+ from hypothesis import settings
+
+ # CI profile: More thorough testing, no time limit
+ settings.register_profile("ci", max_examples=200, deadline=None)
+
+ # Dev profile: Balanced speed and coverage
+ settings.register_profile("dev", max_examples=50, deadline=200)
+
+ # Debug profile: Minimal examples for fast iteration
+ settings.register_profile("debug", max_examples=10, phases=[Phase.generate])
+
+ # Load dev profile by default (can be overridden with --hypothesis-profile)
+ settings.load_profile("dev")
+
+ HYPOTHESIS_AVAILABLE = True
+except ImportError:
+ HYPOTHESIS_AVAILABLE = False
+
+
+# ---------------------------------------------------------------------------
+# Path constants for test data
+# ---------------------------------------------------------------------------
+TEST_DATA_DIR = Path(__file__).parent / "test_data"
+
+
+# ---------------------------------------------------------------------------
+# DataFrame Fixtures - Real data for testing core logic
+# ---------------------------------------------------------------------------
+
+
+@pytest.fixture()
+def minimal_yaml_df():
+ """Load minimal test YAML as DataFrame for fuzzy matching tests.
+
+ This fixture provides a real DataFrame from YAML data to test
+ core matching and merge logic without mocking.
+ """
+ yaml_path = TEST_DATA_DIR / "minimal_yaml.yml"
+ with yaml_path.open(encoding="utf-8") as f:
+ data = yaml.safe_load(f)
+ df = pd.DataFrame(data)
+ return df.set_index("conference", drop=False)
+
+
+@pytest.fixture()
+def minimal_csv_df():
+ """Load minimal test CSV as DataFrame for fuzzy matching tests.
+
+ Uses CSV format with name variants to test matching against YAML.
+ """
+ csv_path = TEST_DATA_DIR / "minimal_csv.csv"
+ df = pd.read_csv(csv_path)
+
+ # Map CSV columns to match expected conference schema
+ column_mapping = {
+ "Subject": "conference",
+ "Start Date": "start",
+ "End Date": "end",
+ "Location": "place",
+ "Description": "link",
+ }
+ df = df.rename(columns=column_mapping)
+
+ # Extract year from start date
+ df["start"] = pd.to_datetime(df["start"])
+ df["year"] = df["start"].dt.year
+ df["start"] = df["start"].dt.date
+ df["end"] = pd.to_datetime(df["end"]).dt.date
+
+ return df
+
+
+@pytest.fixture()
+def edge_cases_df():
+ """Load edge case test data as DataFrame.
+
+ Contains conferences with:
+ - TBA CFP dates
+ - Online conferences (no location)
+ - Extra places (multiple venues)
+ - Special characters in names (México)
+ - Workshop/tutorial deadlines
+ """
+ yaml_path = TEST_DATA_DIR / "edge_cases.yml"
+ with yaml_path.open(encoding="utf-8") as f:
+ data = yaml.safe_load(f)
+ return pd.DataFrame(data)
+
+
+@pytest.fixture()
+def merge_conflicts_df():
+ """Load test data with merge conflicts for conflict resolution testing.
+
+ Contains conferences where YAML and CSV have conflicting values
+ to verify merge strategy and logging.
+ """
+ yaml_path = TEST_DATA_DIR / "merge_conflicts.yml"
+ with yaml_path.open(encoding="utf-8") as f:
+ data = yaml.safe_load(f)
+ return pd.DataFrame(data)
+
+
+# ---------------------------------------------------------------------------
+# Mock Fixtures - Mock ONLY external I/O boundaries
+# ---------------------------------------------------------------------------
+
+
+@pytest.fixture()
+def mock_title_mappings():
+ """Mock the title mappings file I/O to avoid file system dependencies.
+
+ This mocks the file loading/writing operations but NOT the core
+ matching logic. Use this when you need to test fuzzy_match without
+ actual title mapping files.
+
+ The fuzzy_match function calls load_title_mappings from multiple locations:
+ - tidy_conf.interactive_merge.load_title_mappings
+ - tidy_conf.titles.load_title_mappings (via tidy_df_names)
+
+ It also calls update_title_mappings which writes to files.
+ """
+ with (
+ patch("tidy_conf.interactive_merge.load_title_mappings") as mock_load1,
+ patch("tidy_conf.titles.load_title_mappings") as mock_load2,
+ patch("tidy_conf.interactive_merge.update_title_mappings") as mock_update,
+ ):
+ # Return empty mappings (list, dict) for both load calls
+ mock_load1.return_value = ([], {})
+ mock_load2.return_value = ([], {})
+ mock_update.return_value = None
+ yield {
+ "load_interactive": mock_load1,
+ "load_titles": mock_load2,
+ "update": mock_update,
+ }
+
+
+@pytest.fixture()
+def mock_title_mappings_with_data():
+ """Mock title mappings with realistic mapping data.
+
+ Includes known mappings like:
+ - PyCon DE -> PyCon Germany & PyData Conference
+ - PyCon Italia -> PyCon Italy
+ """
+ mapping_data = {
+ "PyCon DE": "PyCon Germany & PyData Conference",
+ "PyCon DE & PyData": "PyCon Germany & PyData Conference",
+ "PyCon Italia": "PyCon Italy",
+ "EuroPython Conference": "EuroPython",
+ "PyCon US 2026": "PyCon US",
+ }
+
+ with (
+ patch("tidy_conf.interactive_merge.load_title_mappings") as mock_load1,
+ patch("tidy_conf.titles.load_title_mappings") as mock_load2,
+ patch("tidy_conf.interactive_merge.update_title_mappings") as mock_update,
+ ):
+ # For interactive_merge, return empty rejections
+ mock_load1.return_value = ([], {})
+
+ # For titles (reverse=True), return the mapping data
+ def load_with_reverse(reverse=False, path=None):
+ if reverse:
+ return ([], mapping_data)
+ return ([], {})
+
+ mock_load2.side_effect = load_with_reverse
+ mock_update.return_value = None
+ yield {
+ "load_interactive": mock_load1,
+ "load_titles": mock_load2,
+ "update": mock_update,
+ "mappings": mapping_data,
+ }
+
+
+@pytest.fixture()
+def _mock_user_accepts_all():
+ """Mock user input to accept all fuzzy match prompts.
+
+ Use this when testing the happy path where user confirms matches.
+ """
+ with patch("builtins.input", return_value="y"):
+ yield
+
+
+@pytest.fixture()
+def _mock_user_rejects_all():
+ """Mock user input to reject all fuzzy match prompts.
+
+ Use this when testing that rejections are handled correctly.
+ """
+ with patch("builtins.input", return_value="n"):
+ yield
+
+
+@pytest.fixture()
+def mock_schema(tmp_path):
+ """Mock the schema loading to use test data directory.
+
+ Also mocks the types.yml loading for sub validation.
+ """
+ types_data = [
+ {"sub": "PY", "name": "Python"},
+ {"sub": "DATA", "name": "Data Science"},
+ {"sub": "WEB", "name": "Web"},
+ {"sub": "SCIPY", "name": "Scientific Python"},
+ {"sub": "BIZ", "name": "Business"},
+ {"sub": "GEO", "name": "Geospatial"},
+ {"sub": "CAMP", "name": "Camp"},
+ {"sub": "DAY", "name": "Day"},
+ ]
+
+ # Create types.yml in tmp_path
+ types_path = tmp_path / "_data"
+ types_path.mkdir(parents=True, exist_ok=True)
+ with (types_path / "types.yml").open("w") as f:
+ yaml.safe_dump(types_data, f)
+
+ return types_path
+
+
+# ---------------------------------------------------------------------------
+# Sample Data Fixtures - Individual conference dictionaries
+# ---------------------------------------------------------------------------
+
@pytest.fixture()
def sample_conference():
@@ -72,6 +317,33 @@ def online_conference():
}
+@pytest.fixture()
+def sample_conferences(sample_conference):
+ """Multiple conferences with known merge behavior.
+
+ Includes:
+ - Original conference
+ - Different conference (EuroSciPy)
+ - Duplicate of original with different deadline (tests conflict resolution)
+ """
+ return [
+ sample_conference,
+ {
+ **sample_conference,
+ "conference": "EuroSciPy 2025",
+ "cfp": "2025-03-01 23:59:00",
+ "link": "https://euroscipy.org",
+ "place": "Basel, Switzerland",
+ },
+ {
+ **sample_conference,
+ "conference": "PyCon Test", # Same name = duplicate!
+ "cfp": "2025-01-20 23:59:00", # Different deadline
+ "link": "https://test.pycon.org/updated", # Different link
+ },
+ ]
+
+
@pytest.fixture()
def sample_csv_data():
"""Sample CSV data for import testing."""
diff --git a/tests/frontend/unit/dashboard-filters.test.js b/tests/frontend/unit/dashboard-filters.test.js
index 557a1b0bc8..f86dfc29d9 100644
--- a/tests/frontend/unit/dashboard-filters.test.js
+++ b/tests/frontend/unit/dashboard-filters.test.js
@@ -40,6 +40,13 @@ describe('DashboardFilters', () => {
+
+
+