feat(SIMPL-24642): migrate tests from 3 source repos with updated imports

tests/data_processing/conftest.py

@@ -0,0 +1,53 @@
+"""Pytest configuration and shared fixtures."""
+
+import pytest
+import pandas as pd
+from unittest.mock import MagicMock, patch
+import sys
+from dagster import build_op_context
+
+# Mock external dependencies that might not be available in test environment
+sys.modules['spellchecker'] = MagicMock()
+
+
+@pytest.fixture
+def mock_context():
+    """Create a mock Dagster context for testing operations."""
+    context = build_op_context()
+    return context
+
+
+@pytest.fixture
+def sample_dataframe():
+    """Create a sample DataFrame for testing."""
+    return pd.DataFrame({
+        'Name': ['John Doe', 'jane smith', 'John Doe', 'bob johnson', 'John Doe'],
+        'Age': [25, 30, 25, None, 25],
+        'City': ['New York', 'los angeles', 'New York', 'chicago', 'New York'],
+        'Status': ['Active', 'INACTIVE', 'Active', 'penDing', 'Active']
+    })
+
+
+@pytest.fixture
+def sample_dataframe_with_typos():
+    """Create a sample DataFrame with typos for spell checking."""
+    return pd.DataFrame({
+        'Name': ['jon doe', 'jane smith', 'bob jonson'],
+        'Description': ['developer', 'analst', 'enginer']
+    })
+
+
+@pytest.fixture
+def empty_dataframe():
+    """Create an empty DataFrame."""
+    return pd.DataFrame()
+
+
+@pytest.fixture
+def dataframe_with_missing_values():
+    """Create a DataFrame with various missing values."""
+    return pd.DataFrame({
+        'Column1': [1, None, 3, None, 5],
+        'Column2': ['a', 'b', None, 'd', None],
+        'Column3': [None, None, None, None, None]
+    })