Testing Patterns

Pytest templates for comprehensive ETL pipeline testing.

Unit Tests - Transform Functions

# tests/test_transforms.py
import pytest
import pandas as pd
from pipeline.transforms import clean_email, calculate_total, categorize_customer

class TestCleanEmail:
    def test_lowercase(self):
        assert clean_email("John@Example.COM") == "john@example.com"

    def test_strip_whitespace(self):
        assert clean_email("  john@example.com  ") == "john@example.com"