Module fixtures 

Test data fixtures and dataset generation

Provides utilities for creating test datasets:

• Various data patterns (zeros, sequential, random, text, etc.)
• File generation with controlled sizes
• Realistic test data scenarios

Enums

TestDataPattern

Test data patterns for file generation

Functions

create_test_data

Create test data with specified pattern

create_test_dataset

Create a test dataset directory with multiple files

verify_data_sampled

Verify data matches expected pattern (with sampling for large data)

write_file_of_size

Write a file of specified size with pattern