"""Unit tests for test pattern generator."""

import pytest


def test_pattern_generator_import():
    """Verify the module imports cleanly."""
    from gateware.test_pattern import TestPatternGenerator
    gen = TestPatternGenerator(width=8)
    assert gen.width == 8
    assert gen.sample.shape().width == 8


def test_pattern_generator_signals():
    """Verify all expected signals exist."""
    from gateware.test_pattern import TestPatternGenerator
    gen = TestPatternGenerator(width=16)
    assert gen.width == 16
    assert gen.sample.shape().width == 16
    assert gen.valid is not None
    assert gen.pattern is not None
    assert gen.divider is not None