"""Tests for engine.figment_render module."""

import os

from engine.figment_render import rasterize_svg

FIXTURE_SVG = os.path.join(os.path.dirname(__file__), "fixtures", "test.svg")


class TestRasterizeSvg:
    def test_returns_list_of_strings(self):
        rows = rasterize_svg(FIXTURE_SVG, 40, 20)
        assert isinstance(rows, list)
        assert all(isinstance(r, str) for r in rows)

    def test_output_height_matches_terminal_height(self):
        rows = rasterize_svg(FIXTURE_SVG, 40, 20)
        assert len(rows) == 20

    def test_output_contains_block_characters(self):
        rows = rasterize_svg(FIXTURE_SVG, 40, 20)
        all_chars = "".join(rows)
        block_chars = {"█", "▀", "▄"}
        assert any(ch in all_chars for ch in block_chars)

    def test_different_sizes_produce_different_output(self):
        rows_small = rasterize_svg(FIXTURE_SVG, 20, 10)
        rows_large = rasterize_svg(FIXTURE_SVG, 80, 40)
        assert len(rows_small) == 10
        assert len(rows_large) == 40

    def test_nonexistent_file_raises(self):
        import pytest

        with pytest.raises((FileNotFoundError, OSError)):
            rasterize_svg("/nonexistent/file.svg", 40, 20)


class TestRasterizeCache:
    def test_cache_returns_same_result(self):
        rows1 = rasterize_svg(FIXTURE_SVG, 40, 20)
        rows2 = rasterize_svg(FIXTURE_SVG, 40, 20)
        assert rows1 == rows2

    def test_cache_invalidated_by_size_change(self):
        rows1 = rasterize_svg(FIXTURE_SVG, 40, 20)
        rows2 = rasterize_svg(FIXTURE_SVG, 60, 30)
        assert len(rows1) != len(rows2)