feat: add rich ui for converting

tests/test_converter_ui.py

@@ -0,0 +1,92 @@
+"""Tests for converter UI functionality."""
+
+from pathlib import Path
+from unittest.mock import Mock, patch
+
+import pytest
+from rich.console import Console
+
+from paperlib.ui import ConversionUI
+
+
+class TestConversionUI:
+    """Test ConversionUI functionality."""
+
+    @pytest.fixture
+    def ui(self):
+        """Create a ConversionUI instance for testing."""
+        # Use a console that doesn't output to terminal during tests
+        console = Console(file=open("/dev/null", "w"), force_terminal=True)
+        return ConversionUI(console=console)
+
+    @pytest.fixture
+    def mock_papers(self):
+        """Create mock paper metadata for testing."""
+        papers = []
+        for i in range(3):
+            paper = Mock()
+            paper.paper_id = f"test-paper-{i + 1}"
+            paper.title = f"Test Paper Title {i + 1}"
+            papers.append(paper)
+        return papers
+
+    def test_format_mineru_output_line(self, ui):
+        """Test formatting of MinerU output lines."""
+        # Test INFO line
+        info_line = "2026-04-17 17:46:01.450 | INFO | Processing started"
+        formatted = ui._format_mineru_output_line(info_line)
+        assert "[dim]" in formatted
+
+        # Test ERROR line
+        error_line = "ERROR: Conversion failed"
+        formatted = ui._format_mineru_output_line(error_line)
+        assert "[red]" in formatted
+
+        # Test WARNING line
+        warning_line = "WARNING: Low memory"
+        formatted = ui._format_mineru_output_line(warning_line)
+        assert "[yellow]" in formatted
+
+        # Test progress line
+        progress_line = "Layout Predict: 50%|█████     | 22/44 [00:15<00:15, 1.44it/s]"
+        formatted = ui._format_mineru_output_line(progress_line)
+        assert "[blue]" in formatted
+
+        # Test fetching line (may be colored blue due to % character)
+        fetch_line = "Fetching 7 files: 100%|██████████| 7/7"
+        formatted = ui._format_mineru_output_line(fetch_line)
+        assert ("[cyan]" in formatted) or (
+            "[blue]" in formatted
+        )  # Either color is fine
+
+    @patch("threading.Thread")
+    @patch("time.sleep")
+    def test_run_conversion_with_ui_empty(self, mock_sleep, mock_thread, ui):
+        """Test UI with no papers to convert."""
+        result = ui.run_conversion_with_ui([], lambda x: True)
+        assert result == (0, 0)
+
+    def test_create_display_table(self, ui):
+        """Test creating the display table."""
+        task_id = ui.progress.add_task("test", total=1)
+
+        # Test without current paper
+        table = ui.create_display_table(task_id)
+        assert table is not None
+
+        # Test with current paper
+        table = ui.create_display_table(task_id, "test-paper-1 - Sample Title")
+        assert table is not None
+
+    def test_output_line_management(self, ui):
+        """Test that output lines are properly managed."""
+        # Add many lines
+        for i in range(60):
+            ui.output_lines.append(f"Line {i}")
+
+        # The list can grow beyond 50, but display is limited to last 15 lines
+        assert len(ui.output_lines) == 60
+
+        # Check that display shows only recent lines
+        recent_lines = ui.output_lines[-ui.max_output_lines :]
+        assert len(recent_lines) == ui.max_output_lines