test(04-05): add failing tests for CLI process subcommand

- Test process --help shows usage
- Test process <url> calls Pipeline.run()
- Test invalid URL returns error
- Test --output-dir flag
- Test --no-skip flag

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

tests/test_cli/__init__.py

@@ -0,0 +1 @@
+"""CLI Tests - Tests for command-line interface"""

tests/test_cli/test_process_command.py

@@ -0,0 +1,145 @@
+"""Tests for CLI 'process' subcommand
+
+Tests:
+1. `kb-workflow process --help` shows usage
+2. `kb-workflow process <url>` calls Pipeline.run()
+3. Invalid URL returns appropriate error
+4. --output-dir flag sets custom output directory
+"""
+
+import pytest
+import sys
+from unittest.mock import patch, MagicMock, AsyncMock
+from pathlib import Path
+
+# Add kb-workflow to path for imports
+sys.path.insert(0, '/home/starmen1265/work/kb-skills/kb-workflow')
+
+
+class TestProcessCommandHelp:
+    """Test 1: `kb-workflow process --help` shows usage"""
+
+    def test_process_help_shows_usage(self, capsys):
+        """`kb-workflow process --help` shows usage information"""
+        import kb_workflow
+
+        # Mock sys.argv
+        with patch.object(sys, 'argv', ['kb-workflow', 'process', '--help']):
+            with pytest.raises(SystemExit) as exc_info:
+                kb_workflow.main()
+            # --help exits with 0
+            assert exc_info.value.code == 0
+
+        captured = capsys.readouterr()
+        # Should show process command in help
+        assert 'process' in captured.out.lower() or 'url' in captured.out.lower()
+
+
+class TestProcessCommandCallsPipeline:
+    """Test 2: `kb-workflow process <url>` calls Pipeline.run()"""
+
+    def test_process_url_calls_pipeline_run(self, capsys):
+        """`kb-workflow process <url>` calls Pipeline.run()"""
+        import kb_workflow
+
+        with patch.object(kb_workflow, 'process_command') as mock_process:
+            mock_process.return_value = {"success": True, "content_dir": "/tmp/content"}
+
+            with patch.object(sys, 'argv', ['kb-workflow', 'process', 'https://www.bilibili.com/video/BV1test']):
+                kb_workflow.main()
+
+            # process_command should be called with the URL
+            mock_process.assert_called_once()
+            call_args = mock_process.call_args
+            assert 'https://www.bilibili.com/video/BV1test' in str(call_args)
+
+    def test_process_url_with_output_dir(self, capsys):
+        """`kb-workflow process <url> --output-dir /custom` passes output_dir"""
+        import kb_workflow
+
+        with patch.object(kb_workflow, 'process_command') as mock_process:
+            mock_process.return_value = {"success": True, "content_dir": "/custom"}
+
+            with patch.object(sys, 'argv', [
+                'kb-workflow', 'process',
+                'https://www.bilibili.com/video/BV1test',
+                '--output-dir', '/custom/output'
+            ]):
+                kb_workflow.main()
+
+            call_kwargs = mock_process.call_args[1]
+            assert call_kwargs.get('output_dir') == '/custom/output'
+
+
+class TestProcessCommandInvalidUrl:
+    """Test 3: Invalid URL returns appropriate error"""
+
+    def test_process_invalid_url_returns_error(self, capsys):
+        """`kb-workflow process <invalid-url>` returns appropriate error"""
+        import kb_workflow
+
+        with patch.object(kb_workflow, 'process_command') as mock_process:
+            mock_process.return_value = {
+                "success": False,
+                "error": "Failed to parse URL: invalid-url"
+            }
+
+            with patch.object(sys, 'argv', ['kb-workflow', 'process', 'invalid-url']):
+                kb_workflow.main()
+
+            # process_command should be called
+            mock_process.assert_called_once()
+
+
+class TestProcessCommandFlags:
+    """Test 4: --output-dir flag sets custom output directory"""
+
+    def test_output_dir_flag_sets_custom_directory(self):
+        """--output-dir flag sets custom output directory"""
+        import kb_workflow
+
+        with patch.object(kb_workflow, 'process_command') as mock_process:
+            mock_process.return_value = {"success": True}
+
+            with patch.object(sys, 'argv', [
+                'kb-workflow', 'process',
+                'https://www.bilibili.com/video/BV1test',
+                '-o', '/tmp/custom'
+            ]):
+                kb_workflow.main()
+
+            call_kwargs = mock_process.call_args[1]
+            assert call_kwargs.get('output_dir') == '/tmp/custom'
+
+    def test_skip_completed_default_true(self):
+        """skip_completed defaults to True"""
+        import kb_workflow
+
+        with patch.object(kb_workflow, 'process_command') as mock_process:
+            mock_process.return_value = {"success": True}
+
+            with patch.object(sys, 'argv', [
+                'kb-workflow', 'process',
+                'https://www.bilibili.com/video/BV1test'
+            ]):
+                kb_workflow.main()
+
+            call_kwargs = mock_process.call_args[1]
+            assert call_kwargs.get('skip_completed') is True
+
+    def test_no_skip_flag_disables_skip_completed(self):
+        """--no-skip flag disables skip_completed"""
+        import kb_workflow
+
+        with patch.object(kb_workflow, 'process_command') as mock_process:
+            mock_process.return_value = {"success": True}
+
+            with patch.object(sys, 'argv', [
+                'kb-workflow', 'process',
+                'https://www.bilibili.com/video/BV1test',
+                '--no-skip'
+            ]):
+                kb_workflow.main()
+
+            call_kwargs = mock_process.call_args[1]
+            assert call_kwargs.get('skip_completed') is False