CM-59844: add some basic test coverage to validate updates

Author: gotbadger

tests/cli/apps/__init__.py

@@ -0,0 +1,259 @@
+import asyncio
+import json
+import os
+import sys
+
+import pytest
+
+if sys.version_info < (3, 10):
+    pytest.skip('MCP requires Python 3.10+', allow_module_level=True)
+
+from cycode.cli.apps.mcp.mcp_command import (
+    _sanitize_file_path,
+    _TempFilesManager,
+)
+
+# --- _sanitize_file_path input validation ---
+
+
+def test_sanitize_file_path_rejects_empty_string() -> None:
+    with pytest.raises(ValueError, match='non-empty string'):
+        _sanitize_file_path('')
+
+
+def test_sanitize_file_path_rejects_none() -> None:
+    with pytest.raises(ValueError, match='non-empty string'):
+        _sanitize_file_path(None)
+
+
+def test_sanitize_file_path_rejects_non_string() -> None:
+    with pytest.raises(ValueError, match='non-empty string'):
+        _sanitize_file_path(123)
+
+
+def test_sanitize_file_path_strips_null_bytes() -> None:
+    result = _sanitize_file_path('foo/bar\x00baz.py')
+    assert '\x00' not in result
+
+
+def test_sanitize_file_path_passes_valid_path_through() -> None:
+    assert _sanitize_file_path('src/main.py') == 'src/main.py'
+
+
+# --- _TempFilesManager: path traversal prevention ---
+#
+# _sanitize_file_path delegates to pathvalidate which does NOT block
+# path traversal (../ passes through). The real security boundary is
+# the normpath containment check in _TempFilesManager.__enter__ (lines 136-139).
+# These tests verify that the two layers together prevent escaping the temp dir.
+
+
+def test_traversal_simple_dotdot_rejected() -> None:
+    """../../../etc/passwd must not escape the temp directory."""
+    files = {
+        '../../../etc/passwd': 'malicious',
+        'safe.py': 'ok',
+    }
+    with _TempFilesManager(files, 'test-traversal') as temp_files:
+        assert len(temp_files) == 1
+        assert temp_files[0].endswith('safe.py')
+        for tf in temp_files:
+            assert '/etc/passwd' not in tf
+
+
+def test_traversal_backslash_dotdot_rejected() -> None:
+    """..\\..\\windows\\system32 must not escape the temp directory."""
+    files = {
+        '..\\..\\windows\\system32\\config': 'malicious',
+        'safe.py': 'ok',
+    }
+    with _TempFilesManager(files, 'test-backslash') as temp_files:
+        assert len(temp_files) == 1
+        assert temp_files[0].endswith('safe.py')
+
+
+def test_traversal_embedded_dotdot_rejected() -> None:
+    """foo/../../../etc/passwd resolves outside temp dir and must be rejected."""
+    files = {
+        'foo/../../../etc/passwd': 'malicious',
+        'safe.py': 'ok',
+    }
+    with _TempFilesManager(files, 'test-embedded') as temp_files:
+        assert len(temp_files) == 1
+        assert temp_files[0].endswith('safe.py')
+
+
+def test_traversal_absolute_path_rejected() -> None:
+    """Absolute paths must not be written outside the temp directory."""
+    files = {
+        '/etc/passwd': 'malicious',
+        'safe.py': 'ok',
+    }
+    with _TempFilesManager(files, 'test-absolute') as temp_files:
+        assert len(temp_files) == 1
+        assert temp_files[0].endswith('safe.py')
+
+
+def test_traversal_dotdot_only_rejected() -> None:
+    """A bare '..' path must be rejected."""
+    files = {
+        '..': 'malicious',
+        'safe.py': 'ok',
+    }
+    with _TempFilesManager(files, 'test-bare-dotdot') as temp_files:
+        assert len(temp_files) == 1
+
+
+def test_traversal_all_malicious_raises() -> None:
+    """If every file path is a traversal attempt, no files are created and ValueError is raised."""
+    files = {
+        '../../../etc/passwd': 'malicious',
+        '../../shadow': 'also malicious',
+    }
+    with pytest.raises(ValueError, match='No valid files'), _TempFilesManager(files, 'test-all-malicious'):
+        pass
+
+
+def test_all_created_files_are_inside_temp_dir() -> None:
+    """Every created file must be under the temp base directory."""
+    files = {
+        'a.py': 'aaa',
+        'sub/b.py': 'bbb',
+        'sub/deep/c.py': 'ccc',
+    }
+    manager = _TempFilesManager(files, 'test-containment')
+    with manager as temp_files:
+        base = os.path.normpath(manager.temp_base_dir)
+        for tf in temp_files:
+            normalized = os.path.normpath(tf)
+            assert normalized.startswith(base + os.sep), f'{tf} escaped temp dir {base}'
+
+
+def test_mixed_valid_and_traversal_only_creates_valid() -> None:
+    """Valid files are created, traversal attempts are silently skipped."""
+    files = {
+        '../escape.py': 'bad',
+        'legit.py': 'good',
+        'foo/../../escape2.py': 'bad',
+        'src/app.py': 'good',
+    }
+    manager = _TempFilesManager(files, 'test-mixed')
+    with manager as temp_files:
+        base = os.path.normpath(manager.temp_base_dir)
+        assert len(temp_files) == 2
+        for tf in temp_files:
+            assert os.path.normpath(tf).startswith(base + os.sep)
+        basenames = [os.path.basename(tf) for tf in temp_files]
+        assert 'legit.py' in basenames
+        assert 'app.py' in basenames
+
+
+# --- _TempFilesManager: general functionality ---
+
+
+def test_temp_files_manager_creates_files() -> None:
+    files = {
+        'test1.py': 'print("hello")',
+        'subdir/test2.js': 'console.log("world")',
+    }
+    with _TempFilesManager(files, 'test-call-id') as temp_files:
+        assert len(temp_files) == 2
+        for tf in temp_files:
+            assert os.path.exists(tf)
+
+
+def test_temp_files_manager_writes_correct_content() -> None:
+    files = {'hello.py': 'print("hello world")'}
+    with _TempFilesManager(files, 'test-content') as temp_files, open(temp_files[0]) as f:
+        assert f.read() == 'print("hello world")'
+
+
+def test_temp_files_manager_cleans_up_on_exit() -> None:
+    files = {'cleanup.py': 'code'}
+    manager = _TempFilesManager(files, 'test-cleanup')
+    with manager as temp_files:
+        temp_dir = manager.temp_base_dir
+        assert os.path.exists(temp_dir)
+        assert len(temp_files) == 1
+    assert not os.path.exists(temp_dir)
+
+
+def test_temp_files_manager_empty_path_raises() -> None:
+    files = {'': 'empty path'}
+    with pytest.raises(ValueError, match='No valid files'), _TempFilesManager(files, 'test-empty-path'):
+        pass
+
+
+def test_temp_files_manager_preserves_subdirectory_structure() -> None:
+    files = {
+        'src/main.py': 'main',
+        'src/utils/helper.py': 'helper',
+    }
+    with _TempFilesManager(files, 'test-dirs') as temp_files:
+        assert len(temp_files) == 2
+        paths = [os.path.basename(tf) for tf in temp_files]
+        assert 'main.py' in paths
+        assert 'helper.py' in paths
+
+
+# --- _run_cycode_command (async) ---
+
+
+def test_run_cycode_command_returns_dict() -> None:
+    from cycode.cli.apps.mcp.mcp_command import _run_cycode_command
+
+    result = asyncio.run(_run_cycode_command('--invalid-flag-for-test'))
+    assert isinstance(result, dict)
+
+
+def test_run_cycode_command_timeout() -> None:
+    from cycode.cli.apps.mcp.mcp_command import _run_cycode_command
+
+    result = asyncio.run(_run_cycode_command('status', timeout=0.001))
+    assert isinstance(result, dict)
+    assert 'error' in result
+
+
+# --- _cycode_scan_tool ---
+
+
+def test_cycode_scan_tool_no_files() -> None:
+    from cycode.cli.apps.mcp.mcp_command import _cycode_scan_tool
+    from cycode.cli.cli_types import ScanTypeOption
+
+    result = asyncio.run(_cycode_scan_tool(ScanTypeOption.SECRET, {}))
+    parsed = json.loads(result)
+    assert 'error' in parsed
+    assert 'No files provided' in parsed['error']
+
+
+def test_cycode_scan_tool_invalid_files() -> None:
+    from cycode.cli.apps.mcp.mcp_command import _cycode_scan_tool
+    from cycode.cli.cli_types import ScanTypeOption
+
+    result = asyncio.run(_cycode_scan_tool(ScanTypeOption.SECRET, {'': 'content'}))
+    parsed = json.loads(result)
+    assert 'error' in parsed
+
+
+# --- _create_mcp_server ---
+
+
+def test_create_mcp_server() -> None:
+    from cycode.cli.apps.mcp.mcp_command import _create_mcp_server
+
+    server = _create_mcp_server('127.0.0.1', 8000)
+    assert server is not None
+    assert server.name == 'cycode'
+
+
+def test_create_mcp_server_registers_tools() -> None:
+    from cycode.cli.apps.mcp.mcp_command import _create_mcp_server
+
+    server = _create_mcp_server('127.0.0.1', 8000)
+    tool_names = [t.name for t in server._tool_manager._tools.values()]
+    assert 'cycode_status' in tool_names
+    assert 'cycode_secret_scan' in tool_names
+    assert 'cycode_sca_scan' in tool_names
+    assert 'cycode_iac_scan' in tool_names
+    assert 'cycode_sast_scan' in tool_names