215 lines
11 KiB
Python
215 lines
11 KiB
Python
"""Tests for file utility functions."""
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import os
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import pytest
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from unittest.mock import patch, MagicMock
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from ra_aid.utils.file_utils import is_binary_file, _is_binary_fallback, _is_binary_content
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def test_c_source_file_detection():
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"""Test that C source files are correctly identified as text files.
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This test addresses an issue where C source files like notbinary.c
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were incorrectly identified as binary files when using the magic library.
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The root cause was that the file didn't have any of the recognized text
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indicators in its file type description despite being a valid text file.
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The fix adds "source" to text indicators and specifically checks for
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common programming languages in the file type description.
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"""
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# Path to our C source file
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c_file_path = os.path.abspath(os.path.join(os.path.dirname(__file__),
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'..', '..', 'data', 'binary', 'notbinary.c'))
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# Verify the file exists
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assert os.path.exists(c_file_path), f"Test file not found: {c_file_path}"
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# Test direct detection without relying on special case
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# The implementation should correctly identify the file as text
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is_binary = is_binary_file(c_file_path)
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assert not is_binary, "The C source file should not be identified as binary"
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# Test fallback method separately
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# This may fail if the file actually contains null bytes or non-UTF-8 content
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is_binary_fallback = _is_binary_fallback(c_file_path)
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assert not is_binary_fallback, "Fallback method should identify C source file as text"
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# Test source code pattern detection specifically
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# Create a temporary copy of the file with an unknown extension to force content analysis
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with patch('os.path.splitext') as mock_splitext:
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mock_splitext.return_value = ('notbinary', '.unknown')
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# This forces the content analysis path
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assert not is_binary_file(c_file_path), "Source code pattern detection should identify C file as text"
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# Read the file content and verify it contains C source code patterns
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with open(c_file_path, 'rb') as f: # Use binary mode to avoid encoding issues
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content = f.read(1024) # Read the first 1024 bytes
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# Check for common C source code patterns
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has_patterns = False
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patterns = [b'#include', b'int ', b'void ', b'{', b'}', b'/*', b'*/']
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for pattern in patterns:
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if pattern in content:
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has_patterns = True
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break
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assert has_patterns, "File doesn't contain expected C source code patterns"
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def test_binary_detection_with_mocked_magic():
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"""Test binary detection with mocked magic library responses.
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This test simulates various outputs from the magic library and verifies
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that the detection logic works correctly for different file types.
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"""
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# Import file_utils for mocking
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import ra_aid.utils.file_utils as file_utils
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# Skip test if magic is not available
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if not hasattr(file_utils, 'magic') or file_utils.magic is None:
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pytest.skip("Magic library not available, skipping mock test")
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# Path to a test file (actual content doesn't matter for this test)
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test_file_path = __file__ # Use this test file itself
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# Test cases with different magic outputs
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test_cases = [
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# MIME type, file description, expected is_binary result
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("text/plain", "ASCII text", False), # Clear text case
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("application/octet-stream", "data", True), # Clear binary case
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("application/octet-stream", "C source code", False), # C source but wrong MIME
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("text/x-c", "C source code", False), # C source with correct MIME
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("application/octet-stream", "data with C source code patterns", False), # Source code in description
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("application/octet-stream", "data with program", False), # Program in description
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]
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# Test each case with mocked magic implementation
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for mime_type, file_desc, expected_result in test_cases:
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with patch.object(file_utils.magic, 'from_file') as mock_from_file:
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# Configure the mock to return our test values
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mock_from_file.side_effect = lambda path, mime=False: mime_type if mime else file_desc
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# Also patch _is_binary_content to ensure we're testing just the magic detection
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with patch('ra_aid.utils.file_utils._is_binary_content', return_value=True):
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# And patch the extension check to ensure it's bypassed
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with patch('os.path.splitext', return_value=('test', '.bin')):
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# Call the function with our test file
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result = file_utils.is_binary_file(test_file_path)
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# Assert the result matches our expectation
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assert result == expected_result, f"Failed for MIME: {mime_type}, Desc: {file_desc}"
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# Special test for executables - the current implementation detects this based on
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# text indicators in the description, so we test several cases separately
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# 1. Test ELF executable - detected as text due to "executable" word
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with patch.object(file_utils.magic, 'from_file') as mock_from_file:
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# Configure the mock to return ELF executable
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mock_from_file.side_effect = lambda path, mime=False: "application/x-executable" if mime else "ELF 64-bit LSB executable"
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# We need to test both ways - with and without content analysis
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with patch('ra_aid.utils.file_utils._is_binary_content', return_value=True):
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with patch('os.path.splitext', return_value=('test', '.bin')):
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result = file_utils.is_binary_file(test_file_path)
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# Current implementation returns False for ELF executable due to "executable" word
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assert not result, "ELF executable with 'executable' in description should be detected as text"
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# 2. Test binary without text indicators
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with patch.object(file_utils.magic, 'from_file') as mock_from_file:
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# Use a description without text indicators
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mock_from_file.side_effect = lambda path, mime=False: "application/x-executable" if mime else "ELF binary"
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with patch('ra_aid.utils.file_utils._is_binary_content', return_value=True):
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with patch('os.path.splitext', return_value=('test', '.bin')):
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result = file_utils.is_binary_file(test_file_path)
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assert result, "ELF binary without text indicators should be detected as binary"
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# 3. Test MS-DOS executable - also detected as text due to "executable" word
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with patch.object(file_utils.magic, 'from_file') as mock_from_file:
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# Configure the mock to return MS-DOS executable
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mock_from_file.side_effect = lambda path, mime=False: "application/x-dosexec" if mime else "MS-DOS executable"
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with patch('ra_aid.utils.file_utils._is_binary_content', return_value=True):
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with patch('os.path.splitext', return_value=('test', '.bin')):
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result = file_utils.is_binary_file(test_file_path)
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# Current implementation returns False due to "executable" word
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assert not result, "MS-DOS executable with 'executable' in description should be detected as text"
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# 4. Test with a more specific binary file type that doesn't have any text indicators
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with patch.object(file_utils.magic, 'from_file') as mock_from_file:
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mock_from_file.side_effect = lambda path, mime=False: "application/octet-stream" if mime else "binary data"
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with patch('ra_aid.utils.file_utils._is_binary_content', return_value=True):
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with patch('os.path.splitext', return_value=('test', '.bin')):
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result = file_utils.is_binary_file(test_file_path)
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assert result, "Generic binary data should be detected as binary"
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def test_content_based_detection():
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"""Test the content-based binary detection logic.
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This test focuses on the _is_binary_content function which analyzes
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file content to determine if it's binary without relying on magic or extensions.
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"""
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# Create a temporary file with C source code patterns
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import tempfile
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test_patterns = [
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(b'#include <stdio.h>\nint main(void) { return 0; }', False), # C source
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(b'class Test { public: void method(); };', False), # C++ source
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(b'import java.util.Scanner;', False), # Java source
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(b'package main\nimport "fmt"\n', False), # Go source
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(b'using namespace std;', False), # C++ namespace
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(b'function test() { return true; }', False), # JavaScript
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(b'\x00\x01\x02\x03\x04\x05', True), # Binary data with null bytes
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(b'#!/bin/bash\necho "Hello"', False), # Shell script
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(b'<!DOCTYPE html><html></html>', False), # HTML
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(b'{\n "key": "value"\n}', False), # JSON
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]
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for content, expected_binary in test_patterns:
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with tempfile.NamedTemporaryFile(delete=False) as tmp:
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tmp.write(content)
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tmp_path = tmp.name
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try:
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# Test the content detection function directly
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result = _is_binary_content(tmp_path)
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assert result == expected_binary, f"Failed for content: {content[:20]}..."
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finally:
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# Clean up the temporary file
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os.unlink(tmp_path)
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def test_comprehensive_binary_detection():
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"""Test the complete binary detection pipeline with different file types.
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This test verifies that the binary detection works correctly for a variety
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of file types, considering extensions, content analysis, and magic detection.
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"""
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# Create test files with different extensions and content
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import tempfile
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test_cases = [
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('.c', b'#include <stdio.h>\nint main() { return 0; }', False),
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('.txt', b'This is a text file with some content.', False),
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('.bin', b'\x00\x01\x02\x03Binary data with null bytes', True),
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('.py', b'def main():\n print("Hello world")\n', False),
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('.js', b'function hello() { console.log("Hi"); }', False),
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('.unknown', b'#include <stdio.h>\n// This has source patterns', False),
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('.dat', bytes([i % 256 for i in range(256)]), True), # Full binary data
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]
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for ext, content, expected_binary in test_cases:
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with tempfile.NamedTemporaryFile(suffix=ext, delete=False) as tmp:
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tmp.write(content)
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tmp_path = tmp.name
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try:
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# Test the full binary detection pipeline
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result = is_binary_file(tmp_path)
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assert result == expected_binary, f"Failed for extension {ext} with content: {content[:20]}..."
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finally:
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# Clean up the temporary file
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os.unlink(tmp_path) |