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import os
import unittest
from io import BytesIO
from pathlib import Path
from tempfile import NamedTemporaryFile
import pytest
import puremagic
LOCAL_DIR = os.path.realpath(os.path.dirname(__file__))
RESOUCE_DIR = os.path.join(LOCAL_DIR, "resources")
IMAGE_DIR = os.path.join(LOCAL_DIR, "resources", "images")
VIDEO_DIR = os.path.join(LOCAL_DIR, "resources", "video")
AUDIO_DIR = os.path.join(LOCAL_DIR, "resources", "audio")
OFFICE_DIR = os.path.join(LOCAL_DIR, "resources", "office")
ARCHIVE_DIR = os.path.join(LOCAL_DIR, "resources", "archive")
MEDIA_DIR = os.path.join(LOCAL_DIR, "resources", "media")
SYSTEM_DIR = os.path.join(LOCAL_DIR, "resources", "system")
TGA_FILE = os.path.join(IMAGE_DIR, "test.tga")
class MockBytesIO(BytesIO):
def seek(self, offset, whence=0):
if offset < 0:
raise OSError("Invalid seek position")
return super().seek(offset, whence)
class TestMagic(unittest.TestCase):
def setUp(self):
self.mp4magic = b"\x00\x00\x00\x1c\x66\x74\x79\x70\x4d\x53\x4e\
\x56\x01\x29\x00\x46\x4d\x53\x4e\x56\x6d\x70\x34\x32"
self.expect_ext = ".mp4"
self.expect_mime = "video/mp4"
def group_test(self, directory):
failures = []
ext_failures = []
mime_failures = []
for item in os.listdir(directory):
try:
ext = puremagic.from_file(os.path.join(directory, item))
except puremagic.PureError:
failures.append(item)
else:
if not item.endswith(ext):
ext_failures.append((item, ext))
try:
mime = puremagic.from_file(os.path.join(directory, item), mime=True)
except puremagic.PureError:
failures.append(item)
else:
if not mime:
mime_failures.append(item)
if failures:
raise AssertionError(
"The following items could not be identified from the {} folder: {}".format(
directory, ", ".join(failures)
)
)
if ext_failures:
raise AssertionError(
"The following files did not have the expected extensions: {}".format(
", ".join([f'"{item}" expected "{ext}"' for item, ext in ext_failures])
)
)
if mime_failures:
raise AssertionError("The following files did not have a mime type: {}".format(", ".join(mime_failures)))
def test_file(self):
"""File identification"""
mp4file = NamedTemporaryFile(delete=False)
mp4file.write(self.mp4magic)
mp4file.close()
ext = puremagic.from_file(mp4file.name)
os.unlink(mp4file.name)
self.assertEqual(self.expect_ext, ext)
def test_hex_string(self):
"""Hex string identification"""
ext = puremagic.from_string(self.mp4magic)
self.assertEqual(self.expect_ext, ext)
def test_string(self):
"""String identification"""
ext = puremagic.from_string(bytes(self.mp4magic))
self.assertEqual(self.expect_ext, ext)
def test_string_with_confidence(self):
"""String identification: magic_string"""
ext = puremagic.magic_string(bytes(self.mp4magic))
self.assertEqual(self.expect_ext, ext[0].extension)
self.assertRaises(ValueError, puremagic.magic_string, "")
def test_magic_string_with_filename_hint(self):
"""String identification: magic_string with hint"""
filename = os.path.join(OFFICE_DIR, "test.xlsx")
with open(filename, "rb") as f:
data = f.read()
ext = puremagic.magic_string(data, filename=filename)
self.assertEqual(".xlsx", ext[0].extension)
def test_not_found(self):
"""Bad file type via string"""
try:
with self.assertRaises(puremagic.PureError):
puremagic.from_string("not applicable string")
except TypeError:
# Python 2.6 doesn't support using
# assertRaises as a context manager
pass
def test_magic_file(self):
"""File identification with magic_file"""
self.assertEqual(puremagic.magic_file(TGA_FILE)[0].extension, ".tga")
open("test_empty_file", "w").close()
try:
self.assertRaises(ValueError, puremagic.magic_file, "test_empty_file")
finally:
os.unlink("test_empty_file")
def test_stream(self):
"""Stream identification"""
ext = puremagic.from_stream(BytesIO(self.mp4magic))
self.assertEqual(self.expect_ext, ext)
self.assertRaises(ValueError, puremagic.from_stream, BytesIO(b""))
def test_magic_stream(self):
"""File identification with magic_stream"""
with open(TGA_FILE, "rb") as f:
stream = BytesIO(f.read())
result = puremagic.magic_stream(stream, TGA_FILE)
self.assertEqual(result[0].extension, ".tga")
self.assertRaises(ValueError, puremagic.magic_stream, BytesIO(b""))
def test_small_stream_error(self):
ext = puremagic.from_stream(MockBytesIO(b"#!/usr/bin/env python"))
self.assertEqual(ext, ".py")
def test_mime(self):
"""Identify mime type"""
self.assertEqual(puremagic.from_file(TGA_FILE, True), "image/tga")
def test_images(self):
"""Test common image formats"""
self.group_test(IMAGE_DIR)
def test_video(self):
"""Test common video formats"""
self.group_test(VIDEO_DIR)
def test_audio(self):
"""Test common audio formats"""
self.group_test(AUDIO_DIR)
def test_office(self):
"""Test common office document formats"""
# Office files have very similar magic numbers, and may overlap
for item in os.listdir(OFFICE_DIR):
puremagic.from_file(os.path.join(OFFICE_DIR, item))
def test_archive(self):
"""Test common compressed archive formats"""
# pcapng files from https://wiki.wireshark.org/Development/PcapNg
self.group_test(ARCHIVE_DIR)
def test_media(self):
"""Test common media formats"""
self.group_test(MEDIA_DIR)
def test_system(self):
"""Test common system formats"""
self.group_test(SYSTEM_DIR)
def test_ext(self):
"""Test ext from filename"""
ext = puremagic.ext_from_filename("test.tar.bz2")
assert ext == ".tar.bz2", ext
def test_cmd_options(self):
"""Test CLI options"""
from puremagic.main import command_line_entry
command_line_entry(__file__, os.path.join(AUDIO_DIR, "test.mp3"), "-v")
command_line_entry(__file__, "DOES NOT EXIST FILE")
command_line_entry(__file__, os.path.join(RESOUCE_DIR, "fake_file"), "-v")
def test_bad_magic_input(self):
"""Test bad magic input"""
with pytest.raises(ValueError):
puremagic.main._magic(None, None, None)
def test_fake_file(self):
assert puremagic.magic_file(filename=Path(LOCAL_DIR, "resources", "fake_file")) == []
if __name__ == "__main__":
suite = unittest.TestLoader().loadTestsFromTestCase(TestMagic)
unittest.TextTestRunner(verbosity=2).run(suite)
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