Merge in compatability mode with libmagic

The libmagic distribution uses the same package name `magic` as
python-magic, but has an incompatible API.  This change merges in a
copy of libmagic's bindings, wrapped to give deprecation warnings.

This is intended to a) mitigate the short-term pain to users and
packagers who need to figure out which to use, and b) give us a path
to merging the two sets of bindings.

I'd be happy for libmagic to take over this package if we could find a
path to it.

2 files changed, 36 insertions, 0 deletions

diff --git a/test/libmagic_test.py b/test/libmagic_test.py
new file mode 100644
index 0000000..5a0a290
--- /dev/null
+++ b/test/libmagic_test.py
@@ -0,0 +1,35 @@
+# coding: utf-8
+
+import unittest
+
+import magic
+
+
+class MagicTestCase(unittest.TestCase):
+
+    filename = 'test/testdata/test.pdf'
+    expected_mime_type = 'application/pdf'
+    expected_encoding = 'us-ascii'
+    expected_name = 'PDF document, version 1.2'
+
+    def assert_result(self, result):
+        self.assertEqual(result.mime_type, self.expected_mime_type)
+        self.assertEqual(result.encoding, self.expected_encoding)
+        self.assertEqual(result.name, self.expected_name)
+
+    def test_detect_from_filename(self):
+        result = magic.detect_from_filename(self.filename)
+        self.assert_result(result)
+
+    def test_detect_from_fobj(self):
+        with open(self.filename) as fobj:
+            result = magic.detect_from_fobj(fobj)
+        self.assert_result(result)
+
+    def test_detect_from_content(self):
+        with open(self.filename) as fobj:
+            result = magic.detect_from_content(fobj.read(4096))
+        self.assert_result(result)
+
+if __name__ == '__main__':
+    unittest.main()
diff --git a/test/run.py b/test/run.py
index c10c11f..6b37555 100644
--- a/test/run.py
+++ b/test/run.py
@@ -24,6 +24,7 @@ def run_test(versions):
         found = True
         print("Testing %s" % i)
         subprocess.run([i, os.path.join(this_dir, "test.py")], env=new_env, check=True)
+        subprocess.run([i, os.path.join(this_dir, "libmagic_test.py")], env=new_env, check=True)
 
     if not found:
         sys.exit("No versions found: " + str(versions))