Fix GzipFile's handling of filenames given as bytes objects.

Add relevant tests for GzipFile, and also for BZ2File and LZMAFile.

3 files changed, 53 insertions, 0 deletions

diff --git a/Lib/test/test_bz2.py b/Lib/test/test_bz2.py
index 6b1a93c..257b144 100644
--- a/Lib/test/test_bz2.py
+++ b/Lib/test/test_bz2.py
@@ -522,6 +522,21 @@ class BZ2FileTest(BaseTest):
         with BZ2File(self.filename) as bz2f:
             self.assertEqual(bz2f.read(), data1 + data2)
 
+    def testOpenBytesFilename(self):
+        str_filename = self.filename
+        try:
+            bytes_filename = str_filename.encode("ascii")
+        except UnicodeEncodeError:
+            self.skipTest("Temporary file name needs to be ASCII")
+        with BZ2File(bytes_filename, "wb") as f:
+            f.write(self.DATA)
+        with BZ2File(bytes_filename, "rb") as f:
+            self.assertEqual(f.read(), self.DATA)
+        # Sanity check that we are actually operating on the right file.
+        with BZ2File(str_filename, "rb") as f:
+            self.assertEqual(f.read(), self.DATA)
+
+
     # Tests for a BZ2File wrapping another file object:
 
     def testReadBytesIO(self):
diff --git a/Lib/test/test_gzip.py b/Lib/test/test_gzip.py
index bb97097..af73953 100644
--- a/Lib/test/test_gzip.py
+++ b/Lib/test/test_gzip.py
@@ -355,6 +355,20 @@ class TestGzip(BaseTest):
             with gzip.GzipFile(fileobj=f, mode="w") as g:
                 pass
 
+    def test_bytes_filename(self):
+        str_filename = self.filename
+        try:
+            bytes_filename = str_filename.encode("ascii")
+        except UnicodeEncodeError:
+            self.skipTest("Temporary file name needs to be ASCII")
+        with gzip.GzipFile(bytes_filename, "wb") as f:
+            f.write(data1 * 50)
+        with gzip.GzipFile(bytes_filename, "rb") as f:
+            self.assertEqual(f.read(), data1 * 50)
+        # Sanity check that we are actually operating on the right file.
+        with gzip.GzipFile(str_filename, "rb") as f:
+            self.assertEqual(f.read(), data1 * 50)
+
     # Testing compress/decompress shortcut functions
 
     def test_compress(self):
diff --git a/Lib/test/test_lzma.py b/Lib/test/test_lzma.py
index 22f2f47..a086586 100644
--- a/Lib/test/test_lzma.py
+++ b/Lib/test/test_lzma.py
@@ -655,6 +655,16 @@ class FileTestCase(unittest.TestCase):
                 self.assertEqual(f.read(), INPUT)
                 self.assertEqual(f.read(), b"")
 
+    def test_read_from_file_with_bytes_filename(self):
+        try:
+            bytes_filename = TESTFN.encode("ascii")
+        except UnicodeEncodeError:
+            self.skipTest("Temporary file name needs to be ASCII")
+        with TempFile(TESTFN, COMPRESSED_XZ):
+            with LZMAFile(bytes_filename) as f:
+                self.assertEqual(f.read(), INPUT)
+                self.assertEqual(f.read(), b"")
+
     def test_read_incomplete(self):
         with LZMAFile(BytesIO(COMPRESSED_XZ[:128])) as f:
             self.assertRaises(EOFError, f.read)
@@ -814,6 +824,20 @@ class FileTestCase(unittest.TestCase):
         finally:
             unlink(TESTFN)
 
+    def test_write_to_file_with_bytes_filename(self):
+        try:
+            bytes_filename = TESTFN.encode("ascii")
+        except UnicodeEncodeError:
+            self.skipTest("Temporary file name needs to be ASCII")
+        try:
+            with LZMAFile(bytes_filename, "w") as f:
+                f.write(INPUT)
+            expected = lzma.compress(INPUT)
+            with open(TESTFN, "rb") as f:
+                self.assertEqual(f.read(), expected)
+        finally:
+            unlink(TESTFN)
+
     def test_write_append_to_file(self):
         part1 = INPUT[:1024]
         part2 = INPUT[1024:1536]