rename and refine comments

Author: 5ec1cff

Lib/test/test_zipfile/test_core.py

@@ -3447,8 +3447,8 @@ def test_too_short(self):
         self.assertEqual(
             b"zzz", zipfile._Extra.strip(b"zzz", (self.ZIP64_EXTRA,)))
 
-class StoreSeekReadTest(unittest.TestCase):
-    def test_store_seek_read(self):
+class StoredZipExtFileRandomAccessTest(unittest.TestCase):
+    def test_random_access(self):
         from _pyio import BytesIO
         class StatIO(BytesIO):
             def __init__(self):
@@ -3464,36 +3464,36 @@ def get_bytes_read(self):
                 return self.bytes_read
 
         sio = StatIO()
+        # 100000 bytes
         txt = b'0123456789'*10000
 
         # Check seek on a file
-        with zipfile.ZipFile(sio, "w") as zipf:
-            zipf.writestr("foo.txt", txt) # 100000 bytes
+        with zipfile.ZipFile(sio, "w", compression=zipfile.ZIP_STORED) as zipf:
+            zipf.writestr("foo.txt", txt)
 
         with zipfile.ZipFile(sio, "r") as zipf:
             with zipf.open("foo.txt", "r") as fp:
                 br = sio.get_bytes_read()
                 fp.seek(50000, os.SEEK_CUR)
-                self.assertEqual(sio.get_bytes_read() - br, 0, 'seek produces extra read!')
+                self.assertEqual(sio.get_bytes_read() - br, 0, 'seek produces redundant read!')
 
                 b = fp.read(100)
                 self.assertEqual(b, txt[:100])
 
+                # seek length must be greater than ZipExtFile.MIN_READ_SIZE (4096)
                 # backward seek
-                # seek length must be more than MIN_READ_SIZE (4096)
                 br = sio.get_bytes_read()
                 fp.seek(5000, os.SEEK_CUR)
                 b = fp.read(100)
                 self.assertEqual(b, txt[50000:50100])
-                self.assertLessEqual(sio.get_bytes_read() - br, 4096, 'read more bytes after backward seek!')
+                self.assertLessEqual(sio.get_bytes_read() - br, 4096, 'read redundant bytes during backward seek!')
 
                 # forward seek
-                # seek length must be more than MIN_READ_SIZE (4096)
                 br = sio.get_bytes_read()
                 fp.seek(-40000, os.SEEK_CUR)
                 b = fp.read(100)
                 self.assertEqual(b, txt[10100:10200])
-                self.assertLessEqual(sio.get_bytes_read() - br, 4096, 'read more bytes after forward seek!')
+                self.assertLessEqual(sio.get_bytes_read() - br, 4096, 'read redundant bytes during forward seek!')
 
 if __name__ == "__main__":
     unittest.main()