drop a duplicate test and add a new one

Author: Changaco

tests/test_rwx.py

@@ -97,22 +97,6 @@ def test_custom_writer_and_stream_reader():
         check_archive(archive, tree)
 
 
-def test_custom_writer_and_seekable_stream_reader():
-    # Collect information on what should be in the archive
-    tree = treestat('libarchive')
-
-    # Create an archive of our libarchive/ directory
-    stream = io.BytesIO()
-    with libarchive.custom_writer(stream.write, '7zip') as archive:
-        archive.add_files('libarchive/')
-    stream.seek(0)
-
-    # Read the archive and check that the data is correct
-    with libarchive.seekable_stream_reader(stream, '7zip') as archive:
-        paths = [entry.name.rstrip('/') for entry in archive]
-        assert sorted(paths) == sorted(tree)
-
-
 @patch('libarchive.ffi.write_fail')
 def test_write_fail(write_fail_mock):
     buf = bytes(bytearray(1000000))
@@ -133,6 +117,14 @@ def test_write_not_fail(write_fail_mock):
     assert not write_fail_mock.called
 
 
+def test_adding_nonexistent_file_to_archive():
+    stream = io.BytesIO()
+    with libarchive.custom_writer(stream.write, 'zip') as archive:
+        with pytest.raises(libarchive.ArchiveError):
+            archive.add_files('nonexistent')
+        archive.add_files('libarchive/')
+
+
 @pytest.mark.parametrize(
     'archfmt,data_bytes',
     [('zip', b'content'),