Test of preservation

• When the item was moved, the local update flag was not set and it was not saved on the server.
• Compared to "the stacking order is wrong" or "it looks wrong", "I thought I was writing to the server, but I didn't" or "I wrote corrupt data" are much more serious, so they seem to have a higher priority than the apparent test.
• If I want to write a test case that says, "If I do this operation from this initial state, this kind of write should be done to the server," I need to be able to replace the write part to the server with a mock...
• If you try to do something like "save locally when offline," you'll need to disconnect anyway.

This page is auto-translated from /nishio/保存のテスト using DeepL. If you looks something interesting but the auto-translated English is not good enough to understand it, feel free to let me know at @nishio_en. I'm very happy to spread my thought to non-Japanese readers.