add some manual tests

[?]

Apr 9, 2023, 4:50 PM

QXX5JRHN726YGD5UQDWI7X2PCD33BW2TP6IXTUHGX3TD4BIGUI4AC

Dependencies

[2] TNRO6KLZ new live app

Change contents

file addition: Manual_tests.md (----------)

[2.2]

I care a lot about being able to automatically check _any_ property about my
program before it ever runs. However, some things don't have tests yet, either
because I don't know how to test them or because I've been lazy. I'll at least
record those here.

* clone this repo to a new client app, clear its save dir, run it, run the
driver, add a definition:
```
on.draw = function()
end
```
Hit F4. No error.
Quit driver, quit client app. Restart client app. No error.

* clone this repo to a new client app, clear its save dir, run it, run the
driver, add a definition that draws to screen:
```
on.draw = function()
love.graphics.print('hello!', 50,50)
end
```
Hit F4. Client app shows 'hello!'
Quit driver, quit client app. Restart client app. No error. Client app shows 'hello!'

* clone this repo to a new client app, clear its save dir, run it, run the
driver, add a definition containing invalid Lua:
```
on.draw = function(
```
Hit F4. Driver shows an error under the definition.

* clone this repo to a new client app, clear its save dir, run it, run the
driver, add a definition containing invalid Lua:
```
on.draw = function(
```
Hit F4. Driver shows an error under the definition as before.
Quit the client app. The invalid code is saved in file 0002-on.draw in the
save dir. However, the file 'head' in the save dir contains '1'.
Restart the client app. It loads up without error.
Switch back to the driver. Fix the definition.
```
on.draw = function()
end
```
Hit F4. The error disappears.

* clone this repo to a new client app, clear its save dir, run it, run the
driver, add a definition containing invalid Lua:
```
on.draw = function(
```
Hit F4. Driver shows an error under the definition as before.
Quit the client app. The invalid code is saved in file 0002-on.draw in the
save dir. However, the file 'head' in the save dir contains '1'.
[Don't restart the client app.]
Switch back to the driver. Hit F4. The driver hangs and needs to be
force-quit. [This is not ideal, but how things are today.]