bugfix: save previous file when dropping a new one on

Dependencies

• [2] BPWFKBXT new test: dragging and dropping a file on lines.love
• [*] CE4LZV4T drop last couple of manual tests
• [*] OTIBCAUJ love2d scaffold
• [*] AVTNUQYR basic test-enabled framework
• [*] 73OCE2MC after much struggle, a brute-force undo

Change contents

• edit in main_tests.lua at line 38
  [2.871]

  [2.871]
  + end

  +

  + function test_drop_file_saves_previous()

  + io.write('\ntest_drop_file_saves_previous')

  + App.screen.init{width=Margin_left+300, height=300}

  + -- initially editing a file called foo that hasn't been saved to filesystem yet

  + Lines = load_array{'abc', 'def'}

  + Filename = 'foo'

  + schedule_save()

  + -- now drag a new file bar from the filesystem

  + App.filesystem['bar'] = 'abc\ndef\nghi\n'

  + local fake_dropped_file = {

  + opened = false,

  + getFilename = function(self)

  + return 'bar'

  + end,

  + open = function(self)

  + self.opened = true

  + end,

  + lines = function(self)

  + assert(self.opened)

  + return App.filesystem['bar']:gmatch('[^\n]+')

  + end,

  + close = function(self)

  + self.opened = false

  + end,

  + }

  + App.filedropped(fake_dropped_file)

  + -- filesystem now contains a file called foo

  + check_eq(App.filesystem['foo'], 'abc\ndef\n', 'F - test_drop_file_saves_previous')
• edit in main.lua at line 193
  [6.1352]

  [7.8165]
  + -- first make sure to save edits on any existing file

  + if Next_save then

  + save_to_disk(Lines, Filename)

  + end

  + -- clear the slate for the new file