test: autosave after any shape

Manual_tests.md

@@ -13,7 +13,6 @@ Lua is dynamically typed. Tests can't patch over lack of type-checking.
 ### Todo list
 
 persistence:
-  draw a line, circle, rectangle, square, polygon, quit, restart. All the shapes you drew should still be visible.
   select a point and name it, quit, restart. Name is still visible.
 
 undo:

app.lua

@@ -276,8 +276,21 @@ end
 function App.open_for_writing(filename)
   App.filesystem[filename] = ''
   return {
-    write = function(self, s)
-              App.filesystem[filename] = App.filesystem[filename]..s
+    write = function(self, ...)
+              local args = {...}
+              for i,s in ipairs(args) do
+                App.filesystem[filename] = App.filesystem[filename]..s
+              end
+            end,
+    close = function(self)
+            end
+  }
+end
+
+function App.open_for_reading(filename)
+  return {
+    lines = function(self)
+              return App.filesystem[filename]:gmatch('[^\n]+')
             end,
     close = function(self)
             end
@@ -331,6 +344,7 @@ function App.disable_tests()
   App.newText = love.graphics.newText
   App.screen.draw = love.graphics.draw
   App.width = function(text) return text:getWidth() end
+  App.open_for_reading = function(filename) return io.open(filename, 'r') end
   App.open_for_writing = function(filename) return io.open(filename, 'w') end
   App.getClipboardText = love.system.getClipboardText
   App.setClipboardText = love.system.setClipboardText

drawing_tests.lua

@@ -2,9 +2,22 @@
 -- We minimize assumptions about specific pixels, and try to test at the level
 -- of specific shapes. In particular, no tests of freehand drawings.
 
+function test_creating_drawing_saves()
+  io.write('\ntest_creating_drawing_saves')
+  App.screen.init{width=120, height=60}
+  Filename = 'foo'
+  Lines = load_array{}
+  App.draw()
+  -- click on button to create drawing
+  App.run_after_mouse_click(8,Margin_top+8, 1)
+  -- filesystem contains drawing and an empty line of text
+  check_eq(App.filesystem['foo'], '```lines\n```\n\n', 'F - test_creating_drawing_saves')
+end
+
 function test_draw_line()
   io.write('\ntest_draw_line')
   -- display a drawing followed by a line of text (you shouldn't ever have a drawing right at the end)
+  Filename = 'foo'
   App.screen.init{width=Margin_left+300, height=300}
   Lines = load_array{'```lines', '```', ''}
   Line_width = 256  -- drawing coordinates 1:1 with pixels
@@ -28,6 +41,19 @@ function test_draw_line()
   check_eq(p1.y, 6, 'F - test_draw_line/p1:y')
   check_eq(p2.x, 35, 'F - test_draw_line/p2:x')
   check_eq(p2.y, 36, 'F - test_draw_line/p2:y')
+  -- The format on disk isn't perfectly stable. Table fields can be reordered.
+  -- So just reload from disk to verify.
+  Lines = load_from_disk(Filename)
+  local drawing = Lines[1]
+  check_eq(#drawing.shapes, 1, 'F - test_draw_line/save/#shapes')
+  check_eq(#drawing.points, 2, 'F - test_draw_line/save/#points')
+  check_eq(drawing.shapes[1].mode, 'line', 'F - test_draw_line/save/shape:1')
+  local p1 = drawing.points[drawing.shapes[1].p1]
+  local p2 = drawing.points[drawing.shapes[1].p2]
+  check_eq(p1.x, 5, 'F - test_draw_line/save/p1:x')
+  check_eq(p1.y, 6, 'F - test_draw_line/save/p1:y')
+  check_eq(p2.x, 35, 'F - test_draw_line/save/p2:x')
+  check_eq(p2.y, 36, 'F - test_draw_line/save/p2:y')
 end
 
 function test_draw_horizontal_line()

file.lua

@@ -2,7 +2,7 @@
 Drawing = require 'drawing'
 
 function load_from_disk(filename)
-  local infile = io.open(filename)
+  local infile = App.open_for_reading(filename)
   local result = load_from_file(infile)
   if infile then infile:close() end
   return result