test(ios): cover save export picker

tests/rom_importer_ios_save_export_test.lua

@@ -0,0 +1,60 @@
+package.path = "./?.lua;./?/init.lua;" .. package.path
+if not _G.love then _G.love = require("tests.love_stub") end
+
+local S = require("tests.harness").suite("rom importer iOS save export")
+local eq = S.eq
+local check = S.check
+
+love.system = love.system or {}
+local saved = {
+  createFile = love.system.createFile,
+  read = love.filesystem.read,
+  write = love.filesystem.write,
+}
+
+local writes = {}
+love.filesystem.read = function(name)
+  eq(name, "exports/red.sav", "export reads the generated save")
+  return "save-data"
+end
+love.filesystem.write = function(name, data)
+  writes[#writes + 1] = { name = name, data = data }
+  return true
+end
+
+local createCalls = {}
+love.system.createFile = function(name)
+  createCalls[#createCalls + 1] = name
+  return true
+end
+
+package.loaded["src.import.SaveFileIO"] = {
+  exportActiveSlot = function(version)
+    eq(version, "red", "exports the selected game save")
+    return true, "exports/red.sav"
+  end,
+}
+
+local RomImporter = require("src.import.RomImporter")
+local ri = setmetatable({
+  android = true,
+  ios = true,
+  workState = nil,
+  saveNotice = {},
+}, RomImporter)
+
+ri:exportSave("red")
+
+eq(#writes, 1, "stages the save for iOS export")
+eq(writes[1].name, "pending_export.sav", "uses the native bridge staging name")
+eq(writes[1].data, "save-data", "preserves the exported save data")
+eq(#createCalls, 1, "opens the system destination picker")
+eq(createCalls[1], "red.sav", "suggests the original save name")
+check(ri.saveNotice.red.ok, "reports that the destination picker opened")
+
+love.system.createFile = saved.createFile
+love.filesystem.read = saved.read
+love.filesystem.write = saved.write
+package.loaded["src.import.SaveFileIO"] = nil
+
+S.finish()