feat(nx-mods): fire display hotkeys from Select+face chords

Co-authored-by: Cursor <cursoragent@cursor.com>

tests/engine/game_display_chord_test.lua

@@ -0,0 +1,122 @@
+-- Select+face chords fire Game:keypressed digits (NXMOD-06..10).
+-- Spec: Select held + A/B/Y/X/L → keys 2/3/5/6/7; without Select, face stays GB.
+package.path = "./?.lua;./?/init.lua;" .. package.path
+if not _G.love then _G.love = require("tests.love_stub") end
+
+local T = require("tests.harness")
+local check = T.check
+local eq = T.eq
+
+local Game = require("src.core.Game")
+local Input = require("src.core.Input")
+local GamepadMap = require("src.core.GamepadMap")
+
+local joy = {
+  isGamepad = function() return true end,
+  isGamepadDown = function(_, button) return false end,
+}
+
+local digits = {}
+local padForwarded = {}
+local wroteOptions = false
+
+local origKeypressed = Game.keypressed
+local origPad = Input.gamepadpressed
+local origWrite = Game.writeOptions
+
+function Game:keypressed(key)
+  digits[#digits + 1] = key
+  -- Mimic digit persistence side-effect for keys that write options.
+  if key == "2" or key == "3" or key == "5" or key == "6" or key == "7" then
+    wroteOptions = true
+  end
+end
+
+function Input:gamepadpressed(joystick, button)
+  padForwarded[#padForwarded + 1] = button
+  return origPad(self, joystick, button)
+end
+
+local function resetSpies()
+  digits = {}
+  padForwarded = {}
+  wroteOptions = false
+end
+
+local function holdSelect()
+  Input:init()
+  -- Press Select (SDL back) into Input so isDown("select") is true.
+  origPad(Input, joy, "back")
+  Input:step()
+  check(Input:isDown("select"), "Select held via Input")
+end
+
+-- --- Without Select: face buttons keep normal GB path (NXMOD-09) ---
+GamepadMap._setForceNXForTests(false)
+Input:init()
+resetSpies()
+Game:gamepadpressed(joy, "a")
+eq(#digits, 0, "no digit without Select")
+eq(#padForwarded, 1, "face reaches Input without Select")
+eq(padForwarded[1], "a", "Input receives face a")
+check(not wroteOptions, "no options write without Select chord")
+
+-- --- Select + face → same digit path as PC keys (NXMOD-06..08, NXMOD-10) ---
+local chordCases = {
+  { button = "a", digit = "2", label = "Select+A -> 2" },
+  { button = "b", digit = "3", label = "Select+B -> 3" },
+  { button = "y", digit = "5", label = "Select+Y -> 5" },
+  { button = "x", digit = "6", label = "Select+X -> 6" },
+  { button = "leftshoulder", digit = "7", label = "Select+L -> 7" },
+}
+
+for _, case in ipairs(chordCases) do
+  holdSelect()
+  resetSpies()
+  Game:gamepadpressed(joy, case.button)
+  eq(#digits, 1, case.label .. " fires keypressed once")
+  eq(digits[1], case.digit, case.label)
+  eq(#padForwarded, 0, case.label .. " does not forward face to Input")
+  check(wroteOptions, case.label .. " uses digit options path")
+end
+
+-- --- NX Nintendo UX: physical A (SDL b) → 2, physical B (SDL a) → 3 ---
+GamepadMap._setForceNXForTests(true)
+holdSelect()
+resetSpies()
+Game:gamepadpressed(joy, "b") -- physical Nintendo A
+eq(digits[1], "2", "NX Select+physical A (SDL b) -> key 2")
+eq(#padForwarded, 0, "NX chord A does not forward face")
+check(wroteOptions, "NX chord A options path")
+
+holdSelect()
+resetSpies()
+Game:gamepadpressed(joy, "a") -- physical Nintendo B
+eq(digits[1], "3", "NX Select+physical B (SDL a) -> key 3")
+eq(#padForwarded, 0, "NX chord B does not forward face")
+
+-- Without Select on NX, face still goes to Input (no accidental cycle).
+Input:init()
+resetSpies()
+Game:gamepadpressed(joy, "b")
+eq(#digits, 0, "NX no digit without Select")
+eq(#padForwarded, 1, "NX face reaches Input without Select")
+
+-- Dual-path Select: joystick isGamepadDown("back") also counts as held.
+GamepadMap._setForceNXForTests(false)
+Input:init()
+resetSpies()
+local joySelectDown = {
+  isGamepad = function() return true end,
+  isGamepadDown = function(_, button) return button == "back" end,
+}
+Game:gamepadpressed(joySelectDown, "y")
+eq(digits[1], "5", "Select via isGamepadDown(back) + Y -> 5")
+eq(#padForwarded, 0, "isGamepadDown Select chord does not forward face")
+
+GamepadMap._setForceNXForTests(false)
+Game.keypressed = origKeypressed
+Input.gamepadpressed = origPad
+Game.writeOptions = origWrite
+
+T.finish()