test(libScePad): cover the scePadGetTriggerEffectState handle and argument checks

Co-Authored-By: Claude Opus 5.5 <[email protected]>

core/libs/tests/GuestPad.cpp

@@ -591,6 +591,11 @@ static bool TriggerIs(int trigger, bool valid, std::uint32_t mode, const std::ar
 }
 
 static void CheckTriggerEffect(int user, int handle) {
+    PadTriggerEffectStateInformation info{};
+    Require(scePadGetTriggerEffectState(0, &info) == PAD_ERROR_INVALID_HANDLE);
+    Require(scePadGetTriggerEffectState(0, nullptr) == PAD_ERROR_INVALID_HANDLE);
+    Require(scePadGetTriggerEffectState(handle, nullptr) == PAD_ERROR_INVALID_ARG);
+    Require(scePadGetTriggerEffectState(handle, &info) == PAD_OK);
     std::array<std::uint8_t, 120> param{};
     const auto command = [&](int trigger, std::uint32_t mode, const std::array<std::uint8_t, 3>& data) {
         std::memcpy(param.data() + 8 + 56 * trigger, &mode, sizeof(mode));
@@ -614,6 +619,7 @@ static void CheckTriggerEffect(int user, int handle) {
     command(0, 2, {2, 5, 8});
     Require(scePadSetTriggerEffect(special, param.data()) == PAD_OK && TriggerIs(0, false, 0, off, 0));
     Require(scePadClose_nid_postfix(special) == PAD_OK);
+    Require(scePadGetTriggerEffectState(special, &info) == PAD_ERROR_INVALID_HANDLE);
 }
 
 static void CheckAccessibilityControllerState(int handle) {

docs/dev/debt/libScePad.md

@@ -4,6 +4,7 @@
 
 - [scePadEnableExtensionPort](../../../core/libs/prx/libScePad/Export.cpp) returns success without changing extension-port state. The boolean argument is recovered; connected-device behavior is not modeled.
 - [scePadSetLightBarBaseBrightness, scePadDisableTriggerEffect](../../../core/libs/prx/libScePad/Export.cpp) (libScePad) - return success for known handles without changing hardware states. `scePadIsLightBarBaseBrightnessControllable` reports 1 while the modifier is a no-op.
+- [scePadGetTriggerEffectState](../../../core/libs/prx/libScePad/Export.cpp) (libScePad) - returns a zeroed state for every known handle, whatever trigger effect is set. The handle and null-output errors and their order are those of the other exports in the file, not measured on a console.
 
 ### Unknown function info