dinput8/tests: Add some HID joystick IDirectInputDevice8_(Un)Acquire tests.

dlls/dinput8/tests/hid.c

@@ -3721,11 +3721,31 @@ static void test_simple_joystick(void)
     ok( hr == DI_OK, "IDirectInputDevice8_SetCooperativeLevel returned: %#x\n", hr );
     hr = IDirectInputDevice8_SetCooperativeLevel( device, hwnd, DISCL_FOREGROUND | DISCL_EXCLUSIVE );
     ok( hr == DI_OK, "IDirectInputDevice8_SetCooperativeLevel returned: %#x\n", hr );
+
+    hr = IDirectInputDevice8_Unacquire( device );
+    ok( hr == DI_NOEFFECT, "IDirectInputDevice8_Unacquire returned: %#x\n", hr );
+    hr = IDirectInputDevice8_Acquire( device );
+    ok( hr == DI_OK, "IDirectInputDevice8_Acquire returned: %#x\n", hr );
+    hr = IDirectInputDevice8_SetCooperativeLevel( device, hwnd, DISCL_FOREGROUND | DISCL_EXCLUSIVE );
+    todo_wine
+    ok( hr == DIERR_ACQUIRED, "IDirectInputDevice8_SetCooperativeLevel returned: %#x\n", hr );
+    hr = IDirectInputDevice8_Unacquire( device );
+    ok( hr == DI_OK, "IDirectInputDevice8_Unacquire returned: %#x\n", hr );
+
     DestroyWindow( hwnd );
 
     hr = IDirectInputDevice8_SetCooperativeLevel( device, NULL, DISCL_BACKGROUND | DISCL_NONEXCLUSIVE );
     ok( hr == DI_OK, "IDirectInputDevice8_SetCooperativeLevel returned: %#x\n", hr );
 
+    hr = IDirectInputDevice8_Acquire( device );
+    ok( hr == DI_OK, "IDirectInputDevice8_Acquire returned: %#x\n", hr );
+
+    hr = IDirectInputDevice8_Unacquire( device );
+    ok( hr == DI_OK, "IDirectInputDevice8_Unacquire returned: %#x\n", hr );
+
+    /* FIXME: we have to wait a bit because Wine DInput internal thread keeps a reference */
+    Sleep( 100 );
+
     ref = IDirectInputDevice8_Release( device );
     ok( ref == 0, "IDirectInputDeviceW_Release returned %d\n", ref );